chore(main): release 2.5.0 (#25)

Co-authored-by: jimehbot[bot] <132453784+jimehbot[bot]@users.noreply.github.com>

.cr.yaml

@@ -0,0 +1,2 @@
+---
+release-name-template: "v{{ .Version }}"

.dockerignore

@@ -0,0 +1,3 @@
+bin/*
+dist/*
+releases/*

.github/.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "2.5.0"
+}

.github/release-please-config.json

@@ -0,0 +1,26 @@
+{
+  "packages": {
+    ".": {
+      "release-type": "go",
+      "changelog-path": "CHANGELOG.md",
+      "bump-minor-pre-major": true,
+      "bump-patch-for-minor-pre-major": true,
+      "draft": false,
+      "always-update": true,
+      "prerelease": false,
+      "extra-files": [
+        {
+          "type": "yaml",
+          "path": "chart/Chart.yaml",
+          "jsonpath": "appVersion"
+        },
+        {
+          "type": "yaml",
+          "path": "chart/Chart.yaml",
+          "jsonpath": "version"
+        }
+      ]
+    }
+  },
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}

.github/workflows/ci.yml

@@ -0,0 +1,108 @@
+---
+name: CI
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.mod"
+      - name: Install dependencies
+        run: go mod download
+      - name: Build binary
+        run: make
+      - name: Run and make request
+        run: |
+          ./bin/casecmp -p 8080 &
+          curl --silent --retry 10 --retry-delay 1 --retry-connrefused \
+              http://localhost:8080/
+
+  helm-lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: azure/setup-helm@v4
+      - name: Lint chart
+        run: helm lint chart
+      - name: Template chart
+        run: helm template chart
+
+  release-please:
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/heads/')
+    permissions:
+      contents: write
+      pull-requests: write
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }} # e.g. v1.0.0
+      version: ${{ steps.release.outputs.version }} # e.g. 1.0.0
+    steps:
+      - uses: jimeh/release-please-manifest-action@v2
+        id: release
+        with:
+          target-branch-pattern: '^(main|master|release-[0-9]+(\.[0-9]+)?\.x)$'
+          app-id: ${{ secrets.RELEASE_BOT_APP_ID }}
+          private-key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
+
+  release:
+    runs-on: ubuntu-latest
+    needs: [build, helm-lint, release-please]
+    if: needs.release-please.outputs.release_created
+    permissions:
+      contents: write
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - run: git fetch --force --tags
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - uses: docker/setup-buildx-action@v2
+      - name: Docker Login
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.mod"
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          version: '~> v2'
+          args: release --clean
+        env:
+          REGISTRY: ghcr.io
+          IMAGE_NAME: ${{ github.repository }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  release-chart:
+    runs-on: ubuntu-latest
+    needs: [release, release-please]
+    if: needs.release-please.outputs.release_created
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - run: git fetch --force --tags
+      - name: Configure Git
+        run: |
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor }}@users.noreply.github.com"
+      - name: Install Helm
+        uses: azure/setup-helm@v4
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1
+        with:
+          charts_dir: chart
+          config: .cr.yaml
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.gitignore

@@ -1 +1,4 @@
 bin/*
+dist/*
+releases/*
+dist/

.goreleaser.yml

@@ -0,0 +1,110 @@
+version: 2
+before:
+  hooks:
+    - go mod tidy
+builds:
+  - env:
+      - CGO_ENABLED=0
+    mod_timestamp: "{{ .CommitTimestamp }}"
+    flags:
+      - -trimpath
+    ldflags:
+      - "-s -w -X main.version={{ .Version }} -X main.commit={{ .Commit }}"
+    goos:
+      - "darwin"
+      - "freebsd"
+      - "linux"
+      - "windows"
+    goarch:
+      - "amd64"
+      - "386"
+      - "arm"
+      - "arm64"
+    goarm:
+      - "6"
+      - "7"
+
+universal_binaries:
+  - replace: false
+
+archives:
+  - formats: ["tar.gz"]
+    name_template: |-
+      {{ .ProjectName }}-{{ .Version }}_{{ if eq .Os "darwin" }}macos{{ else }}{{ .Os }}{{ end }}_{{ if eq .Arch "all" }}universal{{ else }}{{ .Arch }}{{ end }}{{ if .Arm }}v{{ .Arm }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}
+    wrap_in_directory: true
+    format_overrides:
+      - goos: windows
+        formats: ["zip"]
+
+checksum:
+  name_template: "checksums.txt"
+snapshot:
+  version_template: "{{ .Tag }}-next"
+
+changelog:
+  disable: true
+
+dockers:
+  - image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-amd64"
+    dockerfile: Dockerfile
+    use: buildx
+    goos: linux
+    goarch: amd64
+    build_flag_templates:
+      - "--platform=linux/amd64"
+  - image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-386"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-386"
+    dockerfile: Dockerfile
+    use: buildx
+    goos: linux
+    goarch: "386"
+    build_flag_templates:
+      - "--platform=linux/386"
+  - image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-arm64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-arm64"
+    use: buildx
+    goos: linux
+    goarch: arm64
+    dockerfile: Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm64"
+  - image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-armv6"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-armv6"
+    use: buildx
+    goos: linux
+    goarch: arm
+    goarm: "6"
+    dockerfile: Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm/v6"
+  - image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-armv7"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-armv7"
+    use: buildx
+    goos: linux
+    goarch: arm
+    goarm: "7"
+    dockerfile: Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm/v7"
+
+docker_manifests:
+  - name_template: "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}"
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-386"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-arm64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-armv6"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:{{ .Version }}-armv7"
+  - name_template: "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest"
+    image_templates:
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-amd64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-386"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-arm64"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-armv6"
+      - "{{ .Env.REGISTRY }}/{{ .Env.IMAGE_NAME }}:latest-armv7"

CHANGELOG.md

@@ -0,0 +1,78 @@
+# Changelog
+
+## [2.5.0](https://github.com/jimeh/casecmp/compare/v2.4.1...v2.5.0) (2025-04-22)
+
+
+### Features
+
+* **chart:** add revisionHistoryLimit configuration ([#24](https://github.com/jimeh/casecmp/issues/24)) ([37968b6](https://github.com/jimeh/casecmp/commit/37968b6d7179e6c48cdfb266a74d92af88c5fb0a))
+
+## [2.4.1](https://github.com/jimeh/casecmp/compare/v2.4.0...v2.4.1) (2025-03-16)
+
+
+### Bug Fixes
+
+* **ci/build:** add missing permission to release job ([cc42b4f](https://github.com/jimeh/casecmp/commit/cc42b4f2bc8112b249bcf1a596989618ee80ca0d))
+
+## [2.4.0](https://github.com/jimeh/casecmp/compare/v2.3.0...v2.4.0) (2025-03-16)
+
+
+### Features
+
+* use Go 1.24 and a net/http ServeMux for routing ([#19](https://github.com/jimeh/casecmp/issues/19)) ([50c538e](https://github.com/jimeh/casecmp/commit/50c538e3b78d841bf09653a1571a8019a2126be0))
+
+## [2.3.0](https://github.com/jimeh/casecmp/compare/v2.2.0...v2.3.0) (2023-04-26)
+
+
+### Features
+
+* **version:** add Go version to version output ([5500933](https://github.com/jimeh/casecmp/commit/55009336891b6c281542cf85498abb04816879d3))
+
+## [2.2.0](https://github.com/jimeh/casecmp/compare/v2.1.0...v2.2.0) (2023-03-10)
+
+
+### Features
+
+* **license:** change license to CC0 1.0 Universal ([7faab18](https://github.com/jimeh/casecmp/commit/7faab1863b48e31e46b763ef7dca0eca1825f6f8))
+
+## [2.1.0](https://github.com/jimeh/casecmp/compare/v2.0.0...v2.1.0) (2022-11-14)
+
+
+### Features
+
+* **helm-chart:** add casecmp.httpsExamples value ([406f21f](https://github.com/jimeh/casecmp/commit/406f21f72115884503bfe3e928d993a536eb45b2))
+* **json:** add support for JSON request and response types ([0658bad](https://github.com/jimeh/casecmp/commit/0658bad90257aa55bfadea6b6167337b21df1a13))
+
+## [2.0.0](https://github.com/jimeh/casecmp/compare/v1.5.0...v2.0.0) (2022-11-14)
+
+
+### ⚠ BREAKING CHANGES
+
+* Long versions of command line flags are no longer supported.
+
+### Features
+
+* **chart:** add kubernetes helm chart ([4e36d51](https://github.com/jimeh/casecmp/commit/4e36d51dc1c081fd50b1397eabb736ad3fe21541))
+* **env:** support BIND environment variable ([623d2c2](https://github.com/jimeh/casecmp/commit/623d2c21b0a25d3b54b6cf3e18fc147a2faa8cd6))
+* remove external dependencies ([9a904fe](https://github.com/jimeh/casecmp/commit/9a904fee99e203d7ddb2a84e2d056d3ed8ec197a))
+
+## [1.5.0](https://github.com/jimeh/casecmp/compare/v1.4.0...v1.5.0) (2022-11-14)
+
+
+### Features
+
+* **deps:** upgrade to Go 1.19 ([75ddcce](https://github.com/jimeh/casecmp/commit/75ddccedf330497c0e04cd4b7f0679e647b8e190))
+
+## [1.4.0](https://github.com/jimeh/casecmp/compare/v1.3.0...v1.4.0) (2022-05-24)
+
+
+### Features
+
+* compare on GET requests with non-empty query string ([cdaaec6](https://github.com/jimeh/casecmp/commit/cdaaec6b0b763141476562047578844e6105ec7a))
+
+## [1.3.0](https://github.com/jimeh/casecmp/compare/v1.2.3...v1.3.0) (2022-02-13)
+
+
+### Features
+
+* **release:** setup for publishing docker images to ghcr ([1816e93](https://github.com/jimeh/casecmp/commit/1816e93170bb725f8da073b91070a981dd039fad))

Dockerfile

@@ -1,11 +1,6 @@
-FROM golang:1.8-alpine as builder
-ADD . /go/src/github.com/jimeh/casecmp
-WORKDIR /go/src/github.com/jimeh/casecmp
-RUN CGO_ENABLED=0 go build -a -o /casecmp \
-    -ldflags "-X main.Version=$(cat VERSION)"
-
 FROM scratch
-COPY --from=builder /casecmp /
+COPY ./casecmp /
+ENV PORT 8080
 EXPOSE 8080
 WORKDIR /
-CMD ["/casecmp", "--port", "8080"]
+ENTRYPOINT ["/casecmp"]

LICENSE

@@ -0,0 +1,116 @@
+CC0 1.0 Universal
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator and
+subsequent owner(s) (each and all, an "owner") of an original work of
+authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for the
+purpose of contributing to a commons of creative, cultural and scientific
+works ("Commons") that the public can reliably and without fear of later
+claims of infringement build upon, modify, incorporate in other works, reuse
+and redistribute as freely as possible in any form whatsoever and for any
+purposes, including without limitation commercial purposes. These owners may
+contribute to the Commons to promote the ideal of a free culture and the
+further production of creative, cultural and scientific works, or to gain
+reputation or greater distribution for their Work in part through the use and
+efforts of others.
+
+For these and/or other purposes and motivations, and without any expectation
+of additional consideration or compensation, the person associating CC0 with a
+Work (the "Affirmer"), to the extent that he or she is an owner of Copyright
+and Related Rights in the Work, voluntarily elects to apply CC0 to the Work
+and publicly distribute the Work under its terms, with knowledge of his or her
+Copyright and Related Rights in the Work and the meaning and intended legal
+effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not limited
+to, the following:
+
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+  and translate a Work;
+
+  ii. moral rights retained by the original author(s) and/or performer(s);
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+  depicted in a Work;
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+  subject to the limitations in paragraph 4(a), below;
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+  a Work;
+
+  vi. database rights (such as those arising under Directive 96/9/EC of the
+  European Parliament and of the Council of 11 March 1996 on the legal
+  protection of databases, and under any national implementation thereof,
+  including any amended or successor version of such directive); and
+
+  vii. other similar, equivalent or corresponding rights throughout the world
+  based on applicable law or treaty, and any national implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention of,
+applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and
+unconditionally waives, abandons, and surrenders all of Affirmer's Copyright
+and Related Rights and associated claims and causes of action, whether now
+known or unknown (including existing as well as future claims and causes of
+action), in the Work (i) in all territories worldwide, (ii) for the maximum
+duration provided by applicable law or treaty (including future time
+extensions), (iii) in any current or future medium and for any number of
+copies, and (iv) for any purpose whatsoever, including without limitation
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+detriment of Affirmer's heirs and successors, fully intending that such Waiver
+shall not be subject to revocation, rescission, cancellation, termination, or
+any other legal or equitable action to disrupt the quiet enjoyment of the Work
+by the public as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason be
+judged legally invalid or ineffective under applicable law, then the Waiver
+shall be preserved to the maximum extent permitted taking into account
+Affirmer's express Statement of Purpose. In addition, to the extent the Waiver
+is so judged Affirmer hereby grants to each affected person a royalty-free,
+non transferable, non sublicensable, non exclusive, irrevocable and
+unconditional license to exercise Affirmer's Copyright and Related Rights in
+the Work (i) in all territories worldwide, (ii) for the maximum duration
+provided by applicable law or treaty (including future time extensions), (iii)
+in any current or future medium and for any number of copies, and (iv) for any
+purpose whatsoever, including without limitation commercial, advertising or
+promotional purposes (the "License"). The License shall be deemed effective as
+of the date CC0 was applied by Affirmer to the Work. Should any part of the
+License for any reason be judged legally invalid or ineffective under
+applicable law, such partial invalidity or ineffectiveness shall not
+invalidate the remainder of the License, and in such case Affirmer hereby
+affirms that he or she will not (i) exercise any of his or her remaining
+Copyright and Related Rights in the Work or (ii) assert any associated claims
+and causes of action with respect to the Work, in either case contrary to
+Affirmer's express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+  a. No trademark or patent rights held by Affirmer are waived, abandoned,
+  surrendered, licensed or otherwise affected by this document.
+
+  b. Affirmer offers the Work as-is and makes no representations or warranties
+  of any kind concerning the Work, express, implied, statutory or otherwise,
+  including without limitation warranties of title, merchantability, fitness
+  for a particular purpose, non infringement, or the absence of latent or
+  other defects, accuracy, or the present or absence of errors, whether or not
+  discoverable, all to the greatest extent permissible under applicable law.
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+  disclaims responsibility for obtaining any necessary consents, permissions
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+<http://creativecommons.org/publicdomain/zero/1.0/>

Makefile

@@ -1,57 +1,27 @@
-DEV_DEPS = github.com/kardianos/govendor \
+NAME = casecmp
-github.com/mitchellh/gox
+BINARY = bin/${NAME}
-
+VERSION ?= $(shell git describe --tags)
-BINNAME = casecmp
+SOURCES = $(shell find . -name '*.go' -o -name 'Makefile')
-BINARY = bin/${BINNAME}
-DOCKERREPO = jimeh/casecmp
-BINDIR = $(shell dirname ${BINARY})
-SOURCES = $(shell find . -name '*.go' -o -name 'VERSION')
-VERSION = $(shell cat VERSION)
-OSARCH = "darwin/386 darwin/amd64 linux/386 linux/amd64 linux/arm"
-RELEASEDIR = releases
 
 $(BINARY): $(SOURCES)
-	go build -o ${BINARY} -ldflags "-X main.Version=${VERSION}"
+	CGO_ENABLED=0 go build -o ${BINARY} -ldflags \ "\
+		-s -w \
+		-X main.version=${VERSION} \
+		-X main.commit=$(shell git show --format="%h" --no-patch)"
 
 .PHONY: build
 build: $(BINARY)
 
-.PHONY: clean
-clean:
-	if [ -f ${BINARY} ]; then rm ${BINARY}; fi; \
-	if [ -d ${BINDIR} ]; then rmdir ${BINDIR}; fi
-
 .PHONY: run
 run: $(BINARY)
 	$(BINARY)
 
-.PHONY: deps
+.PHONY: clean
-deps:
+clean:
-	@govendor sync
+	$(eval BIN_DIR := $(shell dirname ${BINARY}))
-
+	if [ -f ${BINARY} ]; then rm ${BINARY}; fi
-.PHONY: dev-deps
+	if [ -d ${BIN_DIR} ]; then rmdir ${BIN_DIR}; fi
-dev-deps:
-	@$(foreach DEP,$(DEV_DEPS),go get $(DEP);)
-
-.PHONY: update-dev-deps
-update-dev-deps:
-	@$(foreach DEP,$(DEV_DEPS),go get -u $(DEP);)
-
-.PHONY: release-build
-release-build: deps
-	gox -output "${RELEASEDIR}/${BINNAME}_${VERSION}_{{.OS}}_{{.Arch}}" \
-		-osarch=${OSARCH} \
-		-ldflags "-X main.Version=${VERSION}"
-
-.SILENT: release
-.PHONY: release
-release: release-build
-	$(eval BINS := $(shell cd ${RELEASEDIR} && find . \
-		-name "${BINNAME}_${VERSION}_*" -not -name "*.tar.gz"))
-	cd $(RELEASEDIR); \
-		$(foreach BIN,$(BINS),tar -cvzf $(BIN).tar.gz $(BIN) && rm $(BIN);)
 
 .PHONY: docker
-docker: clean deps
+docker:
-	docker build -t "${DOCKERREPO}:latest" . \
+	docker build -t "$(shell whoami)/$(NAME)" .
-		&& docker tag "${DOCKERREPO}:latest" "${DOCKERREPO}:${VERSION}"

README.md

@@ -1,22 +1,7 @@
 # casecmp
 
-Case-insensitive string comparison, as an API. Because ¯\\_(ツ)\_/¯
+Case-insensitive string comparison, as an API. Because ¯\\\_(ツ)\_/¯
-
 
 ## License
 
-```
+[CC0 1.0 Universal](http://creativecommons.org/publicdomain/zero/1.0/)
-        DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-                    Version 2, December 2004
-
- Copyright (C) 2017 Jim Myhrberg
-
- Everyone is permitted to copy and distribute verbatim or modified
- copies of this license document, and changing it is allowed as long
- as the name is changed.
-
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. You just DO WHAT THE FUCK YOU WANT TO.
-```

VERSION

@@ -1 +0,0 @@
-1.0.1

chart/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

chart/Chart.yaml

@@ -0,0 +1,6 @@
+apiVersion: v2
+name: casecmp
+description: A Helm chart for casecmp
+type: application
+version: 2.5.0
+appVersion: 2.5.0

chart/templates/NOTES.txt

@@ -0,0 +1,22 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "casecmp.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "casecmp.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "casecmp.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "casecmp.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

chart/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "casecmp.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "casecmp.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "casecmp.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "casecmp.labels" -}}
+helm.sh/chart: {{ include "casecmp.chart" . }}
+{{ include "casecmp.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "casecmp.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "casecmp.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "casecmp.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "casecmp.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

chart/templates/deployment.yaml

@@ -0,0 +1,65 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  revisionHistoryLimit: {{ .Values.revisionHistoryLimit }}
+  selector:
+    matchLabels:
+      {{- include "casecmp.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "casecmp.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "casecmp.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          env:
+            - name: "FORCE_HTTPS"
+              value: "{{ if .Values.casecmp.httpsExamples }}true{{ end }}"
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

chart/templates/hpa.yaml

@@ -0,0 +1,28 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "casecmp.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}

chart/templates/ingress.yaml

@@ -0,0 +1,61 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "casecmp.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if and .Values.ingress.className (not (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion)) }}
+  {{- if not (hasKey .Values.ingress.annotations "kubernetes.io/ingress.class") }}
+  {{- $_ := set .Values.ingress.annotations "kubernetes.io/ingress.class" .Values.ingress.className}}
+  {{- end }}
+{{- end }}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            {{- if and .pathType (semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion) }}
+            pathType: {{ .pathType }}
+            {{- end }}
+            backend:
+              {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ $fullName }}
+                port:
+                  number: {{ $svcPort }}
+              {{- else }}
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+              {{- end }}
+          {{- end }}
+    {{- end }}
+{{- end }}

chart/templates/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "casecmp.selectorLabels" . | nindent 4 }}

chart/templates/serviceaccount.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "casecmp.serviceAccountName" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

chart/templates/tests/test-connection.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "casecmp.fullname" . }}-test-connection"
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "casecmp.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never

chart/values.yaml

@@ -0,0 +1,91 @@
+# Default values for casecmp.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+revisionHistoryLimit: 10
+
+image:
+  repository: ghcr.io/jimeh/casecmp
+  pullPolicy: IfNotPresent
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: ""
+
+casecmp:
+  # Use "https://" scheme in examples.
+  httpsExamples: false
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  create: true
+  # Annotations to add to the service account
+  annotations: {}
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+podAnnotations: {}
+
+podSecurityContext:
+  {}
+  # fsGroup: 2000
+
+securityContext:
+  {}
+  # capabilities:
+  #   drop:
+  #   - ALL
+  # readOnlyRootFilesystem: true
+  # runAsNonRoot: true
+  # runAsUser: 1000
+
+service:
+  type: ClusterIP
+  port: 80
+
+ingress:
+  enabled: false
+  className: ""
+  annotations:
+    {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  hosts:
+    - host: chart-example.local
+      paths:
+        - path: /
+          pathType: Prefix
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+resources:
+  {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+autoscaling:
+  enabled: false
+  minReplicas: 1
+  maxReplicas: 100
+  targetCPUUtilizationPercentage: 80
+  # targetMemoryUtilizationPercentage: 80
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}

go.mod

@@ -0,0 +1,3 @@
+module github.com/jimeh/casecmp
+
+go 1.24.1

main.go

@@ -1,82 +1,215 @@
 package main
 
 import (
+	"bytes"
+	"encoding/json"
+	"flag"
 	"fmt"
+	"io"
 	"log"
+	"net/http"
 	"os"
+	"runtime"
+	"strconv"
 	"strings"
-
+	"text/template"
-	"github.com/qiangxue/fasthttp-routing"
+	"time"
-	"github.com/valyala/fasthttp"
-	"gopkg.in/alecthomas/kingpin.v2"
 )
 
-// Version gets populated with version at build-time.
-var Version string
-var defaultPort = "8080"
-
 var (
-	port = kingpin.Flag("port", "Port to listen to.").Short('p').
+	version = "dev"
-		Default(defaultPort).String()
+	commit  = "unknown"
-	bind = kingpin.Flag("bind", "Bind address.").Short('b').
-		Default("0.0.0.0").String()
-	version = kingpin.Flag("version", "Print version info.").
-		Short('v').Bool()
 )
 
-func indexHandler(c *routing.Context) error {
+const (
-	c.Write([]byte(
+	name        = "casecmp"
-		"Case-insensitive string comparison, as an API. Because ¯\\_(ツ)_/¯\n" +
+	defaultPort = 8080
-			"\n" +
+	defaultBind = "0.0.0.0"
-			"Example:\n" +
+)
-			"curl -X POST -F \"a=Foo Bar\" -F \"b=FOO BAR\" " +
+
-			"http://" + string(c.Host()) + "/",
+// Argument parsing setup.
-	))
+var (
-	return nil
+	portFlag       = flag.Int("p", defaultPort, "Port to listen on")
+	bindFlag       = flag.String("b", defaultBind, "Bind address")
+	forceHTTPSFlag = flag.Bool(
+		"f", false, "Use https:// in example curl commands",
+	)
+	versionFlag = flag.Bool("v", false, "Print version info")
+)
+
+type IndexData struct {
+	Name    string
+	Version string
+	Scheme  string
+	Host    string
 }
 
-func casecmpHandler(c *routing.Context) error {
+var indexTpl = template.Must(template.New("index").Parse(`{{.Name}} {{.Version}}
-	a := c.FormValue("a")
+
-	b := c.FormValue("b")
+Case-insensitive string comparison, as an API. Because ¯\_(ツ)_/¯
+
+Example usage:
+curl -X POST -F "a=Foo Bar" -F "b=FOO BAR" {{.Scheme}}://{{.Host}}/
+curl -X GET "{{.Scheme}}://{{.Host}}/?a=Foo+Bar&b=FOO+BAR"
+curl -X GET -H "Accept: application/json" "{{.Scheme}}://{{.Host}}/?a=Foo+Bar&b=FOO+BAR"
+curl -X POST -H "Content-Type: application/json" -d '{"a":"Foo Bar","b":"FOO BAR"}' {{.Scheme}}://{{.Host}}/
+`))
+
+func indexHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "GET" || r.URL.RawQuery != "" {
+		casecmpHandler(w, r)
+		return
+	}
+
+	scheme := "http"
+	if r.TLS != nil || *forceHTTPSFlag {
+		scheme = "https"
+	}
+
+	err := indexTpl.Execute(w, &IndexData{
+		Name:    name,
+		Version: version,
+		Scheme:  scheme,
+		Host:    r.Host,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func aboutHandler(w http.ResponseWriter, _ *http.Request) {
+	_, err := fmt.Fprintf(w,
+		`%s %s
+
+https://github.com/jimeh/casecmp
+`,
+		name, version)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+type JSONData struct {
+	A string `json:"a"`
+	B string `json:"b"`
+}
+
+func casecmpHandler(w http.ResponseWriter, r *http.Request) {
+	equal, err := casecmp(r)
+	if err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = fmt.Fprint(w, err.Error())
+		return
+	}
 
 	resp := "0"
-	if strings.EqualFold(string(a), string(b)) {
+	if equal {
 		resp = "1"
 	}
 
-	c.Write([]byte(resp))
+	accept := r.Header.Get("Accept")
-	return nil
+	if strings.Contains(accept, "application/json") {
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+		_, _ = fmt.Fprintf(w, `{"result":%s}`, resp)
+
+		return
+	}
+
+	_, _ = fmt.Fprint(w, resp)
+}
+
+func casecmp(r *http.Request) (bool, error) {
+	var a, b string
+
+	contentType := r.Header.Get("Content-Type")
+	if strings.Contains(contentType, "application/json") {
+		body, err := io.ReadAll(r.Body)
+		if err != nil {
+			return false, err
+		}
+
+		d := JSONData{}
+		err = json.Unmarshal(body, &d)
+		if err != nil {
+			return false, fmt.Errorf("invalid JSON request: %w", err)
+		}
+
+		a = d.A
+		b = d.B
+	} else {
+		a = r.FormValue("a")
+		b = r.FormValue("b")
+	}
+
+	return strings.EqualFold(string(a), string(b)), nil
 }
 
 func printVersion() {
-	fmt.Println("casecmp " + Version)
+	var buffer bytes.Buffer
+	buffer.WriteString(fmt.Sprintf("%s %s", name, version))
+
+	if commit != "unknown" {
+		buffer.WriteString(fmt.Sprintf(" (%s)", commit))
+	}
+
+	buffer.WriteString(fmt.Sprintf(", built with %s", runtime.Version()))
+
+	fmt.Println(buffer.String())
 }
 
-func startServer() {
+func startServer() error {
-	r := routing.New()
+	if *portFlag == defaultPort {
-	r.Get("/", indexHandler)
-	r.Post("/", casecmpHandler)
-
-	server := fasthttp.Server{Handler: r.HandleRequest}
-
-	if *port == defaultPort {
 		envPort := os.Getenv("PORT")
 		if envPort != "" {
-			*port = envPort
+			v, err := strconv.Atoi(envPort)
+			if err != nil {
+				return err
+			}
+
+			*portFlag = v
 		}
 	}
 
-	address := *bind + ":" + *port
+	if *bindFlag == defaultBind {
-	fmt.Println("Listening on " + address)
+		envBind := os.Getenv("BIND")
-	log.Fatal(server.ListenAndServe(address))
+		if envBind != "" {
+			*bindFlag = envBind
+		}
+	}
+
+	if !*forceHTTPSFlag && os.Getenv("FORCE_HTTPS") != "" {
+		*forceHTTPSFlag = true
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/{$}", indexHandler)
+	mux.HandleFunc("/about", aboutHandler)
+	mux.HandleFunc("/about/{$}", aboutHandler)
+
+	address := fmt.Sprintf("%s:%d", *bindFlag, *portFlag)
+	fmt.Printf("Listening on %s\n", address)
+
+	srv := &http.Server{
+		ReadTimeout:  5 * time.Second,
+		WriteTimeout: 5 * time.Second,
+		IdleTimeout:  30 * time.Second,
+		Handler:      mux,
+		Addr:         address,
+	}
+
+	return srv.ListenAndServe()
 }
 
 func main() {
-	kingpin.Parse()
+	flag.Parse()
 
-	if *version {
+	if *versionFlag {
 		printVersion()
-	} else {
+		return
-		startServer()
+	}
+
+	err := startServer()
+	if err != nil {
+		log.Fatal(err)
 	}
 }

vendor/github.com/alecthomas/template/LICENSE

@@ -1,27 +0,0 @@
-Copyright (c) 2012 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/alecthomas/template/README.md

@@ -1,25 +0,0 @@
-# Go's `text/template` package with newline elision
-
-This is a fork of Go 1.4's [text/template](http://golang.org/pkg/text/template/) package with one addition: a backslash immediately after a closing delimiter will delete all subsequent newlines until a non-newline.
-
-eg.
-
-```
-{{if true}}\
-hello
-{{end}}\
-```
-
-Will result in:
-
-```
-hello\n
-```
-
-Rather than:
-
-```
-\n
-hello\n
-\n
-```

vendor/github.com/alecthomas/template/doc.go

@@ -1,406 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-/*
-Package template implements data-driven templates for generating textual output.
-
-To generate HTML output, see package html/template, which has the same interface
-as this package but automatically secures HTML output against certain attacks.
-
-Templates are executed by applying them to a data structure. Annotations in the
-template refer to elements of the data structure (typically a field of a struct
-or a key in a map) to control execution and derive values to be displayed.
-Execution of the template walks the structure and sets the cursor, represented
-by a period '.' and called "dot", to the value at the current location in the
-structure as execution proceeds.
-
-The input text for a template is UTF-8-encoded text in any format.
-"Actions"--data evaluations or control structures--are delimited by
-"{{" and "}}"; all text outside actions is copied to the output unchanged.
-Actions may not span newlines, although comments can.
-
-Once parsed, a template may be executed safely in parallel.
-
-Here is a trivial example that prints "17 items are made of wool".
-
-	type Inventory struct {
-		Material string
-		Count    uint
-	}
-	sweaters := Inventory{"wool", 17}
-	tmpl, err := template.New("test").Parse("{{.Count}} items are made of {{.Material}}")
-	if err != nil { panic(err) }
-	err = tmpl.Execute(os.Stdout, sweaters)
-	if err != nil { panic(err) }
-
-More intricate examples appear below.
-
-Actions
-
-Here is the list of actions. "Arguments" and "pipelines" are evaluations of
-data, defined in detail below.
-
-*/
-//	{{/* a comment */}}
-//		A comment; discarded. May contain newlines.
-//		Comments do not nest and must start and end at the
-//		delimiters, as shown here.
-/*
-
-	{{pipeline}}
-		The default textual representation of the value of the pipeline
-		is copied to the output.
-
-	{{if pipeline}} T1 {{end}}
-		If the value of the pipeline is empty, no output is generated;
-		otherwise, T1 is executed.  The empty values are false, 0, any
-		nil pointer or interface value, and any array, slice, map, or
-		string of length zero.
-		Dot is unaffected.
-
-	{{if pipeline}} T1 {{else}} T0 {{end}}
-		If the value of the pipeline is empty, T0 is executed;
-		otherwise, T1 is executed.  Dot is unaffected.
-
-	{{if pipeline}} T1 {{else if pipeline}} T0 {{end}}
-		To simplify the appearance of if-else chains, the else action
-		of an if may include another if directly; the effect is exactly
-		the same as writing
-			{{if pipeline}} T1 {{else}}{{if pipeline}} T0 {{end}}{{end}}
-
-	{{range pipeline}} T1 {{end}}
-		The value of the pipeline must be an array, slice, map, or channel.
-		If the value of the pipeline has length zero, nothing is output;
-		otherwise, dot is set to the successive elements of the array,
-		slice, or map and T1 is executed. If the value is a map and the
-		keys are of basic type with a defined order ("comparable"), the
-		elements will be visited in sorted key order.
-
-	{{range pipeline}} T1 {{else}} T0 {{end}}
-		The value of the pipeline must be an array, slice, map, or channel.
-		If the value of the pipeline has length zero, dot is unaffected and
-		T0 is executed; otherwise, dot is set to the successive elements
-		of the array, slice, or map and T1 is executed.
-
-	{{template "name"}}
-		The template with the specified name is executed with nil data.
-
-	{{template "name" pipeline}}
-		The template with the specified name is executed with dot set
-		to the value of the pipeline.
-
-	{{with pipeline}} T1 {{end}}
-		If the value of the pipeline is empty, no output is generated;
-		otherwise, dot is set to the value of the pipeline and T1 is
-		executed.
-
-	{{with pipeline}} T1 {{else}} T0 {{end}}
-		If the value of the pipeline is empty, dot is unaffected and T0
-		is executed; otherwise, dot is set to the value of the pipeline
-		and T1 is executed.
-
-Arguments
-
-An argument is a simple value, denoted by one of the following.
-
-	- A boolean, string, character, integer, floating-point, imaginary
-	  or complex constant in Go syntax. These behave like Go's untyped
-	  constants, although raw strings may not span newlines.
-	- The keyword nil, representing an untyped Go nil.
-	- The character '.' (period):
-		.
-	  The result is the value of dot.
-	- A variable name, which is a (possibly empty) alphanumeric string
-	  preceded by a dollar sign, such as
-		$piOver2
-	  or
-		$
-	  The result is the value of the variable.
-	  Variables are described below.
-	- The name of a field of the data, which must be a struct, preceded
-	  by a period, such as
-		.Field
-	  The result is the value of the field. Field invocations may be
-	  chained:
-	    .Field1.Field2
-	  Fields can also be evaluated on variables, including chaining:
-	    $x.Field1.Field2
-	- The name of a key of the data, which must be a map, preceded
-	  by a period, such as
-		.Key
-	  The result is the map element value indexed by the key.
-	  Key invocations may be chained and combined with fields to any
-	  depth:
-	    .Field1.Key1.Field2.Key2
-	  Although the key must be an alphanumeric identifier, unlike with
-	  field names they do not need to start with an upper case letter.
-	  Keys can also be evaluated on variables, including chaining:
-	    $x.key1.key2
-	- The name of a niladic method of the data, preceded by a period,
-	  such as
-		.Method
-	  The result is the value of invoking the method with dot as the
-	  receiver, dot.Method(). Such a method must have one return value (of
-	  any type) or two return values, the second of which is an error.
-	  If it has two and the returned error is non-nil, execution terminates
-	  and an error is returned to the caller as the value of Execute.
-	  Method invocations may be chained and combined with fields and keys
-	  to any depth:
-	    .Field1.Key1.Method1.Field2.Key2.Method2
-	  Methods can also be evaluated on variables, including chaining:
-	    $x.Method1.Field
-	- The name of a niladic function, such as
-		fun
-	  The result is the value of invoking the function, fun(). The return
-	  types and values behave as in methods. Functions and function
-	  names are described below.
-	- A parenthesized instance of one the above, for grouping. The result
-	  may be accessed by a field or map key invocation.
-		print (.F1 arg1) (.F2 arg2)
-		(.StructValuedMethod "arg").Field
-
-Arguments may evaluate to any type; if they are pointers the implementation
-automatically indirects to the base type when required.
-If an evaluation yields a function value, such as a function-valued
-field of a struct, the function is not invoked automatically, but it
-can be used as a truth value for an if action and the like. To invoke
-it, use the call function, defined below.
-
-A pipeline is a possibly chained sequence of "commands". A command is a simple
-value (argument) or a function or method call, possibly with multiple arguments:
-
-	Argument
-		The result is the value of evaluating the argument.
-	.Method [Argument...]
-		The method can be alone or the last element of a chain but,
-		unlike methods in the middle of a chain, it can take arguments.
-		The result is the value of calling the method with the
-		arguments:
-			dot.Method(Argument1, etc.)
-	functionName [Argument...]
-		The result is the value of calling the function associated
-		with the name:
-			function(Argument1, etc.)
-		Functions and function names are described below.
-
-Pipelines
-
-A pipeline may be "chained" by separating a sequence of commands with pipeline
-characters '|'. In a chained pipeline, the result of the each command is
-passed as the last argument of the following command. The output of the final
-command in the pipeline is the value of the pipeline.
-
-The output of a command will be either one value or two values, the second of
-which has type error. If that second value is present and evaluates to
-non-nil, execution terminates and the error is returned to the caller of
-Execute.
-
-Variables
-
-A pipeline inside an action may initialize a variable to capture the result.
-The initialization has syntax
-
-	$variable := pipeline
-
-where $variable is the name of the variable. An action that declares a
-variable produces no output.
-
-If a "range" action initializes a variable, the variable is set to the
-successive elements of the iteration.  Also, a "range" may declare two
-variables, separated by a comma:
-
-	range $index, $element := pipeline
-
-in which case $index and $element are set to the successive values of the
-array/slice index or map key and element, respectively.  Note that if there is
-only one variable, it is assigned the element; this is opposite to the
-convention in Go range clauses.
-
-A variable's scope extends to the "end" action of the control structure ("if",
-"with", or "range") in which it is declared, or to the end of the template if
-there is no such control structure.  A template invocation does not inherit
-variables from the point of its invocation.
-
-When execution begins, $ is set to the data argument passed to Execute, that is,
-to the starting value of dot.
-
-Examples
-
-Here are some example one-line templates demonstrating pipelines and variables.
-All produce the quoted word "output":
-
-	{{"\"output\""}}
-		A string constant.
-	{{`"output"`}}
-		A raw string constant.
-	{{printf "%q" "output"}}
-		A function call.
-	{{"output" | printf "%q"}}
-		A function call whose final argument comes from the previous
-		command.
-	{{printf "%q" (print "out" "put")}}
-		A parenthesized argument.
-	{{"put" | printf "%s%s" "out" | printf "%q"}}
-		A more elaborate call.
-	{{"output" | printf "%s" | printf "%q"}}
-		A longer chain.
-	{{with "output"}}{{printf "%q" .}}{{end}}
-		A with action using dot.
-	{{with $x := "output" | printf "%q"}}{{$x}}{{end}}
-		A with action that creates and uses a variable.
-	{{with $x := "output"}}{{printf "%q" $x}}{{end}}
-		A with action that uses the variable in another action.
-	{{with $x := "output"}}{{$x | printf "%q"}}{{end}}
-		The same, but pipelined.
-
-Functions
-
-During execution functions are found in two function maps: first in the
-template, then in the global function map. By default, no functions are defined
-in the template but the Funcs method can be used to add them.
-
-Predefined global functions are named as follows.
-
-	and
-		Returns the boolean AND of its arguments by returning the
-		first empty argument or the last argument, that is,
-		"and x y" behaves as "if x then y else x". All the
-		arguments are evaluated.
-	call
-		Returns the result of calling the first argument, which
-		must be a function, with the remaining arguments as parameters.
-		Thus "call .X.Y 1 2" is, in Go notation, dot.X.Y(1, 2) where
-		Y is a func-valued field, map entry, or the like.
-		The first argument must be the result of an evaluation
-		that yields a value of function type (as distinct from
-		a predefined function such as print). The function must
-		return either one or two result values, the second of which
-		is of type error. If the arguments don't match the function
-		or the returned error value is non-nil, execution stops.
-	html
-		Returns the escaped HTML equivalent of the textual
-		representation of its arguments.
-	index
-		Returns the result of indexing its first argument by the
-		following arguments. Thus "index x 1 2 3" is, in Go syntax,
-		x[1][2][3]. Each indexed item must be a map, slice, or array.
-	js
-		Returns the escaped JavaScript equivalent of the textual
-		representation of its arguments.
-	len
-		Returns the integer length of its argument.
-	not
-		Returns the boolean negation of its single argument.
-	or
-		Returns the boolean OR of its arguments by returning the
-		first non-empty argument or the last argument, that is,
-		"or x y" behaves as "if x then x else y". All the
-		arguments are evaluated.
-	print
-		An alias for fmt.Sprint
-	printf
-		An alias for fmt.Sprintf
-	println
-		An alias for fmt.Sprintln
-	urlquery
-		Returns the escaped value of the textual representation of
-		its arguments in a form suitable for embedding in a URL query.
-
-The boolean functions take any zero value to be false and a non-zero
-value to be true.
-
-There is also a set of binary comparison operators defined as
-functions:
-
-	eq
-		Returns the boolean truth of arg1 == arg2
-	ne
-		Returns the boolean truth of arg1 != arg2
-	lt
-		Returns the boolean truth of arg1 < arg2
-	le
-		Returns the boolean truth of arg1 <= arg2
-	gt
-		Returns the boolean truth of arg1 > arg2
-	ge
-		Returns the boolean truth of arg1 >= arg2
-
-For simpler multi-way equality tests, eq (only) accepts two or more
-arguments and compares the second and subsequent to the first,
-returning in effect
-
-	arg1==arg2 || arg1==arg3 || arg1==arg4 ...
-
-(Unlike with || in Go, however, eq is a function call and all the
-arguments will be evaluated.)
-
-The comparison functions work on basic types only (or named basic
-types, such as "type Celsius float32"). They implement the Go rules
-for comparison of values, except that size and exact type are
-ignored, so any integer value, signed or unsigned, may be compared
-with any other integer value. (The arithmetic value is compared,
-not the bit pattern, so all negative integers are less than all
-unsigned integers.) However, as usual, one may not compare an int
-with a float32 and so on.
-
-Associated templates
-
-Each template is named by a string specified when it is created. Also, each
-template is associated with zero or more other templates that it may invoke by
-name; such associations are transitive and form a name space of templates.
-
-A template may use a template invocation to instantiate another associated
-template; see the explanation of the "template" action above. The name must be
-that of a template associated with the template that contains the invocation.
-
-Nested template definitions
-
-When parsing a template, another template may be defined and associated with the
-template being parsed. Template definitions must appear at the top level of the
-template, much like global variables in a Go program.
-
-The syntax of such definitions is to surround each template declaration with a
-"define" and "end" action.
-
-The define action names the template being created by providing a string
-constant. Here is a simple example:
-
-	`{{define "T1"}}ONE{{end}}
-	{{define "T2"}}TWO{{end}}
-	{{define "T3"}}{{template "T1"}} {{template "T2"}}{{end}}
-	{{template "T3"}}`
-
-This defines two templates, T1 and T2, and a third T3 that invokes the other two
-when it is executed. Finally it invokes T3. If executed this template will
-produce the text
-
-	ONE TWO
-
-By construction, a template may reside in only one association. If it's
-necessary to have a template addressable from multiple associations, the
-template definition must be parsed multiple times to create distinct *Template
-values, or must be copied with the Clone or AddParseTree method.
-
-Parse may be called multiple times to assemble the various associated templates;
-see the ParseFiles and ParseGlob functions and methods for simple ways to parse
-related templates stored in files.
-
-A template may be executed directly or through ExecuteTemplate, which executes
-an associated template identified by name. To invoke our example above, we
-might write,
-
-	err := tmpl.Execute(os.Stdout, "no data needed")
-	if err != nil {
-		log.Fatalf("execution failed: %s", err)
-	}
-
-or to invoke a particular template explicitly by name,
-
-	err := tmpl.ExecuteTemplate(os.Stdout, "T2", "no data needed")
-	if err != nil {
-		log.Fatalf("execution failed: %s", err)
-	}
-
-*/
-package template

vendor/github.com/alecthomas/template/exec.go

@@ -1,845 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package template
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-	"reflect"
-	"runtime"
-	"sort"
-	"strings"
-
-	"github.com/alecthomas/template/parse"
-)
-
-// state represents the state of an execution. It's not part of the
-// template so that multiple executions of the same template
-// can execute in parallel.
-type state struct {
-	tmpl *Template
-	wr   io.Writer
-	node parse.Node // current node, for errors
-	vars []variable // push-down stack of variable values.
-}
-
-// variable holds the dynamic value of a variable such as $, $x etc.
-type variable struct {
-	name  string
-	value reflect.Value
-}
-
-// push pushes a new variable on the stack.
-func (s *state) push(name string, value reflect.Value) {
-	s.vars = append(s.vars, variable{name, value})
-}
-
-// mark returns the length of the variable stack.
-func (s *state) mark() int {
-	return len(s.vars)
-}
-
-// pop pops the variable stack up to the mark.
-func (s *state) pop(mark int) {
-	s.vars = s.vars[0:mark]
-}
-
-// setVar overwrites the top-nth variable on the stack. Used by range iterations.
-func (s *state) setVar(n int, value reflect.Value) {
-	s.vars[len(s.vars)-n].value = value
-}
-
-// varValue returns the value of the named variable.
-func (s *state) varValue(name string) reflect.Value {
-	for i := s.mark() - 1; i >= 0; i-- {
-		if s.vars[i].name == name {
-			return s.vars[i].value
-		}
-	}
-	s.errorf("undefined variable: %s", name)
-	return zero
-}
-
-var zero reflect.Value
-
-// at marks the state to be on node n, for error reporting.
-func (s *state) at(node parse.Node) {
-	s.node = node
-}
-
-// doublePercent returns the string with %'s replaced by %%, if necessary,
-// so it can be used safely inside a Printf format string.
-func doublePercent(str string) string {
-	if strings.Contains(str, "%") {
-		str = strings.Replace(str, "%", "%%", -1)
-	}
-	return str
-}
-
-// errorf formats the error and terminates processing.
-func (s *state) errorf(format string, args ...interface{}) {
-	name := doublePercent(s.tmpl.Name())
-	if s.node == nil {
-		format = fmt.Sprintf("template: %s: %s", name, format)
-	} else {
-		location, context := s.tmpl.ErrorContext(s.node)
-		format = fmt.Sprintf("template: %s: executing %q at <%s>: %s", location, name, doublePercent(context), format)
-	}
-	panic(fmt.Errorf(format, args...))
-}
-
-// errRecover is the handler that turns panics into returns from the top
-// level of Parse.
-func errRecover(errp *error) {
-	e := recover()
-	if e != nil {
-		switch err := e.(type) {
-		case runtime.Error:
-			panic(e)
-		case error:
-			*errp = err
-		default:
-			panic(e)
-		}
-	}
-}
-
-// ExecuteTemplate applies the template associated with t that has the given name
-// to the specified data object and writes the output to wr.
-// If an error occurs executing the template or writing its output,
-// execution stops, but partial results may already have been written to
-// the output writer.
-// A template may be executed safely in parallel.
-func (t *Template) ExecuteTemplate(wr io.Writer, name string, data interface{}) error {
-	tmpl := t.tmpl[name]
-	if tmpl == nil {
-		return fmt.Errorf("template: no template %q associated with template %q", name, t.name)
-	}
-	return tmpl.Execute(wr, data)
-}
-
-// Execute applies a parsed template to the specified data object,
-// and writes the output to wr.
-// If an error occurs executing the template or writing its output,
-// execution stops, but partial results may already have been written to
-// the output writer.
-// A template may be executed safely in parallel.
-func (t *Template) Execute(wr io.Writer, data interface{}) (err error) {
-	defer errRecover(&err)
-	value := reflect.ValueOf(data)
-	state := &state{
-		tmpl: t,
-		wr:   wr,
-		vars: []variable{{"$", value}},
-	}
-	t.init()
-	if t.Tree == nil || t.Root == nil {
-		var b bytes.Buffer
-		for name, tmpl := range t.tmpl {
-			if tmpl.Tree == nil || tmpl.Root == nil {
-				continue
-			}
-			if b.Len() > 0 {
-				b.WriteString(", ")
-			}
-			fmt.Fprintf(&b, "%q", name)
-		}
-		var s string
-		if b.Len() > 0 {
-			s = "; defined templates are: " + b.String()
-		}
-		state.errorf("%q is an incomplete or empty template%s", t.Name(), s)
-	}
-	state.walk(value, t.Root)
-	return
-}
-
-// Walk functions step through the major pieces of the template structure,
-// generating output as they go.
-func (s *state) walk(dot reflect.Value, node parse.Node) {
-	s.at(node)
-	switch node := node.(type) {
-	case *parse.ActionNode:
-		// Do not pop variables so they persist until next end.
-		// Also, if the action declares variables, don't print the result.
-		val := s.evalPipeline(dot, node.Pipe)
-		if len(node.Pipe.Decl) == 0 {
-			s.printValue(node, val)
-		}
-	case *parse.IfNode:
-		s.walkIfOrWith(parse.NodeIf, dot, node.Pipe, node.List, node.ElseList)
-	case *parse.ListNode:
-		for _, node := range node.Nodes {
-			s.walk(dot, node)
-		}
-	case *parse.RangeNode:
-		s.walkRange(dot, node)
-	case *parse.TemplateNode:
-		s.walkTemplate(dot, node)
-	case *parse.TextNode:
-		if _, err := s.wr.Write(node.Text); err != nil {
-			s.errorf("%s", err)
-		}
-	case *parse.WithNode:
-		s.walkIfOrWith(parse.NodeWith, dot, node.Pipe, node.List, node.ElseList)
-	default:
-		s.errorf("unknown node: %s", node)
-	}
-}
-
-// walkIfOrWith walks an 'if' or 'with' node. The two control structures
-// are identical in behavior except that 'with' sets dot.
-func (s *state) walkIfOrWith(typ parse.NodeType, dot reflect.Value, pipe *parse.PipeNode, list, elseList *parse.ListNode) {
-	defer s.pop(s.mark())
-	val := s.evalPipeline(dot, pipe)
-	truth, ok := isTrue(val)
-	if !ok {
-		s.errorf("if/with can't use %v", val)
-	}
-	if truth {
-		if typ == parse.NodeWith {
-			s.walk(val, list)
-		} else {
-			s.walk(dot, list)
-		}
-	} else if elseList != nil {
-		s.walk(dot, elseList)
-	}
-}
-
-// isTrue reports whether the value is 'true', in the sense of not the zero of its type,
-// and whether the value has a meaningful truth value.
-func isTrue(val reflect.Value) (truth, ok bool) {
-	if !val.IsValid() {
-		// Something like var x interface{}, never set. It's a form of nil.
-		return false, true
-	}
-	switch val.Kind() {
-	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
-		truth = val.Len() > 0
-	case reflect.Bool:
-		truth = val.Bool()
-	case reflect.Complex64, reflect.Complex128:
-		truth = val.Complex() != 0
-	case reflect.Chan, reflect.Func, reflect.Ptr, reflect.Interface:
-		truth = !val.IsNil()
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		truth = val.Int() != 0
-	case reflect.Float32, reflect.Float64:
-		truth = val.Float() != 0
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		truth = val.Uint() != 0
-	case reflect.Struct:
-		truth = true // Struct values are always true.
-	default:
-		return
-	}
-	return truth, true
-}
-
-func (s *state) walkRange(dot reflect.Value, r *parse.RangeNode) {
-	s.at(r)
-	defer s.pop(s.mark())
-	val, _ := indirect(s.evalPipeline(dot, r.Pipe))
-	// mark top of stack before any variables in the body are pushed.
-	mark := s.mark()
-	oneIteration := func(index, elem reflect.Value) {
-		// Set top var (lexically the second if there are two) to the element.
-		if len(r.Pipe.Decl) > 0 {
-			s.setVar(1, elem)
-		}
-		// Set next var (lexically the first if there are two) to the index.
-		if len(r.Pipe.Decl) > 1 {
-			s.setVar(2, index)
-		}
-		s.walk(elem, r.List)
-		s.pop(mark)
-	}
-	switch val.Kind() {
-	case reflect.Array, reflect.Slice:
-		if val.Len() == 0 {
-			break
-		}
-		for i := 0; i < val.Len(); i++ {
-			oneIteration(reflect.ValueOf(i), val.Index(i))
-		}
-		return
-	case reflect.Map:
-		if val.Len() == 0 {
-			break
-		}
-		for _, key := range sortKeys(val.MapKeys()) {
-			oneIteration(key, val.MapIndex(key))
-		}
-		return
-	case reflect.Chan:
-		if val.IsNil() {
-			break
-		}
-		i := 0
-		for ; ; i++ {
-			elem, ok := val.Recv()
-			if !ok {
-				break
-			}
-			oneIteration(reflect.ValueOf(i), elem)
-		}
-		if i == 0 {
-			break
-		}
-		return
-	case reflect.Invalid:
-		break // An invalid value is likely a nil map, etc. and acts like an empty map.
-	default:
-		s.errorf("range can't iterate over %v", val)
-	}
-	if r.ElseList != nil {
-		s.walk(dot, r.ElseList)
-	}
-}
-
-func (s *state) walkTemplate(dot reflect.Value, t *parse.TemplateNode) {
-	s.at(t)
-	tmpl := s.tmpl.tmpl[t.Name]
-	if tmpl == nil {
-		s.errorf("template %q not defined", t.Name)
-	}
-	// Variables declared by the pipeline persist.
-	dot = s.evalPipeline(dot, t.Pipe)
-	newState := *s
-	newState.tmpl = tmpl
-	// No dynamic scoping: template invocations inherit no variables.
-	newState.vars = []variable{{"$", dot}}
-	newState.walk(dot, tmpl.Root)
-}
-
-// Eval functions evaluate pipelines, commands, and their elements and extract
-// values from the data structure by examining fields, calling methods, and so on.
-// The printing of those values happens only through walk functions.
-
-// evalPipeline returns the value acquired by evaluating a pipeline. If the
-// pipeline has a variable declaration, the variable will be pushed on the
-// stack. Callers should therefore pop the stack after they are finished
-// executing commands depending on the pipeline value.
-func (s *state) evalPipeline(dot reflect.Value, pipe *parse.PipeNode) (value reflect.Value) {
-	if pipe == nil {
-		return
-	}
-	s.at(pipe)
-	for _, cmd := range pipe.Cmds {
-		value = s.evalCommand(dot, cmd, value) // previous value is this one's final arg.
-		// If the object has type interface{}, dig down one level to the thing inside.
-		if value.Kind() == reflect.Interface && value.Type().NumMethod() == 0 {
-			value = reflect.ValueOf(value.Interface()) // lovely!
-		}
-	}
-	for _, variable := range pipe.Decl {
-		s.push(variable.Ident[0], value)
-	}
-	return value
-}
-
-func (s *state) notAFunction(args []parse.Node, final reflect.Value) {
-	if len(args) > 1 || final.IsValid() {
-		s.errorf("can't give argument to non-function %s", args[0])
-	}
-}
-
-func (s *state) evalCommand(dot reflect.Value, cmd *parse.CommandNode, final reflect.Value) reflect.Value {
-	firstWord := cmd.Args[0]
-	switch n := firstWord.(type) {
-	case *parse.FieldNode:
-		return s.evalFieldNode(dot, n, cmd.Args, final)
-	case *parse.ChainNode:
-		return s.evalChainNode(dot, n, cmd.Args, final)
-	case *parse.IdentifierNode:
-		// Must be a function.
-		return s.evalFunction(dot, n, cmd, cmd.Args, final)
-	case *parse.PipeNode:
-		// Parenthesized pipeline. The arguments are all inside the pipeline; final is ignored.
-		return s.evalPipeline(dot, n)
-	case *parse.VariableNode:
-		return s.evalVariableNode(dot, n, cmd.Args, final)
-	}
-	s.at(firstWord)
-	s.notAFunction(cmd.Args, final)
-	switch word := firstWord.(type) {
-	case *parse.BoolNode:
-		return reflect.ValueOf(word.True)
-	case *parse.DotNode:
-		return dot
-	case *parse.NilNode:
-		s.errorf("nil is not a command")
-	case *parse.NumberNode:
-		return s.idealConstant(word)
-	case *parse.StringNode:
-		return reflect.ValueOf(word.Text)
-	}
-	s.errorf("can't evaluate command %q", firstWord)
-	panic("not reached")
-}
-
-// idealConstant is called to return the value of a number in a context where
-// we don't know the type. In that case, the syntax of the number tells us
-// its type, and we use Go rules to resolve.  Note there is no such thing as
-// a uint ideal constant in this situation - the value must be of int type.
-func (s *state) idealConstant(constant *parse.NumberNode) reflect.Value {
-	// These are ideal constants but we don't know the type
-	// and we have no context.  (If it was a method argument,
-	// we'd know what we need.) The syntax guides us to some extent.
-	s.at(constant)
-	switch {
-	case constant.IsComplex:
-		return reflect.ValueOf(constant.Complex128) // incontrovertible.
-	case constant.IsFloat && !isHexConstant(constant.Text) && strings.IndexAny(constant.Text, ".eE") >= 0:
-		return reflect.ValueOf(constant.Float64)
-	case constant.IsInt:
-		n := int(constant.Int64)
-		if int64(n) != constant.Int64 {
-			s.errorf("%s overflows int", constant.Text)
-		}
-		return reflect.ValueOf(n)
-	case constant.IsUint:
-		s.errorf("%s overflows int", constant.Text)
-	}
-	return zero
-}
-
-func isHexConstant(s string) bool {
-	return len(s) > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X')
-}
-
-func (s *state) evalFieldNode(dot reflect.Value, field *parse.FieldNode, args []parse.Node, final reflect.Value) reflect.Value {
-	s.at(field)
-	return s.evalFieldChain(dot, dot, field, field.Ident, args, final)
-}
-
-func (s *state) evalChainNode(dot reflect.Value, chain *parse.ChainNode, args []parse.Node, final reflect.Value) reflect.Value {
-	s.at(chain)
-	// (pipe).Field1.Field2 has pipe as .Node, fields as .Field. Eval the pipeline, then the fields.
-	pipe := s.evalArg(dot, nil, chain.Node)
-	if len(chain.Field) == 0 {
-		s.errorf("internal error: no fields in evalChainNode")
-	}
-	return s.evalFieldChain(dot, pipe, chain, chain.Field, args, final)
-}
-
-func (s *state) evalVariableNode(dot reflect.Value, variable *parse.VariableNode, args []parse.Node, final reflect.Value) reflect.Value {
-	// $x.Field has $x as the first ident, Field as the second. Eval the var, then the fields.
-	s.at(variable)
-	value := s.varValue(variable.Ident[0])
-	if len(variable.Ident) == 1 {
-		s.notAFunction(args, final)
-		return value
-	}
-	return s.evalFieldChain(dot, value, variable, variable.Ident[1:], args, final)
-}
-
-// evalFieldChain evaluates .X.Y.Z possibly followed by arguments.
-// dot is the environment in which to evaluate arguments, while
-// receiver is the value being walked along the chain.
-func (s *state) evalFieldChain(dot, receiver reflect.Value, node parse.Node, ident []string, args []parse.Node, final reflect.Value) reflect.Value {
-	n := len(ident)
-	for i := 0; i < n-1; i++ {
-		receiver = s.evalField(dot, ident[i], node, nil, zero, receiver)
-	}
-	// Now if it's a method, it gets the arguments.
-	return s.evalField(dot, ident[n-1], node, args, final, receiver)
-}
-
-func (s *state) evalFunction(dot reflect.Value, node *parse.IdentifierNode, cmd parse.Node, args []parse.Node, final reflect.Value) reflect.Value {
-	s.at(node)
-	name := node.Ident
-	function, ok := findFunction(name, s.tmpl)
-	if !ok {
-		s.errorf("%q is not a defined function", name)
-	}
-	return s.evalCall(dot, function, cmd, name, args, final)
-}
-
-// evalField evaluates an expression like (.Field) or (.Field arg1 arg2).
-// The 'final' argument represents the return value from the preceding
-// value of the pipeline, if any.
-func (s *state) evalField(dot reflect.Value, fieldName string, node parse.Node, args []parse.Node, final, receiver reflect.Value) reflect.Value {
-	if !receiver.IsValid() {
-		return zero
-	}
-	typ := receiver.Type()
-	receiver, _ = indirect(receiver)
-	// Unless it's an interface, need to get to a value of type *T to guarantee
-	// we see all methods of T and *T.
-	ptr := receiver
-	if ptr.Kind() != reflect.Interface && ptr.CanAddr() {
-		ptr = ptr.Addr()
-	}
-	if method := ptr.MethodByName(fieldName); method.IsValid() {
-		return s.evalCall(dot, method, node, fieldName, args, final)
-	}
-	hasArgs := len(args) > 1 || final.IsValid()
-	// It's not a method; must be a field of a struct or an element of a map. The receiver must not be nil.
-	receiver, isNil := indirect(receiver)
-	if isNil {
-		s.errorf("nil pointer evaluating %s.%s", typ, fieldName)
-	}
-	switch receiver.Kind() {
-	case reflect.Struct:
-		tField, ok := receiver.Type().FieldByName(fieldName)
-		if ok {
-			field := receiver.FieldByIndex(tField.Index)
-			if tField.PkgPath != "" { // field is unexported
-				s.errorf("%s is an unexported field of struct type %s", fieldName, typ)
-			}
-			// If it's a function, we must call it.
-			if hasArgs {
-				s.errorf("%s has arguments but cannot be invoked as function", fieldName)
-			}
-			return field
-		}
-		s.errorf("%s is not a field of struct type %s", fieldName, typ)
-	case reflect.Map:
-		// If it's a map, attempt to use the field name as a key.
-		nameVal := reflect.ValueOf(fieldName)
-		if nameVal.Type().AssignableTo(receiver.Type().Key()) {
-			if hasArgs {
-				s.errorf("%s is not a method but has arguments", fieldName)
-			}
-			return receiver.MapIndex(nameVal)
-		}
-	}
-	s.errorf("can't evaluate field %s in type %s", fieldName, typ)
-	panic("not reached")
-}
-
-var (
-	errorType       = reflect.TypeOf((*error)(nil)).Elem()
-	fmtStringerType = reflect.TypeOf((*fmt.Stringer)(nil)).Elem()
-)
-
-// evalCall executes a function or method call. If it's a method, fun already has the receiver bound, so
-// it looks just like a function call.  The arg list, if non-nil, includes (in the manner of the shell), arg[0]
-// as the function itself.
-func (s *state) evalCall(dot, fun reflect.Value, node parse.Node, name string, args []parse.Node, final reflect.Value) reflect.Value {
-	if args != nil {
-		args = args[1:] // Zeroth arg is function name/node; not passed to function.
-	}
-	typ := fun.Type()
-	numIn := len(args)
-	if final.IsValid() {
-		numIn++
-	}
-	numFixed := len(args)
-	if typ.IsVariadic() {
-		numFixed = typ.NumIn() - 1 // last arg is the variadic one.
-		if numIn < numFixed {
-			s.errorf("wrong number of args for %s: want at least %d got %d", name, typ.NumIn()-1, len(args))
-		}
-	} else if numIn < typ.NumIn()-1 || !typ.IsVariadic() && numIn != typ.NumIn() {
-		s.errorf("wrong number of args for %s: want %d got %d", name, typ.NumIn(), len(args))
-	}
-	if !goodFunc(typ) {
-		// TODO: This could still be a confusing error; maybe goodFunc should provide info.
-		s.errorf("can't call method/function %q with %d results", name, typ.NumOut())
-	}
-	// Build the arg list.
-	argv := make([]reflect.Value, numIn)
-	// Args must be evaluated. Fixed args first.
-	i := 0
-	for ; i < numFixed && i < len(args); i++ {
-		argv[i] = s.evalArg(dot, typ.In(i), args[i])
-	}
-	// Now the ... args.
-	if typ.IsVariadic() {
-		argType := typ.In(typ.NumIn() - 1).Elem() // Argument is a slice.
-		for ; i < len(args); i++ {
-			argv[i] = s.evalArg(dot, argType, args[i])
-		}
-	}
-	// Add final value if necessary.
-	if final.IsValid() {
-		t := typ.In(typ.NumIn() - 1)
-		if typ.IsVariadic() {
-			t = t.Elem()
-		}
-		argv[i] = s.validateType(final, t)
-	}
-	result := fun.Call(argv)
-	// If we have an error that is not nil, stop execution and return that error to the caller.
-	if len(result) == 2 && !result[1].IsNil() {
-		s.at(node)
-		s.errorf("error calling %s: %s", name, result[1].Interface().(error))
-	}
-	return result[0]
-}
-
-// canBeNil reports whether an untyped nil can be assigned to the type. See reflect.Zero.
-func canBeNil(typ reflect.Type) bool {
-	switch typ.Kind() {
-	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
-		return true
-	}
-	return false
-}
-
-// validateType guarantees that the value is valid and assignable to the type.
-func (s *state) validateType(value reflect.Value, typ reflect.Type) reflect.Value {
-	if !value.IsValid() {
-		if typ == nil || canBeNil(typ) {
-			// An untyped nil interface{}. Accept as a proper nil value.
-			return reflect.Zero(typ)
-		}
-		s.errorf("invalid value; expected %s", typ)
-	}
-	if typ != nil && !value.Type().AssignableTo(typ) {
-		if value.Kind() == reflect.Interface && !value.IsNil() {
-			value = value.Elem()
-			if value.Type().AssignableTo(typ) {
-				return value
-			}
-			// fallthrough
-		}
-		// Does one dereference or indirection work? We could do more, as we
-		// do with method receivers, but that gets messy and method receivers
-		// are much more constrained, so it makes more sense there than here.
-		// Besides, one is almost always all you need.
-		switch {
-		case value.Kind() == reflect.Ptr && value.Type().Elem().AssignableTo(typ):
-			value = value.Elem()
-			if !value.IsValid() {
-				s.errorf("dereference of nil pointer of type %s", typ)
-			}
-		case reflect.PtrTo(value.Type()).AssignableTo(typ) && value.CanAddr():
-			value = value.Addr()
-		default:
-			s.errorf("wrong type for value; expected %s; got %s", typ, value.Type())
-		}
-	}
-	return value
-}
-
-func (s *state) evalArg(dot reflect.Value, typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	switch arg := n.(type) {
-	case *parse.DotNode:
-		return s.validateType(dot, typ)
-	case *parse.NilNode:
-		if canBeNil(typ) {
-			return reflect.Zero(typ)
-		}
-		s.errorf("cannot assign nil to %s", typ)
-	case *parse.FieldNode:
-		return s.validateType(s.evalFieldNode(dot, arg, []parse.Node{n}, zero), typ)
-	case *parse.VariableNode:
-		return s.validateType(s.evalVariableNode(dot, arg, nil, zero), typ)
-	case *parse.PipeNode:
-		return s.validateType(s.evalPipeline(dot, arg), typ)
-	case *parse.IdentifierNode:
-		return s.evalFunction(dot, arg, arg, nil, zero)
-	case *parse.ChainNode:
-		return s.validateType(s.evalChainNode(dot, arg, nil, zero), typ)
-	}
-	switch typ.Kind() {
-	case reflect.Bool:
-		return s.evalBool(typ, n)
-	case reflect.Complex64, reflect.Complex128:
-		return s.evalComplex(typ, n)
-	case reflect.Float32, reflect.Float64:
-		return s.evalFloat(typ, n)
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return s.evalInteger(typ, n)
-	case reflect.Interface:
-		if typ.NumMethod() == 0 {
-			return s.evalEmptyInterface(dot, n)
-		}
-	case reflect.String:
-		return s.evalString(typ, n)
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		return s.evalUnsignedInteger(typ, n)
-	}
-	s.errorf("can't handle %s for arg of type %s", n, typ)
-	panic("not reached")
-}
-
-func (s *state) evalBool(typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	if n, ok := n.(*parse.BoolNode); ok {
-		value := reflect.New(typ).Elem()
-		value.SetBool(n.True)
-		return value
-	}
-	s.errorf("expected bool; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalString(typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	if n, ok := n.(*parse.StringNode); ok {
-		value := reflect.New(typ).Elem()
-		value.SetString(n.Text)
-		return value
-	}
-	s.errorf("expected string; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalInteger(typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	if n, ok := n.(*parse.NumberNode); ok && n.IsInt {
-		value := reflect.New(typ).Elem()
-		value.SetInt(n.Int64)
-		return value
-	}
-	s.errorf("expected integer; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalUnsignedInteger(typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	if n, ok := n.(*parse.NumberNode); ok && n.IsUint {
-		value := reflect.New(typ).Elem()
-		value.SetUint(n.Uint64)
-		return value
-	}
-	s.errorf("expected unsigned integer; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalFloat(typ reflect.Type, n parse.Node) reflect.Value {
-	s.at(n)
-	if n, ok := n.(*parse.NumberNode); ok && n.IsFloat {
-		value := reflect.New(typ).Elem()
-		value.SetFloat(n.Float64)
-		return value
-	}
-	s.errorf("expected float; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalComplex(typ reflect.Type, n parse.Node) reflect.Value {
-	if n, ok := n.(*parse.NumberNode); ok && n.IsComplex {
-		value := reflect.New(typ).Elem()
-		value.SetComplex(n.Complex128)
-		return value
-	}
-	s.errorf("expected complex; found %s", n)
-	panic("not reached")
-}
-
-func (s *state) evalEmptyInterface(dot reflect.Value, n parse.Node) reflect.Value {
-	s.at(n)
-	switch n := n.(type) {
-	case *parse.BoolNode:
-		return reflect.ValueOf(n.True)
-	case *parse.DotNode:
-		return dot
-	case *parse.FieldNode:
-		return s.evalFieldNode(dot, n, nil, zero)
-	case *parse.IdentifierNode:
-		return s.evalFunction(dot, n, n, nil, zero)
-	case *parse.NilNode:
-		// NilNode is handled in evalArg, the only place that calls here.
-		s.errorf("evalEmptyInterface: nil (can't happen)")
-	case *parse.NumberNode:
-		return s.idealConstant(n)
-	case *parse.StringNode:
-		return reflect.ValueOf(n.Text)
-	case *parse.VariableNode:
-		return s.evalVariableNode(dot, n, nil, zero)
-	case *parse.PipeNode:
-		return s.evalPipeline(dot, n)
-	}
-	s.errorf("can't handle assignment of %s to empty interface argument", n)
-	panic("not reached")
-}
-
-// indirect returns the item at the end of indirection, and a bool to indicate if it's nil.
-// We indirect through pointers and empty interfaces (only) because
-// non-empty interfaces have methods we might need.
-func indirect(v reflect.Value) (rv reflect.Value, isNil bool) {
-	for ; v.Kind() == reflect.Ptr || v.Kind() == reflect.Interface; v = v.Elem() {
-		if v.IsNil() {
-			return v, true
-		}
-		if v.Kind() == reflect.Interface && v.NumMethod() > 0 {
-			break
-		}
-	}
-	return v, false
-}
-
-// printValue writes the textual representation of the value to the output of
-// the template.
-func (s *state) printValue(n parse.Node, v reflect.Value) {
-	s.at(n)
-	iface, ok := printableValue(v)
-	if !ok {
-		s.errorf("can't print %s of type %s", n, v.Type())
-	}
-	fmt.Fprint(s.wr, iface)
-}
-
-// printableValue returns the, possibly indirected, interface value inside v that
-// is best for a call to formatted printer.
-func printableValue(v reflect.Value) (interface{}, bool) {
-	if v.Kind() == reflect.Ptr {
-		v, _ = indirect(v) // fmt.Fprint handles nil.
-	}
-	if !v.IsValid() {
-		return "<no value>", true
-	}
-
-	if !v.Type().Implements(errorType) && !v.Type().Implements(fmtStringerType) {
-		if v.CanAddr() && (reflect.PtrTo(v.Type()).Implements(errorType) || reflect.PtrTo(v.Type()).Implements(fmtStringerType)) {
-			v = v.Addr()
-		} else {
-			switch v.Kind() {
-			case reflect.Chan, reflect.Func:
-				return nil, false
-			}
-		}
-	}
-	return v.Interface(), true
-}
-
-// Types to help sort the keys in a map for reproducible output.
-
-type rvs []reflect.Value
-
-func (x rvs) Len() int      { return len(x) }
-func (x rvs) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
-
-type rvInts struct{ rvs }
-
-func (x rvInts) Less(i, j int) bool { return x.rvs[i].Int() < x.rvs[j].Int() }
-
-type rvUints struct{ rvs }
-
-func (x rvUints) Less(i, j int) bool { return x.rvs[i].Uint() < x.rvs[j].Uint() }
-
-type rvFloats struct{ rvs }
-
-func (x rvFloats) Less(i, j int) bool { return x.rvs[i].Float() < x.rvs[j].Float() }
-
-type rvStrings struct{ rvs }
-
-func (x rvStrings) Less(i, j int) bool { return x.rvs[i].String() < x.rvs[j].String() }
-
-// sortKeys sorts (if it can) the slice of reflect.Values, which is a slice of map keys.
-func sortKeys(v []reflect.Value) []reflect.Value {
-	if len(v) <= 1 {
-		return v
-	}
-	switch v[0].Kind() {
-	case reflect.Float32, reflect.Float64:
-		sort.Sort(rvFloats{v})
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		sort.Sort(rvInts{v})
-	case reflect.String:
-		sort.Sort(rvStrings{v})
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		sort.Sort(rvUints{v})
-	}
-	return v
-}

vendor/github.com/alecthomas/template/funcs.go

@@ -1,598 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package template
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"net/url"
-	"reflect"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-)
-
-// FuncMap is the type of the map defining the mapping from names to functions.
-// Each function must have either a single return value, or two return values of
-// which the second has type error. In that case, if the second (error)
-// return value evaluates to non-nil during execution, execution terminates and
-// Execute returns that error.
-type FuncMap map[string]interface{}
-
-var builtins = FuncMap{
-	"and":      and,
-	"call":     call,
-	"html":     HTMLEscaper,
-	"index":    index,
-	"js":       JSEscaper,
-	"len":      length,
-	"not":      not,
-	"or":       or,
-	"print":    fmt.Sprint,
-	"printf":   fmt.Sprintf,
-	"println":  fmt.Sprintln,
-	"urlquery": URLQueryEscaper,
-
-	// Comparisons
-	"eq": eq, // ==
-	"ge": ge, // >=
-	"gt": gt, // >
-	"le": le, // <=
-	"lt": lt, // <
-	"ne": ne, // !=
-}
-
-var builtinFuncs = createValueFuncs(builtins)
-
-// createValueFuncs turns a FuncMap into a map[string]reflect.Value
-func createValueFuncs(funcMap FuncMap) map[string]reflect.Value {
-	m := make(map[string]reflect.Value)
-	addValueFuncs(m, funcMap)
-	return m
-}
-
-// addValueFuncs adds to values the functions in funcs, converting them to reflect.Values.
-func addValueFuncs(out map[string]reflect.Value, in FuncMap) {
-	for name, fn := range in {
-		v := reflect.ValueOf(fn)
-		if v.Kind() != reflect.Func {
-			panic("value for " + name + " not a function")
-		}
-		if !goodFunc(v.Type()) {
-			panic(fmt.Errorf("can't install method/function %q with %d results", name, v.Type().NumOut()))
-		}
-		out[name] = v
-	}
-}
-
-// addFuncs adds to values the functions in funcs. It does no checking of the input -
-// call addValueFuncs first.
-func addFuncs(out, in FuncMap) {
-	for name, fn := range in {
-		out[name] = fn
-	}
-}
-
-// goodFunc checks that the function or method has the right result signature.
-func goodFunc(typ reflect.Type) bool {
-	// We allow functions with 1 result or 2 results where the second is an error.
-	switch {
-	case typ.NumOut() == 1:
-		return true
-	case typ.NumOut() == 2 && typ.Out(1) == errorType:
-		return true
-	}
-	return false
-}
-
-// findFunction looks for a function in the template, and global map.
-func findFunction(name string, tmpl *Template) (reflect.Value, bool) {
-	if tmpl != nil && tmpl.common != nil {
-		if fn := tmpl.execFuncs[name]; fn.IsValid() {
-			return fn, true
-		}
-	}
-	if fn := builtinFuncs[name]; fn.IsValid() {
-		return fn, true
-	}
-	return reflect.Value{}, false
-}
-
-// Indexing.
-
-// index returns the result of indexing its first argument by the following
-// arguments.  Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each
-// indexed item must be a map, slice, or array.
-func index(item interface{}, indices ...interface{}) (interface{}, error) {
-	v := reflect.ValueOf(item)
-	for _, i := range indices {
-		index := reflect.ValueOf(i)
-		var isNil bool
-		if v, isNil = indirect(v); isNil {
-			return nil, fmt.Errorf("index of nil pointer")
-		}
-		switch v.Kind() {
-		case reflect.Array, reflect.Slice, reflect.String:
-			var x int64
-			switch index.Kind() {
-			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-				x = index.Int()
-			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-				x = int64(index.Uint())
-			default:
-				return nil, fmt.Errorf("cannot index slice/array with type %s", index.Type())
-			}
-			if x < 0 || x >= int64(v.Len()) {
-				return nil, fmt.Errorf("index out of range: %d", x)
-			}
-			v = v.Index(int(x))
-		case reflect.Map:
-			if !index.IsValid() {
-				index = reflect.Zero(v.Type().Key())
-			}
-			if !index.Type().AssignableTo(v.Type().Key()) {
-				return nil, fmt.Errorf("%s is not index type for %s", index.Type(), v.Type())
-			}
-			if x := v.MapIndex(index); x.IsValid() {
-				v = x
-			} else {
-				v = reflect.Zero(v.Type().Elem())
-			}
-		default:
-			return nil, fmt.Errorf("can't index item of type %s", v.Type())
-		}
-	}
-	return v.Interface(), nil
-}
-
-// Length
-
-// length returns the length of the item, with an error if it has no defined length.
-func length(item interface{}) (int, error) {
-	v, isNil := indirect(reflect.ValueOf(item))
-	if isNil {
-		return 0, fmt.Errorf("len of nil pointer")
-	}
-	switch v.Kind() {
-	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice, reflect.String:
-		return v.Len(), nil
-	}
-	return 0, fmt.Errorf("len of type %s", v.Type())
-}
-
-// Function invocation
-
-// call returns the result of evaluating the first argument as a function.
-// The function must return 1 result, or 2 results, the second of which is an error.
-func call(fn interface{}, args ...interface{}) (interface{}, error) {
-	v := reflect.ValueOf(fn)
-	typ := v.Type()
-	if typ.Kind() != reflect.Func {
-		return nil, fmt.Errorf("non-function of type %s", typ)
-	}
-	if !goodFunc(typ) {
-		return nil, fmt.Errorf("function called with %d args; should be 1 or 2", typ.NumOut())
-	}
-	numIn := typ.NumIn()
-	var dddType reflect.Type
-	if typ.IsVariadic() {
-		if len(args) < numIn-1 {
-			return nil, fmt.Errorf("wrong number of args: got %d want at least %d", len(args), numIn-1)
-		}
-		dddType = typ.In(numIn - 1).Elem()
-	} else {
-		if len(args) != numIn {
-			return nil, fmt.Errorf("wrong number of args: got %d want %d", len(args), numIn)
-		}
-	}
-	argv := make([]reflect.Value, len(args))
-	for i, arg := range args {
-		value := reflect.ValueOf(arg)
-		// Compute the expected type. Clumsy because of variadics.
-		var argType reflect.Type
-		if !typ.IsVariadic() || i < numIn-1 {
-			argType = typ.In(i)
-		} else {
-			argType = dddType
-		}
-		if !value.IsValid() && canBeNil(argType) {
-			value = reflect.Zero(argType)
-		}
-		if !value.Type().AssignableTo(argType) {
-			return nil, fmt.Errorf("arg %d has type %s; should be %s", i, value.Type(), argType)
-		}
-		argv[i] = value
-	}
-	result := v.Call(argv)
-	if len(result) == 2 && !result[1].IsNil() {
-		return result[0].Interface(), result[1].Interface().(error)
-	}
-	return result[0].Interface(), nil
-}
-
-// Boolean logic.
-
-func truth(a interface{}) bool {
-	t, _ := isTrue(reflect.ValueOf(a))
-	return t
-}
-
-// and computes the Boolean AND of its arguments, returning
-// the first false argument it encounters, or the last argument.
-func and(arg0 interface{}, args ...interface{}) interface{} {
-	if !truth(arg0) {
-		return arg0
-	}
-	for i := range args {
-		arg0 = args[i]
-		if !truth(arg0) {
-			break
-		}
-	}
-	return arg0
-}
-
-// or computes the Boolean OR of its arguments, returning
-// the first true argument it encounters, or the last argument.
-func or(arg0 interface{}, args ...interface{}) interface{} {
-	if truth(arg0) {
-		return arg0
-	}
-	for i := range args {
-		arg0 = args[i]
-		if truth(arg0) {
-			break
-		}
-	}
-	return arg0
-}
-
-// not returns the Boolean negation of its argument.
-func not(arg interface{}) (truth bool) {
-	truth, _ = isTrue(reflect.ValueOf(arg))
-	return !truth
-}
-
-// Comparison.
-
-// TODO: Perhaps allow comparison between signed and unsigned integers.
-
-var (
-	errBadComparisonType = errors.New("invalid type for comparison")
-	errBadComparison     = errors.New("incompatible types for comparison")
-	errNoComparison      = errors.New("missing argument for comparison")
-)
-
-type kind int
-
-const (
-	invalidKind kind = iota
-	boolKind
-	complexKind
-	intKind
-	floatKind
-	integerKind
-	stringKind
-	uintKind
-)
-
-func basicKind(v reflect.Value) (kind, error) {
-	switch v.Kind() {
-	case reflect.Bool:
-		return boolKind, nil
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return intKind, nil
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		return uintKind, nil
-	case reflect.Float32, reflect.Float64:
-		return floatKind, nil
-	case reflect.Complex64, reflect.Complex128:
-		return complexKind, nil
-	case reflect.String:
-		return stringKind, nil
-	}
-	return invalidKind, errBadComparisonType
-}
-
-// eq evaluates the comparison a == b || a == c || ...
-func eq(arg1 interface{}, arg2 ...interface{}) (bool, error) {
-	v1 := reflect.ValueOf(arg1)
-	k1, err := basicKind(v1)
-	if err != nil {
-		return false, err
-	}
-	if len(arg2) == 0 {
-		return false, errNoComparison
-	}
-	for _, arg := range arg2 {
-		v2 := reflect.ValueOf(arg)
-		k2, err := basicKind(v2)
-		if err != nil {
-			return false, err
-		}
-		truth := false
-		if k1 != k2 {
-			// Special case: Can compare integer values regardless of type's sign.
-			switch {
-			case k1 == intKind && k2 == uintKind:
-				truth = v1.Int() >= 0 && uint64(v1.Int()) == v2.Uint()
-			case k1 == uintKind && k2 == intKind:
-				truth = v2.Int() >= 0 && v1.Uint() == uint64(v2.Int())
-			default:
-				return false, errBadComparison
-			}
-		} else {
-			switch k1 {
-			case boolKind:
-				truth = v1.Bool() == v2.Bool()
-			case complexKind:
-				truth = v1.Complex() == v2.Complex()
-			case floatKind:
-				truth = v1.Float() == v2.Float()
-			case intKind:
-				truth = v1.Int() == v2.Int()
-			case stringKind:
-				truth = v1.String() == v2.String()
-			case uintKind:
-				truth = v1.Uint() == v2.Uint()
-			default:
-				panic("invalid kind")
-			}
-		}
-		if truth {
-			return true, nil
-		}
-	}
-	return false, nil
-}
-
-// ne evaluates the comparison a != b.
-func ne(arg1, arg2 interface{}) (bool, error) {
-	// != is the inverse of ==.
-	equal, err := eq(arg1, arg2)
-	return !equal, err
-}
-
-// lt evaluates the comparison a < b.
-func lt(arg1, arg2 interface{}) (bool, error) {
-	v1 := reflect.ValueOf(arg1)
-	k1, err := basicKind(v1)
-	if err != nil {
-		return false, err
-	}
-	v2 := reflect.ValueOf(arg2)
-	k2, err := basicKind(v2)
-	if err != nil {
-		return false, err
-	}
-	truth := false
-	if k1 != k2 {
-		// Special case: Can compare integer values regardless of type's sign.
-		switch {
-		case k1 == intKind && k2 == uintKind:
-			truth = v1.Int() < 0 || uint64(v1.Int()) < v2.Uint()
-		case k1 == uintKind && k2 == intKind:
-			truth = v2.Int() >= 0 && v1.Uint() < uint64(v2.Int())
-		default:
-			return false, errBadComparison
-		}
-	} else {
-		switch k1 {
-		case boolKind, complexKind:
-			return false, errBadComparisonType
-		case floatKind:
-			truth = v1.Float() < v2.Float()
-		case intKind:
-			truth = v1.Int() < v2.Int()
-		case stringKind:
-			truth = v1.String() < v2.String()
-		case uintKind:
-			truth = v1.Uint() < v2.Uint()
-		default:
-			panic("invalid kind")
-		}
-	}
-	return truth, nil
-}
-
-// le evaluates the comparison <= b.
-func le(arg1, arg2 interface{}) (bool, error) {
-	// <= is < or ==.
-	lessThan, err := lt(arg1, arg2)
-	if lessThan || err != nil {
-		return lessThan, err
-	}
-	return eq(arg1, arg2)
-}
-
-// gt evaluates the comparison a > b.
-func gt(arg1, arg2 interface{}) (bool, error) {
-	// > is the inverse of <=.
-	lessOrEqual, err := le(arg1, arg2)
-	if err != nil {
-		return false, err
-	}
-	return !lessOrEqual, nil
-}
-
-// ge evaluates the comparison a >= b.
-func ge(arg1, arg2 interface{}) (bool, error) {
-	// >= is the inverse of <.
-	lessThan, err := lt(arg1, arg2)
-	if err != nil {
-		return false, err
-	}
-	return !lessThan, nil
-}
-
-// HTML escaping.
-
-var (
-	htmlQuot = []byte("&#34;") // shorter than "&quot;"
-	htmlApos = []byte("&#39;") // shorter than "&apos;" and apos was not in HTML until HTML5
-	htmlAmp  = []byte("&amp;")
-	htmlLt   = []byte("&lt;")
-	htmlGt   = []byte("&gt;")
-)
-
-// HTMLEscape writes to w the escaped HTML equivalent of the plain text data b.
-func HTMLEscape(w io.Writer, b []byte) {
-	last := 0
-	for i, c := range b {
-		var html []byte
-		switch c {
-		case '"':
-			html = htmlQuot
-		case '\'':
-			html = htmlApos
-		case '&':
-			html = htmlAmp
-		case '<':
-			html = htmlLt
-		case '>':
-			html = htmlGt
-		default:
-			continue
-		}
-		w.Write(b[last:i])
-		w.Write(html)
-		last = i + 1
-	}
-	w.Write(b[last:])
-}
-
-// HTMLEscapeString returns the escaped HTML equivalent of the plain text data s.
-func HTMLEscapeString(s string) string {
-	// Avoid allocation if we can.
-	if strings.IndexAny(s, `'"&<>`) < 0 {
-		return s
-	}
-	var b bytes.Buffer
-	HTMLEscape(&b, []byte(s))
-	return b.String()
-}
-
-// HTMLEscaper returns the escaped HTML equivalent of the textual
-// representation of its arguments.
-func HTMLEscaper(args ...interface{}) string {
-	return HTMLEscapeString(evalArgs(args))
-}
-
-// JavaScript escaping.
-
-var (
-	jsLowUni = []byte(`\u00`)
-	hex      = []byte("0123456789ABCDEF")
-
-	jsBackslash = []byte(`\\`)
-	jsApos      = []byte(`\'`)
-	jsQuot      = []byte(`\"`)
-	jsLt        = []byte(`\x3C`)
-	jsGt        = []byte(`\x3E`)
-)
-
-// JSEscape writes to w the escaped JavaScript equivalent of the plain text data b.
-func JSEscape(w io.Writer, b []byte) {
-	last := 0
-	for i := 0; i < len(b); i++ {
-		c := b[i]
-
-		if !jsIsSpecial(rune(c)) {
-			// fast path: nothing to do
-			continue
-		}
-		w.Write(b[last:i])
-
-		if c < utf8.RuneSelf {
-			// Quotes, slashes and angle brackets get quoted.
-			// Control characters get written as \u00XX.
-			switch c {
-			case '\\':
-				w.Write(jsBackslash)
-			case '\'':
-				w.Write(jsApos)
-			case '"':
-				w.Write(jsQuot)
-			case '<':
-				w.Write(jsLt)
-			case '>':
-				w.Write(jsGt)
-			default:
-				w.Write(jsLowUni)
-				t, b := c>>4, c&0x0f
-				w.Write(hex[t : t+1])
-				w.Write(hex[b : b+1])
-			}
-		} else {
-			// Unicode rune.
-			r, size := utf8.DecodeRune(b[i:])
-			if unicode.IsPrint(r) {
-				w.Write(b[i : i+size])
-			} else {
-				fmt.Fprintf(w, "\\u%04X", r)
-			}
-			i += size - 1
-		}
-		last = i + 1
-	}
-	w.Write(b[last:])
-}
-
-// JSEscapeString returns the escaped JavaScript equivalent of the plain text data s.
-func JSEscapeString(s string) string {
-	// Avoid allocation if we can.
-	if strings.IndexFunc(s, jsIsSpecial) < 0 {
-		return s
-	}
-	var b bytes.Buffer
-	JSEscape(&b, []byte(s))
-	return b.String()
-}
-
-func jsIsSpecial(r rune) bool {
-	switch r {
-	case '\\', '\'', '"', '<', '>':
-		return true
-	}
-	return r < ' ' || utf8.RuneSelf <= r
-}
-
-// JSEscaper returns the escaped JavaScript equivalent of the textual
-// representation of its arguments.
-func JSEscaper(args ...interface{}) string {
-	return JSEscapeString(evalArgs(args))
-}
-
-// URLQueryEscaper returns the escaped value of the textual representation of
-// its arguments in a form suitable for embedding in a URL query.
-func URLQueryEscaper(args ...interface{}) string {
-	return url.QueryEscape(evalArgs(args))
-}
-
-// evalArgs formats the list of arguments into a string. It is therefore equivalent to
-//	fmt.Sprint(args...)
-// except that each argument is indirected (if a pointer), as required,
-// using the same rules as the default string evaluation during template
-// execution.
-func evalArgs(args []interface{}) string {
-	ok := false
-	var s string
-	// Fast path for simple common case.
-	if len(args) == 1 {
-		s, ok = args[0].(string)
-	}
-	if !ok {
-		for i, arg := range args {
-			a, ok := printableValue(reflect.ValueOf(arg))
-			if ok {
-				args[i] = a
-			} // else left fmt do its thing
-		}
-		s = fmt.Sprint(args...)
-	}
-	return s
-}

vendor/github.com/alecthomas/template/helper.go

@@ -1,108 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Helper functions to make constructing templates easier.
-
-package template
-
-import (
-	"fmt"
-	"io/ioutil"
-	"path/filepath"
-)
-
-// Functions and methods to parse templates.
-
-// Must is a helper that wraps a call to a function returning (*Template, error)
-// and panics if the error is non-nil. It is intended for use in variable
-// initializations such as
-//	var t = template.Must(template.New("name").Parse("text"))
-func Must(t *Template, err error) *Template {
-	if err != nil {
-		panic(err)
-	}
-	return t
-}
-
-// ParseFiles creates a new Template and parses the template definitions from
-// the named files. The returned template's name will have the (base) name and
-// (parsed) contents of the first file. There must be at least one file.
-// If an error occurs, parsing stops and the returned *Template is nil.
-func ParseFiles(filenames ...string) (*Template, error) {
-	return parseFiles(nil, filenames...)
-}
-
-// ParseFiles parses the named files and associates the resulting templates with
-// t. If an error occurs, parsing stops and the returned template is nil;
-// otherwise it is t. There must be at least one file.
-func (t *Template) ParseFiles(filenames ...string) (*Template, error) {
-	return parseFiles(t, filenames...)
-}
-
-// parseFiles is the helper for the method and function. If the argument
-// template is nil, it is created from the first file.
-func parseFiles(t *Template, filenames ...string) (*Template, error) {
-	if len(filenames) == 0 {
-		// Not really a problem, but be consistent.
-		return nil, fmt.Errorf("template: no files named in call to ParseFiles")
-	}
-	for _, filename := range filenames {
-		b, err := ioutil.ReadFile(filename)
-		if err != nil {
-			return nil, err
-		}
-		s := string(b)
-		name := filepath.Base(filename)
-		// First template becomes return value if not already defined,
-		// and we use that one for subsequent New calls to associate
-		// all the templates together. Also, if this file has the same name
-		// as t, this file becomes the contents of t, so
-		//  t, err := New(name).Funcs(xxx).ParseFiles(name)
-		// works. Otherwise we create a new template associated with t.
-		var tmpl *Template
-		if t == nil {
-			t = New(name)
-		}
-		if name == t.Name() {
-			tmpl = t
-		} else {
-			tmpl = t.New(name)
-		}
-		_, err = tmpl.Parse(s)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return t, nil
-}
-
-// ParseGlob creates a new Template and parses the template definitions from the
-// files identified by the pattern, which must match at least one file. The
-// returned template will have the (base) name and (parsed) contents of the
-// first file matched by the pattern. ParseGlob is equivalent to calling
-// ParseFiles with the list of files matched by the pattern.
-func ParseGlob(pattern string) (*Template, error) {
-	return parseGlob(nil, pattern)
-}
-
-// ParseGlob parses the template definitions in the files identified by the
-// pattern and associates the resulting templates with t. The pattern is
-// processed by filepath.Glob and must match at least one file. ParseGlob is
-// equivalent to calling t.ParseFiles with the list of files matched by the
-// pattern.
-func (t *Template) ParseGlob(pattern string) (*Template, error) {
-	return parseGlob(t, pattern)
-}
-
-// parseGlob is the implementation of the function and method ParseGlob.
-func parseGlob(t *Template, pattern string) (*Template, error) {
-	filenames, err := filepath.Glob(pattern)
-	if err != nil {
-		return nil, err
-	}
-	if len(filenames) == 0 {
-		return nil, fmt.Errorf("template: pattern matches no files: %#q", pattern)
-	}
-	return parseFiles(t, filenames...)
-}

vendor/github.com/alecthomas/template/parse/lex.go

@@ -1,556 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package parse
-
-import (
-	"fmt"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-)
-
-// item represents a token or text string returned from the scanner.
-type item struct {
-	typ itemType // The type of this item.
-	pos Pos      // The starting position, in bytes, of this item in the input string.
-	val string   // The value of this item.
-}
-
-func (i item) String() string {
-	switch {
-	case i.typ == itemEOF:
-		return "EOF"
-	case i.typ == itemError:
-		return i.val
-	case i.typ > itemKeyword:
-		return fmt.Sprintf("<%s>", i.val)
-	case len(i.val) > 10:
-		return fmt.Sprintf("%.10q...", i.val)
-	}
-	return fmt.Sprintf("%q", i.val)
-}
-
-// itemType identifies the type of lex items.
-type itemType int
-
-const (
-	itemError        itemType = iota // error occurred; value is text of error
-	itemBool                         // boolean constant
-	itemChar                         // printable ASCII character; grab bag for comma etc.
-	itemCharConstant                 // character constant
-	itemComplex                      // complex constant (1+2i); imaginary is just a number
-	itemColonEquals                  // colon-equals (':=') introducing a declaration
-	itemEOF
-	itemField        // alphanumeric identifier starting with '.'
-	itemIdentifier   // alphanumeric identifier not starting with '.'
-	itemLeftDelim    // left action delimiter
-	itemLeftParen    // '(' inside action
-	itemNumber       // simple number, including imaginary
-	itemPipe         // pipe symbol
-	itemRawString    // raw quoted string (includes quotes)
-	itemRightDelim   // right action delimiter
-	itemElideNewline // elide newline after right delim
-	itemRightParen   // ')' inside action
-	itemSpace        // run of spaces separating arguments
-	itemString       // quoted string (includes quotes)
-	itemText         // plain text
-	itemVariable     // variable starting with '$', such as '$' or  '$1' or '$hello'
-	// Keywords appear after all the rest.
-	itemKeyword  // used only to delimit the keywords
-	itemDot      // the cursor, spelled '.'
-	itemDefine   // define keyword
-	itemElse     // else keyword
-	itemEnd      // end keyword
-	itemIf       // if keyword
-	itemNil      // the untyped nil constant, easiest to treat as a keyword
-	itemRange    // range keyword
-	itemTemplate // template keyword
-	itemWith     // with keyword
-)
-
-var key = map[string]itemType{
-	".":        itemDot,
-	"define":   itemDefine,
-	"else":     itemElse,
-	"end":      itemEnd,
-	"if":       itemIf,
-	"range":    itemRange,
-	"nil":      itemNil,
-	"template": itemTemplate,
-	"with":     itemWith,
-}
-
-const eof = -1
-
-// stateFn represents the state of the scanner as a function that returns the next state.
-type stateFn func(*lexer) stateFn
-
-// lexer holds the state of the scanner.
-type lexer struct {
-	name       string    // the name of the input; used only for error reports
-	input      string    // the string being scanned
-	leftDelim  string    // start of action
-	rightDelim string    // end of action
-	state      stateFn   // the next lexing function to enter
-	pos        Pos       // current position in the input
-	start      Pos       // start position of this item
-	width      Pos       // width of last rune read from input
-	lastPos    Pos       // position of most recent item returned by nextItem
-	items      chan item // channel of scanned items
-	parenDepth int       // nesting depth of ( ) exprs
-}
-
-// next returns the next rune in the input.
-func (l *lexer) next() rune {
-	if int(l.pos) >= len(l.input) {
-		l.width = 0
-		return eof
-	}
-	r, w := utf8.DecodeRuneInString(l.input[l.pos:])
-	l.width = Pos(w)
-	l.pos += l.width
-	return r
-}
-
-// peek returns but does not consume the next rune in the input.
-func (l *lexer) peek() rune {
-	r := l.next()
-	l.backup()
-	return r
-}
-
-// backup steps back one rune. Can only be called once per call of next.
-func (l *lexer) backup() {
-	l.pos -= l.width
-}
-
-// emit passes an item back to the client.
-func (l *lexer) emit(t itemType) {
-	l.items <- item{t, l.start, l.input[l.start:l.pos]}
-	l.start = l.pos
-}
-
-// ignore skips over the pending input before this point.
-func (l *lexer) ignore() {
-	l.start = l.pos
-}
-
-// accept consumes the next rune if it's from the valid set.
-func (l *lexer) accept(valid string) bool {
-	if strings.IndexRune(valid, l.next()) >= 0 {
-		return true
-	}
-	l.backup()
-	return false
-}
-
-// acceptRun consumes a run of runes from the valid set.
-func (l *lexer) acceptRun(valid string) {
-	for strings.IndexRune(valid, l.next()) >= 0 {
-	}
-	l.backup()
-}
-
-// lineNumber reports which line we're on, based on the position of
-// the previous item returned by nextItem. Doing it this way
-// means we don't have to worry about peek double counting.
-func (l *lexer) lineNumber() int {
-	return 1 + strings.Count(l.input[:l.lastPos], "\n")
-}
-
-// errorf returns an error token and terminates the scan by passing
-// back a nil pointer that will be the next state, terminating l.nextItem.
-func (l *lexer) errorf(format string, args ...interface{}) stateFn {
-	l.items <- item{itemError, l.start, fmt.Sprintf(format, args...)}
-	return nil
-}
-
-// nextItem returns the next item from the input.
-func (l *lexer) nextItem() item {
-	item := <-l.items
-	l.lastPos = item.pos
-	return item
-}
-
-// lex creates a new scanner for the input string.
-func lex(name, input, left, right string) *lexer {
-	if left == "" {
-		left = leftDelim
-	}
-	if right == "" {
-		right = rightDelim
-	}
-	l := &lexer{
-		name:       name,
-		input:      input,
-		leftDelim:  left,
-		rightDelim: right,
-		items:      make(chan item),
-	}
-	go l.run()
-	return l
-}
-
-// run runs the state machine for the lexer.
-func (l *lexer) run() {
-	for l.state = lexText; l.state != nil; {
-		l.state = l.state(l)
-	}
-}
-
-// state functions
-
-const (
-	leftDelim    = "{{"
-	rightDelim   = "}}"
-	leftComment  = "/*"
-	rightComment = "*/"
-)
-
-// lexText scans until an opening action delimiter, "{{".
-func lexText(l *lexer) stateFn {
-	for {
-		if strings.HasPrefix(l.input[l.pos:], l.leftDelim) {
-			if l.pos > l.start {
-				l.emit(itemText)
-			}
-			return lexLeftDelim
-		}
-		if l.next() == eof {
-			break
-		}
-	}
-	// Correctly reached EOF.
-	if l.pos > l.start {
-		l.emit(itemText)
-	}
-	l.emit(itemEOF)
-	return nil
-}
-
-// lexLeftDelim scans the left delimiter, which is known to be present.
-func lexLeftDelim(l *lexer) stateFn {
-	l.pos += Pos(len(l.leftDelim))
-	if strings.HasPrefix(l.input[l.pos:], leftComment) {
-		return lexComment
-	}
-	l.emit(itemLeftDelim)
-	l.parenDepth = 0
-	return lexInsideAction
-}
-
-// lexComment scans a comment. The left comment marker is known to be present.
-func lexComment(l *lexer) stateFn {
-	l.pos += Pos(len(leftComment))
-	i := strings.Index(l.input[l.pos:], rightComment)
-	if i < 0 {
-		return l.errorf("unclosed comment")
-	}
-	l.pos += Pos(i + len(rightComment))
-	if !strings.HasPrefix(l.input[l.pos:], l.rightDelim) {
-		return l.errorf("comment ends before closing delimiter")
-
-	}
-	l.pos += Pos(len(l.rightDelim))
-	l.ignore()
-	return lexText
-}
-
-// lexRightDelim scans the right delimiter, which is known to be present.
-func lexRightDelim(l *lexer) stateFn {
-	l.pos += Pos(len(l.rightDelim))
-	l.emit(itemRightDelim)
-	if l.peek() == '\\' {
-		l.pos++
-		l.emit(itemElideNewline)
-	}
-	return lexText
-}
-
-// lexInsideAction scans the elements inside action delimiters.
-func lexInsideAction(l *lexer) stateFn {
-	// Either number, quoted string, or identifier.
-	// Spaces separate arguments; runs of spaces turn into itemSpace.
-	// Pipe symbols separate and are emitted.
-	if strings.HasPrefix(l.input[l.pos:], l.rightDelim+"\\") || strings.HasPrefix(l.input[l.pos:], l.rightDelim) {
-		if l.parenDepth == 0 {
-			return lexRightDelim
-		}
-		return l.errorf("unclosed left paren")
-	}
-	switch r := l.next(); {
-	case r == eof || isEndOfLine(r):
-		return l.errorf("unclosed action")
-	case isSpace(r):
-		return lexSpace
-	case r == ':':
-		if l.next() != '=' {
-			return l.errorf("expected :=")
-		}
-		l.emit(itemColonEquals)
-	case r == '|':
-		l.emit(itemPipe)
-	case r == '"':
-		return lexQuote
-	case r == '`':
-		return lexRawQuote
-	case r == '$':
-		return lexVariable
-	case r == '\'':
-		return lexChar
-	case r == '.':
-		// special look-ahead for ".field" so we don't break l.backup().
-		if l.pos < Pos(len(l.input)) {
-			r := l.input[l.pos]
-			if r < '0' || '9' < r {
-				return lexField
-			}
-		}
-		fallthrough // '.' can start a number.
-	case r == '+' || r == '-' || ('0' <= r && r <= '9'):
-		l.backup()
-		return lexNumber
-	case isAlphaNumeric(r):
-		l.backup()
-		return lexIdentifier
-	case r == '(':
-		l.emit(itemLeftParen)
-		l.parenDepth++
-		return lexInsideAction
-	case r == ')':
-		l.emit(itemRightParen)
-		l.parenDepth--
-		if l.parenDepth < 0 {
-			return l.errorf("unexpected right paren %#U", r)
-		}
-		return lexInsideAction
-	case r <= unicode.MaxASCII && unicode.IsPrint(r):
-		l.emit(itemChar)
-		return lexInsideAction
-	default:
-		return l.errorf("unrecognized character in action: %#U", r)
-	}
-	return lexInsideAction
-}
-
-// lexSpace scans a run of space characters.
-// One space has already been seen.
-func lexSpace(l *lexer) stateFn {
-	for isSpace(l.peek()) {
-		l.next()
-	}
-	l.emit(itemSpace)
-	return lexInsideAction
-}
-
-// lexIdentifier scans an alphanumeric.
-func lexIdentifier(l *lexer) stateFn {
-Loop:
-	for {
-		switch r := l.next(); {
-		case isAlphaNumeric(r):
-			// absorb.
-		default:
-			l.backup()
-			word := l.input[l.start:l.pos]
-			if !l.atTerminator() {
-				return l.errorf("bad character %#U", r)
-			}
-			switch {
-			case key[word] > itemKeyword:
-				l.emit(key[word])
-			case word[0] == '.':
-				l.emit(itemField)
-			case word == "true", word == "false":
-				l.emit(itemBool)
-			default:
-				l.emit(itemIdentifier)
-			}
-			break Loop
-		}
-	}
-	return lexInsideAction
-}
-
-// lexField scans a field: .Alphanumeric.
-// The . has been scanned.
-func lexField(l *lexer) stateFn {
-	return lexFieldOrVariable(l, itemField)
-}
-
-// lexVariable scans a Variable: $Alphanumeric.
-// The $ has been scanned.
-func lexVariable(l *lexer) stateFn {
-	if l.atTerminator() { // Nothing interesting follows -> "$".
-		l.emit(itemVariable)
-		return lexInsideAction
-	}
-	return lexFieldOrVariable(l, itemVariable)
-}
-
-// lexVariable scans a field or variable: [.$]Alphanumeric.
-// The . or $ has been scanned.
-func lexFieldOrVariable(l *lexer, typ itemType) stateFn {
-	if l.atTerminator() { // Nothing interesting follows -> "." or "$".
-		if typ == itemVariable {
-			l.emit(itemVariable)
-		} else {
-			l.emit(itemDot)
-		}
-		return lexInsideAction
-	}
-	var r rune
-	for {
-		r = l.next()
-		if !isAlphaNumeric(r) {
-			l.backup()
-			break
-		}
-	}
-	if !l.atTerminator() {
-		return l.errorf("bad character %#U", r)
-	}
-	l.emit(typ)
-	return lexInsideAction
-}
-
-// atTerminator reports whether the input is at valid termination character to
-// appear after an identifier. Breaks .X.Y into two pieces. Also catches cases
-// like "$x+2" not being acceptable without a space, in case we decide one
-// day to implement arithmetic.
-func (l *lexer) atTerminator() bool {
-	r := l.peek()
-	if isSpace(r) || isEndOfLine(r) {
-		return true
-	}
-	switch r {
-	case eof, '.', ',', '|', ':', ')', '(':
-		return true
-	}
-	// Does r start the delimiter? This can be ambiguous (with delim=="//", $x/2 will
-	// succeed but should fail) but only in extremely rare cases caused by willfully
-	// bad choice of delimiter.
-	if rd, _ := utf8.DecodeRuneInString(l.rightDelim); rd == r {
-		return true
-	}
-	return false
-}
-
-// lexChar scans a character constant. The initial quote is already
-// scanned. Syntax checking is done by the parser.
-func lexChar(l *lexer) stateFn {
-Loop:
-	for {
-		switch l.next() {
-		case '\\':
-			if r := l.next(); r != eof && r != '\n' {
-				break
-			}
-			fallthrough
-		case eof, '\n':
-			return l.errorf("unterminated character constant")
-		case '\'':
-			break Loop
-		}
-	}
-	l.emit(itemCharConstant)
-	return lexInsideAction
-}
-
-// lexNumber scans a number: decimal, octal, hex, float, or imaginary. This
-// isn't a perfect number scanner - for instance it accepts "." and "0x0.2"
-// and "089" - but when it's wrong the input is invalid and the parser (via
-// strconv) will notice.
-func lexNumber(l *lexer) stateFn {
-	if !l.scanNumber() {
-		return l.errorf("bad number syntax: %q", l.input[l.start:l.pos])
-	}
-	if sign := l.peek(); sign == '+' || sign == '-' {
-		// Complex: 1+2i. No spaces, must end in 'i'.
-		if !l.scanNumber() || l.input[l.pos-1] != 'i' {
-			return l.errorf("bad number syntax: %q", l.input[l.start:l.pos])
-		}
-		l.emit(itemComplex)
-	} else {
-		l.emit(itemNumber)
-	}
-	return lexInsideAction
-}
-
-func (l *lexer) scanNumber() bool {
-	// Optional leading sign.
-	l.accept("+-")
-	// Is it hex?
-	digits := "0123456789"
-	if l.accept("0") && l.accept("xX") {
-		digits = "0123456789abcdefABCDEF"
-	}
-	l.acceptRun(digits)
-	if l.accept(".") {
-		l.acceptRun(digits)
-	}
-	if l.accept("eE") {
-		l.accept("+-")
-		l.acceptRun("0123456789")
-	}
-	// Is it imaginary?
-	l.accept("i")
-	// Next thing mustn't be alphanumeric.
-	if isAlphaNumeric(l.peek()) {
-		l.next()
-		return false
-	}
-	return true
-}
-
-// lexQuote scans a quoted string.
-func lexQuote(l *lexer) stateFn {
-Loop:
-	for {
-		switch l.next() {
-		case '\\':
-			if r := l.next(); r != eof && r != '\n' {
-				break
-			}
-			fallthrough
-		case eof, '\n':
-			return l.errorf("unterminated quoted string")
-		case '"':
-			break Loop
-		}
-	}
-	l.emit(itemString)
-	return lexInsideAction
-}
-
-// lexRawQuote scans a raw quoted string.
-func lexRawQuote(l *lexer) stateFn {
-Loop:
-	for {
-		switch l.next() {
-		case eof, '\n':
-			return l.errorf("unterminated raw quoted string")
-		case '`':
-			break Loop
-		}
-	}
-	l.emit(itemRawString)
-	return lexInsideAction
-}
-
-// isSpace reports whether r is a space character.
-func isSpace(r rune) bool {
-	return r == ' ' || r == '\t'
-}
-
-// isEndOfLine reports whether r is an end-of-line character.
-func isEndOfLine(r rune) bool {
-	return r == '\r' || r == '\n'
-}
-
-// isAlphaNumeric reports whether r is an alphabetic, digit, or underscore.
-func isAlphaNumeric(r rune) bool {
-	return r == '_' || unicode.IsLetter(r) || unicode.IsDigit(r)
-}

vendor/github.com/alecthomas/template/parse/node.go

@@ -1,834 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Parse nodes.
-
-package parse
-
-import (
-	"bytes"
-	"fmt"
-	"strconv"
-	"strings"
-)
-
-var textFormat = "%s" // Changed to "%q" in tests for better error messages.
-
-// A Node is an element in the parse tree. The interface is trivial.
-// The interface contains an unexported method so that only
-// types local to this package can satisfy it.
-type Node interface {
-	Type() NodeType
-	String() string
-	// Copy does a deep copy of the Node and all its components.
-	// To avoid type assertions, some XxxNodes also have specialized
-	// CopyXxx methods that return *XxxNode.
-	Copy() Node
-	Position() Pos // byte position of start of node in full original input string
-	// tree returns the containing *Tree.
-	// It is unexported so all implementations of Node are in this package.
-	tree() *Tree
-}
-
-// NodeType identifies the type of a parse tree node.
-type NodeType int
-
-// Pos represents a byte position in the original input text from which
-// this template was parsed.
-type Pos int
-
-func (p Pos) Position() Pos {
-	return p
-}
-
-// Type returns itself and provides an easy default implementation
-// for embedding in a Node. Embedded in all non-trivial Nodes.
-func (t NodeType) Type() NodeType {
-	return t
-}
-
-const (
-	NodeText       NodeType = iota // Plain text.
-	NodeAction                     // A non-control action such as a field evaluation.
-	NodeBool                       // A boolean constant.
-	NodeChain                      // A sequence of field accesses.
-	NodeCommand                    // An element of a pipeline.
-	NodeDot                        // The cursor, dot.
-	nodeElse                       // An else action. Not added to tree.
-	nodeEnd                        // An end action. Not added to tree.
-	NodeField                      // A field or method name.
-	NodeIdentifier                 // An identifier; always a function name.
-	NodeIf                         // An if action.
-	NodeList                       // A list of Nodes.
-	NodeNil                        // An untyped nil constant.
-	NodeNumber                     // A numerical constant.
-	NodePipe                       // A pipeline of commands.
-	NodeRange                      // A range action.
-	NodeString                     // A string constant.
-	NodeTemplate                   // A template invocation action.
-	NodeVariable                   // A $ variable.
-	NodeWith                       // A with action.
-)
-
-// Nodes.
-
-// ListNode holds a sequence of nodes.
-type ListNode struct {
-	NodeType
-	Pos
-	tr    *Tree
-	Nodes []Node // The element nodes in lexical order.
-}
-
-func (t *Tree) newList(pos Pos) *ListNode {
-	return &ListNode{tr: t, NodeType: NodeList, Pos: pos}
-}
-
-func (l *ListNode) append(n Node) {
-	l.Nodes = append(l.Nodes, n)
-}
-
-func (l *ListNode) tree() *Tree {
-	return l.tr
-}
-
-func (l *ListNode) String() string {
-	b := new(bytes.Buffer)
-	for _, n := range l.Nodes {
-		fmt.Fprint(b, n)
-	}
-	return b.String()
-}
-
-func (l *ListNode) CopyList() *ListNode {
-	if l == nil {
-		return l
-	}
-	n := l.tr.newList(l.Pos)
-	for _, elem := range l.Nodes {
-		n.append(elem.Copy())
-	}
-	return n
-}
-
-func (l *ListNode) Copy() Node {
-	return l.CopyList()
-}
-
-// TextNode holds plain text.
-type TextNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Text []byte // The text; may span newlines.
-}
-
-func (t *Tree) newText(pos Pos, text string) *TextNode {
-	return &TextNode{tr: t, NodeType: NodeText, Pos: pos, Text: []byte(text)}
-}
-
-func (t *TextNode) String() string {
-	return fmt.Sprintf(textFormat, t.Text)
-}
-
-func (t *TextNode) tree() *Tree {
-	return t.tr
-}
-
-func (t *TextNode) Copy() Node {
-	return &TextNode{tr: t.tr, NodeType: NodeText, Pos: t.Pos, Text: append([]byte{}, t.Text...)}
-}
-
-// PipeNode holds a pipeline with optional declaration
-type PipeNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Line int             // The line number in the input (deprecated; kept for compatibility)
-	Decl []*VariableNode // Variable declarations in lexical order.
-	Cmds []*CommandNode  // The commands in lexical order.
-}
-
-func (t *Tree) newPipeline(pos Pos, line int, decl []*VariableNode) *PipeNode {
-	return &PipeNode{tr: t, NodeType: NodePipe, Pos: pos, Line: line, Decl: decl}
-}
-
-func (p *PipeNode) append(command *CommandNode) {
-	p.Cmds = append(p.Cmds, command)
-}
-
-func (p *PipeNode) String() string {
-	s := ""
-	if len(p.Decl) > 0 {
-		for i, v := range p.Decl {
-			if i > 0 {
-				s += ", "
-			}
-			s += v.String()
-		}
-		s += " := "
-	}
-	for i, c := range p.Cmds {
-		if i > 0 {
-			s += " | "
-		}
-		s += c.String()
-	}
-	return s
-}
-
-func (p *PipeNode) tree() *Tree {
-	return p.tr
-}
-
-func (p *PipeNode) CopyPipe() *PipeNode {
-	if p == nil {
-		return p
-	}
-	var decl []*VariableNode
-	for _, d := range p.Decl {
-		decl = append(decl, d.Copy().(*VariableNode))
-	}
-	n := p.tr.newPipeline(p.Pos, p.Line, decl)
-	for _, c := range p.Cmds {
-		n.append(c.Copy().(*CommandNode))
-	}
-	return n
-}
-
-func (p *PipeNode) Copy() Node {
-	return p.CopyPipe()
-}
-
-// ActionNode holds an action (something bounded by delimiters).
-// Control actions have their own nodes; ActionNode represents simple
-// ones such as field evaluations and parenthesized pipelines.
-type ActionNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Line int       // The line number in the input (deprecated; kept for compatibility)
-	Pipe *PipeNode // The pipeline in the action.
-}
-
-func (t *Tree) newAction(pos Pos, line int, pipe *PipeNode) *ActionNode {
-	return &ActionNode{tr: t, NodeType: NodeAction, Pos: pos, Line: line, Pipe: pipe}
-}
-
-func (a *ActionNode) String() string {
-	return fmt.Sprintf("{{%s}}", a.Pipe)
-
-}
-
-func (a *ActionNode) tree() *Tree {
-	return a.tr
-}
-
-func (a *ActionNode) Copy() Node {
-	return a.tr.newAction(a.Pos, a.Line, a.Pipe.CopyPipe())
-
-}
-
-// CommandNode holds a command (a pipeline inside an evaluating action).
-type CommandNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Args []Node // Arguments in lexical order: Identifier, field, or constant.
-}
-
-func (t *Tree) newCommand(pos Pos) *CommandNode {
-	return &CommandNode{tr: t, NodeType: NodeCommand, Pos: pos}
-}
-
-func (c *CommandNode) append(arg Node) {
-	c.Args = append(c.Args, arg)
-}
-
-func (c *CommandNode) String() string {
-	s := ""
-	for i, arg := range c.Args {
-		if i > 0 {
-			s += " "
-		}
-		if arg, ok := arg.(*PipeNode); ok {
-			s += "(" + arg.String() + ")"
-			continue
-		}
-		s += arg.String()
-	}
-	return s
-}
-
-func (c *CommandNode) tree() *Tree {
-	return c.tr
-}
-
-func (c *CommandNode) Copy() Node {
-	if c == nil {
-		return c
-	}
-	n := c.tr.newCommand(c.Pos)
-	for _, c := range c.Args {
-		n.append(c.Copy())
-	}
-	return n
-}
-
-// IdentifierNode holds an identifier.
-type IdentifierNode struct {
-	NodeType
-	Pos
-	tr    *Tree
-	Ident string // The identifier's name.
-}
-
-// NewIdentifier returns a new IdentifierNode with the given identifier name.
-func NewIdentifier(ident string) *IdentifierNode {
-	return &IdentifierNode{NodeType: NodeIdentifier, Ident: ident}
-}
-
-// SetPos sets the position. NewIdentifier is a public method so we can't modify its signature.
-// Chained for convenience.
-// TODO: fix one day?
-func (i *IdentifierNode) SetPos(pos Pos) *IdentifierNode {
-	i.Pos = pos
-	return i
-}
-
-// SetTree sets the parent tree for the node. NewIdentifier is a public method so we can't modify its signature.
-// Chained for convenience.
-// TODO: fix one day?
-func (i *IdentifierNode) SetTree(t *Tree) *IdentifierNode {
-	i.tr = t
-	return i
-}
-
-func (i *IdentifierNode) String() string {
-	return i.Ident
-}
-
-func (i *IdentifierNode) tree() *Tree {
-	return i.tr
-}
-
-func (i *IdentifierNode) Copy() Node {
-	return NewIdentifier(i.Ident).SetTree(i.tr).SetPos(i.Pos)
-}
-
-// VariableNode holds a list of variable names, possibly with chained field
-// accesses. The dollar sign is part of the (first) name.
-type VariableNode struct {
-	NodeType
-	Pos
-	tr    *Tree
-	Ident []string // Variable name and fields in lexical order.
-}
-
-func (t *Tree) newVariable(pos Pos, ident string) *VariableNode {
-	return &VariableNode{tr: t, NodeType: NodeVariable, Pos: pos, Ident: strings.Split(ident, ".")}
-}
-
-func (v *VariableNode) String() string {
-	s := ""
-	for i, id := range v.Ident {
-		if i > 0 {
-			s += "."
-		}
-		s += id
-	}
-	return s
-}
-
-func (v *VariableNode) tree() *Tree {
-	return v.tr
-}
-
-func (v *VariableNode) Copy() Node {
-	return &VariableNode{tr: v.tr, NodeType: NodeVariable, Pos: v.Pos, Ident: append([]string{}, v.Ident...)}
-}
-
-// DotNode holds the special identifier '.'.
-type DotNode struct {
-	NodeType
-	Pos
-	tr *Tree
-}
-
-func (t *Tree) newDot(pos Pos) *DotNode {
-	return &DotNode{tr: t, NodeType: NodeDot, Pos: pos}
-}
-
-func (d *DotNode) Type() NodeType {
-	// Override method on embedded NodeType for API compatibility.
-	// TODO: Not really a problem; could change API without effect but
-	// api tool complains.
-	return NodeDot
-}
-
-func (d *DotNode) String() string {
-	return "."
-}
-
-func (d *DotNode) tree() *Tree {
-	return d.tr
-}
-
-func (d *DotNode) Copy() Node {
-	return d.tr.newDot(d.Pos)
-}
-
-// NilNode holds the special identifier 'nil' representing an untyped nil constant.
-type NilNode struct {
-	NodeType
-	Pos
-	tr *Tree
-}
-
-func (t *Tree) newNil(pos Pos) *NilNode {
-	return &NilNode{tr: t, NodeType: NodeNil, Pos: pos}
-}
-
-func (n *NilNode) Type() NodeType {
-	// Override method on embedded NodeType for API compatibility.
-	// TODO: Not really a problem; could change API without effect but
-	// api tool complains.
-	return NodeNil
-}
-
-func (n *NilNode) String() string {
-	return "nil"
-}
-
-func (n *NilNode) tree() *Tree {
-	return n.tr
-}
-
-func (n *NilNode) Copy() Node {
-	return n.tr.newNil(n.Pos)
-}
-
-// FieldNode holds a field (identifier starting with '.').
-// The names may be chained ('.x.y').
-// The period is dropped from each ident.
-type FieldNode struct {
-	NodeType
-	Pos
-	tr    *Tree
-	Ident []string // The identifiers in lexical order.
-}
-
-func (t *Tree) newField(pos Pos, ident string) *FieldNode {
-	return &FieldNode{tr: t, NodeType: NodeField, Pos: pos, Ident: strings.Split(ident[1:], ".")} // [1:] to drop leading period
-}
-
-func (f *FieldNode) String() string {
-	s := ""
-	for _, id := range f.Ident {
-		s += "." + id
-	}
-	return s
-}
-
-func (f *FieldNode) tree() *Tree {
-	return f.tr
-}
-
-func (f *FieldNode) Copy() Node {
-	return &FieldNode{tr: f.tr, NodeType: NodeField, Pos: f.Pos, Ident: append([]string{}, f.Ident...)}
-}
-
-// ChainNode holds a term followed by a chain of field accesses (identifier starting with '.').
-// The names may be chained ('.x.y').
-// The periods are dropped from each ident.
-type ChainNode struct {
-	NodeType
-	Pos
-	tr    *Tree
-	Node  Node
-	Field []string // The identifiers in lexical order.
-}
-
-func (t *Tree) newChain(pos Pos, node Node) *ChainNode {
-	return &ChainNode{tr: t, NodeType: NodeChain, Pos: pos, Node: node}
-}
-
-// Add adds the named field (which should start with a period) to the end of the chain.
-func (c *ChainNode) Add(field string) {
-	if len(field) == 0 || field[0] != '.' {
-		panic("no dot in field")
-	}
-	field = field[1:] // Remove leading dot.
-	if field == "" {
-		panic("empty field")
-	}
-	c.Field = append(c.Field, field)
-}
-
-func (c *ChainNode) String() string {
-	s := c.Node.String()
-	if _, ok := c.Node.(*PipeNode); ok {
-		s = "(" + s + ")"
-	}
-	for _, field := range c.Field {
-		s += "." + field
-	}
-	return s
-}
-
-func (c *ChainNode) tree() *Tree {
-	return c.tr
-}
-
-func (c *ChainNode) Copy() Node {
-	return &ChainNode{tr: c.tr, NodeType: NodeChain, Pos: c.Pos, Node: c.Node, Field: append([]string{}, c.Field...)}
-}
-
-// BoolNode holds a boolean constant.
-type BoolNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	True bool // The value of the boolean constant.
-}
-
-func (t *Tree) newBool(pos Pos, true bool) *BoolNode {
-	return &BoolNode{tr: t, NodeType: NodeBool, Pos: pos, True: true}
-}
-
-func (b *BoolNode) String() string {
-	if b.True {
-		return "true"
-	}
-	return "false"
-}
-
-func (b *BoolNode) tree() *Tree {
-	return b.tr
-}
-
-func (b *BoolNode) Copy() Node {
-	return b.tr.newBool(b.Pos, b.True)
-}
-
-// NumberNode holds a number: signed or unsigned integer, float, or complex.
-// The value is parsed and stored under all the types that can represent the value.
-// This simulates in a small amount of code the behavior of Go's ideal constants.
-type NumberNode struct {
-	NodeType
-	Pos
-	tr         *Tree
-	IsInt      bool       // Number has an integral value.
-	IsUint     bool       // Number has an unsigned integral value.
-	IsFloat    bool       // Number has a floating-point value.
-	IsComplex  bool       // Number is complex.
-	Int64      int64      // The signed integer value.
-	Uint64     uint64     // The unsigned integer value.
-	Float64    float64    // The floating-point value.
-	Complex128 complex128 // The complex value.
-	Text       string     // The original textual representation from the input.
-}
-
-func (t *Tree) newNumber(pos Pos, text string, typ itemType) (*NumberNode, error) {
-	n := &NumberNode{tr: t, NodeType: NodeNumber, Pos: pos, Text: text}
-	switch typ {
-	case itemCharConstant:
-		rune, _, tail, err := strconv.UnquoteChar(text[1:], text[0])
-		if err != nil {
-			return nil, err
-		}
-		if tail != "'" {
-			return nil, fmt.Errorf("malformed character constant: %s", text)
-		}
-		n.Int64 = int64(rune)
-		n.IsInt = true
-		n.Uint64 = uint64(rune)
-		n.IsUint = true
-		n.Float64 = float64(rune) // odd but those are the rules.
-		n.IsFloat = true
-		return n, nil
-	case itemComplex:
-		// fmt.Sscan can parse the pair, so let it do the work.
-		if _, err := fmt.Sscan(text, &n.Complex128); err != nil {
-			return nil, err
-		}
-		n.IsComplex = true
-		n.simplifyComplex()
-		return n, nil
-	}
-	// Imaginary constants can only be complex unless they are zero.
-	if len(text) > 0 && text[len(text)-1] == 'i' {
-		f, err := strconv.ParseFloat(text[:len(text)-1], 64)
-		if err == nil {
-			n.IsComplex = true
-			n.Complex128 = complex(0, f)
-			n.simplifyComplex()
-			return n, nil
-		}
-	}
-	// Do integer test first so we get 0x123 etc.
-	u, err := strconv.ParseUint(text, 0, 64) // will fail for -0; fixed below.
-	if err == nil {
-		n.IsUint = true
-		n.Uint64 = u
-	}
-	i, err := strconv.ParseInt(text, 0, 64)
-	if err == nil {
-		n.IsInt = true
-		n.Int64 = i
-		if i == 0 {
-			n.IsUint = true // in case of -0.
-			n.Uint64 = u
-		}
-	}
-	// If an integer extraction succeeded, promote the float.
-	if n.IsInt {
-		n.IsFloat = true
-		n.Float64 = float64(n.Int64)
-	} else if n.IsUint {
-		n.IsFloat = true
-		n.Float64 = float64(n.Uint64)
-	} else {
-		f, err := strconv.ParseFloat(text, 64)
-		if err == nil {
-			n.IsFloat = true
-			n.Float64 = f
-			// If a floating-point extraction succeeded, extract the int if needed.
-			if !n.IsInt && float64(int64(f)) == f {
-				n.IsInt = true
-				n.Int64 = int64(f)
-			}
-			if !n.IsUint && float64(uint64(f)) == f {
-				n.IsUint = true
-				n.Uint64 = uint64(f)
-			}
-		}
-	}
-	if !n.IsInt && !n.IsUint && !n.IsFloat {
-		return nil, fmt.Errorf("illegal number syntax: %q", text)
-	}
-	return n, nil
-}
-
-// simplifyComplex pulls out any other types that are represented by the complex number.
-// These all require that the imaginary part be zero.
-func (n *NumberNode) simplifyComplex() {
-	n.IsFloat = imag(n.Complex128) == 0
-	if n.IsFloat {
-		n.Float64 = real(n.Complex128)
-		n.IsInt = float64(int64(n.Float64)) == n.Float64
-		if n.IsInt {
-			n.Int64 = int64(n.Float64)
-		}
-		n.IsUint = float64(uint64(n.Float64)) == n.Float64
-		if n.IsUint {
-			n.Uint64 = uint64(n.Float64)
-		}
-	}
-}
-
-func (n *NumberNode) String() string {
-	return n.Text
-}
-
-func (n *NumberNode) tree() *Tree {
-	return n.tr
-}
-
-func (n *NumberNode) Copy() Node {
-	nn := new(NumberNode)
-	*nn = *n // Easy, fast, correct.
-	return nn
-}
-
-// StringNode holds a string constant. The value has been "unquoted".
-type StringNode struct {
-	NodeType
-	Pos
-	tr     *Tree
-	Quoted string // The original text of the string, with quotes.
-	Text   string // The string, after quote processing.
-}
-
-func (t *Tree) newString(pos Pos, orig, text string) *StringNode {
-	return &StringNode{tr: t, NodeType: NodeString, Pos: pos, Quoted: orig, Text: text}
-}
-
-func (s *StringNode) String() string {
-	return s.Quoted
-}
-
-func (s *StringNode) tree() *Tree {
-	return s.tr
-}
-
-func (s *StringNode) Copy() Node {
-	return s.tr.newString(s.Pos, s.Quoted, s.Text)
-}
-
-// endNode represents an {{end}} action.
-// It does not appear in the final parse tree.
-type endNode struct {
-	NodeType
-	Pos
-	tr *Tree
-}
-
-func (t *Tree) newEnd(pos Pos) *endNode {
-	return &endNode{tr: t, NodeType: nodeEnd, Pos: pos}
-}
-
-func (e *endNode) String() string {
-	return "{{end}}"
-}
-
-func (e *endNode) tree() *Tree {
-	return e.tr
-}
-
-func (e *endNode) Copy() Node {
-	return e.tr.newEnd(e.Pos)
-}
-
-// elseNode represents an {{else}} action. Does not appear in the final tree.
-type elseNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Line int // The line number in the input (deprecated; kept for compatibility)
-}
-
-func (t *Tree) newElse(pos Pos, line int) *elseNode {
-	return &elseNode{tr: t, NodeType: nodeElse, Pos: pos, Line: line}
-}
-
-func (e *elseNode) Type() NodeType {
-	return nodeElse
-}
-
-func (e *elseNode) String() string {
-	return "{{else}}"
-}
-
-func (e *elseNode) tree() *Tree {
-	return e.tr
-}
-
-func (e *elseNode) Copy() Node {
-	return e.tr.newElse(e.Pos, e.Line)
-}
-
-// BranchNode is the common representation of if, range, and with.
-type BranchNode struct {
-	NodeType
-	Pos
-	tr       *Tree
-	Line     int       // The line number in the input (deprecated; kept for compatibility)
-	Pipe     *PipeNode // The pipeline to be evaluated.
-	List     *ListNode // What to execute if the value is non-empty.
-	ElseList *ListNode // What to execute if the value is empty (nil if absent).
-}
-
-func (b *BranchNode) String() string {
-	name := ""
-	switch b.NodeType {
-	case NodeIf:
-		name = "if"
-	case NodeRange:
-		name = "range"
-	case NodeWith:
-		name = "with"
-	default:
-		panic("unknown branch type")
-	}
-	if b.ElseList != nil {
-		return fmt.Sprintf("{{%s %s}}%s{{else}}%s{{end}}", name, b.Pipe, b.List, b.ElseList)
-	}
-	return fmt.Sprintf("{{%s %s}}%s{{end}}", name, b.Pipe, b.List)
-}
-
-func (b *BranchNode) tree() *Tree {
-	return b.tr
-}
-
-func (b *BranchNode) Copy() Node {
-	switch b.NodeType {
-	case NodeIf:
-		return b.tr.newIf(b.Pos, b.Line, b.Pipe, b.List, b.ElseList)
-	case NodeRange:
-		return b.tr.newRange(b.Pos, b.Line, b.Pipe, b.List, b.ElseList)
-	case NodeWith:
-		return b.tr.newWith(b.Pos, b.Line, b.Pipe, b.List, b.ElseList)
-	default:
-		panic("unknown branch type")
-	}
-}
-
-// IfNode represents an {{if}} action and its commands.
-type IfNode struct {
-	BranchNode
-}
-
-func (t *Tree) newIf(pos Pos, line int, pipe *PipeNode, list, elseList *ListNode) *IfNode {
-	return &IfNode{BranchNode{tr: t, NodeType: NodeIf, Pos: pos, Line: line, Pipe: pipe, List: list, ElseList: elseList}}
-}
-
-func (i *IfNode) Copy() Node {
-	return i.tr.newIf(i.Pos, i.Line, i.Pipe.CopyPipe(), i.List.CopyList(), i.ElseList.CopyList())
-}
-
-// RangeNode represents a {{range}} action and its commands.
-type RangeNode struct {
-	BranchNode
-}
-
-func (t *Tree) newRange(pos Pos, line int, pipe *PipeNode, list, elseList *ListNode) *RangeNode {
-	return &RangeNode{BranchNode{tr: t, NodeType: NodeRange, Pos: pos, Line: line, Pipe: pipe, List: list, ElseList: elseList}}
-}
-
-func (r *RangeNode) Copy() Node {
-	return r.tr.newRange(r.Pos, r.Line, r.Pipe.CopyPipe(), r.List.CopyList(), r.ElseList.CopyList())
-}
-
-// WithNode represents a {{with}} action and its commands.
-type WithNode struct {
-	BranchNode
-}
-
-func (t *Tree) newWith(pos Pos, line int, pipe *PipeNode, list, elseList *ListNode) *WithNode {
-	return &WithNode{BranchNode{tr: t, NodeType: NodeWith, Pos: pos, Line: line, Pipe: pipe, List: list, ElseList: elseList}}
-}
-
-func (w *WithNode) Copy() Node {
-	return w.tr.newWith(w.Pos, w.Line, w.Pipe.CopyPipe(), w.List.CopyList(), w.ElseList.CopyList())
-}
-
-// TemplateNode represents a {{template}} action.
-type TemplateNode struct {
-	NodeType
-	Pos
-	tr   *Tree
-	Line int       // The line number in the input (deprecated; kept for compatibility)
-	Name string    // The name of the template (unquoted).
-	Pipe *PipeNode // The command to evaluate as dot for the template.
-}
-
-func (t *Tree) newTemplate(pos Pos, line int, name string, pipe *PipeNode) *TemplateNode {
-	return &TemplateNode{tr: t, NodeType: NodeTemplate, Pos: pos, Line: line, Name: name, Pipe: pipe}
-}
-
-func (t *TemplateNode) String() string {
-	if t.Pipe == nil {
-		return fmt.Sprintf("{{template %q}}", t.Name)
-	}
-	return fmt.Sprintf("{{template %q %s}}", t.Name, t.Pipe)
-}
-
-func (t *TemplateNode) tree() *Tree {
-	return t.tr
-}
-
-func (t *TemplateNode) Copy() Node {
-	return t.tr.newTemplate(t.Pos, t.Line, t.Name, t.Pipe.CopyPipe())
-}

vendor/github.com/alecthomas/template/parse/parse.go

@@ -1,700 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package parse builds parse trees for templates as defined by text/template
-// and html/template. Clients should use those packages to construct templates
-// rather than this one, which provides shared internal data structures not
-// intended for general use.
-package parse
-
-import (
-	"bytes"
-	"fmt"
-	"runtime"
-	"strconv"
-	"strings"
-)
-
-// Tree is the representation of a single parsed template.
-type Tree struct {
-	Name      string    // name of the template represented by the tree.
-	ParseName string    // name of the top-level template during parsing, for error messages.
-	Root      *ListNode // top-level root of the tree.
-	text      string    // text parsed to create the template (or its parent)
-	// Parsing only; cleared after parse.
-	funcs     []map[string]interface{}
-	lex       *lexer
-	token     [3]item // three-token lookahead for parser.
-	peekCount int
-	vars      []string // variables defined at the moment.
-}
-
-// Copy returns a copy of the Tree. Any parsing state is discarded.
-func (t *Tree) Copy() *Tree {
-	if t == nil {
-		return nil
-	}
-	return &Tree{
-		Name:      t.Name,
-		ParseName: t.ParseName,
-		Root:      t.Root.CopyList(),
-		text:      t.text,
-	}
-}
-
-// Parse returns a map from template name to parse.Tree, created by parsing the
-// templates described in the argument string. The top-level template will be
-// given the specified name. If an error is encountered, parsing stops and an
-// empty map is returned with the error.
-func Parse(name, text, leftDelim, rightDelim string, funcs ...map[string]interface{}) (treeSet map[string]*Tree, err error) {
-	treeSet = make(map[string]*Tree)
-	t := New(name)
-	t.text = text
-	_, err = t.Parse(text, leftDelim, rightDelim, treeSet, funcs...)
-	return
-}
-
-// next returns the next token.
-func (t *Tree) next() item {
-	if t.peekCount > 0 {
-		t.peekCount--
-	} else {
-		t.token[0] = t.lex.nextItem()
-	}
-	return t.token[t.peekCount]
-}
-
-// backup backs the input stream up one token.
-func (t *Tree) backup() {
-	t.peekCount++
-}
-
-// backup2 backs the input stream up two tokens.
-// The zeroth token is already there.
-func (t *Tree) backup2(t1 item) {
-	t.token[1] = t1
-	t.peekCount = 2
-}
-
-// backup3 backs the input stream up three tokens
-// The zeroth token is already there.
-func (t *Tree) backup3(t2, t1 item) { // Reverse order: we're pushing back.
-	t.token[1] = t1
-	t.token[2] = t2
-	t.peekCount = 3
-}
-
-// peek returns but does not consume the next token.
-func (t *Tree) peek() item {
-	if t.peekCount > 0 {
-		return t.token[t.peekCount-1]
-	}
-	t.peekCount = 1
-	t.token[0] = t.lex.nextItem()
-	return t.token[0]
-}
-
-// nextNonSpace returns the next non-space token.
-func (t *Tree) nextNonSpace() (token item) {
-	for {
-		token = t.next()
-		if token.typ != itemSpace {
-			break
-		}
-	}
-	return token
-}
-
-// peekNonSpace returns but does not consume the next non-space token.
-func (t *Tree) peekNonSpace() (token item) {
-	for {
-		token = t.next()
-		if token.typ != itemSpace {
-			break
-		}
-	}
-	t.backup()
-	return token
-}
-
-// Parsing.
-
-// New allocates a new parse tree with the given name.
-func New(name string, funcs ...map[string]interface{}) *Tree {
-	return &Tree{
-		Name:  name,
-		funcs: funcs,
-	}
-}
-
-// ErrorContext returns a textual representation of the location of the node in the input text.
-// The receiver is only used when the node does not have a pointer to the tree inside,
-// which can occur in old code.
-func (t *Tree) ErrorContext(n Node) (location, context string) {
-	pos := int(n.Position())
-	tree := n.tree()
-	if tree == nil {
-		tree = t
-	}
-	text := tree.text[:pos]
-	byteNum := strings.LastIndex(text, "\n")
-	if byteNum == -1 {
-		byteNum = pos // On first line.
-	} else {
-		byteNum++ // After the newline.
-		byteNum = pos - byteNum
-	}
-	lineNum := 1 + strings.Count(text, "\n")
-	context = n.String()
-	if len(context) > 20 {
-		context = fmt.Sprintf("%.20s...", context)
-	}
-	return fmt.Sprintf("%s:%d:%d", tree.ParseName, lineNum, byteNum), context
-}
-
-// errorf formats the error and terminates processing.
-func (t *Tree) errorf(format string, args ...interface{}) {
-	t.Root = nil
-	format = fmt.Sprintf("template: %s:%d: %s", t.ParseName, t.lex.lineNumber(), format)
-	panic(fmt.Errorf(format, args...))
-}
-
-// error terminates processing.
-func (t *Tree) error(err error) {
-	t.errorf("%s", err)
-}
-
-// expect consumes the next token and guarantees it has the required type.
-func (t *Tree) expect(expected itemType, context string) item {
-	token := t.nextNonSpace()
-	if token.typ != expected {
-		t.unexpected(token, context)
-	}
-	return token
-}
-
-// expectOneOf consumes the next token and guarantees it has one of the required types.
-func (t *Tree) expectOneOf(expected1, expected2 itemType, context string) item {
-	token := t.nextNonSpace()
-	if token.typ != expected1 && token.typ != expected2 {
-		t.unexpected(token, context)
-	}
-	return token
-}
-
-// unexpected complains about the token and terminates processing.
-func (t *Tree) unexpected(token item, context string) {
-	t.errorf("unexpected %s in %s", token, context)
-}
-
-// recover is the handler that turns panics into returns from the top level of Parse.
-func (t *Tree) recover(errp *error) {
-	e := recover()
-	if e != nil {
-		if _, ok := e.(runtime.Error); ok {
-			panic(e)
-		}
-		if t != nil {
-			t.stopParse()
-		}
-		*errp = e.(error)
-	}
-	return
-}
-
-// startParse initializes the parser, using the lexer.
-func (t *Tree) startParse(funcs []map[string]interface{}, lex *lexer) {
-	t.Root = nil
-	t.lex = lex
-	t.vars = []string{"$"}
-	t.funcs = funcs
-}
-
-// stopParse terminates parsing.
-func (t *Tree) stopParse() {
-	t.lex = nil
-	t.vars = nil
-	t.funcs = nil
-}
-
-// Parse parses the template definition string to construct a representation of
-// the template for execution. If either action delimiter string is empty, the
-// default ("{{" or "}}") is used. Embedded template definitions are added to
-// the treeSet map.
-func (t *Tree) Parse(text, leftDelim, rightDelim string, treeSet map[string]*Tree, funcs ...map[string]interface{}) (tree *Tree, err error) {
-	defer t.recover(&err)
-	t.ParseName = t.Name
-	t.startParse(funcs, lex(t.Name, text, leftDelim, rightDelim))
-	t.text = text
-	t.parse(treeSet)
-	t.add(treeSet)
-	t.stopParse()
-	return t, nil
-}
-
-// add adds tree to the treeSet.
-func (t *Tree) add(treeSet map[string]*Tree) {
-	tree := treeSet[t.Name]
-	if tree == nil || IsEmptyTree(tree.Root) {
-		treeSet[t.Name] = t
-		return
-	}
-	if !IsEmptyTree(t.Root) {
-		t.errorf("template: multiple definition of template %q", t.Name)
-	}
-}
-
-// IsEmptyTree reports whether this tree (node) is empty of everything but space.
-func IsEmptyTree(n Node) bool {
-	switch n := n.(type) {
-	case nil:
-		return true
-	case *ActionNode:
-	case *IfNode:
-	case *ListNode:
-		for _, node := range n.Nodes {
-			if !IsEmptyTree(node) {
-				return false
-			}
-		}
-		return true
-	case *RangeNode:
-	case *TemplateNode:
-	case *TextNode:
-		return len(bytes.TrimSpace(n.Text)) == 0
-	case *WithNode:
-	default:
-		panic("unknown node: " + n.String())
-	}
-	return false
-}
-
-// parse is the top-level parser for a template, essentially the same
-// as itemList except it also parses {{define}} actions.
-// It runs to EOF.
-func (t *Tree) parse(treeSet map[string]*Tree) (next Node) {
-	t.Root = t.newList(t.peek().pos)
-	for t.peek().typ != itemEOF {
-		if t.peek().typ == itemLeftDelim {
-			delim := t.next()
-			if t.nextNonSpace().typ == itemDefine {
-				newT := New("definition") // name will be updated once we know it.
-				newT.text = t.text
-				newT.ParseName = t.ParseName
-				newT.startParse(t.funcs, t.lex)
-				newT.parseDefinition(treeSet)
-				continue
-			}
-			t.backup2(delim)
-		}
-		n := t.textOrAction()
-		if n.Type() == nodeEnd {
-			t.errorf("unexpected %s", n)
-		}
-		t.Root.append(n)
-	}
-	return nil
-}
-
-// parseDefinition parses a {{define}} ...  {{end}} template definition and
-// installs the definition in the treeSet map.  The "define" keyword has already
-// been scanned.
-func (t *Tree) parseDefinition(treeSet map[string]*Tree) {
-	const context = "define clause"
-	name := t.expectOneOf(itemString, itemRawString, context)
-	var err error
-	t.Name, err = strconv.Unquote(name.val)
-	if err != nil {
-		t.error(err)
-	}
-	t.expect(itemRightDelim, context)
-	var end Node
-	t.Root, end = t.itemList()
-	if end.Type() != nodeEnd {
-		t.errorf("unexpected %s in %s", end, context)
-	}
-	t.add(treeSet)
-	t.stopParse()
-}
-
-// itemList:
-//	textOrAction*
-// Terminates at {{end}} or {{else}}, returned separately.
-func (t *Tree) itemList() (list *ListNode, next Node) {
-	list = t.newList(t.peekNonSpace().pos)
-	for t.peekNonSpace().typ != itemEOF {
-		n := t.textOrAction()
-		switch n.Type() {
-		case nodeEnd, nodeElse:
-			return list, n
-		}
-		list.append(n)
-	}
-	t.errorf("unexpected EOF")
-	return
-}
-
-// textOrAction:
-//	text | action
-func (t *Tree) textOrAction() Node {
-	switch token := t.nextNonSpace(); token.typ {
-	case itemElideNewline:
-		return t.elideNewline()
-	case itemText:
-		return t.newText(token.pos, token.val)
-	case itemLeftDelim:
-		return t.action()
-	default:
-		t.unexpected(token, "input")
-	}
-	return nil
-}
-
-// elideNewline:
-// Remove newlines trailing rightDelim if \\ is present.
-func (t *Tree) elideNewline() Node {
-	token := t.peek()
-	if token.typ != itemText {
-		t.unexpected(token, "input")
-		return nil
-	}
-
-	t.next()
-	stripped := strings.TrimLeft(token.val, "\n\r")
-	diff := len(token.val) - len(stripped)
-	if diff > 0 {
-		// This is a bit nasty. We mutate the token in-place to remove
-		// preceding newlines.
-		token.pos += Pos(diff)
-		token.val = stripped
-	}
-	return t.newText(token.pos, token.val)
-}
-
-// Action:
-//	control
-//	command ("|" command)*
-// Left delim is past. Now get actions.
-// First word could be a keyword such as range.
-func (t *Tree) action() (n Node) {
-	switch token := t.nextNonSpace(); token.typ {
-	case itemElse:
-		return t.elseControl()
-	case itemEnd:
-		return t.endControl()
-	case itemIf:
-		return t.ifControl()
-	case itemRange:
-		return t.rangeControl()
-	case itemTemplate:
-		return t.templateControl()
-	case itemWith:
-		return t.withControl()
-	}
-	t.backup()
-	// Do not pop variables; they persist until "end".
-	return t.newAction(t.peek().pos, t.lex.lineNumber(), t.pipeline("command"))
-}
-
-// Pipeline:
-//	declarations? command ('|' command)*
-func (t *Tree) pipeline(context string) (pipe *PipeNode) {
-	var decl []*VariableNode
-	pos := t.peekNonSpace().pos
-	// Are there declarations?
-	for {
-		if v := t.peekNonSpace(); v.typ == itemVariable {
-			t.next()
-			// Since space is a token, we need 3-token look-ahead here in the worst case:
-			// in "$x foo" we need to read "foo" (as opposed to ":=") to know that $x is an
-			// argument variable rather than a declaration. So remember the token
-			// adjacent to the variable so we can push it back if necessary.
-			tokenAfterVariable := t.peek()
-			if next := t.peekNonSpace(); next.typ == itemColonEquals || (next.typ == itemChar && next.val == ",") {
-				t.nextNonSpace()
-				variable := t.newVariable(v.pos, v.val)
-				decl = append(decl, variable)
-				t.vars = append(t.vars, v.val)
-				if next.typ == itemChar && next.val == "," {
-					if context == "range" && len(decl) < 2 {
-						continue
-					}
-					t.errorf("too many declarations in %s", context)
-				}
-			} else if tokenAfterVariable.typ == itemSpace {
-				t.backup3(v, tokenAfterVariable)
-			} else {
-				t.backup2(v)
-			}
-		}
-		break
-	}
-	pipe = t.newPipeline(pos, t.lex.lineNumber(), decl)
-	for {
-		switch token := t.nextNonSpace(); token.typ {
-		case itemRightDelim, itemRightParen:
-			if len(pipe.Cmds) == 0 {
-				t.errorf("missing value for %s", context)
-			}
-			if token.typ == itemRightParen {
-				t.backup()
-			}
-			return
-		case itemBool, itemCharConstant, itemComplex, itemDot, itemField, itemIdentifier,
-			itemNumber, itemNil, itemRawString, itemString, itemVariable, itemLeftParen:
-			t.backup()
-			pipe.append(t.command())
-		default:
-			t.unexpected(token, context)
-		}
-	}
-}
-
-func (t *Tree) parseControl(allowElseIf bool, context string) (pos Pos, line int, pipe *PipeNode, list, elseList *ListNode) {
-	defer t.popVars(len(t.vars))
-	line = t.lex.lineNumber()
-	pipe = t.pipeline(context)
-	var next Node
-	list, next = t.itemList()
-	switch next.Type() {
-	case nodeEnd: //done
-	case nodeElse:
-		if allowElseIf {
-			// Special case for "else if". If the "else" is followed immediately by an "if",
-			// the elseControl will have left the "if" token pending. Treat
-			//	{{if a}}_{{else if b}}_{{end}}
-			// as
-			//	{{if a}}_{{else}}{{if b}}_{{end}}{{end}}.
-			// To do this, parse the if as usual and stop at it {{end}}; the subsequent{{end}}
-			// is assumed. This technique works even for long if-else-if chains.
-			// TODO: Should we allow else-if in with and range?
-			if t.peek().typ == itemIf {
-				t.next() // Consume the "if" token.
-				elseList = t.newList(next.Position())
-				elseList.append(t.ifControl())
-				// Do not consume the next item - only one {{end}} required.
-				break
-			}
-		}
-		elseList, next = t.itemList()
-		if next.Type() != nodeEnd {
-			t.errorf("expected end; found %s", next)
-		}
-	}
-	return pipe.Position(), line, pipe, list, elseList
-}
-
-// If:
-//	{{if pipeline}} itemList {{end}}
-//	{{if pipeline}} itemList {{else}} itemList {{end}}
-// If keyword is past.
-func (t *Tree) ifControl() Node {
-	return t.newIf(t.parseControl(true, "if"))
-}
-
-// Range:
-//	{{range pipeline}} itemList {{end}}
-//	{{range pipeline}} itemList {{else}} itemList {{end}}
-// Range keyword is past.
-func (t *Tree) rangeControl() Node {
-	return t.newRange(t.parseControl(false, "range"))
-}
-
-// With:
-//	{{with pipeline}} itemList {{end}}
-//	{{with pipeline}} itemList {{else}} itemList {{end}}
-// If keyword is past.
-func (t *Tree) withControl() Node {
-	return t.newWith(t.parseControl(false, "with"))
-}
-
-// End:
-//	{{end}}
-// End keyword is past.
-func (t *Tree) endControl() Node {
-	return t.newEnd(t.expect(itemRightDelim, "end").pos)
-}
-
-// Else:
-//	{{else}}
-// Else keyword is past.
-func (t *Tree) elseControl() Node {
-	// Special case for "else if".
-	peek := t.peekNonSpace()
-	if peek.typ == itemIf {
-		// We see "{{else if ... " but in effect rewrite it to {{else}}{{if ... ".
-		return t.newElse(peek.pos, t.lex.lineNumber())
-	}
-	return t.newElse(t.expect(itemRightDelim, "else").pos, t.lex.lineNumber())
-}
-
-// Template:
-//	{{template stringValue pipeline}}
-// Template keyword is past.  The name must be something that can evaluate
-// to a string.
-func (t *Tree) templateControl() Node {
-	var name string
-	token := t.nextNonSpace()
-	switch token.typ {
-	case itemString, itemRawString:
-		s, err := strconv.Unquote(token.val)
-		if err != nil {
-			t.error(err)
-		}
-		name = s
-	default:
-		t.unexpected(token, "template invocation")
-	}
-	var pipe *PipeNode
-	if t.nextNonSpace().typ != itemRightDelim {
-		t.backup()
-		// Do not pop variables; they persist until "end".
-		pipe = t.pipeline("template")
-	}
-	return t.newTemplate(token.pos, t.lex.lineNumber(), name, pipe)
-}
-
-// command:
-//	operand (space operand)*
-// space-separated arguments up to a pipeline character or right delimiter.
-// we consume the pipe character but leave the right delim to terminate the action.
-func (t *Tree) command() *CommandNode {
-	cmd := t.newCommand(t.peekNonSpace().pos)
-	for {
-		t.peekNonSpace() // skip leading spaces.
-		operand := t.operand()
-		if operand != nil {
-			cmd.append(operand)
-		}
-		switch token := t.next(); token.typ {
-		case itemSpace:
-			continue
-		case itemError:
-			t.errorf("%s", token.val)
-		case itemRightDelim, itemRightParen:
-			t.backup()
-		case itemPipe:
-		default:
-			t.errorf("unexpected %s in operand; missing space?", token)
-		}
-		break
-	}
-	if len(cmd.Args) == 0 {
-		t.errorf("empty command")
-	}
-	return cmd
-}
-
-// operand:
-//	term .Field*
-// An operand is a space-separated component of a command,
-// a term possibly followed by field accesses.
-// A nil return means the next item is not an operand.
-func (t *Tree) operand() Node {
-	node := t.term()
-	if node == nil {
-		return nil
-	}
-	if t.peek().typ == itemField {
-		chain := t.newChain(t.peek().pos, node)
-		for t.peek().typ == itemField {
-			chain.Add(t.next().val)
-		}
-		// Compatibility with original API: If the term is of type NodeField
-		// or NodeVariable, just put more fields on the original.
-		// Otherwise, keep the Chain node.
-		// TODO: Switch to Chains always when we can.
-		switch node.Type() {
-		case NodeField:
-			node = t.newField(chain.Position(), chain.String())
-		case NodeVariable:
-			node = t.newVariable(chain.Position(), chain.String())
-		default:
-			node = chain
-		}
-	}
-	return node
-}
-
-// term:
-//	literal (number, string, nil, boolean)
-//	function (identifier)
-//	.
-//	.Field
-//	$
-//	'(' pipeline ')'
-// A term is a simple "expression".
-// A nil return means the next item is not a term.
-func (t *Tree) term() Node {
-	switch token := t.nextNonSpace(); token.typ {
-	case itemError:
-		t.errorf("%s", token.val)
-	case itemIdentifier:
-		if !t.hasFunction(token.val) {
-			t.errorf("function %q not defined", token.val)
-		}
-		return NewIdentifier(token.val).SetTree(t).SetPos(token.pos)
-	case itemDot:
-		return t.newDot(token.pos)
-	case itemNil:
-		return t.newNil(token.pos)
-	case itemVariable:
-		return t.useVar(token.pos, token.val)
-	case itemField:
-		return t.newField(token.pos, token.val)
-	case itemBool:
-		return t.newBool(token.pos, token.val == "true")
-	case itemCharConstant, itemComplex, itemNumber:
-		number, err := t.newNumber(token.pos, token.val, token.typ)
-		if err != nil {
-			t.error(err)
-		}
-		return number
-	case itemLeftParen:
-		pipe := t.pipeline("parenthesized pipeline")
-		if token := t.next(); token.typ != itemRightParen {
-			t.errorf("unclosed right paren: unexpected %s", token)
-		}
-		return pipe
-	case itemString, itemRawString:
-		s, err := strconv.Unquote(token.val)
-		if err != nil {
-			t.error(err)
-		}
-		return t.newString(token.pos, token.val, s)
-	}
-	t.backup()
-	return nil
-}
-
-// hasFunction reports if a function name exists in the Tree's maps.
-func (t *Tree) hasFunction(name string) bool {
-	for _, funcMap := range t.funcs {
-		if funcMap == nil {
-			continue
-		}
-		if funcMap[name] != nil {
-			return true
-		}
-	}
-	return false
-}
-
-// popVars trims the variable list to the specified length
-func (t *Tree) popVars(n int) {
-	t.vars = t.vars[:n]
-}
-
-// useVar returns a node for a variable reference. It errors if the
-// variable is not defined.
-func (t *Tree) useVar(pos Pos, name string) Node {
-	v := t.newVariable(pos, name)
-	for _, varName := range t.vars {
-		if varName == v.Ident[0] {
-			return v
-		}
-	}
-	t.errorf("undefined variable %q", v.Ident[0])
-	return nil
-}

vendor/github.com/alecthomas/template/template.go

@@ -1,218 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package template
-
-import (
-	"fmt"
-	"reflect"
-
-	"github.com/alecthomas/template/parse"
-)
-
-// common holds the information shared by related templates.
-type common struct {
-	tmpl map[string]*Template
-	// We use two maps, one for parsing and one for execution.
-	// This separation makes the API cleaner since it doesn't
-	// expose reflection to the client.
-	parseFuncs FuncMap
-	execFuncs  map[string]reflect.Value
-}
-
-// Template is the representation of a parsed template. The *parse.Tree
-// field is exported only for use by html/template and should be treated
-// as unexported by all other clients.
-type Template struct {
-	name string
-	*parse.Tree
-	*common
-	leftDelim  string
-	rightDelim string
-}
-
-// New allocates a new template with the given name.
-func New(name string) *Template {
-	return &Template{
-		name: name,
-	}
-}
-
-// Name returns the name of the template.
-func (t *Template) Name() string {
-	return t.name
-}
-
-// New allocates a new template associated with the given one and with the same
-// delimiters. The association, which is transitive, allows one template to
-// invoke another with a {{template}} action.
-func (t *Template) New(name string) *Template {
-	t.init()
-	return &Template{
-		name:       name,
-		common:     t.common,
-		leftDelim:  t.leftDelim,
-		rightDelim: t.rightDelim,
-	}
-}
-
-func (t *Template) init() {
-	if t.common == nil {
-		t.common = new(common)
-		t.tmpl = make(map[string]*Template)
-		t.parseFuncs = make(FuncMap)
-		t.execFuncs = make(map[string]reflect.Value)
-	}
-}
-
-// Clone returns a duplicate of the template, including all associated
-// templates. The actual representation is not copied, but the name space of
-// associated templates is, so further calls to Parse in the copy will add
-// templates to the copy but not to the original. Clone can be used to prepare
-// common templates and use them with variant definitions for other templates
-// by adding the variants after the clone is made.
-func (t *Template) Clone() (*Template, error) {
-	nt := t.copy(nil)
-	nt.init()
-	nt.tmpl[t.name] = nt
-	for k, v := range t.tmpl {
-		if k == t.name { // Already installed.
-			continue
-		}
-		// The associated templates share nt's common structure.
-		tmpl := v.copy(nt.common)
-		nt.tmpl[k] = tmpl
-	}
-	for k, v := range t.parseFuncs {
-		nt.parseFuncs[k] = v
-	}
-	for k, v := range t.execFuncs {
-		nt.execFuncs[k] = v
-	}
-	return nt, nil
-}
-
-// copy returns a shallow copy of t, with common set to the argument.
-func (t *Template) copy(c *common) *Template {
-	nt := New(t.name)
-	nt.Tree = t.Tree
-	nt.common = c
-	nt.leftDelim = t.leftDelim
-	nt.rightDelim = t.rightDelim
-	return nt
-}
-
-// AddParseTree creates a new template with the name and parse tree
-// and associates it with t.
-func (t *Template) AddParseTree(name string, tree *parse.Tree) (*Template, error) {
-	if t.common != nil && t.tmpl[name] != nil {
-		return nil, fmt.Errorf("template: redefinition of template %q", name)
-	}
-	nt := t.New(name)
-	nt.Tree = tree
-	t.tmpl[name] = nt
-	return nt, nil
-}
-
-// Templates returns a slice of the templates associated with t, including t
-// itself.
-func (t *Template) Templates() []*Template {
-	if t.common == nil {
-		return nil
-	}
-	// Return a slice so we don't expose the map.
-	m := make([]*Template, 0, len(t.tmpl))
-	for _, v := range t.tmpl {
-		m = append(m, v)
-	}
-	return m
-}
-
-// Delims sets the action delimiters to the specified strings, to be used in
-// subsequent calls to Parse, ParseFiles, or ParseGlob. Nested template
-// definitions will inherit the settings. An empty delimiter stands for the
-// corresponding default: {{ or }}.
-// The return value is the template, so calls can be chained.
-func (t *Template) Delims(left, right string) *Template {
-	t.leftDelim = left
-	t.rightDelim = right
-	return t
-}
-
-// Funcs adds the elements of the argument map to the template's function map.
-// It panics if a value in the map is not a function with appropriate return
-// type. However, it is legal to overwrite elements of the map. The return
-// value is the template, so calls can be chained.
-func (t *Template) Funcs(funcMap FuncMap) *Template {
-	t.init()
-	addValueFuncs(t.execFuncs, funcMap)
-	addFuncs(t.parseFuncs, funcMap)
-	return t
-}
-
-// Lookup returns the template with the given name that is associated with t,
-// or nil if there is no such template.
-func (t *Template) Lookup(name string) *Template {
-	if t.common == nil {
-		return nil
-	}
-	return t.tmpl[name]
-}
-
-// Parse parses a string into a template. Nested template definitions will be
-// associated with the top-level template t. Parse may be called multiple times
-// to parse definitions of templates to associate with t. It is an error if a
-// resulting template is non-empty (contains content other than template
-// definitions) and would replace a non-empty template with the same name.
-// (In multiple calls to Parse with the same receiver template, only one call
-// can contain text other than space, comments, and template definitions.)
-func (t *Template) Parse(text string) (*Template, error) {
-	t.init()
-	trees, err := parse.Parse(t.name, text, t.leftDelim, t.rightDelim, t.parseFuncs, builtins)
-	if err != nil {
-		return nil, err
-	}
-	// Add the newly parsed trees, including the one for t, into our common structure.
-	for name, tree := range trees {
-		// If the name we parsed is the name of this template, overwrite this template.
-		// The associate method checks it's not a redefinition.
-		tmpl := t
-		if name != t.name {
-			tmpl = t.New(name)
-		}
-		// Even if t == tmpl, we need to install it in the common.tmpl map.
-		if replace, err := t.associate(tmpl, tree); err != nil {
-			return nil, err
-		} else if replace {
-			tmpl.Tree = tree
-		}
-		tmpl.leftDelim = t.leftDelim
-		tmpl.rightDelim = t.rightDelim
-	}
-	return t, nil
-}
-
-// associate installs the new template into the group of templates associated
-// with t. It is an error to reuse a name except to overwrite an empty
-// template. The two are already known to share the common structure.
-// The boolean return value reports wither to store this tree as t.Tree.
-func (t *Template) associate(new *Template, tree *parse.Tree) (bool, error) {
-	if new.common != t.common {
-		panic("internal error: associate not common")
-	}
-	name := new.name
-	if old := t.tmpl[name]; old != nil {
-		oldIsEmpty := parse.IsEmptyTree(old.Root)
-		newIsEmpty := parse.IsEmptyTree(tree.Root)
-		if newIsEmpty {
-			// Whether old is empty or not, new is empty; no reason to replace old.
-			return false, nil
-		}
-		if !oldIsEmpty {
-			return false, fmt.Errorf("template: redefinition of template %q", name)
-		}
-	}
-	t.tmpl[name] = new
-	return true, nil
-}

vendor/github.com/alecthomas/units/COPYING

@@ -1,19 +0,0 @@
-Copyright (C) 2014 Alec Thomas
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

vendor/github.com/alecthomas/units/README.md

@@ -1,11 +0,0 @@
-# Units - Helpful unit multipliers and functions for Go
-
-The goal of this package is to have functionality similar to the [time](http://golang.org/pkg/time/) package.
-
-It allows for code like this:
-
-```go
-n, err := ParseBase2Bytes("1KB")
-// n == 1024
-n = units.Mebibyte * 512
-```

vendor/github.com/alecthomas/units/bytes.go

@@ -1,83 +0,0 @@
-package units
-
-// Base2Bytes is the old non-SI power-of-2 byte scale (1024 bytes in a kilobyte,
-// etc.).
-type Base2Bytes int64
-
-// Base-2 byte units.
-const (
-	Kibibyte Base2Bytes = 1024
-	KiB                 = Kibibyte
-	Mebibyte            = Kibibyte * 1024
-	MiB                 = Mebibyte
-	Gibibyte            = Mebibyte * 1024
-	GiB                 = Gibibyte
-	Tebibyte            = Gibibyte * 1024
-	TiB                 = Tebibyte
-	Pebibyte            = Tebibyte * 1024
-	PiB                 = Pebibyte
-	Exbibyte            = Pebibyte * 1024
-	EiB                 = Exbibyte
-)
-
-var (
-	bytesUnitMap    = MakeUnitMap("iB", "B", 1024)
-	oldBytesUnitMap = MakeUnitMap("B", "B", 1024)
-)
-
-// ParseBase2Bytes supports both iB and B in base-2 multipliers. That is, KB
-// and KiB are both 1024.
-func ParseBase2Bytes(s string) (Base2Bytes, error) {
-	n, err := ParseUnit(s, bytesUnitMap)
-	if err != nil {
-		n, err = ParseUnit(s, oldBytesUnitMap)
-	}
-	return Base2Bytes(n), err
-}
-
-func (b Base2Bytes) String() string {
-	return ToString(int64(b), 1024, "iB", "B")
-}
-
-var (
-	metricBytesUnitMap = MakeUnitMap("B", "B", 1000)
-)
-
-// MetricBytes are SI byte units (1000 bytes in a kilobyte).
-type MetricBytes SI
-
-// SI base-10 byte units.
-const (
-	Kilobyte MetricBytes = 1000
-	KB                   = Kilobyte
-	Megabyte             = Kilobyte * 1000
-	MB                   = Megabyte
-	Gigabyte             = Megabyte * 1000
-	GB                   = Gigabyte
-	Terabyte             = Gigabyte * 1000
-	TB                   = Terabyte
-	Petabyte             = Terabyte * 1000
-	PB                   = Petabyte
-	Exabyte              = Petabyte * 1000
-	EB                   = Exabyte
-)
-
-// ParseMetricBytes parses base-10 metric byte units. That is, KB is 1000 bytes.
-func ParseMetricBytes(s string) (MetricBytes, error) {
-	n, err := ParseUnit(s, metricBytesUnitMap)
-	return MetricBytes(n), err
-}
-
-func (m MetricBytes) String() string {
-	return ToString(int64(m), 1000, "B", "B")
-}
-
-// ParseStrictBytes supports both iB and B suffixes for base 2 and metric,
-// respectively. That is, KiB represents 1024 and KB represents 1000.
-func ParseStrictBytes(s string) (int64, error) {
-	n, err := ParseUnit(s, bytesUnitMap)
-	if err != nil {
-		n, err = ParseUnit(s, metricBytesUnitMap)
-	}
-	return int64(n), err
-}

vendor/github.com/alecthomas/units/doc.go

@@ -1,13 +0,0 @@
-// Package units provides helpful unit multipliers and functions for Go.
-//
-// The goal of this package is to have functionality similar to the time [1] package.
-//
-//
-// [1] http://golang.org/pkg/time/
-//
-// It allows for code like this:
-//
-//     n, err := ParseBase2Bytes("1KB")
-//     // n == 1024
-//     n = units.Mebibyte * 512
-package units

vendor/github.com/alecthomas/units/si.go

@@ -1,26 +0,0 @@
-package units
-
-// SI units.
-type SI int64
-
-// SI unit multiples.
-const (
-	Kilo SI = 1000
-	Mega    = Kilo * 1000
-	Giga    = Mega * 1000
-	Tera    = Giga * 1000
-	Peta    = Tera * 1000
-	Exa     = Peta * 1000
-)
-
-func MakeUnitMap(suffix, shortSuffix string, scale int64) map[string]float64 {
-	return map[string]float64{
-		shortSuffix:  1,
-		"K" + suffix: float64(scale),
-		"M" + suffix: float64(scale * scale),
-		"G" + suffix: float64(scale * scale * scale),
-		"T" + suffix: float64(scale * scale * scale * scale),
-		"P" + suffix: float64(scale * scale * scale * scale * scale),
-		"E" + suffix: float64(scale * scale * scale * scale * scale * scale),
-	}
-}

vendor/github.com/alecthomas/units/util.go

@@ -1,138 +0,0 @@
-package units
-
-import (
-	"errors"
-	"fmt"
-	"strings"
-)
-
-var (
-	siUnits = []string{"", "K", "M", "G", "T", "P", "E"}
-)
-
-func ToString(n int64, scale int64, suffix, baseSuffix string) string {
-	mn := len(siUnits)
-	out := make([]string, mn)
-	for i, m := range siUnits {
-		if n%scale != 0 || i == 0 && n == 0 {
-			s := suffix
-			if i == 0 {
-				s = baseSuffix
-			}
-			out[mn-1-i] = fmt.Sprintf("%d%s%s", n%scale, m, s)
-		}
-		n /= scale
-		if n == 0 {
-			break
-		}
-	}
-	return strings.Join(out, "")
-}
-
-// Below code ripped straight from http://golang.org/src/pkg/time/format.go?s=33392:33438#L1123
-var errLeadingInt = errors.New("units: bad [0-9]*") // never printed
-
-// leadingInt consumes the leading [0-9]* from s.
-func leadingInt(s string) (x int64, rem string, err error) {
-	i := 0
-	for ; i < len(s); i++ {
-		c := s[i]
-		if c < '0' || c > '9' {
-			break
-		}
-		if x >= (1<<63-10)/10 {
-			// overflow
-			return 0, "", errLeadingInt
-		}
-		x = x*10 + int64(c) - '0'
-	}
-	return x, s[i:], nil
-}
-
-func ParseUnit(s string, unitMap map[string]float64) (int64, error) {
-	// [-+]?([0-9]*(\.[0-9]*)?[a-z]+)+
-	orig := s
-	f := float64(0)
-	neg := false
-
-	// Consume [-+]?
-	if s != "" {
-		c := s[0]
-		if c == '-' || c == '+' {
-			neg = c == '-'
-			s = s[1:]
-		}
-	}
-	// Special case: if all that is left is "0", this is zero.
-	if s == "0" {
-		return 0, nil
-	}
-	if s == "" {
-		return 0, errors.New("units: invalid " + orig)
-	}
-	for s != "" {
-		g := float64(0) // this element of the sequence
-
-		var x int64
-		var err error
-
-		// The next character must be [0-9.]
-		if !(s[0] == '.' || ('0' <= s[0] && s[0] <= '9')) {
-			return 0, errors.New("units: invalid " + orig)
-		}
-		// Consume [0-9]*
-		pl := len(s)
-		x, s, err = leadingInt(s)
-		if err != nil {
-			return 0, errors.New("units: invalid " + orig)
-		}
-		g = float64(x)
-		pre := pl != len(s) // whether we consumed anything before a period
-
-		// Consume (\.[0-9]*)?
-		post := false
-		if s != "" && s[0] == '.' {
-			s = s[1:]
-			pl := len(s)
-			x, s, err = leadingInt(s)
-			if err != nil {
-				return 0, errors.New("units: invalid " + orig)
-			}
-			scale := 1.0
-			for n := pl - len(s); n > 0; n-- {
-				scale *= 10
-			}
-			g += float64(x) / scale
-			post = pl != len(s)
-		}
-		if !pre && !post {
-			// no digits (e.g. ".s" or "-.s")
-			return 0, errors.New("units: invalid " + orig)
-		}
-
-		// Consume unit.
-		i := 0
-		for ; i < len(s); i++ {
-			c := s[i]
-			if c == '.' || ('0' <= c && c <= '9') {
-				break
-			}
-		}
-		u := s[:i]
-		s = s[i:]
-		unit, ok := unitMap[u]
-		if !ok {
-			return 0, errors.New("units: unknown unit " + u + " in " + orig)
-		}
-
-		f += g * unit
-	}
-
-	if neg {
-		f = -f
-	}
-	if f < float64(-1<<63) || f > float64(1<<63-1) {
-		return 0, errors.New("units: overflow parsing unit")
-	}
-	return int64(f), nil
-}

vendor/github.com/klauspost/compress/LICENSE

@@ -1,27 +0,0 @@
-Copyright (c) 2012 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/klauspost/compress/flate/copy.go

@@ -1,32 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-// forwardCopy is like the built-in copy function except that it always goes
-// forward from the start, even if the dst and src overlap.
-// It is equivalent to:
-//   for i := 0; i < n; i++ {
-//     mem[dst+i] = mem[src+i]
-//   }
-func forwardCopy(mem []byte, dst, src, n int) {
-	if dst <= src {
-		copy(mem[dst:dst+n], mem[src:src+n])
-		return
-	}
-	for {
-		if dst >= src+n {
-			copy(mem[dst:dst+n], mem[src:src+n])
-			return
-		}
-		// There is some forward overlap.  The destination
-		// will be filled with a repeated pattern of mem[src:src+k].
-		// We copy one instance of the pattern here, then repeat.
-		// Each time around this loop k will double.
-		k := dst - src
-		copy(mem[dst:dst+k], mem[src:src+k])
-		n -= k
-		dst += k
-	}
-}

vendor/github.com/klauspost/compress/flate/crc32_amd64.go

@@ -1,41 +0,0 @@
-//+build !noasm
-//+build !appengine
-
-// Copyright 2015, Klaus Post, see LICENSE for details.
-
-package flate
-
-import (
-	"github.com/klauspost/cpuid"
-)
-
-// crc32sse returns a hash for the first 4 bytes of the slice
-// len(a) must be >= 4.
-//go:noescape
-func crc32sse(a []byte) uint32
-
-// crc32sseAll calculates hashes for each 4-byte set in a.
-// dst must be east len(a) - 4 in size.
-// The size is not checked by the assembly.
-//go:noescape
-func crc32sseAll(a []byte, dst []uint32)
-
-// matchLenSSE4 returns the number of matching bytes in a and b
-// up to length 'max'. Both slices must be at least 'max'
-// bytes in size.
-//
-// TODO: drop the "SSE4" name, since it doesn't use any SSE instructions.
-//
-//go:noescape
-func matchLenSSE4(a, b []byte, max int) int
-
-// histogram accumulates a histogram of b in h.
-// h must be at least 256 entries in length,
-// and must be cleared before calling this function.
-//go:noescape
-func histogram(b []byte, h []int32)
-
-// Detect SSE 4.2 feature.
-func init() {
-	useSSE42 = cpuid.CPU.SSE42()
-}

vendor/github.com/klauspost/compress/flate/crc32_amd64.s

@@ -1,213 +0,0 @@
-//+build !noasm
-//+build !appengine
-
-// Copyright 2015, Klaus Post, see LICENSE for details.
-
-// func crc32sse(a []byte) uint32
-TEXT ·crc32sse(SB), 4, $0
-	MOVQ a+0(FP), R10
-	XORQ BX, BX
-
-	// CRC32   dword (R10), EBX
-	BYTE $0xF2; BYTE $0x41; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0x1a
-
-	MOVL BX, ret+24(FP)
-	RET
-
-// func crc32sseAll(a []byte, dst []uint32)
-TEXT ·crc32sseAll(SB), 4, $0
-	MOVQ  a+0(FP), R8      // R8: src
-	MOVQ  a_len+8(FP), R10 // input length
-	MOVQ  dst+24(FP), R9   // R9: dst
-	SUBQ  $4, R10
-	JS    end
-	JZ    one_crc
-	MOVQ  R10, R13
-	SHRQ  $2, R10          // len/4
-	ANDQ  $3, R13          // len&3
-	XORQ  BX, BX
-	ADDQ  $1, R13
-	TESTQ R10, R10
-	JZ    rem_loop
-
-crc_loop:
-	MOVQ (R8), R11
-	XORQ BX, BX
-	XORQ DX, DX
-	XORQ DI, DI
-	MOVQ R11, R12
-	SHRQ $8, R11
-	MOVQ R12, AX
-	MOVQ R11, CX
-	SHRQ $16, R12
-	SHRQ $16, R11
-	MOVQ R12, SI
-
-	// CRC32   EAX, EBX
-	BYTE $0xF2; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0xd8
-
-	// CRC32   ECX, EDX
-	BYTE $0xF2; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0xd1
-
-	// CRC32   ESI, EDI
-	BYTE $0xF2; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0xfe
-	MOVL BX, (R9)
-	MOVL DX, 4(R9)
-	MOVL DI, 8(R9)
-
-	XORQ BX, BX
-	MOVL R11, AX
-
-	// CRC32   EAX, EBX
-	BYTE $0xF2; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0xd8
-	MOVL BX, 12(R9)
-
-	ADDQ $16, R9
-	ADDQ $4, R8
-	XORQ BX, BX
-	SUBQ $1, R10
-	JNZ  crc_loop
-
-rem_loop:
-	MOVL (R8), AX
-
-	// CRC32   EAX, EBX
-	BYTE $0xF2; BYTE $0x0f
-	BYTE $0x38; BYTE $0xf1; BYTE $0xd8
-
-	MOVL BX, (R9)
-	ADDQ $4, R9
-	ADDQ $1, R8
-	XORQ BX, BX
-	SUBQ $1, R13
-	JNZ  rem_loop
-
-end:
-	RET
-
-one_crc:
-	MOVQ $1, R13
-	XORQ BX, BX
-	JMP  rem_loop
-
-// func matchLenSSE4(a, b []byte, max int) int
-TEXT ·matchLenSSE4(SB), 4, $0
-	MOVQ a_base+0(FP), SI
-	MOVQ b_base+24(FP), DI
-	MOVQ DI, DX
-	MOVQ max+48(FP), CX
-
-cmp8:
-	// As long as we are 8 or more bytes before the end of max, we can load and
-	// compare 8 bytes at a time. If those 8 bytes are equal, repeat.
-	CMPQ CX, $8
-	JLT  cmp1
-	MOVQ (SI), AX
-	MOVQ (DI), BX
-	CMPQ AX, BX
-	JNE  bsf
-	ADDQ $8, SI
-	ADDQ $8, DI
-	SUBQ $8, CX
-	JMP  cmp8
-
-bsf:
-	// If those 8 bytes were not equal, XOR the two 8 byte values, and return
-	// the index of the first byte that differs. The BSF instruction finds the
-	// least significant 1 bit, the amd64 architecture is little-endian, and
-	// the shift by 3 converts a bit index to a byte index.
-	XORQ AX, BX
-	BSFQ BX, BX
-	SHRQ $3, BX
-	ADDQ BX, DI
-
-	// Subtract off &b[0] to convert from &b[ret] to ret, and return.
-	SUBQ DX, DI
-	MOVQ DI, ret+56(FP)
-	RET
-
-cmp1:
-	// In the slices' tail, compare 1 byte at a time.
-	CMPQ CX, $0
-	JEQ  matchLenEnd
-	MOVB (SI), AX
-	MOVB (DI), BX
-	CMPB AX, BX
-	JNE  matchLenEnd
-	ADDQ $1, SI
-	ADDQ $1, DI
-	SUBQ $1, CX
-	JMP  cmp1
-
-matchLenEnd:
-	// Subtract off &b[0] to convert from &b[ret] to ret, and return.
-	SUBQ DX, DI
-	MOVQ DI, ret+56(FP)
-	RET
-
-// func histogram(b []byte, h []int32)
-TEXT ·histogram(SB), 4, $0
-	MOVQ b+0(FP), SI     // SI: &b
-	MOVQ b_len+8(FP), R9 // R9: len(b)
-	MOVQ h+24(FP), DI    // DI: Histogram
-	MOVQ R9, R8
-	SHRQ $3, R8
-	JZ   hist1
-	XORQ R11, R11
-
-loop_hist8:
-	MOVQ (SI), R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	MOVB R10, R11
-	INCL (DI)(R11*4)
-	SHRQ $8, R10
-
-	INCL (DI)(R10*4)
-
-	ADDQ $8, SI
-	DECQ R8
-	JNZ  loop_hist8
-
-hist1:
-	ANDQ $7, R9
-	JZ   end_hist
-	XORQ R10, R10
-
-loop_hist1:
-	MOVB (SI), R10
-	INCL (DI)(R10*4)
-	INCQ SI
-	DECQ R9
-	JNZ  loop_hist1
-
-end_hist:
-	RET

vendor/github.com/klauspost/compress/flate/crc32_noasm.go

@@ -1,35 +0,0 @@
-//+build !amd64 noasm appengine
-
-// Copyright 2015, Klaus Post, see LICENSE for details.
-
-package flate
-
-func init() {
-	useSSE42 = false
-}
-
-// crc32sse should never be called.
-func crc32sse(a []byte) uint32 {
-	panic("no assembler")
-}
-
-// crc32sseAll should never be called.
-func crc32sseAll(a []byte, dst []uint32) {
-	panic("no assembler")
-}
-
-// matchLenSSE4 should never be called.
-func matchLenSSE4(a, b []byte, max int) int {
-	panic("no assembler")
-	return 0
-}
-
-// histogram accumulates a histogram of b in h.
-//
-// len(h) must be >= 256, and h's elements must be all zeroes.
-func histogram(b []byte, h []int32) {
-	h = h[:256]
-	for _, t := range b {
-		h[t]++
-	}
-}

vendor/github.com/klauspost/compress/flate/dict_decoder.go

@@ -1,184 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-// dictDecoder implements the LZ77 sliding dictionary as used in decompression.
-// LZ77 decompresses data through sequences of two forms of commands:
-//
-//	* Literal insertions: Runs of one or more symbols are inserted into the data
-//	stream as is. This is accomplished through the writeByte method for a
-//	single symbol, or combinations of writeSlice/writeMark for multiple symbols.
-//	Any valid stream must start with a literal insertion if no preset dictionary
-//	is used.
-//
-//	* Backward copies: Runs of one or more symbols are copied from previously
-//	emitted data. Backward copies come as the tuple (dist, length) where dist
-//	determines how far back in the stream to copy from and length determines how
-//	many bytes to copy. Note that it is valid for the length to be greater than
-//	the distance. Since LZ77 uses forward copies, that situation is used to
-//	perform a form of run-length encoding on repeated runs of symbols.
-//	The writeCopy and tryWriteCopy are used to implement this command.
-//
-// For performance reasons, this implementation performs little to no sanity
-// checks about the arguments. As such, the invariants documented for each
-// method call must be respected.
-type dictDecoder struct {
-	hist []byte // Sliding window history
-
-	// Invariant: 0 <= rdPos <= wrPos <= len(hist)
-	wrPos int  // Current output position in buffer
-	rdPos int  // Have emitted hist[:rdPos] already
-	full  bool // Has a full window length been written yet?
-}
-
-// init initializes dictDecoder to have a sliding window dictionary of the given
-// size. If a preset dict is provided, it will initialize the dictionary with
-// the contents of dict.
-func (dd *dictDecoder) init(size int, dict []byte) {
-	*dd = dictDecoder{hist: dd.hist}
-
-	if cap(dd.hist) < size {
-		dd.hist = make([]byte, size)
-	}
-	dd.hist = dd.hist[:size]
-
-	if len(dict) > len(dd.hist) {
-		dict = dict[len(dict)-len(dd.hist):]
-	}
-	dd.wrPos = copy(dd.hist, dict)
-	if dd.wrPos == len(dd.hist) {
-		dd.wrPos = 0
-		dd.full = true
-	}
-	dd.rdPos = dd.wrPos
-}
-
-// histSize reports the total amount of historical data in the dictionary.
-func (dd *dictDecoder) histSize() int {
-	if dd.full {
-		return len(dd.hist)
-	}
-	return dd.wrPos
-}
-
-// availRead reports the number of bytes that can be flushed by readFlush.
-func (dd *dictDecoder) availRead() int {
-	return dd.wrPos - dd.rdPos
-}
-
-// availWrite reports the available amount of output buffer space.
-func (dd *dictDecoder) availWrite() int {
-	return len(dd.hist) - dd.wrPos
-}
-
-// writeSlice returns a slice of the available buffer to write data to.
-//
-// This invariant will be kept: len(s) <= availWrite()
-func (dd *dictDecoder) writeSlice() []byte {
-	return dd.hist[dd.wrPos:]
-}
-
-// writeMark advances the writer pointer by cnt.
-//
-// This invariant must be kept: 0 <= cnt <= availWrite()
-func (dd *dictDecoder) writeMark(cnt int) {
-	dd.wrPos += cnt
-}
-
-// writeByte writes a single byte to the dictionary.
-//
-// This invariant must be kept: 0 < availWrite()
-func (dd *dictDecoder) writeByte(c byte) {
-	dd.hist[dd.wrPos] = c
-	dd.wrPos++
-}
-
-// writeCopy copies a string at a given (dist, length) to the output.
-// This returns the number of bytes copied and may be less than the requested
-// length if the available space in the output buffer is too small.
-//
-// This invariant must be kept: 0 < dist <= histSize()
-func (dd *dictDecoder) writeCopy(dist, length int) int {
-	dstBase := dd.wrPos
-	dstPos := dstBase
-	srcPos := dstPos - dist
-	endPos := dstPos + length
-	if endPos > len(dd.hist) {
-		endPos = len(dd.hist)
-	}
-
-	// Copy non-overlapping section after destination position.
-	//
-	// This section is non-overlapping in that the copy length for this section
-	// is always less than or equal to the backwards distance. This can occur
-	// if a distance refers to data that wraps-around in the buffer.
-	// Thus, a backwards copy is performed here; that is, the exact bytes in
-	// the source prior to the copy is placed in the destination.
-	if srcPos < 0 {
-		srcPos += len(dd.hist)
-		dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:])
-		srcPos = 0
-	}
-
-	// Copy possibly overlapping section before destination position.
-	//
-	// This section can overlap if the copy length for this section is larger
-	// than the backwards distance. This is allowed by LZ77 so that repeated
-	// strings can be succinctly represented using (dist, length) pairs.
-	// Thus, a forwards copy is performed here; that is, the bytes copied is
-	// possibly dependent on the resulting bytes in the destination as the copy
-	// progresses along. This is functionally equivalent to the following:
-	//
-	//	for i := 0; i < endPos-dstPos; i++ {
-	//		dd.hist[dstPos+i] = dd.hist[srcPos+i]
-	//	}
-	//	dstPos = endPos
-	//
-	for dstPos < endPos {
-		dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:dstPos])
-	}
-
-	dd.wrPos = dstPos
-	return dstPos - dstBase
-}
-
-// tryWriteCopy tries to copy a string at a given (distance, length) to the
-// output. This specialized version is optimized for short distances.
-//
-// This method is designed to be inlined for performance reasons.
-//
-// This invariant must be kept: 0 < dist <= histSize()
-func (dd *dictDecoder) tryWriteCopy(dist, length int) int {
-	dstPos := dd.wrPos
-	endPos := dstPos + length
-	if dstPos < dist || endPos > len(dd.hist) {
-		return 0
-	}
-	dstBase := dstPos
-	srcPos := dstPos - dist
-
-	// Copy possibly overlapping section before destination position.
-loop:
-	dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:dstPos])
-	if dstPos < endPos {
-		goto loop // Avoid for-loop so that this function can be inlined
-	}
-
-	dd.wrPos = dstPos
-	return dstPos - dstBase
-}
-
-// readFlush returns a slice of the historical buffer that is ready to be
-// emitted to the user. The data returned by readFlush must be fully consumed
-// before calling any other dictDecoder methods.
-func (dd *dictDecoder) readFlush() []byte {
-	toRead := dd.hist[dd.rdPos:dd.wrPos]
-	dd.rdPos = dd.wrPos
-	if dd.wrPos == len(dd.hist) {
-		dd.wrPos, dd.rdPos = 0, 0
-		dd.full = true
-	}
-	return toRead
-}

vendor/github.com/klauspost/compress/flate/gen.go

@@ -1,265 +0,0 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-// This program generates fixedhuff.go
-// Invoke as
-//
-//	go run gen.go -output fixedhuff.go
-
-package main
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"go/format"
-	"io/ioutil"
-	"log"
-)
-
-var filename = flag.String("output", "fixedhuff.go", "output file name")
-
-const maxCodeLen = 16
-
-// Note: the definition of the huffmanDecoder struct is copied from
-// inflate.go, as it is private to the implementation.
-
-// chunk & 15 is number of bits
-// chunk >> 4 is value, including table link
-
-const (
-	huffmanChunkBits  = 9
-	huffmanNumChunks  = 1 << huffmanChunkBits
-	huffmanCountMask  = 15
-	huffmanValueShift = 4
-)
-
-type huffmanDecoder struct {
-	min      int                      // the minimum code length
-	chunks   [huffmanNumChunks]uint32 // chunks as described above
-	links    [][]uint32               // overflow links
-	linkMask uint32                   // mask the width of the link table
-}
-
-// Initialize Huffman decoding tables from array of code lengths.
-// Following this function, h is guaranteed to be initialized into a complete
-// tree (i.e., neither over-subscribed nor under-subscribed). The exception is a
-// degenerate case where the tree has only a single symbol with length 1. Empty
-// trees are permitted.
-func (h *huffmanDecoder) init(bits []int) bool {
-	// Sanity enables additional runtime tests during Huffman
-	// table construction.  It's intended to be used during
-	// development to supplement the currently ad-hoc unit tests.
-	const sanity = false
-
-	if h.min != 0 {
-		*h = huffmanDecoder{}
-	}
-
-	// Count number of codes of each length,
-	// compute min and max length.
-	var count [maxCodeLen]int
-	var min, max int
-	for _, n := range bits {
-		if n == 0 {
-			continue
-		}
-		if min == 0 || n < min {
-			min = n
-		}
-		if n > max {
-			max = n
-		}
-		count[n]++
-	}
-
-	// Empty tree. The decompressor.huffSym function will fail later if the tree
-	// is used. Technically, an empty tree is only valid for the HDIST tree and
-	// not the HCLEN and HLIT tree. However, a stream with an empty HCLEN tree
-	// is guaranteed to fail since it will attempt to use the tree to decode the
-	// codes for the HLIT and HDIST trees. Similarly, an empty HLIT tree is
-	// guaranteed to fail later since the compressed data section must be
-	// composed of at least one symbol (the end-of-block marker).
-	if max == 0 {
-		return true
-	}
-
-	code := 0
-	var nextcode [maxCodeLen]int
-	for i := min; i <= max; i++ {
-		code <<= 1
-		nextcode[i] = code
-		code += count[i]
-	}
-
-	// Check that the coding is complete (i.e., that we've
-	// assigned all 2-to-the-max possible bit sequences).
-	// Exception: To be compatible with zlib, we also need to
-	// accept degenerate single-code codings.  See also
-	// TestDegenerateHuffmanCoding.
-	if code != 1<<uint(max) && !(code == 1 && max == 1) {
-		return false
-	}
-
-	h.min = min
-	if max > huffmanChunkBits {
-		numLinks := 1 << (uint(max) - huffmanChunkBits)
-		h.linkMask = uint32(numLinks - 1)
-
-		// create link tables
-		link := nextcode[huffmanChunkBits+1] >> 1
-		h.links = make([][]uint32, huffmanNumChunks-link)
-		for j := uint(link); j < huffmanNumChunks; j++ {
-			reverse := int(reverseByte[j>>8]) | int(reverseByte[j&0xff])<<8
-			reverse >>= uint(16 - huffmanChunkBits)
-			off := j - uint(link)
-			if sanity && h.chunks[reverse] != 0 {
-				panic("impossible: overwriting existing chunk")
-			}
-			h.chunks[reverse] = uint32(off<<huffmanValueShift | (huffmanChunkBits + 1))
-			h.links[off] = make([]uint32, numLinks)
-		}
-	}
-
-	for i, n := range bits {
-		if n == 0 {
-			continue
-		}
-		code := nextcode[n]
-		nextcode[n]++
-		chunk := uint32(i<<huffmanValueShift | n)
-		reverse := int(reverseByte[code>>8]) | int(reverseByte[code&0xff])<<8
-		reverse >>= uint(16 - n)
-		if n <= huffmanChunkBits {
-			for off := reverse; off < len(h.chunks); off += 1 << uint(n) {
-				// We should never need to overwrite
-				// an existing chunk.  Also, 0 is
-				// never a valid chunk, because the
-				// lower 4 "count" bits should be
-				// between 1 and 15.
-				if sanity && h.chunks[off] != 0 {
-					panic("impossible: overwriting existing chunk")
-				}
-				h.chunks[off] = chunk
-			}
-		} else {
-			j := reverse & (huffmanNumChunks - 1)
-			if sanity && h.chunks[j]&huffmanCountMask != huffmanChunkBits+1 {
-				// Longer codes should have been
-				// associated with a link table above.
-				panic("impossible: not an indirect chunk")
-			}
-			value := h.chunks[j] >> huffmanValueShift
-			linktab := h.links[value]
-			reverse >>= huffmanChunkBits
-			for off := reverse; off < len(linktab); off += 1 << uint(n-huffmanChunkBits) {
-				if sanity && linktab[off] != 0 {
-					panic("impossible: overwriting existing chunk")
-				}
-				linktab[off] = chunk
-			}
-		}
-	}
-
-	if sanity {
-		// Above we've sanity checked that we never overwrote
-		// an existing entry.  Here we additionally check that
-		// we filled the tables completely.
-		for i, chunk := range h.chunks {
-			if chunk == 0 {
-				// As an exception, in the degenerate
-				// single-code case, we allow odd
-				// chunks to be missing.
-				if code == 1 && i%2 == 1 {
-					continue
-				}
-				panic("impossible: missing chunk")
-			}
-		}
-		for _, linktab := range h.links {
-			for _, chunk := range linktab {
-				if chunk == 0 {
-					panic("impossible: missing chunk")
-				}
-			}
-		}
-	}
-
-	return true
-}
-
-func main() {
-	flag.Parse()
-
-	var h huffmanDecoder
-	var bits [288]int
-	initReverseByte()
-	for i := 0; i < 144; i++ {
-		bits[i] = 8
-	}
-	for i := 144; i < 256; i++ {
-		bits[i] = 9
-	}
-	for i := 256; i < 280; i++ {
-		bits[i] = 7
-	}
-	for i := 280; i < 288; i++ {
-		bits[i] = 8
-	}
-	h.init(bits[:])
-	if h.links != nil {
-		log.Fatal("Unexpected links table in fixed Huffman decoder")
-	}
-
-	var buf bytes.Buffer
-
-	fmt.Fprintf(&buf, `// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.`+"\n\n")
-
-	fmt.Fprintln(&buf, "package flate")
-	fmt.Fprintln(&buf)
-	fmt.Fprintln(&buf, "// autogenerated by go run gen.go -output fixedhuff.go, DO NOT EDIT")
-	fmt.Fprintln(&buf)
-	fmt.Fprintln(&buf, "var fixedHuffmanDecoder = huffmanDecoder{")
-	fmt.Fprintf(&buf, "\t%d,\n", h.min)
-	fmt.Fprintln(&buf, "\t[huffmanNumChunks]uint32{")
-	for i := 0; i < huffmanNumChunks; i++ {
-		if i&7 == 0 {
-			fmt.Fprintf(&buf, "\t\t")
-		} else {
-			fmt.Fprintf(&buf, " ")
-		}
-		fmt.Fprintf(&buf, "0x%04x,", h.chunks[i])
-		if i&7 == 7 {
-			fmt.Fprintln(&buf)
-		}
-	}
-	fmt.Fprintln(&buf, "\t},")
-	fmt.Fprintln(&buf, "\tnil, 0,")
-	fmt.Fprintln(&buf, "}")
-
-	data, err := format.Source(buf.Bytes())
-	if err != nil {
-		log.Fatal(err)
-	}
-	err = ioutil.WriteFile(*filename, data, 0644)
-	if err != nil {
-		log.Fatal(err)
-	}
-}
-
-var reverseByte [256]byte
-
-func initReverseByte() {
-	for x := 0; x < 256; x++ {
-		var result byte
-		for i := uint(0); i < 8; i++ {
-			result |= byte(((x >> i) & 1) << (7 - i))
-		}
-		reverseByte[x] = result
-	}
-}

vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go

@@ -1,701 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-import (
-	"io"
-)
-
-const (
-	// The largest offset code.
-	offsetCodeCount = 30
-
-	// The special code used to mark the end of a block.
-	endBlockMarker = 256
-
-	// The first length code.
-	lengthCodesStart = 257
-
-	// The number of codegen codes.
-	codegenCodeCount = 19
-	badCode          = 255
-
-	// bufferFlushSize indicates the buffer size
-	// after which bytes are flushed to the writer.
-	// Should preferably be a multiple of 6, since
-	// we accumulate 6 bytes between writes to the buffer.
-	bufferFlushSize = 240
-
-	// bufferSize is the actual output byte buffer size.
-	// It must have additional headroom for a flush
-	// which can contain up to 8 bytes.
-	bufferSize = bufferFlushSize + 8
-)
-
-// The number of extra bits needed by length code X - LENGTH_CODES_START.
-var lengthExtraBits = []int8{
-	/* 257 */ 0, 0, 0,
-	/* 260 */ 0, 0, 0, 0, 0, 1, 1, 1, 1, 2,
-	/* 270 */ 2, 2, 2, 3, 3, 3, 3, 4, 4, 4,
-	/* 280 */ 4, 5, 5, 5, 5, 0,
-}
-
-// The length indicated by length code X - LENGTH_CODES_START.
-var lengthBase = []uint32{
-	0, 1, 2, 3, 4, 5, 6, 7, 8, 10,
-	12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
-	64, 80, 96, 112, 128, 160, 192, 224, 255,
-}
-
-// offset code word extra bits.
-var offsetExtraBits = []int8{
-	0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
-	4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
-	9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
-	/* extended window */
-	14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20,
-}
-
-var offsetBase = []uint32{
-	/* normal deflate */
-	0x000000, 0x000001, 0x000002, 0x000003, 0x000004,
-	0x000006, 0x000008, 0x00000c, 0x000010, 0x000018,
-	0x000020, 0x000030, 0x000040, 0x000060, 0x000080,
-	0x0000c0, 0x000100, 0x000180, 0x000200, 0x000300,
-	0x000400, 0x000600, 0x000800, 0x000c00, 0x001000,
-	0x001800, 0x002000, 0x003000, 0x004000, 0x006000,
-
-	/* extended window */
-	0x008000, 0x00c000, 0x010000, 0x018000, 0x020000,
-	0x030000, 0x040000, 0x060000, 0x080000, 0x0c0000,
-	0x100000, 0x180000, 0x200000, 0x300000,
-}
-
-// The odd order in which the codegen code sizes are written.
-var codegenOrder = []uint32{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}
-
-type huffmanBitWriter struct {
-	// writer is the underlying writer.
-	// Do not use it directly; use the write method, which ensures
-	// that Write errors are sticky.
-	writer io.Writer
-
-	// Data waiting to be written is bytes[0:nbytes]
-	// and then the low nbits of bits.
-	bits            uint64
-	nbits           uint
-	bytes           [bufferSize]byte
-	codegenFreq     [codegenCodeCount]int32
-	nbytes          int
-	literalFreq     []int32
-	offsetFreq      []int32
-	codegen         []uint8
-	literalEncoding *huffmanEncoder
-	offsetEncoding  *huffmanEncoder
-	codegenEncoding *huffmanEncoder
-	err             error
-}
-
-func newHuffmanBitWriter(w io.Writer) *huffmanBitWriter {
-	return &huffmanBitWriter{
-		writer:          w,
-		literalFreq:     make([]int32, maxNumLit),
-		offsetFreq:      make([]int32, offsetCodeCount),
-		codegen:         make([]uint8, maxNumLit+offsetCodeCount+1),
-		literalEncoding: newHuffmanEncoder(maxNumLit),
-		codegenEncoding: newHuffmanEncoder(codegenCodeCount),
-		offsetEncoding:  newHuffmanEncoder(offsetCodeCount),
-	}
-}
-
-func (w *huffmanBitWriter) reset(writer io.Writer) {
-	w.writer = writer
-	w.bits, w.nbits, w.nbytes, w.err = 0, 0, 0, nil
-	w.bytes = [bufferSize]byte{}
-}
-
-func (w *huffmanBitWriter) flush() {
-	if w.err != nil {
-		w.nbits = 0
-		return
-	}
-	n := w.nbytes
-	for w.nbits != 0 {
-		w.bytes[n] = byte(w.bits)
-		w.bits >>= 8
-		if w.nbits > 8 { // Avoid underflow
-			w.nbits -= 8
-		} else {
-			w.nbits = 0
-		}
-		n++
-	}
-	w.bits = 0
-	w.write(w.bytes[:n])
-	w.nbytes = 0
-}
-
-func (w *huffmanBitWriter) write(b []byte) {
-	if w.err != nil {
-		return
-	}
-	_, w.err = w.writer.Write(b)
-}
-
-func (w *huffmanBitWriter) writeBits(b int32, nb uint) {
-	if w.err != nil {
-		return
-	}
-	w.bits |= uint64(b) << w.nbits
-	w.nbits += nb
-	if w.nbits >= 48 {
-		bits := w.bits
-		w.bits >>= 48
-		w.nbits -= 48
-		n := w.nbytes
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
-		n += 6
-		if n >= bufferFlushSize {
-			w.write(w.bytes[:n])
-			n = 0
-		}
-		w.nbytes = n
-	}
-}
-
-func (w *huffmanBitWriter) writeBytes(bytes []byte) {
-	if w.err != nil {
-		return
-	}
-	n := w.nbytes
-	if w.nbits&7 != 0 {
-		w.err = InternalError("writeBytes with unfinished bits")
-		return
-	}
-	for w.nbits != 0 {
-		w.bytes[n] = byte(w.bits)
-		w.bits >>= 8
-		w.nbits -= 8
-		n++
-	}
-	if n != 0 {
-		w.write(w.bytes[:n])
-	}
-	w.nbytes = 0
-	w.write(bytes)
-}
-
-// RFC 1951 3.2.7 specifies a special run-length encoding for specifying
-// the literal and offset lengths arrays (which are concatenated into a single
-// array).  This method generates that run-length encoding.
-//
-// The result is written into the codegen array, and the frequencies
-// of each code is written into the codegenFreq array.
-// Codes 0-15 are single byte codes. Codes 16-18 are followed by additional
-// information. Code badCode is an end marker
-//
-//  numLiterals      The number of literals in literalEncoding
-//  numOffsets       The number of offsets in offsetEncoding
-//  litenc, offenc   The literal and offset encoder to use
-func (w *huffmanBitWriter) generateCodegen(numLiterals int, numOffsets int, litEnc, offEnc *huffmanEncoder) {
-	for i := range w.codegenFreq {
-		w.codegenFreq[i] = 0
-	}
-	// Note that we are using codegen both as a temporary variable for holding
-	// a copy of the frequencies, and as the place where we put the result.
-	// This is fine because the output is always shorter than the input used
-	// so far.
-	codegen := w.codegen // cache
-	// Copy the concatenated code sizes to codegen. Put a marker at the end.
-	cgnl := codegen[:numLiterals]
-	for i := range cgnl {
-		cgnl[i] = uint8(litEnc.codes[i].len)
-	}
-
-	cgnl = codegen[numLiterals : numLiterals+numOffsets]
-	for i := range cgnl {
-		cgnl[i] = uint8(offEnc.codes[i].len)
-	}
-	codegen[numLiterals+numOffsets] = badCode
-
-	size := codegen[0]
-	count := 1
-	outIndex := 0
-	for inIndex := 1; size != badCode; inIndex++ {
-		// INVARIANT: We have seen "count" copies of size that have not yet
-		// had output generated for them.
-		nextSize := codegen[inIndex]
-		if nextSize == size {
-			count++
-			continue
-		}
-		// We need to generate codegen indicating "count" of size.
-		if size != 0 {
-			codegen[outIndex] = size
-			outIndex++
-			w.codegenFreq[size]++
-			count--
-			for count >= 3 {
-				n := 6
-				if n > count {
-					n = count
-				}
-				codegen[outIndex] = 16
-				outIndex++
-				codegen[outIndex] = uint8(n - 3)
-				outIndex++
-				w.codegenFreq[16]++
-				count -= n
-			}
-		} else {
-			for count >= 11 {
-				n := 138
-				if n > count {
-					n = count
-				}
-				codegen[outIndex] = 18
-				outIndex++
-				codegen[outIndex] = uint8(n - 11)
-				outIndex++
-				w.codegenFreq[18]++
-				count -= n
-			}
-			if count >= 3 {
-				// count >= 3 && count <= 10
-				codegen[outIndex] = 17
-				outIndex++
-				codegen[outIndex] = uint8(count - 3)
-				outIndex++
-				w.codegenFreq[17]++
-				count = 0
-			}
-		}
-		count--
-		for ; count >= 0; count-- {
-			codegen[outIndex] = size
-			outIndex++
-			w.codegenFreq[size]++
-		}
-		// Set up invariant for next time through the loop.
-		size = nextSize
-		count = 1
-	}
-	// Marker indicating the end of the codegen.
-	codegen[outIndex] = badCode
-}
-
-// dynamicSize returns the size of dynamically encoded data in bits.
-func (w *huffmanBitWriter) dynamicSize(litEnc, offEnc *huffmanEncoder, extraBits int) (size, numCodegens int) {
-	numCodegens = len(w.codegenFreq)
-	for numCodegens > 4 && w.codegenFreq[codegenOrder[numCodegens-1]] == 0 {
-		numCodegens--
-	}
-	header := 3 + 5 + 5 + 4 + (3 * numCodegens) +
-		w.codegenEncoding.bitLength(w.codegenFreq[:]) +
-		int(w.codegenFreq[16])*2 +
-		int(w.codegenFreq[17])*3 +
-		int(w.codegenFreq[18])*7
-	size = header +
-		litEnc.bitLength(w.literalFreq) +
-		offEnc.bitLength(w.offsetFreq) +
-		extraBits
-
-	return size, numCodegens
-}
-
-// fixedSize returns the size of dynamically encoded data in bits.
-func (w *huffmanBitWriter) fixedSize(extraBits int) int {
-	return 3 +
-		fixedLiteralEncoding.bitLength(w.literalFreq) +
-		fixedOffsetEncoding.bitLength(w.offsetFreq) +
-		extraBits
-}
-
-// storedSize calculates the stored size, including header.
-// The function returns the size in bits and whether the block
-// fits inside a single block.
-func (w *huffmanBitWriter) storedSize(in []byte) (int, bool) {
-	if in == nil {
-		return 0, false
-	}
-	if len(in) <= maxStoreBlockSize {
-		return (len(in) + 5) * 8, true
-	}
-	return 0, false
-}
-
-func (w *huffmanBitWriter) writeCode(c hcode) {
-	if w.err != nil {
-		return
-	}
-	w.bits |= uint64(c.code) << w.nbits
-	w.nbits += uint(c.len)
-	if w.nbits >= 48 {
-		bits := w.bits
-		w.bits >>= 48
-		w.nbits -= 48
-		n := w.nbytes
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
-		n += 6
-		if n >= bufferFlushSize {
-			w.write(w.bytes[:n])
-			n = 0
-		}
-		w.nbytes = n
-	}
-}
-
-// Write the header of a dynamic Huffman block to the output stream.
-//
-//  numLiterals  The number of literals specified in codegen
-//  numOffsets   The number of offsets specified in codegen
-//  numCodegens  The number of codegens used in codegen
-func (w *huffmanBitWriter) writeDynamicHeader(numLiterals int, numOffsets int, numCodegens int, isEof bool) {
-	if w.err != nil {
-		return
-	}
-	var firstBits int32 = 4
-	if isEof {
-		firstBits = 5
-	}
-	w.writeBits(firstBits, 3)
-	w.writeBits(int32(numLiterals-257), 5)
-	w.writeBits(int32(numOffsets-1), 5)
-	w.writeBits(int32(numCodegens-4), 4)
-
-	for i := 0; i < numCodegens; i++ {
-		value := uint(w.codegenEncoding.codes[codegenOrder[i]].len)
-		w.writeBits(int32(value), 3)
-	}
-
-	i := 0
-	for {
-		var codeWord int = int(w.codegen[i])
-		i++
-		if codeWord == badCode {
-			break
-		}
-		w.writeCode(w.codegenEncoding.codes[uint32(codeWord)])
-
-		switch codeWord {
-		case 16:
-			w.writeBits(int32(w.codegen[i]), 2)
-			i++
-			break
-		case 17:
-			w.writeBits(int32(w.codegen[i]), 3)
-			i++
-			break
-		case 18:
-			w.writeBits(int32(w.codegen[i]), 7)
-			i++
-			break
-		}
-	}
-}
-
-func (w *huffmanBitWriter) writeStoredHeader(length int, isEof bool) {
-	if w.err != nil {
-		return
-	}
-	var flag int32
-	if isEof {
-		flag = 1
-	}
-	w.writeBits(flag, 3)
-	w.flush()
-	w.writeBits(int32(length), 16)
-	w.writeBits(int32(^uint16(length)), 16)
-}
-
-func (w *huffmanBitWriter) writeFixedHeader(isEof bool) {
-	if w.err != nil {
-		return
-	}
-	// Indicate that we are a fixed Huffman block
-	var value int32 = 2
-	if isEof {
-		value = 3
-	}
-	w.writeBits(value, 3)
-}
-
-// writeBlock will write a block of tokens with the smallest encoding.
-// The original input can be supplied, and if the huffman encoded data
-// is larger than the original bytes, the data will be written as a
-// stored block.
-// If the input is nil, the tokens will always be Huffman encoded.
-func (w *huffmanBitWriter) writeBlock(tokens []token, eof bool, input []byte) {
-	if w.err != nil {
-		return
-	}
-
-	tokens = append(tokens, endBlockMarker)
-	numLiterals, numOffsets := w.indexTokens(tokens)
-
-	var extraBits int
-	storedSize, storable := w.storedSize(input)
-	if storable {
-		// We only bother calculating the costs of the extra bits required by
-		// the length of offset fields (which will be the same for both fixed
-		// and dynamic encoding), if we need to compare those two encodings
-		// against stored encoding.
-		for lengthCode := lengthCodesStart + 8; lengthCode < numLiterals; lengthCode++ {
-			// First eight length codes have extra size = 0.
-			extraBits += int(w.literalFreq[lengthCode]) * int(lengthExtraBits[lengthCode-lengthCodesStart])
-		}
-		for offsetCode := 4; offsetCode < numOffsets; offsetCode++ {
-			// First four offset codes have extra size = 0.
-			extraBits += int(w.offsetFreq[offsetCode]) * int(offsetExtraBits[offsetCode])
-		}
-	}
-
-	// Figure out smallest code.
-	// Fixed Huffman baseline.
-	var literalEncoding = fixedLiteralEncoding
-	var offsetEncoding = fixedOffsetEncoding
-	var size = w.fixedSize(extraBits)
-
-	// Dynamic Huffman?
-	var numCodegens int
-
-	// Generate codegen and codegenFrequencies, which indicates how to encode
-	// the literalEncoding and the offsetEncoding.
-	w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, w.offsetEncoding)
-	w.codegenEncoding.generate(w.codegenFreq[:], 7)
-	dynamicSize, numCodegens := w.dynamicSize(w.literalEncoding, w.offsetEncoding, extraBits)
-
-	if dynamicSize < size {
-		size = dynamicSize
-		literalEncoding = w.literalEncoding
-		offsetEncoding = w.offsetEncoding
-	}
-
-	// Stored bytes?
-	if storable && storedSize < size {
-		w.writeStoredHeader(len(input), eof)
-		w.writeBytes(input)
-		return
-	}
-
-	// Huffman.
-	if literalEncoding == fixedLiteralEncoding {
-		w.writeFixedHeader(eof)
-	} else {
-		w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
-	}
-
-	// Write the tokens.
-	w.writeTokens(tokens, literalEncoding.codes, offsetEncoding.codes)
-}
-
-// writeBlockDynamic encodes a block using a dynamic Huffman table.
-// This should be used if the symbols used have a disproportionate
-// histogram distribution.
-// If input is supplied and the compression savings are below 1/16th of the
-// input size the block is stored.
-func (w *huffmanBitWriter) writeBlockDynamic(tokens []token, eof bool, input []byte) {
-	if w.err != nil {
-		return
-	}
-
-	tokens = append(tokens, endBlockMarker)
-	numLiterals, numOffsets := w.indexTokens(tokens)
-
-	// Generate codegen and codegenFrequencies, which indicates how to encode
-	// the literalEncoding and the offsetEncoding.
-	w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, w.offsetEncoding)
-	w.codegenEncoding.generate(w.codegenFreq[:], 7)
-	size, numCodegens := w.dynamicSize(w.literalEncoding, w.offsetEncoding, 0)
-
-	// Store bytes, if we don't get a reasonable improvement.
-	if ssize, storable := w.storedSize(input); storable && ssize < (size+size>>4) {
-		w.writeStoredHeader(len(input), eof)
-		w.writeBytes(input)
-		return
-	}
-
-	// Write Huffman table.
-	w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
-
-	// Write the tokens.
-	w.writeTokens(tokens, w.literalEncoding.codes, w.offsetEncoding.codes)
-}
-
-// indexTokens indexes a slice of tokens, and updates
-// literalFreq and offsetFreq, and generates literalEncoding
-// and offsetEncoding.
-// The number of literal and offset tokens is returned.
-func (w *huffmanBitWriter) indexTokens(tokens []token) (numLiterals, numOffsets int) {
-	for i := range w.literalFreq {
-		w.literalFreq[i] = 0
-	}
-	for i := range w.offsetFreq {
-		w.offsetFreq[i] = 0
-	}
-
-	for _, t := range tokens {
-		if t < matchType {
-			w.literalFreq[t.literal()]++
-			continue
-		}
-		length := t.length()
-		offset := t.offset()
-		w.literalFreq[lengthCodesStart+lengthCode(length)]++
-		w.offsetFreq[offsetCode(offset)]++
-	}
-
-	// get the number of literals
-	numLiterals = len(w.literalFreq)
-	for w.literalFreq[numLiterals-1] == 0 {
-		numLiterals--
-	}
-	// get the number of offsets
-	numOffsets = len(w.offsetFreq)
-	for numOffsets > 0 && w.offsetFreq[numOffsets-1] == 0 {
-		numOffsets--
-	}
-	if numOffsets == 0 {
-		// We haven't found a single match. If we want to go with the dynamic encoding,
-		// we should count at least one offset to be sure that the offset huffman tree could be encoded.
-		w.offsetFreq[0] = 1
-		numOffsets = 1
-	}
-	w.literalEncoding.generate(w.literalFreq, 15)
-	w.offsetEncoding.generate(w.offsetFreq, 15)
-	return
-}
-
-// writeTokens writes a slice of tokens to the output.
-// codes for literal and offset encoding must be supplied.
-func (w *huffmanBitWriter) writeTokens(tokens []token, leCodes, oeCodes []hcode) {
-	if w.err != nil {
-		return
-	}
-	for _, t := range tokens {
-		if t < matchType {
-			w.writeCode(leCodes[t.literal()])
-			continue
-		}
-		// Write the length
-		length := t.length()
-		lengthCode := lengthCode(length)
-		w.writeCode(leCodes[lengthCode+lengthCodesStart])
-		extraLengthBits := uint(lengthExtraBits[lengthCode])
-		if extraLengthBits > 0 {
-			extraLength := int32(length - lengthBase[lengthCode])
-			w.writeBits(extraLength, extraLengthBits)
-		}
-		// Write the offset
-		offset := t.offset()
-		offsetCode := offsetCode(offset)
-		w.writeCode(oeCodes[offsetCode])
-		extraOffsetBits := uint(offsetExtraBits[offsetCode])
-		if extraOffsetBits > 0 {
-			extraOffset := int32(offset - offsetBase[offsetCode])
-			w.writeBits(extraOffset, extraOffsetBits)
-		}
-	}
-}
-
-// huffOffset is a static offset encoder used for huffman only encoding.
-// It can be reused since we will not be encoding offset values.
-var huffOffset *huffmanEncoder
-
-func init() {
-	w := newHuffmanBitWriter(nil)
-	w.offsetFreq[0] = 1
-	huffOffset = newHuffmanEncoder(offsetCodeCount)
-	huffOffset.generate(w.offsetFreq, 15)
-}
-
-// writeBlockHuff encodes a block of bytes as either
-// Huffman encoded literals or uncompressed bytes if the
-// results only gains very little from compression.
-func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte) {
-	if w.err != nil {
-		return
-	}
-
-	// Clear histogram
-	for i := range w.literalFreq {
-		w.literalFreq[i] = 0
-	}
-
-	// Add everything as literals
-	histogram(input, w.literalFreq)
-
-	w.literalFreq[endBlockMarker] = 1
-
-	const numLiterals = endBlockMarker + 1
-	const numOffsets = 1
-
-	w.literalEncoding.generate(w.literalFreq, 15)
-
-	// Figure out smallest code.
-	// Always use dynamic Huffman or Store
-	var numCodegens int
-
-	// Generate codegen and codegenFrequencies, which indicates how to encode
-	// the literalEncoding and the offsetEncoding.
-	w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, huffOffset)
-	w.codegenEncoding.generate(w.codegenFreq[:], 7)
-	size, numCodegens := w.dynamicSize(w.literalEncoding, huffOffset, 0)
-
-	// Store bytes, if we don't get a reasonable improvement.
-	if ssize, storable := w.storedSize(input); storable && ssize < (size+size>>4) {
-		w.writeStoredHeader(len(input), eof)
-		w.writeBytes(input)
-		return
-	}
-
-	// Huffman.
-	w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
-	encoding := w.literalEncoding.codes[:257]
-	n := w.nbytes
-	for _, t := range input {
-		// Bitwriting inlined, ~30% speedup
-		c := encoding[t]
-		w.bits |= uint64(c.code) << w.nbits
-		w.nbits += uint(c.len)
-		if w.nbits < 48 {
-			continue
-		}
-		// Store 6 bytes
-		bits := w.bits
-		w.bits >>= 48
-		w.nbits -= 48
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
-		n += 6
-		if n < bufferFlushSize {
-			continue
-		}
-		w.write(w.bytes[:n])
-		if w.err != nil {
-			return // Return early in the event of write failures
-		}
-		n = 0
-	}
-	w.nbytes = n
-	w.writeCode(encoding[endBlockMarker])
-}

vendor/github.com/klauspost/compress/flate/huffman_code.go

@@ -1,344 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-import (
-	"math"
-	"sort"
-)
-
-// hcode is a huffman code with a bit code and bit length.
-type hcode struct {
-	code, len uint16
-}
-
-type huffmanEncoder struct {
-	codes     []hcode
-	freqcache []literalNode
-	bitCount  [17]int32
-	lns       byLiteral // stored to avoid repeated allocation in generate
-	lfs       byFreq    // stored to avoid repeated allocation in generate
-}
-
-type literalNode struct {
-	literal uint16
-	freq    int32
-}
-
-// A levelInfo describes the state of the constructed tree for a given depth.
-type levelInfo struct {
-	// Our level.  for better printing
-	level int32
-
-	// The frequency of the last node at this level
-	lastFreq int32
-
-	// The frequency of the next character to add to this level
-	nextCharFreq int32
-
-	// The frequency of the next pair (from level below) to add to this level.
-	// Only valid if the "needed" value of the next lower level is 0.
-	nextPairFreq int32
-
-	// The number of chains remaining to generate for this level before moving
-	// up to the next level
-	needed int32
-}
-
-// set sets the code and length of an hcode.
-func (h *hcode) set(code uint16, length uint16) {
-	h.len = length
-	h.code = code
-}
-
-func maxNode() literalNode { return literalNode{math.MaxUint16, math.MaxInt32} }
-
-func newHuffmanEncoder(size int) *huffmanEncoder {
-	return &huffmanEncoder{codes: make([]hcode, size)}
-}
-
-// Generates a HuffmanCode corresponding to the fixed literal table
-func generateFixedLiteralEncoding() *huffmanEncoder {
-	h := newHuffmanEncoder(maxNumLit)
-	codes := h.codes
-	var ch uint16
-	for ch = 0; ch < maxNumLit; ch++ {
-		var bits uint16
-		var size uint16
-		switch {
-		case ch < 144:
-			// size 8, 000110000  .. 10111111
-			bits = ch + 48
-			size = 8
-			break
-		case ch < 256:
-			// size 9, 110010000 .. 111111111
-			bits = ch + 400 - 144
-			size = 9
-			break
-		case ch < 280:
-			// size 7, 0000000 .. 0010111
-			bits = ch - 256
-			size = 7
-			break
-		default:
-			// size 8, 11000000 .. 11000111
-			bits = ch + 192 - 280
-			size = 8
-		}
-		codes[ch] = hcode{code: reverseBits(bits, byte(size)), len: size}
-	}
-	return h
-}
-
-func generateFixedOffsetEncoding() *huffmanEncoder {
-	h := newHuffmanEncoder(30)
-	codes := h.codes
-	for ch := range codes {
-		codes[ch] = hcode{code: reverseBits(uint16(ch), 5), len: 5}
-	}
-	return h
-}
-
-var fixedLiteralEncoding *huffmanEncoder = generateFixedLiteralEncoding()
-var fixedOffsetEncoding *huffmanEncoder = generateFixedOffsetEncoding()
-
-func (h *huffmanEncoder) bitLength(freq []int32) int {
-	var total int
-	for i, f := range freq {
-		if f != 0 {
-			total += int(f) * int(h.codes[i].len)
-		}
-	}
-	return total
-}
-
-const maxBitsLimit = 16
-
-// Return the number of literals assigned to each bit size in the Huffman encoding
-//
-// This method is only called when list.length >= 3
-// The cases of 0, 1, and 2 literals are handled by special case code.
-//
-// list  An array of the literals with non-zero frequencies
-//             and their associated frequencies. The array is in order of increasing
-//             frequency, and has as its last element a special element with frequency
-//             MaxInt32
-// maxBits     The maximum number of bits that should be used to encode any literal.
-//             Must be less than 16.
-// return      An integer array in which array[i] indicates the number of literals
-//             that should be encoded in i bits.
-func (h *huffmanEncoder) bitCounts(list []literalNode, maxBits int32) []int32 {
-	if maxBits >= maxBitsLimit {
-		panic("flate: maxBits too large")
-	}
-	n := int32(len(list))
-	list = list[0 : n+1]
-	list[n] = maxNode()
-
-	// The tree can't have greater depth than n - 1, no matter what. This
-	// saves a little bit of work in some small cases
-	if maxBits > n-1 {
-		maxBits = n - 1
-	}
-
-	// Create information about each of the levels.
-	// A bogus "Level 0" whose sole purpose is so that
-	// level1.prev.needed==0.  This makes level1.nextPairFreq
-	// be a legitimate value that never gets chosen.
-	var levels [maxBitsLimit]levelInfo
-	// leafCounts[i] counts the number of literals at the left
-	// of ancestors of the rightmost node at level i.
-	// leafCounts[i][j] is the number of literals at the left
-	// of the level j ancestor.
-	var leafCounts [maxBitsLimit][maxBitsLimit]int32
-
-	for level := int32(1); level <= maxBits; level++ {
-		// For every level, the first two items are the first two characters.
-		// We initialize the levels as if we had already figured this out.
-		levels[level] = levelInfo{
-			level:        level,
-			lastFreq:     list[1].freq,
-			nextCharFreq: list[2].freq,
-			nextPairFreq: list[0].freq + list[1].freq,
-		}
-		leafCounts[level][level] = 2
-		if level == 1 {
-			levels[level].nextPairFreq = math.MaxInt32
-		}
-	}
-
-	// We need a total of 2*n - 2 items at top level and have already generated 2.
-	levels[maxBits].needed = 2*n - 4
-
-	level := maxBits
-	for {
-		l := &levels[level]
-		if l.nextPairFreq == math.MaxInt32 && l.nextCharFreq == math.MaxInt32 {
-			// We've run out of both leafs and pairs.
-			// End all calculations for this level.
-			// To make sure we never come back to this level or any lower level,
-			// set nextPairFreq impossibly large.
-			l.needed = 0
-			levels[level+1].nextPairFreq = math.MaxInt32
-			level++
-			continue
-		}
-
-		prevFreq := l.lastFreq
-		if l.nextCharFreq < l.nextPairFreq {
-			// The next item on this row is a leaf node.
-			n := leafCounts[level][level] + 1
-			l.lastFreq = l.nextCharFreq
-			// Lower leafCounts are the same of the previous node.
-			leafCounts[level][level] = n
-			l.nextCharFreq = list[n].freq
-		} else {
-			// The next item on this row is a pair from the previous row.
-			// nextPairFreq isn't valid until we generate two
-			// more values in the level below
-			l.lastFreq = l.nextPairFreq
-			// Take leaf counts from the lower level, except counts[level] remains the same.
-			copy(leafCounts[level][:level], leafCounts[level-1][:level])
-			levels[l.level-1].needed = 2
-		}
-
-		if l.needed--; l.needed == 0 {
-			// We've done everything we need to do for this level.
-			// Continue calculating one level up. Fill in nextPairFreq
-			// of that level with the sum of the two nodes we've just calculated on
-			// this level.
-			if l.level == maxBits {
-				// All done!
-				break
-			}
-			levels[l.level+1].nextPairFreq = prevFreq + l.lastFreq
-			level++
-		} else {
-			// If we stole from below, move down temporarily to replenish it.
-			for levels[level-1].needed > 0 {
-				level--
-			}
-		}
-	}
-
-	// Somethings is wrong if at the end, the top level is null or hasn't used
-	// all of the leaves.
-	if leafCounts[maxBits][maxBits] != n {
-		panic("leafCounts[maxBits][maxBits] != n")
-	}
-
-	bitCount := h.bitCount[:maxBits+1]
-	bits := 1
-	counts := &leafCounts[maxBits]
-	for level := maxBits; level > 0; level-- {
-		// chain.leafCount gives the number of literals requiring at least "bits"
-		// bits to encode.
-		bitCount[bits] = counts[level] - counts[level-1]
-		bits++
-	}
-	return bitCount
-}
-
-// Look at the leaves and assign them a bit count and an encoding as specified
-// in RFC 1951 3.2.2
-func (h *huffmanEncoder) assignEncodingAndSize(bitCount []int32, list []literalNode) {
-	code := uint16(0)
-	for n, bits := range bitCount {
-		code <<= 1
-		if n == 0 || bits == 0 {
-			continue
-		}
-		// The literals list[len(list)-bits] .. list[len(list)-bits]
-		// are encoded using "bits" bits, and get the values
-		// code, code + 1, ....  The code values are
-		// assigned in literal order (not frequency order).
-		chunk := list[len(list)-int(bits):]
-
-		h.lns.sort(chunk)
-		for _, node := range chunk {
-			h.codes[node.literal] = hcode{code: reverseBits(code, uint8(n)), len: uint16(n)}
-			code++
-		}
-		list = list[0 : len(list)-int(bits)]
-	}
-}
-
-// Update this Huffman Code object to be the minimum code for the specified frequency count.
-//
-// freq  An array of frequencies, in which frequency[i] gives the frequency of literal i.
-// maxBits  The maximum number of bits to use for any literal.
-func (h *huffmanEncoder) generate(freq []int32, maxBits int32) {
-	if h.freqcache == nil {
-		// Allocate a reusable buffer with the longest possible frequency table.
-		// Possible lengths are codegenCodeCount, offsetCodeCount and maxNumLit.
-		// The largest of these is maxNumLit, so we allocate for that case.
-		h.freqcache = make([]literalNode, maxNumLit+1)
-	}
-	list := h.freqcache[:len(freq)+1]
-	// Number of non-zero literals
-	count := 0
-	// Set list to be the set of all non-zero literals and their frequencies
-	for i, f := range freq {
-		if f != 0 {
-			list[count] = literalNode{uint16(i), f}
-			count++
-		} else {
-			list[count] = literalNode{}
-			h.codes[i].len = 0
-		}
-	}
-	list[len(freq)] = literalNode{}
-
-	list = list[:count]
-	if count <= 2 {
-		// Handle the small cases here, because they are awkward for the general case code. With
-		// two or fewer literals, everything has bit length 1.
-		for i, node := range list {
-			// "list" is in order of increasing literal value.
-			h.codes[node.literal].set(uint16(i), 1)
-		}
-		return
-	}
-	h.lfs.sort(list)
-
-	// Get the number of literals for each bit count
-	bitCount := h.bitCounts(list, maxBits)
-	// And do the assignment
-	h.assignEncodingAndSize(bitCount, list)
-}
-
-type byLiteral []literalNode
-
-func (s *byLiteral) sort(a []literalNode) {
-	*s = byLiteral(a)
-	sort.Sort(s)
-}
-
-func (s byLiteral) Len() int { return len(s) }
-
-func (s byLiteral) Less(i, j int) bool {
-	return s[i].literal < s[j].literal
-}
-
-func (s byLiteral) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
-
-type byFreq []literalNode
-
-func (s *byFreq) sort(a []literalNode) {
-	*s = byFreq(a)
-	sort.Sort(s)
-}
-
-func (s byFreq) Len() int { return len(s) }
-
-func (s byFreq) Less(i, j int) bool {
-	if s[i].freq == s[j].freq {
-		return s[i].literal < s[j].literal
-	}
-	return s[i].freq < s[j].freq
-}
-
-func (s byFreq) Swap(i, j int) { s[i], s[j] = s[j], s[i] }

vendor/github.com/klauspost/compress/flate/inflate.go

@@ -1,846 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package flate implements the DEFLATE compressed data format, described in
-// RFC 1951.  The gzip and zlib packages implement access to DEFLATE-based file
-// formats.
-package flate
-
-import (
-	"bufio"
-	"io"
-	"strconv"
-	"sync"
-)
-
-const (
-	maxCodeLen = 16 // max length of Huffman code
-	// The next three numbers come from the RFC section 3.2.7, with the
-	// additional proviso in section 3.2.5 which implies that distance codes
-	// 30 and 31 should never occur in compressed data.
-	maxNumLit  = 286
-	maxNumDist = 30
-	numCodes   = 19 // number of codes in Huffman meta-code
-)
-
-// Initialize the fixedHuffmanDecoder only once upon first use.
-var fixedOnce sync.Once
-var fixedHuffmanDecoder huffmanDecoder
-
-// A CorruptInputError reports the presence of corrupt input at a given offset.
-type CorruptInputError int64
-
-func (e CorruptInputError) Error() string {
-	return "flate: corrupt input before offset " + strconv.FormatInt(int64(e), 10)
-}
-
-// An InternalError reports an error in the flate code itself.
-type InternalError string
-
-func (e InternalError) Error() string { return "flate: internal error: " + string(e) }
-
-// A ReadError reports an error encountered while reading input.
-//
-// Deprecated: No longer returned.
-type ReadError struct {
-	Offset int64 // byte offset where error occurred
-	Err    error // error returned by underlying Read
-}
-
-func (e *ReadError) Error() string {
-	return "flate: read error at offset " + strconv.FormatInt(e.Offset, 10) + ": " + e.Err.Error()
-}
-
-// A WriteError reports an error encountered while writing output.
-//
-// Deprecated: No longer returned.
-type WriteError struct {
-	Offset int64 // byte offset where error occurred
-	Err    error // error returned by underlying Write
-}
-
-func (e *WriteError) Error() string {
-	return "flate: write error at offset " + strconv.FormatInt(e.Offset, 10) + ": " + e.Err.Error()
-}
-
-// Resetter resets a ReadCloser returned by NewReader or NewReaderDict to
-// to switch to a new underlying Reader. This permits reusing a ReadCloser
-// instead of allocating a new one.
-type Resetter interface {
-	// Reset discards any buffered data and resets the Resetter as if it was
-	// newly initialized with the given reader.
-	Reset(r io.Reader, dict []byte) error
-}
-
-// The data structure for decoding Huffman tables is based on that of
-// zlib. There is a lookup table of a fixed bit width (huffmanChunkBits),
-// For codes smaller than the table width, there are multiple entries
-// (each combination of trailing bits has the same value). For codes
-// larger than the table width, the table contains a link to an overflow
-// table. The width of each entry in the link table is the maximum code
-// size minus the chunk width.
-//
-// Note that you can do a lookup in the table even without all bits
-// filled. Since the extra bits are zero, and the DEFLATE Huffman codes
-// have the property that shorter codes come before longer ones, the
-// bit length estimate in the result is a lower bound on the actual
-// number of bits.
-//
-// See the following:
-//	http://www.gzip.org/algorithm.txt
-
-// chunk & 15 is number of bits
-// chunk >> 4 is value, including table link
-
-const (
-	huffmanChunkBits  = 9
-	huffmanNumChunks  = 1 << huffmanChunkBits
-	huffmanCountMask  = 15
-	huffmanValueShift = 4
-)
-
-type huffmanDecoder struct {
-	min      int                      // the minimum code length
-	chunks   [huffmanNumChunks]uint32 // chunks as described above
-	links    [][]uint32               // overflow links
-	linkMask uint32                   // mask the width of the link table
-}
-
-// Initialize Huffman decoding tables from array of code lengths.
-// Following this function, h is guaranteed to be initialized into a complete
-// tree (i.e., neither over-subscribed nor under-subscribed). The exception is a
-// degenerate case where the tree has only a single symbol with length 1. Empty
-// trees are permitted.
-func (h *huffmanDecoder) init(bits []int) bool {
-	// Sanity enables additional runtime tests during Huffman
-	// table construction. It's intended to be used during
-	// development to supplement the currently ad-hoc unit tests.
-	const sanity = false
-
-	if h.min != 0 {
-		*h = huffmanDecoder{}
-	}
-
-	// Count number of codes of each length,
-	// compute min and max length.
-	var count [maxCodeLen]int
-	var min, max int
-	for _, n := range bits {
-		if n == 0 {
-			continue
-		}
-		if min == 0 || n < min {
-			min = n
-		}
-		if n > max {
-			max = n
-		}
-		count[n]++
-	}
-
-	// Empty tree. The decompressor.huffSym function will fail later if the tree
-	// is used. Technically, an empty tree is only valid for the HDIST tree and
-	// not the HCLEN and HLIT tree. However, a stream with an empty HCLEN tree
-	// is guaranteed to fail since it will attempt to use the tree to decode the
-	// codes for the HLIT and HDIST trees. Similarly, an empty HLIT tree is
-	// guaranteed to fail later since the compressed data section must be
-	// composed of at least one symbol (the end-of-block marker).
-	if max == 0 {
-		return true
-	}
-
-	code := 0
-	var nextcode [maxCodeLen]int
-	for i := min; i <= max; i++ {
-		code <<= 1
-		nextcode[i] = code
-		code += count[i]
-	}
-
-	// Check that the coding is complete (i.e., that we've
-	// assigned all 2-to-the-max possible bit sequences).
-	// Exception: To be compatible with zlib, we also need to
-	// accept degenerate single-code codings. See also
-	// TestDegenerateHuffmanCoding.
-	if code != 1<<uint(max) && !(code == 1 && max == 1) {
-		return false
-	}
-
-	h.min = min
-	if max > huffmanChunkBits {
-		numLinks := 1 << (uint(max) - huffmanChunkBits)
-		h.linkMask = uint32(numLinks - 1)
-
-		// create link tables
-		link := nextcode[huffmanChunkBits+1] >> 1
-		h.links = make([][]uint32, huffmanNumChunks-link)
-		for j := uint(link); j < huffmanNumChunks; j++ {
-			reverse := int(reverseByte[j>>8]) | int(reverseByte[j&0xff])<<8
-			reverse >>= uint(16 - huffmanChunkBits)
-			off := j - uint(link)
-			if sanity && h.chunks[reverse] != 0 {
-				panic("impossible: overwriting existing chunk")
-			}
-			h.chunks[reverse] = uint32(off<<huffmanValueShift | (huffmanChunkBits + 1))
-			h.links[off] = make([]uint32, numLinks)
-		}
-	}
-
-	for i, n := range bits {
-		if n == 0 {
-			continue
-		}
-		code := nextcode[n]
-		nextcode[n]++
-		chunk := uint32(i<<huffmanValueShift | n)
-		reverse := int(reverseByte[code>>8]) | int(reverseByte[code&0xff])<<8
-		reverse >>= uint(16 - n)
-		if n <= huffmanChunkBits {
-			for off := reverse; off < len(h.chunks); off += 1 << uint(n) {
-				// We should never need to overwrite
-				// an existing chunk. Also, 0 is
-				// never a valid chunk, because the
-				// lower 4 "count" bits should be
-				// between 1 and 15.
-				if sanity && h.chunks[off] != 0 {
-					panic("impossible: overwriting existing chunk")
-				}
-				h.chunks[off] = chunk
-			}
-		} else {
-			j := reverse & (huffmanNumChunks - 1)
-			if sanity && h.chunks[j]&huffmanCountMask != huffmanChunkBits+1 {
-				// Longer codes should have been
-				// associated with a link table above.
-				panic("impossible: not an indirect chunk")
-			}
-			value := h.chunks[j] >> huffmanValueShift
-			linktab := h.links[value]
-			reverse >>= huffmanChunkBits
-			for off := reverse; off < len(linktab); off += 1 << uint(n-huffmanChunkBits) {
-				if sanity && linktab[off] != 0 {
-					panic("impossible: overwriting existing chunk")
-				}
-				linktab[off] = chunk
-			}
-		}
-	}
-
-	if sanity {
-		// Above we've sanity checked that we never overwrote
-		// an existing entry. Here we additionally check that
-		// we filled the tables completely.
-		for i, chunk := range h.chunks {
-			if chunk == 0 {
-				// As an exception, in the degenerate
-				// single-code case, we allow odd
-				// chunks to be missing.
-				if code == 1 && i%2 == 1 {
-					continue
-				}
-				panic("impossible: missing chunk")
-			}
-		}
-		for _, linktab := range h.links {
-			for _, chunk := range linktab {
-				if chunk == 0 {
-					panic("impossible: missing chunk")
-				}
-			}
-		}
-	}
-
-	return true
-}
-
-// The actual read interface needed by NewReader.
-// If the passed in io.Reader does not also have ReadByte,
-// the NewReader will introduce its own buffering.
-type Reader interface {
-	io.Reader
-	io.ByteReader
-}
-
-// Decompress state.
-type decompressor struct {
-	// Input source.
-	r       Reader
-	roffset int64
-
-	// Input bits, in top of b.
-	b  uint32
-	nb uint
-
-	// Huffman decoders for literal/length, distance.
-	h1, h2 huffmanDecoder
-
-	// Length arrays used to define Huffman codes.
-	bits     *[maxNumLit + maxNumDist]int
-	codebits *[numCodes]int
-
-	// Output history, buffer.
-	dict dictDecoder
-
-	// Temporary buffer (avoids repeated allocation).
-	buf [4]byte
-
-	// Next step in the decompression,
-	// and decompression state.
-	step      func(*decompressor)
-	stepState int
-	final     bool
-	err       error
-	toRead    []byte
-	hl, hd    *huffmanDecoder
-	copyLen   int
-	copyDist  int
-}
-
-func (f *decompressor) nextBlock() {
-	for f.nb < 1+2 {
-		if f.err = f.moreBits(); f.err != nil {
-			return
-		}
-	}
-	f.final = f.b&1 == 1
-	f.b >>= 1
-	typ := f.b & 3
-	f.b >>= 2
-	f.nb -= 1 + 2
-	switch typ {
-	case 0:
-		f.dataBlock()
-	case 1:
-		// compressed, fixed Huffman tables
-		f.hl = &fixedHuffmanDecoder
-		f.hd = nil
-		f.huffmanBlock()
-	case 2:
-		// compressed, dynamic Huffman tables
-		if f.err = f.readHuffman(); f.err != nil {
-			break
-		}
-		f.hl = &f.h1
-		f.hd = &f.h2
-		f.huffmanBlock()
-	default:
-		// 3 is reserved.
-		f.err = CorruptInputError(f.roffset)
-	}
-}
-
-func (f *decompressor) Read(b []byte) (int, error) {
-	for {
-		if len(f.toRead) > 0 {
-			n := copy(b, f.toRead)
-			f.toRead = f.toRead[n:]
-			if len(f.toRead) == 0 {
-				return n, f.err
-			}
-			return n, nil
-		}
-		if f.err != nil {
-			return 0, f.err
-		}
-		f.step(f)
-		if f.err != nil && len(f.toRead) == 0 {
-			f.toRead = f.dict.readFlush() // Flush what's left in case of error
-		}
-	}
-}
-
-// Support the io.WriteTo interface for io.Copy and friends.
-func (f *decompressor) WriteTo(w io.Writer) (int64, error) {
-	total := int64(0)
-	flushed := false
-	for {
-		if len(f.toRead) > 0 {
-			n, err := w.Write(f.toRead)
-			total += int64(n)
-			if err != nil {
-				f.err = err
-				return total, err
-			}
-			if n != len(f.toRead) {
-				return total, io.ErrShortWrite
-			}
-			f.toRead = f.toRead[:0]
-		}
-		if f.err != nil && flushed {
-			if f.err == io.EOF {
-				return total, nil
-			}
-			return total, f.err
-		}
-		if f.err == nil {
-			f.step(f)
-		}
-		if len(f.toRead) == 0 && f.err != nil && !flushed {
-			f.toRead = f.dict.readFlush() // Flush what's left in case of error
-			flushed = true
-		}
-	}
-}
-
-func (f *decompressor) Close() error {
-	if f.err == io.EOF {
-		return nil
-	}
-	return f.err
-}
-
-// RFC 1951 section 3.2.7.
-// Compression with dynamic Huffman codes
-
-var codeOrder = [...]int{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}
-
-func (f *decompressor) readHuffman() error {
-	// HLIT[5], HDIST[5], HCLEN[4].
-	for f.nb < 5+5+4 {
-		if err := f.moreBits(); err != nil {
-			return err
-		}
-	}
-	nlit := int(f.b&0x1F) + 257
-	if nlit > maxNumLit {
-		return CorruptInputError(f.roffset)
-	}
-	f.b >>= 5
-	ndist := int(f.b&0x1F) + 1
-	if ndist > maxNumDist {
-		return CorruptInputError(f.roffset)
-	}
-	f.b >>= 5
-	nclen := int(f.b&0xF) + 4
-	// numCodes is 19, so nclen is always valid.
-	f.b >>= 4
-	f.nb -= 5 + 5 + 4
-
-	// (HCLEN+4)*3 bits: code lengths in the magic codeOrder order.
-	for i := 0; i < nclen; i++ {
-		for f.nb < 3 {
-			if err := f.moreBits(); err != nil {
-				return err
-			}
-		}
-		f.codebits[codeOrder[i]] = int(f.b & 0x7)
-		f.b >>= 3
-		f.nb -= 3
-	}
-	for i := nclen; i < len(codeOrder); i++ {
-		f.codebits[codeOrder[i]] = 0
-	}
-	if !f.h1.init(f.codebits[0:]) {
-		return CorruptInputError(f.roffset)
-	}
-
-	// HLIT + 257 code lengths, HDIST + 1 code lengths,
-	// using the code length Huffman code.
-	for i, n := 0, nlit+ndist; i < n; {
-		x, err := f.huffSym(&f.h1)
-		if err != nil {
-			return err
-		}
-		if x < 16 {
-			// Actual length.
-			f.bits[i] = x
-			i++
-			continue
-		}
-		// Repeat previous length or zero.
-		var rep int
-		var nb uint
-		var b int
-		switch x {
-		default:
-			return InternalError("unexpected length code")
-		case 16:
-			rep = 3
-			nb = 2
-			if i == 0 {
-				return CorruptInputError(f.roffset)
-			}
-			b = f.bits[i-1]
-		case 17:
-			rep = 3
-			nb = 3
-			b = 0
-		case 18:
-			rep = 11
-			nb = 7
-			b = 0
-		}
-		for f.nb < nb {
-			if err := f.moreBits(); err != nil {
-				return err
-			}
-		}
-		rep += int(f.b & uint32(1<<nb-1))
-		f.b >>= nb
-		f.nb -= nb
-		if i+rep > n {
-			return CorruptInputError(f.roffset)
-		}
-		for j := 0; j < rep; j++ {
-			f.bits[i] = b
-			i++
-		}
-	}
-
-	if !f.h1.init(f.bits[0:nlit]) || !f.h2.init(f.bits[nlit:nlit+ndist]) {
-		return CorruptInputError(f.roffset)
-	}
-
-	// As an optimization, we can initialize the min bits to read at a time
-	// for the HLIT tree to the length of the EOB marker since we know that
-	// every block must terminate with one. This preserves the property that
-	// we never read any extra bytes after the end of the DEFLATE stream.
-	if f.h1.min < f.bits[endBlockMarker] {
-		f.h1.min = f.bits[endBlockMarker]
-	}
-
-	return nil
-}
-
-// Decode a single Huffman block from f.
-// hl and hd are the Huffman states for the lit/length values
-// and the distance values, respectively. If hd == nil, using the
-// fixed distance encoding associated with fixed Huffman blocks.
-func (f *decompressor) huffmanBlock() {
-	const (
-		stateInit = iota // Zero value must be stateInit
-		stateDict
-	)
-
-	switch f.stepState {
-	case stateInit:
-		goto readLiteral
-	case stateDict:
-		goto copyHistory
-	}
-
-readLiteral:
-	// Read literal and/or (length, distance) according to RFC section 3.2.3.
-	{
-		v, err := f.huffSym(f.hl)
-		if err != nil {
-			f.err = err
-			return
-		}
-		var n uint // number of bits extra
-		var length int
-		switch {
-		case v < 256:
-			f.dict.writeByte(byte(v))
-			if f.dict.availWrite() == 0 {
-				f.toRead = f.dict.readFlush()
-				f.step = (*decompressor).huffmanBlock
-				f.stepState = stateInit
-				return
-			}
-			goto readLiteral
-		case v == 256:
-			f.finishBlock()
-			return
-		// otherwise, reference to older data
-		case v < 265:
-			length = v - (257 - 3)
-			n = 0
-		case v < 269:
-			length = v*2 - (265*2 - 11)
-			n = 1
-		case v < 273:
-			length = v*4 - (269*4 - 19)
-			n = 2
-		case v < 277:
-			length = v*8 - (273*8 - 35)
-			n = 3
-		case v < 281:
-			length = v*16 - (277*16 - 67)
-			n = 4
-		case v < 285:
-			length = v*32 - (281*32 - 131)
-			n = 5
-		case v < maxNumLit:
-			length = 258
-			n = 0
-		default:
-			f.err = CorruptInputError(f.roffset)
-			return
-		}
-		if n > 0 {
-			for f.nb < n {
-				if err = f.moreBits(); err != nil {
-					f.err = err
-					return
-				}
-			}
-			length += int(f.b & uint32(1<<n-1))
-			f.b >>= n
-			f.nb -= n
-		}
-
-		var dist int
-		if f.hd == nil {
-			for f.nb < 5 {
-				if err = f.moreBits(); err != nil {
-					f.err = err
-					return
-				}
-			}
-			dist = int(reverseByte[(f.b&0x1F)<<3])
-			f.b >>= 5
-			f.nb -= 5
-		} else {
-			if dist, err = f.huffSym(f.hd); err != nil {
-				f.err = err
-				return
-			}
-		}
-
-		switch {
-		case dist < 4:
-			dist++
-		case dist < maxNumDist:
-			nb := uint(dist-2) >> 1
-			// have 1 bit in bottom of dist, need nb more.
-			extra := (dist & 1) << nb
-			for f.nb < nb {
-				if err = f.moreBits(); err != nil {
-					f.err = err
-					return
-				}
-			}
-			extra |= int(f.b & uint32(1<<nb-1))
-			f.b >>= nb
-			f.nb -= nb
-			dist = 1<<(nb+1) + 1 + extra
-		default:
-			f.err = CorruptInputError(f.roffset)
-			return
-		}
-
-		// No check on length; encoding can be prescient.
-		if dist > f.dict.histSize() {
-			f.err = CorruptInputError(f.roffset)
-			return
-		}
-
-		f.copyLen, f.copyDist = length, dist
-		goto copyHistory
-	}
-
-copyHistory:
-	// Perform a backwards copy according to RFC section 3.2.3.
-	{
-		cnt := f.dict.tryWriteCopy(f.copyDist, f.copyLen)
-		if cnt == 0 {
-			cnt = f.dict.writeCopy(f.copyDist, f.copyLen)
-		}
-		f.copyLen -= cnt
-
-		if f.dict.availWrite() == 0 || f.copyLen > 0 {
-			f.toRead = f.dict.readFlush()
-			f.step = (*decompressor).huffmanBlock // We need to continue this work
-			f.stepState = stateDict
-			return
-		}
-		goto readLiteral
-	}
-}
-
-// Copy a single uncompressed data block from input to output.
-func (f *decompressor) dataBlock() {
-	// Uncompressed.
-	// Discard current half-byte.
-	f.nb = 0
-	f.b = 0
-
-	// Length then ones-complement of length.
-	nr, err := io.ReadFull(f.r, f.buf[0:4])
-	f.roffset += int64(nr)
-	if err != nil {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		f.err = err
-		return
-	}
-	n := int(f.buf[0]) | int(f.buf[1])<<8
-	nn := int(f.buf[2]) | int(f.buf[3])<<8
-	if uint16(nn) != uint16(^n) {
-		f.err = CorruptInputError(f.roffset)
-		return
-	}
-
-	if n == 0 {
-		f.toRead = f.dict.readFlush()
-		f.finishBlock()
-		return
-	}
-
-	f.copyLen = n
-	f.copyData()
-}
-
-// copyData copies f.copyLen bytes from the underlying reader into f.hist.
-// It pauses for reads when f.hist is full.
-func (f *decompressor) copyData() {
-	buf := f.dict.writeSlice()
-	if len(buf) > f.copyLen {
-		buf = buf[:f.copyLen]
-	}
-
-	cnt, err := io.ReadFull(f.r, buf)
-	f.roffset += int64(cnt)
-	f.copyLen -= cnt
-	f.dict.writeMark(cnt)
-	if err != nil {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		f.err = err
-		return
-	}
-
-	if f.dict.availWrite() == 0 || f.copyLen > 0 {
-		f.toRead = f.dict.readFlush()
-		f.step = (*decompressor).copyData
-		return
-	}
-	f.finishBlock()
-}
-
-func (f *decompressor) finishBlock() {
-	if f.final {
-		if f.dict.availRead() > 0 {
-			f.toRead = f.dict.readFlush()
-		}
-		f.err = io.EOF
-	}
-	f.step = (*decompressor).nextBlock
-}
-
-func (f *decompressor) moreBits() error {
-	c, err := f.r.ReadByte()
-	if err != nil {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		return err
-	}
-	f.roffset++
-	f.b |= uint32(c) << f.nb
-	f.nb += 8
-	return nil
-}
-
-// Read the next Huffman-encoded symbol from f according to h.
-func (f *decompressor) huffSym(h *huffmanDecoder) (int, error) {
-	// Since a huffmanDecoder can be empty or be composed of a degenerate tree
-	// with single element, huffSym must error on these two edge cases. In both
-	// cases, the chunks slice will be 0 for the invalid sequence, leading it
-	// satisfy the n == 0 check below.
-	n := uint(h.min)
-	for {
-		for f.nb < n {
-			if err := f.moreBits(); err != nil {
-				return 0, err
-			}
-		}
-		chunk := h.chunks[f.b&(huffmanNumChunks-1)]
-		n = uint(chunk & huffmanCountMask)
-		if n > huffmanChunkBits {
-			chunk = h.links[chunk>>huffmanValueShift][(f.b>>huffmanChunkBits)&h.linkMask]
-			n = uint(chunk & huffmanCountMask)
-		}
-		if n <= f.nb {
-			if n == 0 {
-				f.err = CorruptInputError(f.roffset)
-				return 0, f.err
-			}
-			f.b >>= n
-			f.nb -= n
-			return int(chunk >> huffmanValueShift), nil
-		}
-	}
-}
-
-func makeReader(r io.Reader) Reader {
-	if rr, ok := r.(Reader); ok {
-		return rr
-	}
-	return bufio.NewReader(r)
-}
-
-func fixedHuffmanDecoderInit() {
-	fixedOnce.Do(func() {
-		// These come from the RFC section 3.2.6.
-		var bits [288]int
-		for i := 0; i < 144; i++ {
-			bits[i] = 8
-		}
-		for i := 144; i < 256; i++ {
-			bits[i] = 9
-		}
-		for i := 256; i < 280; i++ {
-			bits[i] = 7
-		}
-		for i := 280; i < 288; i++ {
-			bits[i] = 8
-		}
-		fixedHuffmanDecoder.init(bits[:])
-	})
-}
-
-func (f *decompressor) Reset(r io.Reader, dict []byte) error {
-	*f = decompressor{
-		r:        makeReader(r),
-		bits:     f.bits,
-		codebits: f.codebits,
-		dict:     f.dict,
-		step:     (*decompressor).nextBlock,
-	}
-	f.dict.init(maxMatchOffset, dict)
-	return nil
-}
-
-// NewReader returns a new ReadCloser that can be used
-// to read the uncompressed version of r.
-// If r does not also implement io.ByteReader,
-// the decompressor may read more data than necessary from r.
-// It is the caller's responsibility to call Close on the ReadCloser
-// when finished reading.
-//
-// The ReadCloser returned by NewReader also implements Resetter.
-func NewReader(r io.Reader) io.ReadCloser {
-	fixedHuffmanDecoderInit()
-
-	var f decompressor
-	f.r = makeReader(r)
-	f.bits = new([maxNumLit + maxNumDist]int)
-	f.codebits = new([numCodes]int)
-	f.step = (*decompressor).nextBlock
-	f.dict.init(maxMatchOffset, nil)
-	return &f
-}
-
-// NewReaderDict is like NewReader but initializes the reader
-// with a preset dictionary. The returned Reader behaves as if
-// the uncompressed data stream started with the given dictionary,
-// which has already been read. NewReaderDict is typically used
-// to read data compressed by NewWriterDict.
-//
-// The ReadCloser returned by NewReader also implements Resetter.
-func NewReaderDict(r io.Reader, dict []byte) io.ReadCloser {
-	fixedHuffmanDecoderInit()
-
-	var f decompressor
-	f.r = makeReader(r)
-	f.bits = new([maxNumLit + maxNumDist]int)
-	f.codebits = new([numCodes]int)
-	f.step = (*decompressor).nextBlock
-	f.dict.init(maxMatchOffset, dict)
-	return &f
-}

vendor/github.com/klauspost/compress/flate/reverse_bits.go

@@ -1,48 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-var reverseByte = [256]byte{
-	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
-	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
-	0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
-	0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
-	0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
-	0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
-	0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
-	0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
-	0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
-	0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
-	0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
-	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
-	0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
-	0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
-	0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
-	0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
-	0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
-	0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
-	0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
-	0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
-	0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
-	0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
-	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
-	0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
-	0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
-	0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
-	0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
-	0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
-	0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
-	0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
-	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
-	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
-}
-
-func reverseUint16(v uint16) uint16 {
-	return uint16(reverseByte[v>>8]) | uint16(reverseByte[v&0xFF])<<8
-}
-
-func reverseBits(number uint16, bitLength byte) uint16 {
-	return reverseUint16(number << uint8(16-bitLength))
-}

vendor/github.com/klauspost/compress/flate/snappy.go

@@ -1,900 +0,0 @@
-// Copyright 2011 The Snappy-Go Authors. All rights reserved.
-// Modified for deflate by Klaus Post (c) 2015.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-// emitLiteral writes a literal chunk and returns the number of bytes written.
-func emitLiteral(dst *tokens, lit []byte) {
-	ol := int(dst.n)
-	for i, v := range lit {
-		dst.tokens[(i+ol)&maxStoreBlockSize] = token(v)
-	}
-	dst.n += uint16(len(lit))
-}
-
-// emitCopy writes a copy chunk and returns the number of bytes written.
-func emitCopy(dst *tokens, offset, length int) {
-	dst.tokens[dst.n] = matchToken(uint32(length-3), uint32(offset-minOffsetSize))
-	dst.n++
-}
-
-type snappyEnc interface {
-	Encode(dst *tokens, src []byte)
-	Reset()
-}
-
-func newSnappy(level int) snappyEnc {
-	switch level {
-	case 1:
-		return &snappyL1{}
-	case 2:
-		return &snappyL2{snappyGen: snappyGen{cur: maxStoreBlockSize, prev: make([]byte, 0, maxStoreBlockSize)}}
-	case 3:
-		return &snappyL3{snappyGen: snappyGen{cur: maxStoreBlockSize, prev: make([]byte, 0, maxStoreBlockSize)}}
-	case 4:
-		return &snappyL4{snappyL3{snappyGen: snappyGen{cur: maxStoreBlockSize, prev: make([]byte, 0, maxStoreBlockSize)}}}
-	default:
-		panic("invalid level specified")
-	}
-}
-
-const (
-	tableBits       = 14             // Bits used in the table
-	tableSize       = 1 << tableBits // Size of the table
-	tableMask       = tableSize - 1  // Mask for table indices. Redundant, but can eliminate bounds checks.
-	tableShift      = 32 - tableBits // Right-shift to get the tableBits most significant bits of a uint32.
-	baseMatchOffset = 1              // The smallest match offset
-	baseMatchLength = 3              // The smallest match length per the RFC section 3.2.5
-	maxMatchOffset  = 1 << 15        // The largest match offset
-)
-
-func load32(b []byte, i int) uint32 {
-	b = b[i : i+4 : len(b)] // Help the compiler eliminate bounds checks on the next line.
-	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
-}
-
-func load64(b []byte, i int) uint64 {
-	b = b[i : i+8 : len(b)] // Help the compiler eliminate bounds checks on the next line.
-	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
-		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
-}
-
-func hash(u uint32) uint32 {
-	return (u * 0x1e35a7bd) >> tableShift
-}
-
-// snappyL1 encapsulates level 1 compression
-type snappyL1 struct{}
-
-func (e *snappyL1) Reset() {}
-
-func (e *snappyL1) Encode(dst *tokens, src []byte) {
-	const (
-		inputMargin            = 16 - 1
-		minNonLiteralBlockSize = 1 + 1 + inputMargin
-	)
-
-	// This check isn't in the Snappy implementation, but there, the caller
-	// instead of the callee handles this case.
-	if len(src) < minNonLiteralBlockSize {
-		// We do not fill the token table.
-		// This will be picked up by caller.
-		dst.n = uint16(len(src))
-		return
-	}
-
-	// Initialize the hash table.
-	//
-	// The table element type is uint16, as s < sLimit and sLimit < len(src)
-	// and len(src) <= maxStoreBlockSize and maxStoreBlockSize == 65535.
-	var table [tableSize]uint16
-
-	// sLimit is when to stop looking for offset/length copies. The inputMargin
-	// lets us use a fast path for emitLiteral in the main loop, while we are
-	// looking for copies.
-	sLimit := len(src) - inputMargin
-
-	// nextEmit is where in src the next emitLiteral should start from.
-	nextEmit := 0
-
-	// The encoded form must start with a literal, as there are no previous
-	// bytes to copy, so we start looking for hash matches at s == 1.
-	s := 1
-	nextHash := hash(load32(src, s))
-
-	for {
-		// Copied from the C++ snappy implementation:
-		//
-		// Heuristic match skipping: If 32 bytes are scanned with no matches
-		// found, start looking only at every other byte. If 32 more bytes are
-		// scanned (or skipped), look at every third byte, etc.. When a match
-		// is found, immediately go back to looking at every byte. This is a
-		// small loss (~5% performance, ~0.1% density) for compressible data
-		// due to more bookkeeping, but for non-compressible data (such as
-		// JPEG) it's a huge win since the compressor quickly "realizes" the
-		// data is incompressible and doesn't bother looking for matches
-		// everywhere.
-		//
-		// The "skip" variable keeps track of how many bytes there are since
-		// the last match; dividing it by 32 (ie. right-shifting by five) gives
-		// the number of bytes to move ahead for each iteration.
-		skip := 32
-
-		nextS := s
-		candidate := 0
-		for {
-			s = nextS
-			bytesBetweenHashLookups := skip >> 5
-			nextS = s + bytesBetweenHashLookups
-			skip += bytesBetweenHashLookups
-			if nextS > sLimit {
-				goto emitRemainder
-			}
-			candidate = int(table[nextHash&tableMask])
-			table[nextHash&tableMask] = uint16(s)
-			nextHash = hash(load32(src, nextS))
-			if s-candidate <= maxMatchOffset && load32(src, s) == load32(src, candidate) {
-				break
-			}
-		}
-
-		// A 4-byte match has been found. We'll later see if more than 4 bytes
-		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
-		// them as literal bytes.
-		emitLiteral(dst, src[nextEmit:s])
-
-		// Call emitCopy, and then see if another emitCopy could be our next
-		// move. Repeat until we find no match for the input immediately after
-		// what was consumed by the last emitCopy call.
-		//
-		// If we exit this loop normally then we need to call emitLiteral next,
-		// though we don't yet know how big the literal will be. We handle that
-		// by proceeding to the next iteration of the main loop. We also can
-		// exit this loop via goto if we get close to exhausting the input.
-		for {
-			// Invariant: we have a 4-byte match at s, and no need to emit any
-			// literal bytes prior to s.
-			base := s
-
-			// Extend the 4-byte match as long as possible.
-			//
-			// This is an inlined version of Snappy's:
-			//	s = extendMatch(src, candidate+4, s+4)
-			s += 4
-			s1 := base + maxMatchLength
-			if s1 > len(src) {
-				s1 = len(src)
-			}
-			a := src[s:s1]
-			b := src[candidate+4:]
-			b = b[:len(a)]
-			l := len(a)
-			for i := range a {
-				if a[i] != b[i] {
-					l = i
-					break
-				}
-			}
-			s += l
-
-			// matchToken is flate's equivalent of Snappy's emitCopy.
-			dst.tokens[dst.n] = matchToken(uint32(s-base-baseMatchLength), uint32(base-candidate-baseMatchOffset))
-			dst.n++
-			nextEmit = s
-			if s >= sLimit {
-				goto emitRemainder
-			}
-
-			// We could immediately start working at s now, but to improve
-			// compression we first update the hash table at s-1 and at s. If
-			// another emitCopy is not our next move, also calculate nextHash
-			// at s+1. At least on GOARCH=amd64, these three hash calculations
-			// are faster as one load64 call (with some shifts) instead of
-			// three load32 calls.
-			x := load64(src, s-1)
-			prevHash := hash(uint32(x >> 0))
-			table[prevHash&tableMask] = uint16(s - 1)
-			currHash := hash(uint32(x >> 8))
-			candidate = int(table[currHash&tableMask])
-			table[currHash&tableMask] = uint16(s)
-			if s-candidate > maxMatchOffset || uint32(x>>8) != load32(src, candidate) {
-				nextHash = hash(uint32(x >> 16))
-				s++
-				break
-			}
-		}
-	}
-
-emitRemainder:
-	if nextEmit < len(src) {
-		emitLiteral(dst, src[nextEmit:])
-	}
-}
-
-type tableEntry struct {
-	val    uint32
-	offset int32
-}
-
-func load3232(b []byte, i int32) uint32 {
-	b = b[i : i+4 : len(b)] // Help the compiler eliminate bounds checks on the next line.
-	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
-}
-
-func load6432(b []byte, i int32) uint64 {
-	b = b[i : i+8 : len(b)] // Help the compiler eliminate bounds checks on the next line.
-	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
-		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
-}
-
-// snappyGen maintains the table for matches,
-// and the previous byte block for level 2.
-// This is the generic implementation.
-type snappyGen struct {
-	prev []byte
-	cur  int32
-}
-
-// snappyGen maintains the table for matches,
-// and the previous byte block for level 2.
-// This is the generic implementation.
-type snappyL2 struct {
-	snappyGen
-	table [tableSize]tableEntry
-}
-
-// EncodeL2 uses a similar algorithm to level 1, but is capable
-// of matching across blocks giving better compression at a small slowdown.
-func (e *snappyL2) Encode(dst *tokens, src []byte) {
-	const (
-		inputMargin            = 8 - 1
-		minNonLiteralBlockSize = 1 + 1 + inputMargin
-	)
-
-	// Protect against e.cur wraparound.
-	if e.cur > 1<<30 {
-		for i := range e.table[:] {
-			e.table[i] = tableEntry{}
-		}
-		e.cur = maxStoreBlockSize
-	}
-
-	// This check isn't in the Snappy implementation, but there, the caller
-	// instead of the callee handles this case.
-	if len(src) < minNonLiteralBlockSize {
-		// We do not fill the token table.
-		// This will be picked up by caller.
-		dst.n = uint16(len(src))
-		e.cur += maxStoreBlockSize
-		e.prev = e.prev[:0]
-		return
-	}
-
-	// sLimit is when to stop looking for offset/length copies. The inputMargin
-	// lets us use a fast path for emitLiteral in the main loop, while we are
-	// looking for copies.
-	sLimit := int32(len(src) - inputMargin)
-
-	// nextEmit is where in src the next emitLiteral should start from.
-	nextEmit := int32(0)
-	s := int32(0)
-	cv := load3232(src, s)
-	nextHash := hash(cv)
-
-	for {
-		// Copied from the C++ snappy implementation:
-		//
-		// Heuristic match skipping: If 32 bytes are scanned with no matches
-		// found, start looking only at every other byte. If 32 more bytes are
-		// scanned (or skipped), look at every third byte, etc.. When a match
-		// is found, immediately go back to looking at every byte. This is a
-		// small loss (~5% performance, ~0.1% density) for compressible data
-		// due to more bookkeeping, but for non-compressible data (such as
-		// JPEG) it's a huge win since the compressor quickly "realizes" the
-		// data is incompressible and doesn't bother looking for matches
-		// everywhere.
-		//
-		// The "skip" variable keeps track of how many bytes there are since
-		// the last match; dividing it by 32 (ie. right-shifting by five) gives
-		// the number of bytes to move ahead for each iteration.
-		skip := int32(32)
-
-		nextS := s
-		var candidate tableEntry
-		for {
-			s = nextS
-			bytesBetweenHashLookups := skip >> 5
-			nextS = s + bytesBetweenHashLookups
-			skip += bytesBetweenHashLookups
-			if nextS > sLimit {
-				goto emitRemainder
-			}
-			candidate = e.table[nextHash&tableMask]
-			now := load3232(src, nextS)
-			e.table[nextHash&tableMask] = tableEntry{offset: s + e.cur, val: cv}
-			nextHash = hash(now)
-
-			offset := s - (candidate.offset - e.cur)
-			if offset > maxMatchOffset || cv != candidate.val {
-				// Out of range or not matched.
-				cv = now
-				continue
-			}
-			break
-		}
-
-		// A 4-byte match has been found. We'll later see if more than 4 bytes
-		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
-		// them as literal bytes.
-		emitLiteral(dst, src[nextEmit:s])
-
-		// Call emitCopy, and then see if another emitCopy could be our next
-		// move. Repeat until we find no match for the input immediately after
-		// what was consumed by the last emitCopy call.
-		//
-		// If we exit this loop normally then we need to call emitLiteral next,
-		// though we don't yet know how big the literal will be. We handle that
-		// by proceeding to the next iteration of the main loop. We also can
-		// exit this loop via goto if we get close to exhausting the input.
-		for {
-			// Invariant: we have a 4-byte match at s, and no need to emit any
-			// literal bytes prior to s.
-
-			// Extend the 4-byte match as long as possible.
-			//
-			s += 4
-			t := candidate.offset - e.cur + 4
-			l := e.matchlen(s, t, src)
-
-			// matchToken is flate's equivalent of Snappy's emitCopy. (length,offset)
-			dst.tokens[dst.n] = matchToken(uint32(l+4-baseMatchLength), uint32(s-t-baseMatchOffset))
-			dst.n++
-			s += l
-			nextEmit = s
-			if s >= sLimit {
-				t += l
-				// Index first pair after match end.
-				if int(t+4) < len(src) && t > 0 {
-					cv := load3232(src, t)
-					e.table[hash(cv)&tableMask] = tableEntry{offset: t + e.cur, val: cv}
-				}
-				goto emitRemainder
-			}
-
-			// We could immediately start working at s now, but to improve
-			// compression we first update the hash table at s-1 and at s. If
-			// another emitCopy is not our next move, also calculate nextHash
-			// at s+1. At least on GOARCH=amd64, these three hash calculations
-			// are faster as one load64 call (with some shifts) instead of
-			// three load32 calls.
-			x := load6432(src, s-1)
-			prevHash := hash(uint32(x))
-			e.table[prevHash&tableMask] = tableEntry{offset: e.cur + s - 1, val: uint32(x)}
-			x >>= 8
-			currHash := hash(uint32(x))
-			candidate = e.table[currHash&tableMask]
-			e.table[currHash&tableMask] = tableEntry{offset: e.cur + s, val: uint32(x)}
-
-			offset := s - (candidate.offset - e.cur)
-			if offset > maxMatchOffset || uint32(x) != candidate.val {
-				cv = uint32(x >> 8)
-				nextHash = hash(cv)
-				s++
-				break
-			}
-		}
-	}
-
-emitRemainder:
-	if int(nextEmit) < len(src) {
-		emitLiteral(dst, src[nextEmit:])
-	}
-	e.cur += int32(len(src))
-	e.prev = e.prev[:len(src)]
-	copy(e.prev, src)
-}
-
-type tableEntryPrev struct {
-	Cur  tableEntry
-	Prev tableEntry
-}
-
-// snappyL3
-type snappyL3 struct {
-	snappyGen
-	table [tableSize]tableEntryPrev
-}
-
-// Encode uses a similar algorithm to level 2, will check up to two candidates.
-func (e *snappyL3) Encode(dst *tokens, src []byte) {
-	const (
-		inputMargin            = 8 - 1
-		minNonLiteralBlockSize = 1 + 1 + inputMargin
-	)
-
-	// Protect against e.cur wraparound.
-	if e.cur > 1<<30 {
-		for i := range e.table[:] {
-			e.table[i] = tableEntryPrev{}
-		}
-		e.snappyGen = snappyGen{cur: maxStoreBlockSize, prev: e.prev[:0]}
-	}
-
-	// This check isn't in the Snappy implementation, but there, the caller
-	// instead of the callee handles this case.
-	if len(src) < minNonLiteralBlockSize {
-		// We do not fill the token table.
-		// This will be picked up by caller.
-		dst.n = uint16(len(src))
-		e.cur += maxStoreBlockSize
-		e.prev = e.prev[:0]
-		return
-	}
-
-	// sLimit is when to stop looking for offset/length copies. The inputMargin
-	// lets us use a fast path for emitLiteral in the main loop, while we are
-	// looking for copies.
-	sLimit := int32(len(src) - inputMargin)
-
-	// nextEmit is where in src the next emitLiteral should start from.
-	nextEmit := int32(0)
-	s := int32(0)
-	cv := load3232(src, s)
-	nextHash := hash(cv)
-
-	for {
-		// Copied from the C++ snappy implementation:
-		//
-		// Heuristic match skipping: If 32 bytes are scanned with no matches
-		// found, start looking only at every other byte. If 32 more bytes are
-		// scanned (or skipped), look at every third byte, etc.. When a match
-		// is found, immediately go back to looking at every byte. This is a
-		// small loss (~5% performance, ~0.1% density) for compressible data
-		// due to more bookkeeping, but for non-compressible data (such as
-		// JPEG) it's a huge win since the compressor quickly "realizes" the
-		// data is incompressible and doesn't bother looking for matches
-		// everywhere.
-		//
-		// The "skip" variable keeps track of how many bytes there are since
-		// the last match; dividing it by 32 (ie. right-shifting by five) gives
-		// the number of bytes to move ahead for each iteration.
-		skip := int32(32)
-
-		nextS := s
-		var candidate tableEntry
-		for {
-			s = nextS
-			bytesBetweenHashLookups := skip >> 5
-			nextS = s + bytesBetweenHashLookups
-			skip += bytesBetweenHashLookups
-			if nextS > sLimit {
-				goto emitRemainder
-			}
-			candidates := e.table[nextHash&tableMask]
-			now := load3232(src, nextS)
-			e.table[nextHash&tableMask] = tableEntryPrev{Prev: candidates.Cur, Cur: tableEntry{offset: s + e.cur, val: cv}}
-			nextHash = hash(now)
-
-			// Check both candidates
-			candidate = candidates.Cur
-			if cv == candidate.val {
-				offset := s - (candidate.offset - e.cur)
-				if offset <= maxMatchOffset {
-					break
-				}
-			} else {
-				// We only check if value mismatches.
-				// Offset will always be invalid in other cases.
-				candidate = candidates.Prev
-				if cv == candidate.val {
-					offset := s - (candidate.offset - e.cur)
-					if offset <= maxMatchOffset {
-						break
-					}
-				}
-			}
-			cv = now
-		}
-
-		// A 4-byte match has been found. We'll later see if more than 4 bytes
-		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
-		// them as literal bytes.
-		emitLiteral(dst, src[nextEmit:s])
-
-		// Call emitCopy, and then see if another emitCopy could be our next
-		// move. Repeat until we find no match for the input immediately after
-		// what was consumed by the last emitCopy call.
-		//
-		// If we exit this loop normally then we need to call emitLiteral next,
-		// though we don't yet know how big the literal will be. We handle that
-		// by proceeding to the next iteration of the main loop. We also can
-		// exit this loop via goto if we get close to exhausting the input.
-		for {
-			// Invariant: we have a 4-byte match at s, and no need to emit any
-			// literal bytes prior to s.
-
-			// Extend the 4-byte match as long as possible.
-			//
-			s += 4
-			t := candidate.offset - e.cur + 4
-			l := e.matchlen(s, t, src)
-
-			// matchToken is flate's equivalent of Snappy's emitCopy. (length,offset)
-			dst.tokens[dst.n] = matchToken(uint32(l+4-baseMatchLength), uint32(s-t-baseMatchOffset))
-			dst.n++
-			s += l
-			nextEmit = s
-			if s >= sLimit {
-				t += l
-				// Index first pair after match end.
-				if int(t+4) < len(src) && t > 0 {
-					cv := load3232(src, t)
-					nextHash = hash(cv)
-					e.table[nextHash&tableMask] = tableEntryPrev{
-						Prev: e.table[nextHash&tableMask].Cur,
-						Cur:  tableEntry{offset: e.cur + t, val: cv},
-					}
-				}
-				goto emitRemainder
-			}
-
-			// We could immediately start working at s now, but to improve
-			// compression we first update the hash table at s-3 to s. If
-			// another emitCopy is not our next move, also calculate nextHash
-			// at s+1. At least on GOARCH=amd64, these three hash calculations
-			// are faster as one load64 call (with some shifts) instead of
-			// three load32 calls.
-			x := load6432(src, s-3)
-			prevHash := hash(uint32(x))
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 3, val: uint32(x)},
-			}
-			x >>= 8
-			prevHash = hash(uint32(x))
-
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 2, val: uint32(x)},
-			}
-			x >>= 8
-			prevHash = hash(uint32(x))
-
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 1, val: uint32(x)},
-			}
-			x >>= 8
-			currHash := hash(uint32(x))
-			candidates := e.table[currHash&tableMask]
-			cv = uint32(x)
-			e.table[currHash&tableMask] = tableEntryPrev{
-				Prev: candidates.Cur,
-				Cur:  tableEntry{offset: s + e.cur, val: cv},
-			}
-
-			// Check both candidates
-			candidate = candidates.Cur
-			if cv == candidate.val {
-				offset := s - (candidate.offset - e.cur)
-				if offset <= maxMatchOffset {
-					continue
-				}
-			} else {
-				// We only check if value mismatches.
-				// Offset will always be invalid in other cases.
-				candidate = candidates.Prev
-				if cv == candidate.val {
-					offset := s - (candidate.offset - e.cur)
-					if offset <= maxMatchOffset {
-						continue
-					}
-				}
-			}
-			cv = uint32(x >> 8)
-			nextHash = hash(cv)
-			s++
-			break
-		}
-	}
-
-emitRemainder:
-	if int(nextEmit) < len(src) {
-		emitLiteral(dst, src[nextEmit:])
-	}
-	e.cur += int32(len(src))
-	e.prev = e.prev[:len(src)]
-	copy(e.prev, src)
-}
-
-// snappyL4
-type snappyL4 struct {
-	snappyL3
-}
-
-// Encode uses a similar algorithm to level 3,
-// but will check up to two candidates if first isn't long enough.
-func (e *snappyL4) Encode(dst *tokens, src []byte) {
-	const (
-		inputMargin            = 8 - 3
-		minNonLiteralBlockSize = 1 + 1 + inputMargin
-		matchLenGood           = 12
-	)
-
-	// Protect against e.cur wraparound.
-	if e.cur > 1<<30 {
-		for i := range e.table[:] {
-			e.table[i] = tableEntryPrev{}
-		}
-		e.snappyGen = snappyGen{cur: maxStoreBlockSize, prev: e.prev[:0]}
-	}
-
-	// This check isn't in the Snappy implementation, but there, the caller
-	// instead of the callee handles this case.
-	if len(src) < minNonLiteralBlockSize {
-		// We do not fill the token table.
-		// This will be picked up by caller.
-		dst.n = uint16(len(src))
-		e.cur += maxStoreBlockSize
-		e.prev = e.prev[:0]
-		return
-	}
-
-	// sLimit is when to stop looking for offset/length copies. The inputMargin
-	// lets us use a fast path for emitLiteral in the main loop, while we are
-	// looking for copies.
-	sLimit := int32(len(src) - inputMargin)
-
-	// nextEmit is where in src the next emitLiteral should start from.
-	nextEmit := int32(0)
-	s := int32(0)
-	cv := load3232(src, s)
-	nextHash := hash(cv)
-
-	for {
-		// Copied from the C++ snappy implementation:
-		//
-		// Heuristic match skipping: If 32 bytes are scanned with no matches
-		// found, start looking only at every other byte. If 32 more bytes are
-		// scanned (or skipped), look at every third byte, etc.. When a match
-		// is found, immediately go back to looking at every byte. This is a
-		// small loss (~5% performance, ~0.1% density) for compressible data
-		// due to more bookkeeping, but for non-compressible data (such as
-		// JPEG) it's a huge win since the compressor quickly "realizes" the
-		// data is incompressible and doesn't bother looking for matches
-		// everywhere.
-		//
-		// The "skip" variable keeps track of how many bytes there are since
-		// the last match; dividing it by 32 (ie. right-shifting by five) gives
-		// the number of bytes to move ahead for each iteration.
-		skip := int32(32)
-
-		nextS := s
-		var candidate tableEntry
-		var candidateAlt tableEntry
-		for {
-			s = nextS
-			bytesBetweenHashLookups := skip >> 5
-			nextS = s + bytesBetweenHashLookups
-			skip += bytesBetweenHashLookups
-			if nextS > sLimit {
-				goto emitRemainder
-			}
-			candidates := e.table[nextHash&tableMask]
-			now := load3232(src, nextS)
-			e.table[nextHash&tableMask] = tableEntryPrev{Prev: candidates.Cur, Cur: tableEntry{offset: s + e.cur, val: cv}}
-			nextHash = hash(now)
-
-			// Check both candidates
-			candidate = candidates.Cur
-			if cv == candidate.val {
-				offset := s - (candidate.offset - e.cur)
-				if offset < maxMatchOffset {
-					offset = s - (candidates.Prev.offset - e.cur)
-					if cv == candidates.Prev.val && offset < maxMatchOffset {
-						candidateAlt = candidates.Prev
-					}
-					break
-				}
-			} else {
-				// We only check if value mismatches.
-				// Offset will always be invalid in other cases.
-				candidate = candidates.Prev
-				if cv == candidate.val {
-					offset := s - (candidate.offset - e.cur)
-					if offset < maxMatchOffset {
-						break
-					}
-				}
-			}
-			cv = now
-		}
-
-		// A 4-byte match has been found. We'll later see if more than 4 bytes
-		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
-		// them as literal bytes.
-		emitLiteral(dst, src[nextEmit:s])
-
-		// Call emitCopy, and then see if another emitCopy could be our next
-		// move. Repeat until we find no match for the input immediately after
-		// what was consumed by the last emitCopy call.
-		//
-		// If we exit this loop normally then we need to call emitLiteral next,
-		// though we don't yet know how big the literal will be. We handle that
-		// by proceeding to the next iteration of the main loop. We also can
-		// exit this loop via goto if we get close to exhausting the input.
-		for {
-			// Invariant: we have a 4-byte match at s, and no need to emit any
-			// literal bytes prior to s.
-
-			// Extend the 4-byte match as long as possible.
-			//
-			s += 4
-			t := candidate.offset - e.cur + 4
-			l := e.matchlen(s, t, src)
-			// Try alternative candidate if match length < matchLenGood.
-			if l < matchLenGood-4 && candidateAlt.offset != 0 {
-				t2 := candidateAlt.offset - e.cur + 4
-				l2 := e.matchlen(s, t2, src)
-				if l2 > l {
-					l = l2
-					t = t2
-				}
-			}
-			// matchToken is flate's equivalent of Snappy's emitCopy. (length,offset)
-			dst.tokens[dst.n] = matchToken(uint32(l+4-baseMatchLength), uint32(s-t-baseMatchOffset))
-			dst.n++
-			s += l
-			nextEmit = s
-			if s >= sLimit {
-				t += l
-				// Index first pair after match end.
-				if int(t+4) < len(src) && t > 0 {
-					cv := load3232(src, t)
-					nextHash = hash(cv)
-					e.table[nextHash&tableMask] = tableEntryPrev{
-						Prev: e.table[nextHash&tableMask].Cur,
-						Cur:  tableEntry{offset: e.cur + t, val: cv},
-					}
-				}
-				goto emitRemainder
-			}
-
-			// We could immediately start working at s now, but to improve
-			// compression we first update the hash table at s-3 to s. If
-			// another emitCopy is not our next move, also calculate nextHash
-			// at s+1. At least on GOARCH=amd64, these three hash calculations
-			// are faster as one load64 call (with some shifts) instead of
-			// three load32 calls.
-			x := load6432(src, s-3)
-			prevHash := hash(uint32(x))
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 3, val: uint32(x)},
-			}
-			x >>= 8
-			prevHash = hash(uint32(x))
-
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 2, val: uint32(x)},
-			}
-			x >>= 8
-			prevHash = hash(uint32(x))
-
-			e.table[prevHash&tableMask] = tableEntryPrev{
-				Prev: e.table[prevHash&tableMask].Cur,
-				Cur:  tableEntry{offset: e.cur + s - 1, val: uint32(x)},
-			}
-			x >>= 8
-			currHash := hash(uint32(x))
-			candidates := e.table[currHash&tableMask]
-			cv = uint32(x)
-			e.table[currHash&tableMask] = tableEntryPrev{
-				Prev: candidates.Cur,
-				Cur:  tableEntry{offset: s + e.cur, val: cv},
-			}
-
-			// Check both candidates
-			candidate = candidates.Cur
-			candidateAlt = tableEntry{}
-			if cv == candidate.val {
-				offset := s - (candidate.offset - e.cur)
-				if offset <= maxMatchOffset {
-					offset = s - (candidates.Prev.offset - e.cur)
-					if cv == candidates.Prev.val && offset <= maxMatchOffset {
-						candidateAlt = candidates.Prev
-					}
-					continue
-				}
-			} else {
-				// We only check if value mismatches.
-				// Offset will always be invalid in other cases.
-				candidate = candidates.Prev
-				if cv == candidate.val {
-					offset := s - (candidate.offset - e.cur)
-					if offset <= maxMatchOffset {
-						continue
-					}
-				}
-			}
-			cv = uint32(x >> 8)
-			nextHash = hash(cv)
-			s++
-			break
-		}
-	}
-
-emitRemainder:
-	if int(nextEmit) < len(src) {
-		emitLiteral(dst, src[nextEmit:])
-	}
-	e.cur += int32(len(src))
-	e.prev = e.prev[:len(src)]
-	copy(e.prev, src)
-}
-
-func (e *snappyGen) matchlen(s, t int32, src []byte) int32 {
-	s1 := int(s) + maxMatchLength - 4
-	if s1 > len(src) {
-		s1 = len(src)
-	}
-
-	// If we are inside the current block
-	if t >= 0 {
-		b := src[t:]
-		a := src[s:s1]
-		b = b[:len(a)]
-		// Extend the match to be as long as possible.
-		for i := range a {
-			if a[i] != b[i] {
-				return int32(i)
-			}
-		}
-		return int32(len(a))
-	}
-
-	// We found a match in the previous block.
-	tp := int32(len(e.prev)) + t
-	if tp < 0 {
-		return 0
-	}
-
-	// Extend the match to be as long as possible.
-	a := src[s:s1]
-	b := e.prev[tp:]
-	if len(b) > len(a) {
-		b = b[:len(a)]
-	}
-	a = a[:len(b)]
-	for i := range b {
-		if a[i] != b[i] {
-			return int32(i)
-		}
-	}
-
-	// If we reached our limit, we matched everything we are
-	// allowed to in the previous block and we return.
-	n := int32(len(b))
-	if int(s+n) == s1 {
-		return n
-	}
-
-	// Continue looking for more matches in the current block.
-	a = src[s+n : s1]
-	b = src[:len(a)]
-	for i := range a {
-		if a[i] != b[i] {
-			return int32(i) + n
-		}
-	}
-	return int32(len(a)) + n
-}
-
-// Reset the encoding table.
-func (e *snappyGen) Reset() {
-	e.prev = e.prev[:0]
-	e.cur += maxMatchOffset
-}

vendor/github.com/klauspost/compress/flate/token.go

@@ -1,115 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-import "fmt"
-
-const (
-	// 2 bits:   type   0 = literal  1=EOF  2=Match   3=Unused
-	// 8 bits:   xlength = length - MIN_MATCH_LENGTH
-	// 22 bits   xoffset = offset - MIN_OFFSET_SIZE, or literal
-	lengthShift = 22
-	offsetMask  = 1<<lengthShift - 1
-	typeMask    = 3 << 30
-	literalType = 0 << 30
-	matchType   = 1 << 30
-)
-
-// The length code for length X (MIN_MATCH_LENGTH <= X <= MAX_MATCH_LENGTH)
-// is lengthCodes[length - MIN_MATCH_LENGTH]
-var lengthCodes = [...]uint32{
-	0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
-	9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
-	13, 13, 13, 13, 14, 14, 14, 14, 15, 15,
-	15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
-	17, 17, 17, 17, 17, 17, 17, 17, 18, 18,
-	18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
-	19, 19, 19, 19, 20, 20, 20, 20, 20, 20,
-	20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-	21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
-	21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
-	22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
-	22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
-	23, 23, 23, 23, 23, 23, 23, 23, 24, 24,
-	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-	25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
-	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-	26, 26, 26, 26, 27, 27, 27, 27, 27, 27,
-	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-	27, 27, 27, 27, 27, 28,
-}
-
-var offsetCodes = [...]uint32{
-	0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
-	8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
-	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
-	11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
-	12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
-	12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
-	13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
-	13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
-	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-}
-
-type token uint32
-
-type tokens struct {
-	tokens [maxStoreBlockSize + 1]token
-	n      uint16 // Must be able to contain maxStoreBlockSize
-}
-
-// Convert a literal into a literal token.
-func literalToken(literal uint32) token { return token(literalType + literal) }
-
-// Convert a < xlength, xoffset > pair into a match token.
-func matchToken(xlength uint32, xoffset uint32) token {
-	return token(matchType + xlength<<lengthShift + xoffset)
-}
-
-func matchTokend(xlength uint32, xoffset uint32) token {
-	if xlength > maxMatchLength || xoffset > maxMatchOffset {
-		panic(fmt.Sprintf("Invalid match: len: %d, offset: %d\n", xlength, xoffset))
-		return token(matchType)
-	}
-	return token(matchType + xlength<<lengthShift + xoffset)
-}
-
-// Returns the type of a token
-func (t token) typ() uint32 { return uint32(t) & typeMask }
-
-// Returns the literal of a literal token
-func (t token) literal() uint32 { return uint32(t - literalType) }
-
-// Returns the extra offset of a match token
-func (t token) offset() uint32 { return uint32(t) & offsetMask }
-
-func (t token) length() uint32 { return uint32((t - matchType) >> lengthShift) }
-
-func lengthCode(len uint32) uint32 { return lengthCodes[len] }
-
-// Returns the offset code corresponding to a specific offset
-func offsetCode(off uint32) uint32 {
-	if off < uint32(len(offsetCodes)) {
-		return offsetCodes[off]
-	} else if off>>7 < uint32(len(offsetCodes)) {
-		return offsetCodes[off>>7] + 14
-	} else {
-		return offsetCodes[off>>14] + 28
-	}
-}

vendor/github.com/klauspost/compress/gzip/gunzip.go

@@ -1,344 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package gzip implements reading and writing of gzip format compressed files,
-// as specified in RFC 1952.
-package gzip
-
-import (
-	"bufio"
-	"encoding/binary"
-	"errors"
-	"io"
-	"time"
-
-	"github.com/klauspost/compress/flate"
-	"github.com/klauspost/crc32"
-)
-
-const (
-	gzipID1     = 0x1f
-	gzipID2     = 0x8b
-	gzipDeflate = 8
-	flagText    = 1 << 0
-	flagHdrCrc  = 1 << 1
-	flagExtra   = 1 << 2
-	flagName    = 1 << 3
-	flagComment = 1 << 4
-)
-
-var (
-	// ErrChecksum is returned when reading GZIP data that has an invalid checksum.
-	ErrChecksum = errors.New("gzip: invalid checksum")
-	// ErrHeader is returned when reading GZIP data that has an invalid header.
-	ErrHeader = errors.New("gzip: invalid header")
-)
-
-var le = binary.LittleEndian
-
-// noEOF converts io.EOF to io.ErrUnexpectedEOF.
-func noEOF(err error) error {
-	if err == io.EOF {
-		return io.ErrUnexpectedEOF
-	}
-	return err
-}
-
-// The gzip file stores a header giving metadata about the compressed file.
-// That header is exposed as the fields of the Writer and Reader structs.
-//
-// Strings must be UTF-8 encoded and may only contain Unicode code points
-// U+0001 through U+00FF, due to limitations of the GZIP file format.
-type Header struct {
-	Comment string    // comment
-	Extra   []byte    // "extra data"
-	ModTime time.Time // modification time
-	Name    string    // file name
-	OS      byte      // operating system type
-}
-
-// A Reader is an io.Reader that can be read to retrieve
-// uncompressed data from a gzip-format compressed file.
-//
-// In general, a gzip file can be a concatenation of gzip files,
-// each with its own header. Reads from the Reader
-// return the concatenation of the uncompressed data of each.
-// Only the first header is recorded in the Reader fields.
-//
-// Gzip files store a length and checksum of the uncompressed data.
-// The Reader will return a ErrChecksum when Read
-// reaches the end of the uncompressed data if it does not
-// have the expected length or checksum. Clients should treat data
-// returned by Read as tentative until they receive the io.EOF
-// marking the end of the data.
-type Reader struct {
-	Header       // valid after NewReader or Reader.Reset
-	r            flate.Reader
-	decompressor io.ReadCloser
-	digest       uint32 // CRC-32, IEEE polynomial (section 8)
-	size         uint32 // Uncompressed size (section 2.3.1)
-	buf          [512]byte
-	err          error
-	multistream  bool
-}
-
-// NewReader creates a new Reader reading the given reader.
-// If r does not also implement io.ByteReader,
-// the decompressor may read more data than necessary from r.
-//
-// It is the caller's responsibility to call Close on the Reader when done.
-//
-// The Reader.Header fields will be valid in the Reader returned.
-func NewReader(r io.Reader) (*Reader, error) {
-	z := new(Reader)
-	if err := z.Reset(r); err != nil {
-		return nil, err
-	}
-	return z, nil
-}
-
-// Reset discards the Reader z's state and makes it equivalent to the
-// result of its original state from NewReader, but reading from r instead.
-// This permits reusing a Reader rather than allocating a new one.
-func (z *Reader) Reset(r io.Reader) error {
-	*z = Reader{
-		decompressor: z.decompressor,
-		multistream:  true,
-	}
-	if rr, ok := r.(flate.Reader); ok {
-		z.r = rr
-	} else {
-		z.r = bufio.NewReader(r)
-	}
-	z.Header, z.err = z.readHeader()
-	return z.err
-}
-
-// Multistream controls whether the reader supports multistream files.
-//
-// If enabled (the default), the Reader expects the input to be a sequence
-// of individually gzipped data streams, each with its own header and
-// trailer, ending at EOF. The effect is that the concatenation of a sequence
-// of gzipped files is treated as equivalent to the gzip of the concatenation
-// of the sequence. This is standard behavior for gzip readers.
-//
-// Calling Multistream(false) disables this behavior; disabling the behavior
-// can be useful when reading file formats that distinguish individual gzip
-// data streams or mix gzip data streams with other data streams.
-// In this mode, when the Reader reaches the end of the data stream,
-// Read returns io.EOF. If the underlying reader implements io.ByteReader,
-// it will be left positioned just after the gzip stream.
-// To start the next stream, call z.Reset(r) followed by z.Multistream(false).
-// If there is no next stream, z.Reset(r) will return io.EOF.
-func (z *Reader) Multistream(ok bool) {
-	z.multistream = ok
-}
-
-// readString reads a NUL-terminated string from z.r.
-// It treats the bytes read as being encoded as ISO 8859-1 (Latin-1) and
-// will output a string encoded using UTF-8.
-// This method always updates z.digest with the data read.
-func (z *Reader) readString() (string, error) {
-	var err error
-	needConv := false
-	for i := 0; ; i++ {
-		if i >= len(z.buf) {
-			return "", ErrHeader
-		}
-		z.buf[i], err = z.r.ReadByte()
-		if err != nil {
-			return "", err
-		}
-		if z.buf[i] > 0x7f {
-			needConv = true
-		}
-		if z.buf[i] == 0 {
-			// Digest covers the NUL terminator.
-			z.digest = crc32.Update(z.digest, crc32.IEEETable, z.buf[:i+1])
-
-			// Strings are ISO 8859-1, Latin-1 (RFC 1952, section 2.3.1).
-			if needConv {
-				s := make([]rune, 0, i)
-				for _, v := range z.buf[:i] {
-					s = append(s, rune(v))
-				}
-				return string(s), nil
-			}
-			return string(z.buf[:i]), nil
-		}
-	}
-}
-
-// readHeader reads the GZIP header according to section 2.3.1.
-// This method does not set z.err.
-func (z *Reader) readHeader() (hdr Header, err error) {
-	if _, err = io.ReadFull(z.r, z.buf[:10]); err != nil {
-		// RFC 1952, section 2.2, says the following:
-		//	A gzip file consists of a series of "members" (compressed data sets).
-		//
-		// Other than this, the specification does not clarify whether a
-		// "series" is defined as "one or more" or "zero or more". To err on the
-		// side of caution, Go interprets this to mean "zero or more".
-		// Thus, it is okay to return io.EOF here.
-		return hdr, err
-	}
-	if z.buf[0] != gzipID1 || z.buf[1] != gzipID2 || z.buf[2] != gzipDeflate {
-		return hdr, ErrHeader
-	}
-	flg := z.buf[3]
-	hdr.ModTime = time.Unix(int64(le.Uint32(z.buf[4:8])), 0)
-	// z.buf[8] is XFL and is currently ignored.
-	hdr.OS = z.buf[9]
-	z.digest = crc32.ChecksumIEEE(z.buf[:10])
-
-	if flg&flagExtra != 0 {
-		if _, err = io.ReadFull(z.r, z.buf[:2]); err != nil {
-			return hdr, noEOF(err)
-		}
-		z.digest = crc32.Update(z.digest, crc32.IEEETable, z.buf[:2])
-		data := make([]byte, le.Uint16(z.buf[:2]))
-		if _, err = io.ReadFull(z.r, data); err != nil {
-			return hdr, noEOF(err)
-		}
-		z.digest = crc32.Update(z.digest, crc32.IEEETable, data)
-		hdr.Extra = data
-	}
-
-	var s string
-	if flg&flagName != 0 {
-		if s, err = z.readString(); err != nil {
-			return hdr, err
-		}
-		hdr.Name = s
-	}
-
-	if flg&flagComment != 0 {
-		if s, err = z.readString(); err != nil {
-			return hdr, err
-		}
-		hdr.Comment = s
-	}
-
-	if flg&flagHdrCrc != 0 {
-		if _, err = io.ReadFull(z.r, z.buf[:2]); err != nil {
-			return hdr, noEOF(err)
-		}
-		digest := le.Uint16(z.buf[:2])
-		if digest != uint16(z.digest) {
-			return hdr, ErrHeader
-		}
-	}
-
-	z.digest = 0
-	if z.decompressor == nil {
-		z.decompressor = flate.NewReader(z.r)
-	} else {
-		z.decompressor.(flate.Resetter).Reset(z.r, nil)
-	}
-	return hdr, nil
-}
-
-// Read implements io.Reader, reading uncompressed bytes from its underlying Reader.
-func (z *Reader) Read(p []byte) (n int, err error) {
-	if z.err != nil {
-		return 0, z.err
-	}
-
-	n, z.err = z.decompressor.Read(p)
-	z.digest = crc32.Update(z.digest, crc32.IEEETable, p[:n])
-	z.size += uint32(n)
-	if z.err != io.EOF {
-		// In the normal case we return here.
-		return n, z.err
-	}
-
-	// Finished file; check checksum and size.
-	if _, err := io.ReadFull(z.r, z.buf[:8]); err != nil {
-		z.err = noEOF(err)
-		return n, z.err
-	}
-	digest := le.Uint32(z.buf[:4])
-	size := le.Uint32(z.buf[4:8])
-	if digest != z.digest || size != z.size {
-		z.err = ErrChecksum
-		return n, z.err
-	}
-	z.digest, z.size = 0, 0
-
-	// File is ok; check if there is another.
-	if !z.multistream {
-		return n, io.EOF
-	}
-	z.err = nil // Remove io.EOF
-
-	if _, z.err = z.readHeader(); z.err != nil {
-		return n, z.err
-	}
-
-	// Read from next file, if necessary.
-	if n > 0 {
-		return n, nil
-	}
-	return z.Read(p)
-}
-
-// Support the io.WriteTo interface for io.Copy and friends.
-func (z *Reader) WriteTo(w io.Writer) (int64, error) {
-	total := int64(0)
-	crcWriter := crc32.NewIEEE()
-	for {
-		if z.err != nil {
-			if z.err == io.EOF {
-				return total, nil
-			}
-			return total, z.err
-		}
-
-		// We write both to output and digest.
-		mw := io.MultiWriter(w, crcWriter)
-		n, err := z.decompressor.(io.WriterTo).WriteTo(mw)
-		total += n
-		z.size += uint32(n)
-		if err != nil {
-			z.err = err
-			return total, z.err
-		}
-
-		// Finished file; check checksum + size.
-		if _, err := io.ReadFull(z.r, z.buf[0:8]); err != nil {
-			if err == io.EOF {
-				err = io.ErrUnexpectedEOF
-			}
-			z.err = err
-			return total, err
-		}
-		z.digest = crcWriter.Sum32()
-		digest := le.Uint32(z.buf[:4])
-		size := le.Uint32(z.buf[4:8])
-		if digest != z.digest || size != z.size {
-			z.err = ErrChecksum
-			return total, z.err
-		}
-		z.digest, z.size = 0, 0
-
-		// File is ok; check if there is another.
-		if !z.multistream {
-			return total, nil
-		}
-		crcWriter.Reset()
-		z.err = nil // Remove io.EOF
-
-		if _, z.err = z.readHeader(); z.err != nil {
-			if z.err == io.EOF {
-				return total, nil
-			}
-			return total, z.err
-		}
-	}
-}
-
-// Close closes the Reader. It does not close the underlying io.Reader.
-// In order for the GZIP checksum to be verified, the reader must be
-// fully consumed until the io.EOF.
-func (z *Reader) Close() error { return z.decompressor.Close() }

vendor/github.com/klauspost/compress/gzip/gzip.go

@@ -1,251 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package gzip
-
-import (
-	"errors"
-	"fmt"
-	"io"
-
-	"github.com/klauspost/compress/flate"
-	"github.com/klauspost/crc32"
-)
-
-// These constants are copied from the flate package, so that code that imports
-// "compress/gzip" does not also have to import "compress/flate".
-const (
-	NoCompression       = flate.NoCompression
-	BestSpeed           = flate.BestSpeed
-	BestCompression     = flate.BestCompression
-	DefaultCompression  = flate.DefaultCompression
-	ConstantCompression = flate.ConstantCompression
-	HuffmanOnly         = flate.HuffmanOnly
-)
-
-// A Writer is an io.WriteCloser.
-// Writes to a Writer are compressed and written to w.
-type Writer struct {
-	Header      // written at first call to Write, Flush, or Close
-	w           io.Writer
-	level       int
-	wroteHeader bool
-	compressor  *flate.Writer
-	digest      uint32 // CRC-32, IEEE polynomial (section 8)
-	size        uint32 // Uncompressed size (section 2.3.1)
-	closed      bool
-	buf         [10]byte
-	err         error
-}
-
-// NewWriter returns a new Writer.
-// Writes to the returned writer are compressed and written to w.
-//
-// It is the caller's responsibility to call Close on the WriteCloser when done.
-// Writes may be buffered and not flushed until Close.
-//
-// Callers that wish to set the fields in Writer.Header must do so before
-// the first call to Write, Flush, or Close.
-func NewWriter(w io.Writer) *Writer {
-	z, _ := NewWriterLevel(w, DefaultCompression)
-	return z
-}
-
-// NewWriterLevel is like NewWriter but specifies the compression level instead
-// of assuming DefaultCompression.
-//
-// The compression level can be DefaultCompression, NoCompression, or any
-// integer value between BestSpeed and BestCompression inclusive. The error
-// returned will be nil if the level is valid.
-func NewWriterLevel(w io.Writer, level int) (*Writer, error) {
-	if level < HuffmanOnly || level > BestCompression {
-		return nil, fmt.Errorf("gzip: invalid compression level: %d", level)
-	}
-	z := new(Writer)
-	z.init(w, level)
-	return z, nil
-}
-
-func (z *Writer) init(w io.Writer, level int) {
-	compressor := z.compressor
-	if compressor != nil {
-		compressor.Reset(w)
-	}
-	*z = Writer{
-		Header: Header{
-			OS: 255, // unknown
-		},
-		w:          w,
-		level:      level,
-		compressor: compressor,
-	}
-}
-
-// Reset discards the Writer z's state and makes it equivalent to the
-// result of its original state from NewWriter or NewWriterLevel, but
-// writing to w instead. This permits reusing a Writer rather than
-// allocating a new one.
-func (z *Writer) Reset(w io.Writer) {
-	z.init(w, z.level)
-}
-
-// writeBytes writes a length-prefixed byte slice to z.w.
-func (z *Writer) writeBytes(b []byte) error {
-	if len(b) > 0xffff {
-		return errors.New("gzip.Write: Extra data is too large")
-	}
-	le.PutUint16(z.buf[:2], uint16(len(b)))
-	_, err := z.w.Write(z.buf[:2])
-	if err != nil {
-		return err
-	}
-	_, err = z.w.Write(b)
-	return err
-}
-
-// writeString writes a UTF-8 string s in GZIP's format to z.w.
-// GZIP (RFC 1952) specifies that strings are NUL-terminated ISO 8859-1 (Latin-1).
-func (z *Writer) writeString(s string) (err error) {
-	// GZIP stores Latin-1 strings; error if non-Latin-1; convert if non-ASCII.
-	needconv := false
-	for _, v := range s {
-		if v == 0 || v > 0xff {
-			return errors.New("gzip.Write: non-Latin-1 header string")
-		}
-		if v > 0x7f {
-			needconv = true
-		}
-	}
-	if needconv {
-		b := make([]byte, 0, len(s))
-		for _, v := range s {
-			b = append(b, byte(v))
-		}
-		_, err = z.w.Write(b)
-	} else {
-		_, err = io.WriteString(z.w, s)
-	}
-	if err != nil {
-		return err
-	}
-	// GZIP strings are NUL-terminated.
-	z.buf[0] = 0
-	_, err = z.w.Write(z.buf[:1])
-	return err
-}
-
-// Write writes a compressed form of p to the underlying io.Writer. The
-// compressed bytes are not necessarily flushed until the Writer is closed.
-func (z *Writer) Write(p []byte) (int, error) {
-	if z.err != nil {
-		return 0, z.err
-	}
-	var n int
-	// Write the GZIP header lazily.
-	if !z.wroteHeader {
-		z.wroteHeader = true
-		z.buf[0] = gzipID1
-		z.buf[1] = gzipID2
-		z.buf[2] = gzipDeflate
-		z.buf[3] = 0
-		if z.Extra != nil {
-			z.buf[3] |= 0x04
-		}
-		if z.Name != "" {
-			z.buf[3] |= 0x08
-		}
-		if z.Comment != "" {
-			z.buf[3] |= 0x10
-		}
-		le.PutUint32(z.buf[4:8], uint32(z.ModTime.Unix()))
-		if z.level == BestCompression {
-			z.buf[8] = 2
-		} else if z.level == BestSpeed {
-			z.buf[8] = 4
-		} else {
-			z.buf[8] = 0
-		}
-		z.buf[9] = z.OS
-		n, z.err = z.w.Write(z.buf[:10])
-		if z.err != nil {
-			return n, z.err
-		}
-		if z.Extra != nil {
-			z.err = z.writeBytes(z.Extra)
-			if z.err != nil {
-				return n, z.err
-			}
-		}
-		if z.Name != "" {
-			z.err = z.writeString(z.Name)
-			if z.err != nil {
-				return n, z.err
-			}
-		}
-		if z.Comment != "" {
-			z.err = z.writeString(z.Comment)
-			if z.err != nil {
-				return n, z.err
-			}
-		}
-		if z.compressor == nil {
-			z.compressor, _ = flate.NewWriter(z.w, z.level)
-		}
-	}
-	z.size += uint32(len(p))
-	z.digest = crc32.Update(z.digest, crc32.IEEETable, p)
-	n, z.err = z.compressor.Write(p)
-	return n, z.err
-}
-
-// Flush flushes any pending compressed data to the underlying writer.
-//
-// It is useful mainly in compressed network protocols, to ensure that
-// a remote reader has enough data to reconstruct a packet. Flush does
-// not return until the data has been written. If the underlying
-// writer returns an error, Flush returns that error.
-//
-// In the terminology of the zlib library, Flush is equivalent to Z_SYNC_FLUSH.
-func (z *Writer) Flush() error {
-	if z.err != nil {
-		return z.err
-	}
-	if z.closed {
-		return nil
-	}
-	if !z.wroteHeader {
-		z.Write(nil)
-		if z.err != nil {
-			return z.err
-		}
-	}
-	z.err = z.compressor.Flush()
-	return z.err
-}
-
-// Close closes the Writer, flushing any unwritten data to the underlying
-// io.Writer, but does not close the underlying io.Writer.
-func (z *Writer) Close() error {
-	if z.err != nil {
-		return z.err
-	}
-	if z.closed {
-		return nil
-	}
-	z.closed = true
-	if !z.wroteHeader {
-		z.Write(nil)
-		if z.err != nil {
-			return z.err
-		}
-	}
-	z.err = z.compressor.Close()
-	if z.err != nil {
-		return z.err
-	}
-	le.PutUint32(z.buf[:4], z.digest)
-	le.PutUint32(z.buf[4:8], z.size)
-	_, z.err = z.w.Write(z.buf[:8])
-	return z.err
-}

vendor/github.com/klauspost/compress/zlib/reader.go

@@ -1,178 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-/*
-Package zlib implements reading and writing of zlib format compressed data,
-as specified in RFC 1950.
-
-The implementation provides filters that uncompress during reading
-and compress during writing.  For example, to write compressed data
-to a buffer:
-
-	var b bytes.Buffer
-	w := zlib.NewWriter(&b)
-	w.Write([]byte("hello, world\n"))
-	w.Close()
-
-and to read that data back:
-
-	r, err := zlib.NewReader(&b)
-	io.Copy(os.Stdout, r)
-	r.Close()
-*/
-package zlib
-
-import (
-	"bufio"
-	"errors"
-	"hash"
-	"hash/adler32"
-	"io"
-
-	"github.com/klauspost/compress/flate"
-)
-
-const zlibDeflate = 8
-
-var (
-	// ErrChecksum is returned when reading ZLIB data that has an invalid checksum.
-	ErrChecksum = errors.New("zlib: invalid checksum")
-	// ErrDictionary is returned when reading ZLIB data that has an invalid dictionary.
-	ErrDictionary = errors.New("zlib: invalid dictionary")
-	// ErrHeader is returned when reading ZLIB data that has an invalid header.
-	ErrHeader = errors.New("zlib: invalid header")
-)
-
-type reader struct {
-	r            flate.Reader
-	decompressor io.ReadCloser
-	digest       hash.Hash32
-	err          error
-	scratch      [4]byte
-}
-
-// Resetter resets a ReadCloser returned by NewReader or NewReaderDict to
-// to switch to a new underlying Reader. This permits reusing a ReadCloser
-// instead of allocating a new one.
-type Resetter interface {
-	// Reset discards any buffered data and resets the Resetter as if it was
-	// newly initialized with the given reader.
-	Reset(r io.Reader, dict []byte) error
-}
-
-// NewReader creates a new ReadCloser.
-// Reads from the returned ReadCloser read and decompress data from r.
-// If r does not implement io.ByteReader, the decompressor may read more
-// data than necessary from r.
-// It is the caller's responsibility to call Close on the ReadCloser when done.
-//
-// The ReadCloser returned by NewReader also implements Resetter.
-func NewReader(r io.Reader) (io.ReadCloser, error) {
-	return NewReaderDict(r, nil)
-}
-
-// NewReaderDict is like NewReader but uses a preset dictionary.
-// NewReaderDict ignores the dictionary if the compressed data does not refer to it.
-// If the compressed data refers to a different dictionary, NewReaderDict returns ErrDictionary.
-//
-// The ReadCloser returned by NewReaderDict also implements Resetter.
-func NewReaderDict(r io.Reader, dict []byte) (io.ReadCloser, error) {
-	z := new(reader)
-	err := z.Reset(r, dict)
-	if err != nil {
-		return nil, err
-	}
-	return z, nil
-}
-
-func (z *reader) Read(p []byte) (int, error) {
-	if z.err != nil {
-		return 0, z.err
-	}
-
-	var n int
-	n, z.err = z.decompressor.Read(p)
-	z.digest.Write(p[0:n])
-	if z.err != io.EOF {
-		// In the normal case we return here.
-		return n, z.err
-	}
-
-	// Finished file; check checksum.
-	if _, err := io.ReadFull(z.r, z.scratch[0:4]); err != nil {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		z.err = err
-		return n, z.err
-	}
-	// ZLIB (RFC 1950) is big-endian, unlike GZIP (RFC 1952).
-	checksum := uint32(z.scratch[0])<<24 | uint32(z.scratch[1])<<16 | uint32(z.scratch[2])<<8 | uint32(z.scratch[3])
-	if checksum != z.digest.Sum32() {
-		z.err = ErrChecksum
-		return n, z.err
-	}
-	return n, io.EOF
-}
-
-// Calling Close does not close the wrapped io.Reader originally passed to NewReader.
-// In order for the ZLIB checksum to be verified, the reader must be
-// fully consumed until the io.EOF.
-func (z *reader) Close() error {
-	if z.err != nil && z.err != io.EOF {
-		return z.err
-	}
-	z.err = z.decompressor.Close()
-	return z.err
-}
-
-func (z *reader) Reset(r io.Reader, dict []byte) error {
-	*z = reader{decompressor: z.decompressor}
-	if fr, ok := r.(flate.Reader); ok {
-		z.r = fr
-	} else {
-		z.r = bufio.NewReader(r)
-	}
-
-	// Read the header (RFC 1950 section 2.2.).
-	_, z.err = io.ReadFull(z.r, z.scratch[0:2])
-	if z.err != nil {
-		if z.err == io.EOF {
-			z.err = io.ErrUnexpectedEOF
-		}
-		return z.err
-	}
-	h := uint(z.scratch[0])<<8 | uint(z.scratch[1])
-	if (z.scratch[0]&0x0f != zlibDeflate) || (h%31 != 0) {
-		z.err = ErrHeader
-		return z.err
-	}
-	haveDict := z.scratch[1]&0x20 != 0
-	if haveDict {
-		_, z.err = io.ReadFull(z.r, z.scratch[0:4])
-		if z.err != nil {
-			if z.err == io.EOF {
-				z.err = io.ErrUnexpectedEOF
-			}
-			return z.err
-		}
-		checksum := uint32(z.scratch[0])<<24 | uint32(z.scratch[1])<<16 | uint32(z.scratch[2])<<8 | uint32(z.scratch[3])
-		if checksum != adler32.Checksum(dict) {
-			z.err = ErrDictionary
-			return z.err
-		}
-	}
-
-	if z.decompressor == nil {
-		if haveDict {
-			z.decompressor = flate.NewReaderDict(z.r, dict)
-		} else {
-			z.decompressor = flate.NewReader(z.r)
-		}
-	} else {
-		z.decompressor.(flate.Resetter).Reset(z.r, dict)
-	}
-	z.digest = adler32.New()
-	return nil
-}

vendor/github.com/klauspost/compress/zlib/writer.go

@@ -1,201 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package zlib
-
-import (
-	"fmt"
-	"hash"
-	"hash/adler32"
-	"io"
-
-	"github.com/klauspost/compress/flate"
-)
-
-// These constants are copied from the flate package, so that code that imports
-// "compress/zlib" does not also have to import "compress/flate".
-const (
-	NoCompression       = flate.NoCompression
-	BestSpeed           = flate.BestSpeed
-	BestCompression     = flate.BestCompression
-	DefaultCompression  = flate.DefaultCompression
-	ConstantCompression = flate.ConstantCompression
-	HuffmanOnly         = flate.HuffmanOnly
-)
-
-// A Writer takes data written to it and writes the compressed
-// form of that data to an underlying writer (see NewWriter).
-type Writer struct {
-	w           io.Writer
-	level       int
-	dict        []byte
-	compressor  *flate.Writer
-	digest      hash.Hash32
-	err         error
-	scratch     [4]byte
-	wroteHeader bool
-}
-
-// NewWriter creates a new Writer.
-// Writes to the returned Writer are compressed and written to w.
-//
-// It is the caller's responsibility to call Close on the WriteCloser when done.
-// Writes may be buffered and not flushed until Close.
-func NewWriter(w io.Writer) *Writer {
-	z, _ := NewWriterLevelDict(w, DefaultCompression, nil)
-	return z
-}
-
-// NewWriterLevel is like NewWriter but specifies the compression level instead
-// of assuming DefaultCompression.
-//
-// The compression level can be DefaultCompression, NoCompression, HuffmanOnly
-// or any integer value between BestSpeed and BestCompression inclusive.
-// The error returned will be nil if the level is valid.
-func NewWriterLevel(w io.Writer, level int) (*Writer, error) {
-	return NewWriterLevelDict(w, level, nil)
-}
-
-// NewWriterLevelDict is like NewWriterLevel but specifies a dictionary to
-// compress with.
-//
-// The dictionary may be nil. If not, its contents should not be modified until
-// the Writer is closed.
-func NewWriterLevelDict(w io.Writer, level int, dict []byte) (*Writer, error) {
-	if level < HuffmanOnly || level > BestCompression {
-		return nil, fmt.Errorf("zlib: invalid compression level: %d", level)
-	}
-	return &Writer{
-		w:     w,
-		level: level,
-		dict:  dict,
-	}, nil
-}
-
-// Reset clears the state of the Writer z such that it is equivalent to its
-// initial state from NewWriterLevel or NewWriterLevelDict, but instead writing
-// to w.
-func (z *Writer) Reset(w io.Writer) {
-	z.w = w
-	// z.level and z.dict left unchanged.
-	if z.compressor != nil {
-		z.compressor.Reset(w)
-	}
-	if z.digest != nil {
-		z.digest.Reset()
-	}
-	z.err = nil
-	z.scratch = [4]byte{}
-	z.wroteHeader = false
-}
-
-// writeHeader writes the ZLIB header.
-func (z *Writer) writeHeader() (err error) {
-	z.wroteHeader = true
-	// ZLIB has a two-byte header (as documented in RFC 1950).
-	// The first four bits is the CINFO (compression info), which is 7 for the default deflate window size.
-	// The next four bits is the CM (compression method), which is 8 for deflate.
-	z.scratch[0] = 0x78
-	// The next two bits is the FLEVEL (compression level). The four values are:
-	// 0=fastest, 1=fast, 2=default, 3=best.
-	// The next bit, FDICT, is set if a dictionary is given.
-	// The final five FCHECK bits form a mod-31 checksum.
-	switch z.level {
-	case -2, 0, 1:
-		z.scratch[1] = 0 << 6
-	case 2, 3, 4, 5:
-		z.scratch[1] = 1 << 6
-	case 6, -1:
-		z.scratch[1] = 2 << 6
-	case 7, 8, 9:
-		z.scratch[1] = 3 << 6
-	default:
-		panic("unreachable")
-	}
-	if z.dict != nil {
-		z.scratch[1] |= 1 << 5
-	}
-	z.scratch[1] += uint8(31 - (uint16(z.scratch[0])<<8+uint16(z.scratch[1]))%31)
-	if _, err = z.w.Write(z.scratch[0:2]); err != nil {
-		return err
-	}
-	if z.dict != nil {
-		// The next four bytes are the Adler-32 checksum of the dictionary.
-		checksum := adler32.Checksum(z.dict)
-		z.scratch[0] = uint8(checksum >> 24)
-		z.scratch[1] = uint8(checksum >> 16)
-		z.scratch[2] = uint8(checksum >> 8)
-		z.scratch[3] = uint8(checksum >> 0)
-		if _, err = z.w.Write(z.scratch[0:4]); err != nil {
-			return err
-		}
-	}
-	if z.compressor == nil {
-		// Initialize deflater unless the Writer is being reused
-		// after a Reset call.
-		z.compressor, err = flate.NewWriterDict(z.w, z.level, z.dict)
-		if err != nil {
-			return err
-		}
-		z.digest = adler32.New()
-	}
-	return nil
-}
-
-// Write writes a compressed form of p to the underlying io.Writer. The
-// compressed bytes are not necessarily flushed until the Writer is closed or
-// explicitly flushed.
-func (z *Writer) Write(p []byte) (n int, err error) {
-	if !z.wroteHeader {
-		z.err = z.writeHeader()
-	}
-	if z.err != nil {
-		return 0, z.err
-	}
-	if len(p) == 0 {
-		return 0, nil
-	}
-	n, err = z.compressor.Write(p)
-	if err != nil {
-		z.err = err
-		return
-	}
-	z.digest.Write(p)
-	return
-}
-
-// Flush flushes the Writer to its underlying io.Writer.
-func (z *Writer) Flush() error {
-	if !z.wroteHeader {
-		z.err = z.writeHeader()
-	}
-	if z.err != nil {
-		return z.err
-	}
-	z.err = z.compressor.Flush()
-	return z.err
-}
-
-// Close closes the Writer, flushing any unwritten data to the underlying
-// io.Writer, but does not close the underlying io.Writer.
-func (z *Writer) Close() error {
-	if !z.wroteHeader {
-		z.err = z.writeHeader()
-	}
-	if z.err != nil {
-		return z.err
-	}
-	z.err = z.compressor.Close()
-	if z.err != nil {
-		return z.err
-	}
-	checksum := z.digest.Sum32()
-	// ZLIB (RFC 1950) is big-endian, unlike GZIP (RFC 1952).
-	z.scratch[0] = uint8(checksum >> 24)
-	z.scratch[1] = uint8(checksum >> 16)
-	z.scratch[2] = uint8(checksum >> 8)
-	z.scratch[3] = uint8(checksum >> 0)
-	_, z.err = z.w.Write(z.scratch[0:4])
-	return z.err
-}

vendor/github.com/klauspost/cpuid/LICENSE

@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2015 Klaus Post
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-

vendor/github.com/klauspost/cpuid/README.md

@@ -1,145 +0,0 @@
-# cpuid
-Package cpuid provides information about the CPU running the current program.
-
-CPU features are detected on startup, and kept for fast access through the life of the application.
-Currently x86 / x64 (AMD64) is supported, and no external C (cgo) code is used, which should make the library very easy to use.
-
-You can access the CPU information by accessing the shared CPU variable of the cpuid library.
-
-Package home: https://github.com/klauspost/cpuid
-
-[![GoDoc][1]][2] [![Build Status][3]][4]
-
-[1]: https://godoc.org/github.com/klauspost/cpuid?status.svg
-[2]: https://godoc.org/github.com/klauspost/cpuid
-[3]: https://travis-ci.org/klauspost/cpuid.svg
-[4]: https://travis-ci.org/klauspost/cpuid
-
-# features
-## CPU Instructions
-*  **CMOV** (i686 CMOV)
-*  **NX** (NX (No-Execute) bit)
-*  **AMD3DNOW** (AMD 3DNOW)
-*  **AMD3DNOWEXT** (AMD 3DNowExt)
-*  **MMX** (standard MMX)
-*  **MMXEXT** (SSE integer functions or AMD MMX ext)
-*  **SSE** (SSE functions)
-*  **SSE2** (P4 SSE functions)
-*  **SSE3** (Prescott SSE3 functions)
-*  **SSSE3** (Conroe SSSE3 functions)
-*  **SSE4** (Penryn SSE4.1 functions)
-*  **SSE4A** (AMD Barcelona microarchitecture SSE4a instructions)
-*  **SSE42** (Nehalem SSE4.2 functions)
-*  **AVX** (AVX functions)
-*  **AVX2** (AVX2 functions)
-*  **FMA3** (Intel FMA 3)
-*  **FMA4** (Bulldozer FMA4 functions)
-*  **XOP** (Bulldozer XOP functions)
-*  **F16C** (Half-precision floating-point conversion)
-*  **BMI1** (Bit Manipulation Instruction Set 1)
-*  **BMI2** (Bit Manipulation Instruction Set 2)
-*  **TBM** (AMD Trailing Bit Manipulation)
-*  **LZCNT** (LZCNT instruction)
-*  **POPCNT** (POPCNT instruction)
-*  **AESNI** (Advanced Encryption Standard New Instructions)
-*  **CLMUL** (Carry-less Multiplication)
-*  **HTT** (Hyperthreading (enabled))
-*  **HLE** (Hardware Lock Elision)
-*  **RTM** (Restricted Transactional Memory)
-*  **RDRAND** (RDRAND instruction is available)
-*  **RDSEED** (RDSEED instruction is available)
-*  **ADX** (Intel ADX (Multi-Precision Add-Carry Instruction Extensions))
-*  **SHA** (Intel SHA Extensions)
-*  **AVX512F** (AVX-512 Foundation)
-*  **AVX512DQ** (AVX-512 Doubleword and Quadword Instructions)
-*  **AVX512IFMA** (AVX-512 Integer Fused Multiply-Add Instructions)
-*  **AVX512PF** (AVX-512 Prefetch Instructions)
-*  **AVX512ER** (AVX-512 Exponential and Reciprocal Instructions)
-*  **AVX512CD** (AVX-512 Conflict Detection Instructions)
-*  **AVX512BW** (AVX-512 Byte and Word Instructions)
-*  **AVX512VL** (AVX-512 Vector Length Extensions)
-*  **AVX512VBMI** (AVX-512 Vector Bit Manipulation Instructions)
-*  **MPX** (Intel MPX (Memory Protection Extensions))
-*  **ERMS** (Enhanced REP MOVSB/STOSB)
-*  **RDTSCP** (RDTSCP Instruction)
-*  **CX16** (CMPXCHG16B Instruction)
-*  **SGX** (Software Guard Extensions, with activation details)
-
-## Performance
-*  **RDTSCP()** Returns current cycle count. Can be used for benchmarking.
-*  **SSE2SLOW** (SSE2 is supported, but usually not faster)
-*  **SSE3SLOW** (SSE3 is supported, but usually not faster)
-*  **ATOM** (Atom processor, some SSSE3 instructions are slower)
-*  **Cache line** (Probable size of a cache line).
-*  **L1, L2, L3 Cache size** on newer Intel/AMD CPUs.
-
-## Cpu Vendor/VM
-* **Intel**
-* **AMD**
-* **VIA**
-* **Transmeta**
-* **NSC**
-* **KVM**  (Kernel-based Virtual Machine)
-* **MSVM** (Microsoft Hyper-V or Windows Virtual PC)
-* **VMware**
-* **XenHVM**
-
-# installing
-
-```go get github.com/klauspost/cpuid```
-
-# example
-
-```Go
-package main
-
-import (
-	"fmt"
-	"github.com/klauspost/cpuid"
-)
-
-func main() {
-	// Print basic CPU information:
-	fmt.Println("Name:", cpuid.CPU.BrandName)
-	fmt.Println("PhysicalCores:", cpuid.CPU.PhysicalCores)
-	fmt.Println("ThreadsPerCore:", cpuid.CPU.ThreadsPerCore)
-	fmt.Println("LogicalCores:", cpuid.CPU.LogicalCores)
-	fmt.Println("Family", cpuid.CPU.Family, "Model:", cpuid.CPU.Model)
-	fmt.Println("Features:", cpuid.CPU.Features)
-	fmt.Println("Cacheline bytes:", cpuid.CPU.CacheLine)
-	fmt.Println("L1 Data Cache:", cpuid.CPU.Cache.L1D, "bytes")
-	fmt.Println("L1 Instruction Cache:", cpuid.CPU.Cache.L1D, "bytes")
-	fmt.Println("L2 Cache:", cpuid.CPU.Cache.L2, "bytes")
-	fmt.Println("L3 Cache:", cpuid.CPU.Cache.L3, "bytes")
-
-	// Test if we have a specific feature:
-	if cpuid.CPU.SSE() {
-		fmt.Println("We have Streaming SIMD Extensions")
-	}
-}
-```
-
-Sample output:
-```
->go run main.go
-Name: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz
-PhysicalCores: 2
-ThreadsPerCore: 2
-LogicalCores: 4
-Family 6 Model: 42
-Features: CMOV,MMX,MMXEXT,SSE,SSE2,SSE3,SSSE3,SSE4.1,SSE4.2,AVX,AESNI,CLMUL
-Cacheline bytes: 64
-We have Streaming SIMD Extensions
-```
-
-# private package
-
-In the "private" folder you can find an autogenerated version of the library you can include in your own packages.
-
-For this purpose all exports are removed, and functions and constants are lowercased.
-
-This is not a recommended way of using the library, but provided for convenience, if it is difficult for you to use external packages.
-
-# license
-
-This code is published under an MIT license. See LICENSE file for more information.

vendor/github.com/klauspost/cpuid/cpuid_386.s

@@ -1,42 +0,0 @@
-// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
-
-// +build 386,!gccgo
-
-// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
-TEXT ·asmCpuid(SB), 7, $0
-	XORL CX, CX
-	MOVL op+0(FP), AX
-	CPUID
-	MOVL AX, eax+4(FP)
-	MOVL BX, ebx+8(FP)
-	MOVL CX, ecx+12(FP)
-	MOVL DX, edx+16(FP)
-	RET
-
-// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
-TEXT ·asmCpuidex(SB), 7, $0
-	MOVL op+0(FP), AX
-	MOVL op2+4(FP), CX
-	CPUID
-	MOVL AX, eax+8(FP)
-	MOVL BX, ebx+12(FP)
-	MOVL CX, ecx+16(FP)
-	MOVL DX, edx+20(FP)
-	RET
-
-// func xgetbv(index uint32) (eax, edx uint32)
-TEXT ·asmXgetbv(SB), 7, $0
-	MOVL index+0(FP), CX
-	BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV
-	MOVL AX, eax+4(FP)
-	MOVL DX, edx+8(FP)
-	RET
-
-// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32)
-TEXT ·asmRdtscpAsm(SB), 7, $0
-	BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP
-	MOVL AX, eax+0(FP)
-	MOVL BX, ebx+4(FP)
-	MOVL CX, ecx+8(FP)
-	MOVL DX, edx+12(FP)
-	RET

vendor/github.com/klauspost/cpuid/cpuid_amd64.s

@@ -1,42 +0,0 @@
-// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
-
-//+build amd64,!gccgo
-
-// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
-TEXT ·asmCpuid(SB), 7, $0
-	XORQ CX, CX
-	MOVL op+0(FP), AX
-	CPUID
-	MOVL AX, eax+8(FP)
-	MOVL BX, ebx+12(FP)
-	MOVL CX, ecx+16(FP)
-	MOVL DX, edx+20(FP)
-	RET
-
-// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
-TEXT ·asmCpuidex(SB), 7, $0
-	MOVL op+0(FP), AX
-	MOVL op2+4(FP), CX
-	CPUID
-	MOVL AX, eax+8(FP)
-	MOVL BX, ebx+12(FP)
-	MOVL CX, ecx+16(FP)
-	MOVL DX, edx+20(FP)
-	RET
-
-// func asmXgetbv(index uint32) (eax, edx uint32)
-TEXT ·asmXgetbv(SB), 7, $0
-	MOVL index+0(FP), CX
-	BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV
-	MOVL AX, eax+8(FP)
-	MOVL DX, edx+12(FP)
-	RET
-
-// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32)
-TEXT ·asmRdtscpAsm(SB), 7, $0
-	BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP
-	MOVL AX, eax+0(FP)
-	MOVL BX, ebx+4(FP)
-	MOVL CX, ecx+8(FP)
-	MOVL DX, edx+12(FP)
-	RET

vendor/github.com/klauspost/cpuid/detect_intel.go

@@ -1,17 +0,0 @@
-// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
-
-// +build 386,!gccgo amd64,!gccgo
-
-package cpuid
-
-func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
-func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
-func asmXgetbv(index uint32) (eax, edx uint32)
-func asmRdtscpAsm() (eax, ebx, ecx, edx uint32)
-
-func initCPU() {
-	cpuid = asmCpuid
-	cpuidex = asmCpuidex
-	xgetbv = asmXgetbv
-	rdtscpAsm = asmRdtscpAsm
-}

vendor/github.com/klauspost/cpuid/detect_ref.go

@@ -1,23 +0,0 @@
-// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
-
-// +build !amd64,!386 gccgo
-
-package cpuid
-
-func initCPU() {
-	cpuid = func(op uint32) (eax, ebx, ecx, edx uint32) {
-		return 0, 0, 0, 0
-	}
-
-	cpuidex = func(op, op2 uint32) (eax, ebx, ecx, edx uint32) {
-		return 0, 0, 0, 0
-	}
-
-	xgetbv = func(index uint32) (eax, edx uint32) {
-		return 0, 0
-	}
-
-	rdtscpAsm = func() (eax, ebx, ecx, edx uint32) {
-		return 0, 0, 0, 0
-	}
-}

vendor/github.com/klauspost/cpuid/generate.go

@@ -1,3 +0,0 @@
-package cpuid
-
-//go:generate go run private-gen.go

vendor/github.com/klauspost/cpuid/private-gen.go

@@ -1,476 +0,0 @@
-// +build ignore
-
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"go/ast"
-	"go/parser"
-	"go/printer"
-	"go/token"
-	"io"
-	"io/ioutil"
-	"log"
-	"os"
-	"reflect"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-)
-
-var inFiles = []string{"cpuid.go", "cpuid_test.go"}
-var copyFiles = []string{"cpuid_amd64.s", "cpuid_386.s", "detect_ref.go", "detect_intel.go"}
-var fileSet = token.NewFileSet()
-var reWrites = []rewrite{
-	initRewrite("CPUInfo -> cpuInfo"),
-	initRewrite("Vendor -> vendor"),
-	initRewrite("Flags -> flags"),
-	initRewrite("Detect -> detect"),
-	initRewrite("CPU -> cpu"),
-}
-var excludeNames = map[string]bool{"string": true, "join": true, "trim": true,
-	// cpuid_test.go
-	"t": true, "println": true, "logf": true, "log": true, "fatalf": true, "fatal": true,
-}
-
-var excludePrefixes = []string{"test", "benchmark"}
-
-func main() {
-	Package := "private"
-	parserMode := parser.ParseComments
-	exported := make(map[string]rewrite)
-	for _, file := range inFiles {
-		in, err := os.Open(file)
-		if err != nil {
-			log.Fatalf("opening input", err)
-		}
-
-		src, err := ioutil.ReadAll(in)
-		if err != nil {
-			log.Fatalf("reading input", err)
-		}
-
-		astfile, err := parser.ParseFile(fileSet, file, src, parserMode)
-		if err != nil {
-			log.Fatalf("parsing input", err)
-		}
-
-		for _, rw := range reWrites {
-			astfile = rw(astfile)
-		}
-
-		// Inspect the AST and print all identifiers and literals.
-		var startDecl token.Pos
-		var endDecl token.Pos
-		ast.Inspect(astfile, func(n ast.Node) bool {
-			var s string
-			switch x := n.(type) {
-			case *ast.Ident:
-				if x.IsExported() {
-					t := strings.ToLower(x.Name)
-					for _, pre := range excludePrefixes {
-						if strings.HasPrefix(t, pre) {
-							return true
-						}
-					}
-					if excludeNames[t] != true {
-						//if x.Pos() > startDecl && x.Pos() < endDecl {
-						exported[x.Name] = initRewrite(x.Name + " -> " + t)
-					}
-				}
-
-			case *ast.GenDecl:
-				if x.Tok == token.CONST && x.Lparen > 0 {
-					startDecl = x.Lparen
-					endDecl = x.Rparen
-					// fmt.Printf("Decl:%s -> %s\n", fileSet.Position(startDecl), fileSet.Position(endDecl))
-				}
-			}
-			if s != "" {
-				fmt.Printf("%s:\t%s\n", fileSet.Position(n.Pos()), s)
-			}
-			return true
-		})
-
-		for _, rw := range exported {
-			astfile = rw(astfile)
-		}
-
-		var buf bytes.Buffer
-
-		printer.Fprint(&buf, fileSet, astfile)
-
-		// Remove package documentation and insert information
-		s := buf.String()
-		ind := strings.Index(buf.String(), "\npackage cpuid")
-		s = s[ind:]
-		s = "// Generated, DO NOT EDIT,\n" +
-			"// but copy it to your own project and rename the package.\n" +
-			"// See more at http://github.com/klauspost/cpuid\n" +
-			s
-
-		outputName := Package + string(os.PathSeparator) + file
-
-		err = ioutil.WriteFile(outputName, []byte(s), 0644)
-		if err != nil {
-			log.Fatalf("writing output: %s", err)
-		}
-		log.Println("Generated", outputName)
-	}
-
-	for _, file := range copyFiles {
-		dst := ""
-		if strings.HasPrefix(file, "cpuid") {
-			dst = Package + string(os.PathSeparator) + file
-		} else {
-			dst = Package + string(os.PathSeparator) + "cpuid_" + file
-		}
-		err := copyFile(file, dst)
-		if err != nil {
-			log.Fatalf("copying file: %s", err)
-		}
-		log.Println("Copied", dst)
-	}
-}
-
-// CopyFile copies a file from src to dst. If src and dst files exist, and are
-// the same, then return success. Copy the file contents from src to dst.
-func copyFile(src, dst string) (err error) {
-	sfi, err := os.Stat(src)
-	if err != nil {
-		return
-	}
-	if !sfi.Mode().IsRegular() {
-		// cannot copy non-regular files (e.g., directories,
-		// symlinks, devices, etc.)
-		return fmt.Errorf("CopyFile: non-regular source file %s (%q)", sfi.Name(), sfi.Mode().String())
-	}
-	dfi, err := os.Stat(dst)
-	if err != nil {
-		if !os.IsNotExist(err) {
-			return
-		}
-	} else {
-		if !(dfi.Mode().IsRegular()) {
-			return fmt.Errorf("CopyFile: non-regular destination file %s (%q)", dfi.Name(), dfi.Mode().String())
-		}
-		if os.SameFile(sfi, dfi) {
-			return
-		}
-	}
-	err = copyFileContents(src, dst)
-	return
-}
-
-// copyFileContents copies the contents of the file named src to the file named
-// by dst. The file will be created if it does not already exist. If the
-// destination file exists, all it's contents will be replaced by the contents
-// of the source file.
-func copyFileContents(src, dst string) (err error) {
-	in, err := os.Open(src)
-	if err != nil {
-		return
-	}
-	defer in.Close()
-	out, err := os.Create(dst)
-	if err != nil {
-		return
-	}
-	defer func() {
-		cerr := out.Close()
-		if err == nil {
-			err = cerr
-		}
-	}()
-	if _, err = io.Copy(out, in); err != nil {
-		return
-	}
-	err = out.Sync()
-	return
-}
-
-type rewrite func(*ast.File) *ast.File
-
-// Mostly copied from gofmt
-func initRewrite(rewriteRule string) rewrite {
-	f := strings.Split(rewriteRule, "->")
-	if len(f) != 2 {
-		fmt.Fprintf(os.Stderr, "rewrite rule must be of the form 'pattern -> replacement'\n")
-		os.Exit(2)
-	}
-	pattern := parseExpr(f[0], "pattern")
-	replace := parseExpr(f[1], "replacement")
-	return func(p *ast.File) *ast.File { return rewriteFile(pattern, replace, p) }
-}
-
-// parseExpr parses s as an expression.
-// It might make sense to expand this to allow statement patterns,
-// but there are problems with preserving formatting and also
-// with what a wildcard for a statement looks like.
-func parseExpr(s, what string) ast.Expr {
-	x, err := parser.ParseExpr(s)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "parsing %s %s at %s\n", what, s, err)
-		os.Exit(2)
-	}
-	return x
-}
-
-// Keep this function for debugging.
-/*
-func dump(msg string, val reflect.Value) {
-	fmt.Printf("%s:\n", msg)
-	ast.Print(fileSet, val.Interface())
-	fmt.Println()
-}
-*/
-
-// rewriteFile applies the rewrite rule 'pattern -> replace' to an entire file.
-func rewriteFile(pattern, replace ast.Expr, p *ast.File) *ast.File {
-	cmap := ast.NewCommentMap(fileSet, p, p.Comments)
-	m := make(map[string]reflect.Value)
-	pat := reflect.ValueOf(pattern)
-	repl := reflect.ValueOf(replace)
-
-	var rewriteVal func(val reflect.Value) reflect.Value
-	rewriteVal = func(val reflect.Value) reflect.Value {
-		// don't bother if val is invalid to start with
-		if !val.IsValid() {
-			return reflect.Value{}
-		}
-		for k := range m {
-			delete(m, k)
-		}
-		val = apply(rewriteVal, val)
-		if match(m, pat, val) {
-			val = subst(m, repl, reflect.ValueOf(val.Interface().(ast.Node).Pos()))
-		}
-		return val
-	}
-
-	r := apply(rewriteVal, reflect.ValueOf(p)).Interface().(*ast.File)
-	r.Comments = cmap.Filter(r).Comments() // recreate comments list
-	return r
-}
-
-// set is a wrapper for x.Set(y); it protects the caller from panics if x cannot be changed to y.
-func set(x, y reflect.Value) {
-	// don't bother if x cannot be set or y is invalid
-	if !x.CanSet() || !y.IsValid() {
-		return
-	}
-	defer func() {
-		if x := recover(); x != nil {
-			if s, ok := x.(string); ok &&
-				(strings.Contains(s, "type mismatch") || strings.Contains(s, "not assignable")) {
-				// x cannot be set to y - ignore this rewrite
-				return
-			}
-			panic(x)
-		}
-	}()
-	x.Set(y)
-}
-
-// Values/types for special cases.
-var (
-	objectPtrNil = reflect.ValueOf((*ast.Object)(nil))
-	scopePtrNil  = reflect.ValueOf((*ast.Scope)(nil))
-
-	identType     = reflect.TypeOf((*ast.Ident)(nil))
-	objectPtrType = reflect.TypeOf((*ast.Object)(nil))
-	positionType  = reflect.TypeOf(token.NoPos)
-	callExprType  = reflect.TypeOf((*ast.CallExpr)(nil))
-	scopePtrType  = reflect.TypeOf((*ast.Scope)(nil))
-)
-
-// apply replaces each AST field x in val with f(x), returning val.
-// To avoid extra conversions, f operates on the reflect.Value form.
-func apply(f func(reflect.Value) reflect.Value, val reflect.Value) reflect.Value {
-	if !val.IsValid() {
-		return reflect.Value{}
-	}
-
-	// *ast.Objects introduce cycles and are likely incorrect after
-	// rewrite; don't follow them but replace with nil instead
-	if val.Type() == objectPtrType {
-		return objectPtrNil
-	}
-
-	// similarly for scopes: they are likely incorrect after a rewrite;
-	// replace them with nil
-	if val.Type() == scopePtrType {
-		return scopePtrNil
-	}
-
-	switch v := reflect.Indirect(val); v.Kind() {
-	case reflect.Slice:
-		for i := 0; i < v.Len(); i++ {
-			e := v.Index(i)
-			set(e, f(e))
-		}
-	case reflect.Struct:
-		for i := 0; i < v.NumField(); i++ {
-			e := v.Field(i)
-			set(e, f(e))
-		}
-	case reflect.Interface:
-		e := v.Elem()
-		set(v, f(e))
-	}
-	return val
-}
-
-func isWildcard(s string) bool {
-	rune, size := utf8.DecodeRuneInString(s)
-	return size == len(s) && unicode.IsLower(rune)
-}
-
-// match returns true if pattern matches val,
-// recording wildcard submatches in m.
-// If m == nil, match checks whether pattern == val.
-func match(m map[string]reflect.Value, pattern, val reflect.Value) bool {
-	// Wildcard matches any expression.  If it appears multiple
-	// times in the pattern, it must match the same expression
-	// each time.
-	if m != nil && pattern.IsValid() && pattern.Type() == identType {
-		name := pattern.Interface().(*ast.Ident).Name
-		if isWildcard(name) && val.IsValid() {
-			// wildcards only match valid (non-nil) expressions.
-			if _, ok := val.Interface().(ast.Expr); ok && !val.IsNil() {
-				if old, ok := m[name]; ok {
-					return match(nil, old, val)
-				}
-				m[name] = val
-				return true
-			}
-		}
-	}
-
-	// Otherwise, pattern and val must match recursively.
-	if !pattern.IsValid() || !val.IsValid() {
-		return !pattern.IsValid() && !val.IsValid()
-	}
-	if pattern.Type() != val.Type() {
-		return false
-	}
-
-	// Special cases.
-	switch pattern.Type() {
-	case identType:
-		// For identifiers, only the names need to match
-		// (and none of the other *ast.Object information).
-		// This is a common case, handle it all here instead
-		// of recursing down any further via reflection.
-		p := pattern.Interface().(*ast.Ident)
-		v := val.Interface().(*ast.Ident)
-		return p == nil && v == nil || p != nil && v != nil && p.Name == v.Name
-	case objectPtrType, positionType:
-		// object pointers and token positions always match
-		return true
-	case callExprType:
-		// For calls, the Ellipsis fields (token.Position) must
-		// match since that is how f(x) and f(x...) are different.
-		// Check them here but fall through for the remaining fields.
-		p := pattern.Interface().(*ast.CallExpr)
-		v := val.Interface().(*ast.CallExpr)
-		if p.Ellipsis.IsValid() != v.Ellipsis.IsValid() {
-			return false
-		}
-	}
-
-	p := reflect.Indirect(pattern)
-	v := reflect.Indirect(val)
-	if !p.IsValid() || !v.IsValid() {
-		return !p.IsValid() && !v.IsValid()
-	}
-
-	switch p.Kind() {
-	case reflect.Slice:
-		if p.Len() != v.Len() {
-			return false
-		}
-		for i := 0; i < p.Len(); i++ {
-			if !match(m, p.Index(i), v.Index(i)) {
-				return false
-			}
-		}
-		return true
-
-	case reflect.Struct:
-		for i := 0; i < p.NumField(); i++ {
-			if !match(m, p.Field(i), v.Field(i)) {
-				return false
-			}
-		}
-		return true
-
-	case reflect.Interface:
-		return match(m, p.Elem(), v.Elem())
-	}
-
-	// Handle token integers, etc.
-	return p.Interface() == v.Interface()
-}
-
-// subst returns a copy of pattern with values from m substituted in place
-// of wildcards and pos used as the position of tokens from the pattern.
-// if m == nil, subst returns a copy of pattern and doesn't change the line
-// number information.
-func subst(m map[string]reflect.Value, pattern reflect.Value, pos reflect.Value) reflect.Value {
-	if !pattern.IsValid() {
-		return reflect.Value{}
-	}
-
-	// Wildcard gets replaced with map value.
-	if m != nil && pattern.Type() == identType {
-		name := pattern.Interface().(*ast.Ident).Name
-		if isWildcard(name) {
-			if old, ok := m[name]; ok {
-				return subst(nil, old, reflect.Value{})
-			}
-		}
-	}
-
-	if pos.IsValid() && pattern.Type() == positionType {
-		// use new position only if old position was valid in the first place
-		if old := pattern.Interface().(token.Pos); !old.IsValid() {
-			return pattern
-		}
-		return pos
-	}
-
-	// Otherwise copy.
-	switch p := pattern; p.Kind() {
-	case reflect.Slice:
-		v := reflect.MakeSlice(p.Type(), p.Len(), p.Len())
-		for i := 0; i < p.Len(); i++ {
-			v.Index(i).Set(subst(m, p.Index(i), pos))
-		}
-		return v
-
-	case reflect.Struct:
-		v := reflect.New(p.Type()).Elem()
-		for i := 0; i < p.NumField(); i++ {
-			v.Field(i).Set(subst(m, p.Field(i), pos))
-		}
-		return v
-
-	case reflect.Ptr:
-		v := reflect.New(p.Type()).Elem()
-		if elem := p.Elem(); elem.IsValid() {
-			v.Set(subst(m, elem, pos).Addr())
-		}
-		return v
-
-	case reflect.Interface:
-		v := reflect.New(p.Type()).Elem()
-		if elem := p.Elem(); elem.IsValid() {
-			v.Set(subst(m, elem, pos))
-		}
-		return v
-	}
-
-	return pattern
-}

vendor/github.com/klauspost/crc32/LICENSE

@@ -1,28 +0,0 @@
-Copyright (c) 2012 The Go Authors. All rights reserved.
-Copyright (c) 2015 Klaus Post
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/klauspost/crc32/README.md

@@ -1,87 +0,0 @@
-# crc32
-CRC32 hash with x64 optimizations
-
-This package is a drop-in replacement for the standard library `hash/crc32` package, that features SSE 4.2 optimizations on x64 platforms, for a 10x speedup.
-
-[![Build Status](https://travis-ci.org/klauspost/crc32.svg?branch=master)](https://travis-ci.org/klauspost/crc32)
-
-# usage
-
-Install using `go get github.com/klauspost/crc32`. This library is based on Go 1.5 code and requires Go 1.3 or newer.
-
-Replace `import "hash/crc32"` with `import "github.com/klauspost/crc32"` and you are good to go.
-
-# changes
-* Oct 20, 2016: Changes have been merged to upstream Go. Package updated to match.
-* Dec 4, 2015: Uses the "slice-by-8" trick more extensively, which gives a 1.5 to 2.5x speedup if assembler is unavailable.
-
-
-# performance
-
-For *Go 1.7* performance is equivalent to the standard library. So if you use this package for Go 1.7 you can switch back.
-
-
-For IEEE tables (the most common), there is approximately a factor 10 speedup with "CLMUL" (Carryless multiplication) instruction:
-```
-benchmark            old ns/op     new ns/op     delta
-BenchmarkCrc32KB     99955         10258         -89.74%
-
-benchmark            old MB/s     new MB/s     speedup
-BenchmarkCrc32KB     327.83       3194.20      9.74x
-```
-
-For other tables and "CLMUL"  capable machines the performance is the same as the standard library.
-
-Here are some detailed benchmarks, comparing to go 1.5 standard library with and without assembler enabled.
-
-```
-Std:   Standard Go 1.5 library
-Crc:   Indicates IEEE type CRC.
-40B:   Size of each slice encoded.
-NoAsm: Assembler was disabled (ie. not an AMD64 or SSE 4.2+ capable machine).
-Castagnoli: Castagnoli CRC type.
-
-BenchmarkStdCrc40B-4            10000000               158 ns/op         252.88 MB/s
-BenchmarkCrc40BNoAsm-4          20000000               105 ns/op         377.38 MB/s (slice8)
-BenchmarkCrc40B-4               20000000               105 ns/op         378.77 MB/s (slice8)
-
-BenchmarkStdCrc1KB-4              500000              3604 ns/op         284.10 MB/s
-BenchmarkCrc1KBNoAsm-4           1000000              1463 ns/op         699.79 MB/s (slice8)
-BenchmarkCrc1KB-4                3000000               396 ns/op        2583.69 MB/s (asm)
-
-BenchmarkStdCrc8KB-4              200000             11417 ns/op         717.48 MB/s (slice8)
-BenchmarkCrc8KBNoAsm-4            200000             11317 ns/op         723.85 MB/s (slice8)
-BenchmarkCrc8KB-4                 500000              2919 ns/op        2805.73 MB/s (asm)
-
-BenchmarkStdCrc32KB-4              30000             45749 ns/op         716.24 MB/s (slice8)
-BenchmarkCrc32KBNoAsm-4            30000             45109 ns/op         726.42 MB/s (slice8)
-BenchmarkCrc32KB-4                100000             11497 ns/op        2850.09 MB/s (asm)
-
-BenchmarkStdNoAsmCastagnol40B-4 10000000               161 ns/op         246.94 MB/s
-BenchmarkStdCastagnoli40B-4     50000000              28.4 ns/op        1410.69 MB/s (asm)
-BenchmarkCastagnoli40BNoAsm-4   20000000               100 ns/op         398.01 MB/s (slice8)
-BenchmarkCastagnoli40B-4        50000000              28.2 ns/op        1419.54 MB/s (asm)
-
-BenchmarkStdNoAsmCastagnoli1KB-4  500000              3622 ns/op        282.67 MB/s
-BenchmarkStdCastagnoli1KB-4     10000000               144 ns/op        7099.78 MB/s (asm)
-BenchmarkCastagnoli1KBNoAsm-4    1000000              1475 ns/op         694.14 MB/s (slice8)
-BenchmarkCastagnoli1KB-4        10000000               146 ns/op        6993.35 MB/s (asm)
-
-BenchmarkStdNoAsmCastagnoli8KB-4  50000              28781 ns/op         284.63 MB/s
-BenchmarkStdCastagnoli8KB-4      1000000              1029 ns/op        7957.89 MB/s (asm)
-BenchmarkCastagnoli8KBNoAsm-4     200000             11410 ns/op         717.94 MB/s (slice8)
-BenchmarkCastagnoli8KB-4         1000000              1000 ns/op        8188.71 MB/s (asm)
-
-BenchmarkStdNoAsmCastagnoli32KB-4  10000            115426 ns/op         283.89 MB/s
-BenchmarkStdCastagnoli32KB-4      300000              4065 ns/op        8059.13 MB/s (asm)
-BenchmarkCastagnoli32KBNoAsm-4     30000             45171 ns/op         725.41 MB/s (slice8)
-BenchmarkCastagnoli32KB-4         500000              4077 ns/op        8035.89 MB/s (asm)
-```
-
-The IEEE assembler optimizations has been submitted and will be part of the Go 1.6 standard library.
-
-However, the improved use of slice-by-8 has not, but will probably be submitted for Go 1.7.
-
-# license
-
-Standard Go license. Changes are Copyright (c) 2015 Klaus Post under same conditions.

vendor/github.com/klauspost/crc32/crc32.go

@@ -1,207 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package crc32 implements the 32-bit cyclic redundancy check, or CRC-32,
-// checksum. See http://en.wikipedia.org/wiki/Cyclic_redundancy_check for
-// information.
-//
-// Polynomials are represented in LSB-first form also known as reversed representation.
-//
-// See http://en.wikipedia.org/wiki/Mathematics_of_cyclic_redundancy_checks#Reversed_representations_and_reciprocal_polynomials
-// for information.
-package crc32
-
-import (
-	"hash"
-	"sync"
-)
-
-// The size of a CRC-32 checksum in bytes.
-const Size = 4
-
-// Predefined polynomials.
-const (
-	// IEEE is by far and away the most common CRC-32 polynomial.
-	// Used by ethernet (IEEE 802.3), v.42, fddi, gzip, zip, png, ...
-	IEEE = 0xedb88320
-
-	// Castagnoli's polynomial, used in iSCSI.
-	// Has better error detection characteristics than IEEE.
-	// http://dx.doi.org/10.1109/26.231911
-	Castagnoli = 0x82f63b78
-
-	// Koopman's polynomial.
-	// Also has better error detection characteristics than IEEE.
-	// http://dx.doi.org/10.1109/DSN.2002.1028931
-	Koopman = 0xeb31d82e
-)
-
-// Table is a 256-word table representing the polynomial for efficient processing.
-type Table [256]uint32
-
-// This file makes use of functions implemented in architecture-specific files.
-// The interface that they implement is as follows:
-//
-//    // archAvailableIEEE reports whether an architecture-specific CRC32-IEEE
-//    // algorithm is available.
-//    archAvailableIEEE() bool
-//
-//    // archInitIEEE initializes the architecture-specific CRC3-IEEE algorithm.
-//    // It can only be called if archAvailableIEEE() returns true.
-//    archInitIEEE()
-//
-//    // archUpdateIEEE updates the given CRC32-IEEE. It can only be called if
-//    // archInitIEEE() was previously called.
-//    archUpdateIEEE(crc uint32, p []byte) uint32
-//
-//    // archAvailableCastagnoli reports whether an architecture-specific
-//    // CRC32-C algorithm is available.
-//    archAvailableCastagnoli() bool
-//
-//    // archInitCastagnoli initializes the architecture-specific CRC32-C
-//    // algorithm. It can only be called if archAvailableCastagnoli() returns
-//    // true.
-//    archInitCastagnoli()
-//
-//    // archUpdateCastagnoli updates the given CRC32-C. It can only be called
-//    // if archInitCastagnoli() was previously called.
-//    archUpdateCastagnoli(crc uint32, p []byte) uint32
-
-// castagnoliTable points to a lazily initialized Table for the Castagnoli
-// polynomial. MakeTable will always return this value when asked to make a
-// Castagnoli table so we can compare against it to find when the caller is
-// using this polynomial.
-var castagnoliTable *Table
-var castagnoliTable8 *slicing8Table
-var castagnoliArchImpl bool
-var updateCastagnoli func(crc uint32, p []byte) uint32
-var castagnoliOnce sync.Once
-
-func castagnoliInit() {
-	castagnoliTable = simpleMakeTable(Castagnoli)
-	castagnoliArchImpl = archAvailableCastagnoli()
-
-	if castagnoliArchImpl {
-		archInitCastagnoli()
-		updateCastagnoli = archUpdateCastagnoli
-	} else {
-		// Initialize the slicing-by-8 table.
-		castagnoliTable8 = slicingMakeTable(Castagnoli)
-		updateCastagnoli = func(crc uint32, p []byte) uint32 {
-			return slicingUpdate(crc, castagnoliTable8, p)
-		}
-	}
-}
-
-// IEEETable is the table for the IEEE polynomial.
-var IEEETable = simpleMakeTable(IEEE)
-
-// ieeeTable8 is the slicing8Table for IEEE
-var ieeeTable8 *slicing8Table
-var ieeeArchImpl bool
-var updateIEEE func(crc uint32, p []byte) uint32
-var ieeeOnce sync.Once
-
-func ieeeInit() {
-	ieeeArchImpl = archAvailableIEEE()
-
-	if ieeeArchImpl {
-		archInitIEEE()
-		updateIEEE = archUpdateIEEE
-	} else {
-		// Initialize the slicing-by-8 table.
-		ieeeTable8 = slicingMakeTable(IEEE)
-		updateIEEE = func(crc uint32, p []byte) uint32 {
-			return slicingUpdate(crc, ieeeTable8, p)
-		}
-	}
-}
-
-// MakeTable returns a Table constructed from the specified polynomial.
-// The contents of this Table must not be modified.
-func MakeTable(poly uint32) *Table {
-	switch poly {
-	case IEEE:
-		ieeeOnce.Do(ieeeInit)
-		return IEEETable
-	case Castagnoli:
-		castagnoliOnce.Do(castagnoliInit)
-		return castagnoliTable
-	}
-	return simpleMakeTable(poly)
-}
-
-// digest represents the partial evaluation of a checksum.
-type digest struct {
-	crc uint32
-	tab *Table
-}
-
-// New creates a new hash.Hash32 computing the CRC-32 checksum
-// using the polynomial represented by the Table.
-// Its Sum method will lay the value out in big-endian byte order.
-func New(tab *Table) hash.Hash32 {
-	if tab == IEEETable {
-		ieeeOnce.Do(ieeeInit)
-	}
-	return &digest{0, tab}
-}
-
-// NewIEEE creates a new hash.Hash32 computing the CRC-32 checksum
-// using the IEEE polynomial.
-// Its Sum method will lay the value out in big-endian byte order.
-func NewIEEE() hash.Hash32 { return New(IEEETable) }
-
-func (d *digest) Size() int { return Size }
-
-func (d *digest) BlockSize() int { return 1 }
-
-func (d *digest) Reset() { d.crc = 0 }
-
-// Update returns the result of adding the bytes in p to the crc.
-func Update(crc uint32, tab *Table, p []byte) uint32 {
-	switch tab {
-	case castagnoliTable:
-		return updateCastagnoli(crc, p)
-	case IEEETable:
-		// Unfortunately, because IEEETable is exported, IEEE may be used without a
-		// call to MakeTable. We have to make sure it gets initialized in that case.
-		ieeeOnce.Do(ieeeInit)
-		return updateIEEE(crc, p)
-	default:
-		return simpleUpdate(crc, tab, p)
-	}
-}
-
-func (d *digest) Write(p []byte) (n int, err error) {
-	switch d.tab {
-	case castagnoliTable:
-		d.crc = updateCastagnoli(d.crc, p)
-	case IEEETable:
-		// We only create digest objects through New() which takes care of
-		// initialization in this case.
-		d.crc = updateIEEE(d.crc, p)
-	default:
-		d.crc = simpleUpdate(d.crc, d.tab, p)
-	}
-	return len(p), nil
-}
-
-func (d *digest) Sum32() uint32 { return d.crc }
-
-func (d *digest) Sum(in []byte) []byte {
-	s := d.Sum32()
-	return append(in, byte(s>>24), byte(s>>16), byte(s>>8), byte(s))
-}
-
-// Checksum returns the CRC-32 checksum of data
-// using the polynomial represented by the Table.
-func Checksum(data []byte, tab *Table) uint32 { return Update(0, tab, data) }
-
-// ChecksumIEEE returns the CRC-32 checksum of data
-// using the IEEE polynomial.
-func ChecksumIEEE(data []byte) uint32 {
-	ieeeOnce.Do(ieeeInit)
-	return updateIEEE(0, data)
-}

vendor/github.com/klauspost/crc32/crc32_amd64.go

@@ -1,230 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !appengine,!gccgo
-
-// AMD64-specific hardware-assisted CRC32 algorithms. See crc32.go for a
-// description of the interface that each architecture-specific file
-// implements.
-
-package crc32
-
-import "unsafe"
-
-// This file contains the code to call the SSE 4.2 version of the Castagnoli
-// and IEEE CRC.
-
-// haveSSE41/haveSSE42/haveCLMUL are defined in crc_amd64.s and use
-// CPUID to test for SSE 4.1, 4.2 and CLMUL support.
-func haveSSE41() bool
-func haveSSE42() bool
-func haveCLMUL() bool
-
-// castagnoliSSE42 is defined in crc32_amd64.s and uses the SSE4.2 CRC32
-// instruction.
-//go:noescape
-func castagnoliSSE42(crc uint32, p []byte) uint32
-
-// castagnoliSSE42Triple is defined in crc32_amd64.s and uses the SSE4.2 CRC32
-// instruction.
-//go:noescape
-func castagnoliSSE42Triple(
-	crcA, crcB, crcC uint32,
-	a, b, c []byte,
-	rounds uint32,
-) (retA uint32, retB uint32, retC uint32)
-
-// ieeeCLMUL is defined in crc_amd64.s and uses the PCLMULQDQ
-// instruction as well as SSE 4.1.
-//go:noescape
-func ieeeCLMUL(crc uint32, p []byte) uint32
-
-var sse42 = haveSSE42()
-var useFastIEEE = haveCLMUL() && haveSSE41()
-
-const castagnoliK1 = 168
-const castagnoliK2 = 1344
-
-type sse42Table [4]Table
-
-var castagnoliSSE42TableK1 *sse42Table
-var castagnoliSSE42TableK2 *sse42Table
-
-func archAvailableCastagnoli() bool {
-	return sse42
-}
-
-func archInitCastagnoli() {
-	if !sse42 {
-		panic("arch-specific Castagnoli not available")
-	}
-	castagnoliSSE42TableK1 = new(sse42Table)
-	castagnoliSSE42TableK2 = new(sse42Table)
-	// See description in updateCastagnoli.
-	//    t[0][i] = CRC(i000, O)
-	//    t[1][i] = CRC(0i00, O)
-	//    t[2][i] = CRC(00i0, O)
-	//    t[3][i] = CRC(000i, O)
-	// where O is a sequence of K zeros.
-	var tmp [castagnoliK2]byte
-	for b := 0; b < 4; b++ {
-		for i := 0; i < 256; i++ {
-			val := uint32(i) << uint32(b*8)
-			castagnoliSSE42TableK1[b][i] = castagnoliSSE42(val, tmp[:castagnoliK1])
-			castagnoliSSE42TableK2[b][i] = castagnoliSSE42(val, tmp[:])
-		}
-	}
-}
-
-// castagnoliShift computes the CRC32-C of K1 or K2 zeroes (depending on the
-// table given) with the given initial crc value. This corresponds to
-// CRC(crc, O) in the description in updateCastagnoli.
-func castagnoliShift(table *sse42Table, crc uint32) uint32 {
-	return table[3][crc>>24] ^
-		table[2][(crc>>16)&0xFF] ^
-		table[1][(crc>>8)&0xFF] ^
-		table[0][crc&0xFF]
-}
-
-func archUpdateCastagnoli(crc uint32, p []byte) uint32 {
-	if !sse42 {
-		panic("not available")
-	}
-
-	// This method is inspired from the algorithm in Intel's white paper:
-	//    "Fast CRC Computation for iSCSI Polynomial Using CRC32 Instruction"
-	// The same strategy of splitting the buffer in three is used but the
-	// combining calculation is different; the complete derivation is explained
-	// below.
-	//
-	// -- The basic idea --
-	//
-	// The CRC32 instruction (available in SSE4.2) can process 8 bytes at a
-	// time. In recent Intel architectures the instruction takes 3 cycles;
-	// however the processor can pipeline up to three instructions if they
-	// don't depend on each other.
-	//
-	// Roughly this means that we can process three buffers in about the same
-	// time we can process one buffer.
-	//
-	// The idea is then to split the buffer in three, CRC the three pieces
-	// separately and then combine the results.
-	//
-	// Combining the results requires precomputed tables, so we must choose a
-	// fixed buffer length to optimize. The longer the length, the faster; but
-	// only buffers longer than this length will use the optimization. We choose
-	// two cutoffs and compute tables for both:
-	//  - one around 512: 168*3=504
-	//  - one around 4KB: 1344*3=4032
-	//
-	// -- The nitty gritty --
-	//
-	// Let CRC(I, X) be the non-inverted CRC32-C of the sequence X (with
-	// initial non-inverted CRC I). This function has the following properties:
-	//   (a) CRC(I, AB) = CRC(CRC(I, A), B)
-	//   (b) CRC(I, A xor B) = CRC(I, A) xor CRC(0, B)
-	//
-	// Say we want to compute CRC(I, ABC) where A, B, C are three sequences of
-	// K bytes each, where K is a fixed constant. Let O be the sequence of K zero
-	// bytes.
-	//
-	// CRC(I, ABC) = CRC(I, ABO xor C)
-	//             = CRC(I, ABO) xor CRC(0, C)
-	//             = CRC(CRC(I, AB), O) xor CRC(0, C)
-	//             = CRC(CRC(I, AO xor B), O) xor CRC(0, C)
-	//             = CRC(CRC(I, AO) xor CRC(0, B), O) xor CRC(0, C)
-	//             = CRC(CRC(CRC(I, A), O) xor CRC(0, B), O) xor CRC(0, C)
-	//
-	// The castagnoliSSE42Triple function can compute CRC(I, A), CRC(0, B),
-	// and CRC(0, C) efficiently.  We just need to find a way to quickly compute
-	// CRC(uvwx, O) given a 4-byte initial value uvwx. We can precompute these
-	// values; since we can't have a 32-bit table, we break it up into four
-	// 8-bit tables:
-	//
-	//    CRC(uvwx, O) = CRC(u000, O) xor
-	//                   CRC(0v00, O) xor
-	//                   CRC(00w0, O) xor
-	//                   CRC(000x, O)
-	//
-	// We can compute tables corresponding to the four terms for all 8-bit
-	// values.
-
-	crc = ^crc
-
-	// If a buffer is long enough to use the optimization, process the first few
-	// bytes to align the buffer to an 8 byte boundary (if necessary).
-	if len(p) >= castagnoliK1*3 {
-		delta := int(uintptr(unsafe.Pointer(&p[0])) & 7)
-		if delta != 0 {
-			delta = 8 - delta
-			crc = castagnoliSSE42(crc, p[:delta])
-			p = p[delta:]
-		}
-	}
-
-	// Process 3*K2 at a time.
-	for len(p) >= castagnoliK2*3 {
-		// Compute CRC(I, A), CRC(0, B), and CRC(0, C).
-		crcA, crcB, crcC := castagnoliSSE42Triple(
-			crc, 0, 0,
-			p, p[castagnoliK2:], p[castagnoliK2*2:],
-			castagnoliK2/24)
-
-		// CRC(I, AB) = CRC(CRC(I, A), O) xor CRC(0, B)
-		crcAB := castagnoliShift(castagnoliSSE42TableK2, crcA) ^ crcB
-		// CRC(I, ABC) = CRC(CRC(I, AB), O) xor CRC(0, C)
-		crc = castagnoliShift(castagnoliSSE42TableK2, crcAB) ^ crcC
-		p = p[castagnoliK2*3:]
-	}
-
-	// Process 3*K1 at a time.
-	for len(p) >= castagnoliK1*3 {
-		// Compute CRC(I, A), CRC(0, B), and CRC(0, C).
-		crcA, crcB, crcC := castagnoliSSE42Triple(
-			crc, 0, 0,
-			p, p[castagnoliK1:], p[castagnoliK1*2:],
-			castagnoliK1/24)
-
-		// CRC(I, AB) = CRC(CRC(I, A), O) xor CRC(0, B)
-		crcAB := castagnoliShift(castagnoliSSE42TableK1, crcA) ^ crcB
-		// CRC(I, ABC) = CRC(CRC(I, AB), O) xor CRC(0, C)
-		crc = castagnoliShift(castagnoliSSE42TableK1, crcAB) ^ crcC
-		p = p[castagnoliK1*3:]
-	}
-
-	// Use the simple implementation for what's left.
-	crc = castagnoliSSE42(crc, p)
-	return ^crc
-}
-
-func archAvailableIEEE() bool {
-	return useFastIEEE
-}
-
-var archIeeeTable8 *slicing8Table
-
-func archInitIEEE() {
-	if !useFastIEEE {
-		panic("not available")
-	}
-	// We still use slicing-by-8 for small buffers.
-	archIeeeTable8 = slicingMakeTable(IEEE)
-}
-
-func archUpdateIEEE(crc uint32, p []byte) uint32 {
-	if !useFastIEEE {
-		panic("not available")
-	}
-
-	if len(p) >= 64 {
-		left := len(p) & 15
-		do := len(p) - left
-		crc = ^ieeeCLMUL(^crc, p[:do])
-		p = p[do:]
-	}
-	if len(p) == 0 {
-		return crc
-	}
-	return slicingUpdate(crc, archIeeeTable8, p)
-}

vendor/github.com/klauspost/crc32/crc32_amd64.s

@@ -1,319 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build gc
-
-#define NOSPLIT 4
-#define RODATA 8
-
-// castagnoliSSE42 updates the (non-inverted) crc with the given buffer.
-//
-// func castagnoliSSE42(crc uint32, p []byte) uint32
-TEXT ·castagnoliSSE42(SB), NOSPLIT, $0
-	MOVL crc+0(FP), AX    // CRC value
-	MOVQ p+8(FP), SI      // data pointer
-	MOVQ p_len+16(FP), CX // len(p)
-
-	// If there are fewer than 8 bytes to process, skip alignment.
-	CMPQ CX, $8
-	JL   less_than_8
-
-	MOVQ SI, BX
-	ANDQ $7, BX
-	JZ   aligned
-
-	// Process the first few bytes to 8-byte align the input.
-
-	// BX = 8 - BX. We need to process this many bytes to align.
-	SUBQ $1, BX
-	XORQ $7, BX
-
-	BTQ $0, BX
-	JNC align_2
-
-	CRC32B (SI), AX
-	DECQ   CX
-	INCQ   SI
-
-align_2:
-	BTQ $1, BX
-	JNC align_4
-
-	// CRC32W (SI), AX
-	BYTE $0x66; BYTE $0xf2; BYTE $0x0f; BYTE $0x38; BYTE $0xf1; BYTE $0x06
-
-	SUBQ $2, CX
-	ADDQ $2, SI
-
-align_4:
-	BTQ $2, BX
-	JNC aligned
-
-	// CRC32L (SI), AX
-	BYTE $0xf2; BYTE $0x0f; BYTE $0x38; BYTE $0xf1; BYTE $0x06
-
-	SUBQ $4, CX
-	ADDQ $4, SI
-
-aligned:
-	// The input is now 8-byte aligned and we can process 8-byte chunks.
-	CMPQ CX, $8
-	JL   less_than_8
-
-	CRC32Q (SI), AX
-	ADDQ   $8, SI
-	SUBQ   $8, CX
-	JMP    aligned
-
-less_than_8:
-	// We may have some bytes left over; process 4 bytes, then 2, then 1.
-	BTQ $2, CX
-	JNC less_than_4
-
-	// CRC32L (SI), AX
-	BYTE $0xf2; BYTE $0x0f; BYTE $0x38; BYTE $0xf1; BYTE $0x06
-	ADDQ $4, SI
-
-less_than_4:
-	BTQ $1, CX
-	JNC less_than_2
-
-	// CRC32W (SI), AX
-	BYTE $0x66; BYTE $0xf2; BYTE $0x0f; BYTE $0x38; BYTE $0xf1; BYTE $0x06
-	ADDQ $2, SI
-
-less_than_2:
-	BTQ $0, CX
-	JNC done
-
-	CRC32B (SI), AX
-
-done:
-	MOVL AX, ret+32(FP)
-	RET
-
-// castagnoliSSE42Triple updates three (non-inverted) crcs with (24*rounds)
-// bytes from each buffer.
-//
-// func castagnoliSSE42Triple(
-//     crc1, crc2, crc3 uint32,
-//     a, b, c []byte,
-//     rounds uint32,
-// ) (retA uint32, retB uint32, retC uint32)
-TEXT ·castagnoliSSE42Triple(SB), NOSPLIT, $0
-	MOVL crcA+0(FP), AX
-	MOVL crcB+4(FP), CX
-	MOVL crcC+8(FP), DX
-
-	MOVQ a+16(FP), R8  // data pointer
-	MOVQ b+40(FP), R9  // data pointer
-	MOVQ c+64(FP), R10 // data pointer
-
-	MOVL rounds+88(FP), R11
-
-loop:
-	CRC32Q (R8), AX
-	CRC32Q (R9), CX
-	CRC32Q (R10), DX
-
-	CRC32Q 8(R8), AX
-	CRC32Q 8(R9), CX
-	CRC32Q 8(R10), DX
-
-	CRC32Q 16(R8), AX
-	CRC32Q 16(R9), CX
-	CRC32Q 16(R10), DX
-
-	ADDQ $24, R8
-	ADDQ $24, R9
-	ADDQ $24, R10
-
-	DECQ R11
-	JNZ  loop
-
-	MOVL AX, retA+96(FP)
-	MOVL CX, retB+100(FP)
-	MOVL DX, retC+104(FP)
-	RET
-
-// func haveSSE42() bool
-TEXT ·haveSSE42(SB), NOSPLIT, $0
-	XORQ AX, AX
-	INCL AX
-	CPUID
-	SHRQ $20, CX
-	ANDQ $1, CX
-	MOVB CX, ret+0(FP)
-	RET
-
-// func haveCLMUL() bool
-TEXT ·haveCLMUL(SB), NOSPLIT, $0
-	XORQ AX, AX
-	INCL AX
-	CPUID
-	SHRQ $1, CX
-	ANDQ $1, CX
-	MOVB CX, ret+0(FP)
-	RET
-
-// func haveSSE41() bool
-TEXT ·haveSSE41(SB), NOSPLIT, $0
-	XORQ AX, AX
-	INCL AX
-	CPUID
-	SHRQ $19, CX
-	ANDQ $1, CX
-	MOVB CX, ret+0(FP)
-	RET
-
-// CRC32 polynomial data
-//
-// These constants are lifted from the
-// Linux kernel, since they avoid the costly
-// PSHUFB 16 byte reversal proposed in the
-// original Intel paper.
-DATA r2r1kp<>+0(SB)/8, $0x154442bd4
-DATA r2r1kp<>+8(SB)/8, $0x1c6e41596
-DATA r4r3kp<>+0(SB)/8, $0x1751997d0
-DATA r4r3kp<>+8(SB)/8, $0x0ccaa009e
-DATA rupolykp<>+0(SB)/8, $0x1db710641
-DATA rupolykp<>+8(SB)/8, $0x1f7011641
-DATA r5kp<>+0(SB)/8, $0x163cd6124
-
-GLOBL r2r1kp<>(SB), RODATA, $16
-GLOBL r4r3kp<>(SB), RODATA, $16
-GLOBL rupolykp<>(SB), RODATA, $16
-GLOBL r5kp<>(SB), RODATA, $8
-
-// Based on http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
-// len(p) must be at least 64, and must be a multiple of 16.
-
-// func ieeeCLMUL(crc uint32, p []byte) uint32
-TEXT ·ieeeCLMUL(SB), NOSPLIT, $0
-	MOVL crc+0(FP), X0    // Initial CRC value
-	MOVQ p+8(FP), SI      // data pointer
-	MOVQ p_len+16(FP), CX // len(p)
-
-	MOVOU (SI), X1
-	MOVOU 16(SI), X2
-	MOVOU 32(SI), X3
-	MOVOU 48(SI), X4
-	PXOR  X0, X1
-	ADDQ  $64, SI    // buf+=64
-	SUBQ  $64, CX    // len-=64
-	CMPQ  CX, $64    // Less than 64 bytes left
-	JB    remain64
-
-	MOVOA r2r1kp<>+0(SB), X0
-
-loopback64:
-	MOVOA X1, X5
-	MOVOA X2, X6
-	MOVOA X3, X7
-	MOVOA X4, X8
-
-	PCLMULQDQ $0, X0, X1
-	PCLMULQDQ $0, X0, X2
-	PCLMULQDQ $0, X0, X3
-	PCLMULQDQ $0, X0, X4
-
-	// Load next early
-	MOVOU (SI), X11
-	MOVOU 16(SI), X12
-	MOVOU 32(SI), X13
-	MOVOU 48(SI), X14
-
-	PCLMULQDQ $0x11, X0, X5
-	PCLMULQDQ $0x11, X0, X6
-	PCLMULQDQ $0x11, X0, X7
-	PCLMULQDQ $0x11, X0, X8
-
-	PXOR X5, X1
-	PXOR X6, X2
-	PXOR X7, X3
-	PXOR X8, X4
-
-	PXOR X11, X1
-	PXOR X12, X2
-	PXOR X13, X3
-	PXOR X14, X4
-
-	ADDQ $0x40, DI
-	ADDQ $64, SI    // buf+=64
-	SUBQ $64, CX    // len-=64
-	CMPQ CX, $64    // Less than 64 bytes left?
-	JGE  loopback64
-
-	// Fold result into a single register (X1)
-remain64:
-	MOVOA r4r3kp<>+0(SB), X0
-
-	MOVOA     X1, X5
-	PCLMULQDQ $0, X0, X1
-	PCLMULQDQ $0x11, X0, X5
-	PXOR      X5, X1
-	PXOR      X2, X1
-
-	MOVOA     X1, X5
-	PCLMULQDQ $0, X0, X1
-	PCLMULQDQ $0x11, X0, X5
-	PXOR      X5, X1
-	PXOR      X3, X1
-
-	MOVOA     X1, X5
-	PCLMULQDQ $0, X0, X1
-	PCLMULQDQ $0x11, X0, X5
-	PXOR      X5, X1
-	PXOR      X4, X1
-
-	// If there is less than 16 bytes left we are done
-	CMPQ CX, $16
-	JB   finish
-
-	// Encode 16 bytes
-remain16:
-	MOVOU     (SI), X10
-	MOVOA     X1, X5
-	PCLMULQDQ $0, X0, X1
-	PCLMULQDQ $0x11, X0, X5
-	PXOR      X5, X1
-	PXOR      X10, X1
-	SUBQ      $16, CX
-	ADDQ      $16, SI
-	CMPQ      CX, $16
-	JGE       remain16
-
-finish:
-	// Fold final result into 32 bits and return it
-	PCMPEQB   X3, X3
-	PCLMULQDQ $1, X1, X0
-	PSRLDQ    $8, X1
-	PXOR      X0, X1
-
-	MOVOA X1, X2
-	MOVQ  r5kp<>+0(SB), X0
-
-	// Creates 32 bit mask. Note that we don't care about upper half.
-	PSRLQ $32, X3
-
-	PSRLDQ    $4, X2
-	PAND      X3, X1
-	PCLMULQDQ $0, X0, X1
-	PXOR      X2, X1
-
-	MOVOA rupolykp<>+0(SB), X0
-
-	MOVOA     X1, X2
-	PAND      X3, X1
-	PCLMULQDQ $0x10, X0, X1
-	PAND      X3, X1
-	PCLMULQDQ $0, X0, X1
-	PXOR      X2, X1
-
-	// PEXTRD   $1, X1, AX  (SSE 4.1)
-	BYTE $0x66; BYTE $0x0f; BYTE $0x3a
-	BYTE $0x16; BYTE $0xc8; BYTE $0x01
-	MOVL AX, ret+32(FP)
-
-	RET

vendor/github.com/klauspost/crc32/crc32_amd64p32.go

@@ -1,43 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !appengine,!gccgo
-
-package crc32
-
-// This file contains the code to call the SSE 4.2 version of the Castagnoli
-// CRC.
-
-// haveSSE42 is defined in crc32_amd64p32.s and uses CPUID to test for SSE 4.2
-// support.
-func haveSSE42() bool
-
-// castagnoliSSE42 is defined in crc32_amd64p32.s and uses the SSE4.2 CRC32
-// instruction.
-//go:noescape
-func castagnoliSSE42(crc uint32, p []byte) uint32
-
-var sse42 = haveSSE42()
-
-func archAvailableCastagnoli() bool {
-	return sse42
-}
-
-func archInitCastagnoli() {
-	if !sse42 {
-		panic("not available")
-	}
-	// No initialization necessary.
-}
-
-func archUpdateCastagnoli(crc uint32, p []byte) uint32 {
-	if !sse42 {
-		panic("not available")
-	}
-	return castagnoliSSE42(crc, p)
-}
-
-func archAvailableIEEE() bool                    { return false }
-func archInitIEEE()                              { panic("not available") }
-func archUpdateIEEE(crc uint32, p []byte) uint32 { panic("not available") }

vendor/github.com/klauspost/crc32/crc32_amd64p32.s

@@ -1,67 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build gc
-
-#define NOSPLIT 4
-#define RODATA 8
-
-// func castagnoliSSE42(crc uint32, p []byte) uint32
-TEXT ·castagnoliSSE42(SB), NOSPLIT, $0
-	MOVL crc+0(FP), AX   // CRC value
-	MOVL p+4(FP), SI     // data pointer
-	MOVL p_len+8(FP), CX // len(p)
-
-	NOTL AX
-
-	// If there's less than 8 bytes to process, we do it byte-by-byte.
-	CMPQ CX, $8
-	JL   cleanup
-
-	// Process individual bytes until the input is 8-byte aligned.
-startup:
-	MOVQ SI, BX
-	ANDQ $7, BX
-	JZ   aligned
-
-	CRC32B (SI), AX
-	DECQ   CX
-	INCQ   SI
-	JMP    startup
-
-aligned:
-	// The input is now 8-byte aligned and we can process 8-byte chunks.
-	CMPQ CX, $8
-	JL   cleanup
-
-	CRC32Q (SI), AX
-	ADDQ   $8, SI
-	SUBQ   $8, CX
-	JMP    aligned
-
-cleanup:
-	// We may have some bytes left over that we process one at a time.
-	CMPQ CX, $0
-	JE   done
-
-	CRC32B (SI), AX
-	INCQ   SI
-	DECQ   CX
-	JMP    cleanup
-
-done:
-	NOTL AX
-	MOVL AX, ret+16(FP)
-	RET
-
-// func haveSSE42() bool
-TEXT ·haveSSE42(SB), NOSPLIT, $0
-	XORQ AX, AX
-	INCL AX
-	CPUID
-	SHRQ $20, CX
-	ANDQ $1, CX
-	MOVB CX, ret+0(FP)
-	RET
-

vendor/github.com/klauspost/crc32/crc32_generic.go

@@ -1,89 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// This file contains CRC32 algorithms that are not specific to any architecture
-// and don't use hardware acceleration.
-//
-// The simple (and slow) CRC32 implementation only uses a 256*4 bytes table.
-//
-// The slicing-by-8 algorithm is a faster implementation that uses a bigger
-// table (8*256*4 bytes).
-
-package crc32
-
-// simpleMakeTable allocates and constructs a Table for the specified
-// polynomial. The table is suitable for use with the simple algorithm
-// (simpleUpdate).
-func simpleMakeTable(poly uint32) *Table {
-	t := new(Table)
-	simplePopulateTable(poly, t)
-	return t
-}
-
-// simplePopulateTable constructs a Table for the specified polynomial, suitable
-// for use with simpleUpdate.
-func simplePopulateTable(poly uint32, t *Table) {
-	for i := 0; i < 256; i++ {
-		crc := uint32(i)
-		for j := 0; j < 8; j++ {
-			if crc&1 == 1 {
-				crc = (crc >> 1) ^ poly
-			} else {
-				crc >>= 1
-			}
-		}
-		t[i] = crc
-	}
-}
-
-// simpleUpdate uses the simple algorithm to update the CRC, given a table that
-// was previously computed using simpleMakeTable.
-func simpleUpdate(crc uint32, tab *Table, p []byte) uint32 {
-	crc = ^crc
-	for _, v := range p {
-		crc = tab[byte(crc)^v] ^ (crc >> 8)
-	}
-	return ^crc
-}
-
-// Use slicing-by-8 when payload >= this value.
-const slicing8Cutoff = 16
-
-// slicing8Table is array of 8 Tables, used by the slicing-by-8 algorithm.
-type slicing8Table [8]Table
-
-// slicingMakeTable constructs a slicing8Table for the specified polynomial. The
-// table is suitable for use with the slicing-by-8 algorithm (slicingUpdate).
-func slicingMakeTable(poly uint32) *slicing8Table {
-	t := new(slicing8Table)
-	simplePopulateTable(poly, &t[0])
-	for i := 0; i < 256; i++ {
-		crc := t[0][i]
-		for j := 1; j < 8; j++ {
-			crc = t[0][crc&0xFF] ^ (crc >> 8)
-			t[j][i] = crc
-		}
-	}
-	return t
-}
-
-// slicingUpdate uses the slicing-by-8 algorithm to update the CRC, given a
-// table that was previously computed using slicingMakeTable.
-func slicingUpdate(crc uint32, tab *slicing8Table, p []byte) uint32 {
-	if len(p) >= slicing8Cutoff {
-		crc = ^crc
-		for len(p) > 8 {
-			crc ^= uint32(p[0]) | uint32(p[1])<<8 | uint32(p[2])<<16 | uint32(p[3])<<24
-			crc = tab[0][p[7]] ^ tab[1][p[6]] ^ tab[2][p[5]] ^ tab[3][p[4]] ^
-				tab[4][crc>>24] ^ tab[5][(crc>>16)&0xFF] ^
-				tab[6][(crc>>8)&0xFF] ^ tab[7][crc&0xFF]
-			p = p[8:]
-		}
-		crc = ^crc
-	}
-	if len(p) == 0 {
-		return crc
-	}
-	return simpleUpdate(crc, &tab[0], p)
-}

vendor/github.com/klauspost/crc32/crc32_otherarch.go

@@ -1,15 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !amd64,!amd64p32,!s390x
-
-package crc32
-
-func archAvailableIEEE() bool                    { return false }
-func archInitIEEE()                              { panic("not available") }
-func archUpdateIEEE(crc uint32, p []byte) uint32 { panic("not available") }
-
-func archAvailableCastagnoli() bool                    { return false }
-func archInitCastagnoli()                              { panic("not available") }
-func archUpdateCastagnoli(crc uint32, p []byte) uint32 { panic("not available") }

vendor/github.com/klauspost/crc32/crc32_s390x.go

@@ -1,91 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build s390x
-
-package crc32
-
-const (
-	vxMinLen    = 64
-	vxAlignMask = 15 // align to 16 bytes
-)
-
-// hasVectorFacility reports whether the machine has the z/Architecture
-// vector facility installed and enabled.
-func hasVectorFacility() bool
-
-var hasVX = hasVectorFacility()
-
-// vectorizedCastagnoli implements CRC32 using vector instructions.
-// It is defined in crc32_s390x.s.
-//go:noescape
-func vectorizedCastagnoli(crc uint32, p []byte) uint32
-
-// vectorizedIEEE implements CRC32 using vector instructions.
-// It is defined in crc32_s390x.s.
-//go:noescape
-func vectorizedIEEE(crc uint32, p []byte) uint32
-
-func archAvailableCastagnoli() bool {
-	return hasVX
-}
-
-var archCastagnoliTable8 *slicing8Table
-
-func archInitCastagnoli() {
-	if !hasVX {
-		panic("not available")
-	}
-	// We still use slicing-by-8 for small buffers.
-	archCastagnoliTable8 = slicingMakeTable(Castagnoli)
-}
-
-// archUpdateCastagnoli calculates the checksum of p using
-// vectorizedCastagnoli.
-func archUpdateCastagnoli(crc uint32, p []byte) uint32 {
-	if !hasVX {
-		panic("not available")
-	}
-	// Use vectorized function if data length is above threshold.
-	if len(p) >= vxMinLen {
-		aligned := len(p) & ^vxAlignMask
-		crc = vectorizedCastagnoli(crc, p[:aligned])
-		p = p[aligned:]
-	}
-	if len(p) == 0 {
-		return crc
-	}
-	return slicingUpdate(crc, archCastagnoliTable8, p)
-}
-
-func archAvailableIEEE() bool {
-	return hasVX
-}
-
-var archIeeeTable8 *slicing8Table
-
-func archInitIEEE() {
-	if !hasVX {
-		panic("not available")
-	}
-	// We still use slicing-by-8 for small buffers.
-	archIeeeTable8 = slicingMakeTable(IEEE)
-}
-
-// archUpdateIEEE calculates the checksum of p using vectorizedIEEE.
-func archUpdateIEEE(crc uint32, p []byte) uint32 {
-	if !hasVX {
-		panic("not available")
-	}
-	// Use vectorized function if data length is above threshold.
-	if len(p) >= vxMinLen {
-		aligned := len(p) & ^vxAlignMask
-		crc = vectorizedIEEE(crc, p[:aligned])
-		p = p[aligned:]
-	}
-	if len(p) == 0 {
-		return crc
-	}
-	return slicingUpdate(crc, archIeeeTable8, p)
-}

vendor/github.com/klauspost/crc32/crc32_s390x.s

@@ -1,249 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build s390x
-
-#include "textflag.h"
-
-// Vector register range containing CRC-32 constants
-
-#define CONST_PERM_LE2BE        V9
-#define CONST_R2R1              V10
-#define CONST_R4R3              V11
-#define CONST_R5                V12
-#define CONST_RU_POLY           V13
-#define CONST_CRC_POLY          V14
-
-// The CRC-32 constant block contains reduction constants to fold and
-// process particular chunks of the input data stream in parallel.
-//
-// Note that the constant definitions below are extended in order to compute
-// intermediate results with a single VECTOR GALOIS FIELD MULTIPLY instruction.
-// The rightmost doubleword can be 0 to prevent contribution to the result or
-// can be multiplied by 1 to perform an XOR without the need for a separate
-// VECTOR EXCLUSIVE OR instruction.
-//
-// The polynomials used are bit-reflected:
-//
-//            IEEE: P'(x) = 0x0edb88320
-//      Castagnoli: P'(x) = 0x082f63b78
-
-// IEEE polynomial constants
-DATA ·crcleconskp+0(SB)/8, $0x0F0E0D0C0B0A0908 // LE-to-BE mask
-DATA ·crcleconskp+8(SB)/8, $0x0706050403020100
-DATA ·crcleconskp+16(SB)/8, $0x00000001c6e41596 // R2
-DATA ·crcleconskp+24(SB)/8, $0x0000000154442bd4 // R1
-DATA ·crcleconskp+32(SB)/8, $0x00000000ccaa009e // R4
-DATA ·crcleconskp+40(SB)/8, $0x00000001751997d0 // R3
-DATA ·crcleconskp+48(SB)/8, $0x0000000000000000
-DATA ·crcleconskp+56(SB)/8, $0x0000000163cd6124 // R5
-DATA ·crcleconskp+64(SB)/8, $0x0000000000000000
-DATA ·crcleconskp+72(SB)/8, $0x00000001F7011641 // u'
-DATA ·crcleconskp+80(SB)/8, $0x0000000000000000
-DATA ·crcleconskp+88(SB)/8, $0x00000001DB710641 // P'(x) << 1
-
-GLOBL ·crcleconskp(SB), RODATA, $144
-
-// Castagonli Polynomial constants
-DATA ·crccleconskp+0(SB)/8, $0x0F0E0D0C0B0A0908 // LE-to-BE mask
-DATA ·crccleconskp+8(SB)/8, $0x0706050403020100
-DATA ·crccleconskp+16(SB)/8, $0x000000009e4addf8 // R2
-DATA ·crccleconskp+24(SB)/8, $0x00000000740eef02 // R1
-DATA ·crccleconskp+32(SB)/8, $0x000000014cd00bd6 // R4
-DATA ·crccleconskp+40(SB)/8, $0x00000000f20c0dfe // R3
-DATA ·crccleconskp+48(SB)/8, $0x0000000000000000
-DATA ·crccleconskp+56(SB)/8, $0x00000000dd45aab8 // R5
-DATA ·crccleconskp+64(SB)/8, $0x0000000000000000
-DATA ·crccleconskp+72(SB)/8, $0x00000000dea713f1 // u'
-DATA ·crccleconskp+80(SB)/8, $0x0000000000000000
-DATA ·crccleconskp+88(SB)/8, $0x0000000105ec76f0 // P'(x) << 1
-
-GLOBL ·crccleconskp(SB), RODATA, $144
-
-// func hasVectorFacility() bool
-TEXT ·hasVectorFacility(SB), NOSPLIT, $24-1
-	MOVD  $x-24(SP), R1
-	XC    $24, 0(R1), 0(R1) // clear the storage
-	MOVD  $2, R0            // R0 is the number of double words stored -1
-	WORD  $0xB2B01000       // STFLE 0(R1)
-	XOR   R0, R0            // reset the value of R0
-	MOVBZ z-8(SP), R1
-	AND   $0x40, R1
-	BEQ   novector
-
-vectorinstalled:
-	// check if the vector instruction has been enabled
-	VLEIB  $0, $0xF, V16
-	VLGVB  $0, V16, R1
-	CMPBNE R1, $0xF, novector
-	MOVB   $1, ret+0(FP)      // have vx
-	RET
-
-novector:
-	MOVB $0, ret+0(FP) // no vx
-	RET
-
-// The CRC-32 function(s) use these calling conventions:
-//
-// Parameters:
-//
-//      R2:    Initial CRC value, typically ~0; and final CRC (return) value.
-//      R3:    Input buffer pointer, performance might be improved if the
-//             buffer is on a doubleword boundary.
-//      R4:    Length of the buffer, must be 64 bytes or greater.
-//
-// Register usage:
-//
-//      R5:     CRC-32 constant pool base pointer.
-//      V0:     Initial CRC value and intermediate constants and results.
-//      V1..V4: Data for CRC computation.
-//      V5..V8: Next data chunks that are fetched from the input buffer.
-//
-//      V9..V14: CRC-32 constants.
-
-// func vectorizedIEEE(crc uint32, p []byte) uint32
-TEXT ·vectorizedIEEE(SB), NOSPLIT, $0
-	MOVWZ crc+0(FP), R2    // R2 stores the CRC value
-	MOVD  p+8(FP), R3      // data pointer
-	MOVD  p_len+16(FP), R4 // len(p)
-
-	MOVD $·crcleconskp(SB), R5
-	BR   vectorizedBody<>(SB)
-
-// func vectorizedCastagnoli(crc uint32, p []byte) uint32
-TEXT ·vectorizedCastagnoli(SB), NOSPLIT, $0
-	MOVWZ crc+0(FP), R2    // R2 stores the CRC value
-	MOVD  p+8(FP), R3      // data pointer
-	MOVD  p_len+16(FP), R4 // len(p)
-
-	// R5: crc-32 constant pool base pointer, constant is used to reduce crc
-	MOVD $·crccleconskp(SB), R5
-	BR   vectorizedBody<>(SB)
-
-TEXT vectorizedBody<>(SB), NOSPLIT, $0
-	XOR $0xffffffff, R2                         // NOTW R2
-	VLM 0(R5), CONST_PERM_LE2BE, CONST_CRC_POLY
-
-	// Load the initial CRC value into the rightmost word of V0
-	VZERO V0
-	VLVGF $3, R2, V0
-
-	// Crash if the input size is less than 64-bytes.
-	CMP R4, $64
-	BLT crash
-
-	// Load a 64-byte data chunk and XOR with CRC
-	VLM 0(R3), V1, V4 // 64-bytes into V1..V4
-
-	// Reflect the data if the CRC operation is in the bit-reflected domain
-	VPERM V1, V1, CONST_PERM_LE2BE, V1
-	VPERM V2, V2, CONST_PERM_LE2BE, V2
-	VPERM V3, V3, CONST_PERM_LE2BE, V3
-	VPERM V4, V4, CONST_PERM_LE2BE, V4
-
-	VX  V0, V1, V1 // V1 ^= CRC
-	ADD $64, R3    // BUF = BUF + 64
-	ADD $(-64), R4
-
-	// Check remaining buffer size and jump to proper folding method
-	CMP R4, $64
-	BLT less_than_64bytes
-
-fold_64bytes_loop:
-	// Load the next 64-byte data chunk into V5 to V8
-	VLM   0(R3), V5, V8
-	VPERM V5, V5, CONST_PERM_LE2BE, V5
-	VPERM V6, V6, CONST_PERM_LE2BE, V6
-	VPERM V7, V7, CONST_PERM_LE2BE, V7
-	VPERM V8, V8, CONST_PERM_LE2BE, V8
-
-	// Perform a GF(2) multiplication of the doublewords in V1 with
-	// the reduction constants in V0.  The intermediate result is
-	// then folded (accumulated) with the next data chunk in V5 and
-	// stored in V1.  Repeat this step for the register contents
-	// in V2, V3, and V4 respectively.
-
-	VGFMAG CONST_R2R1, V1, V5, V1
-	VGFMAG CONST_R2R1, V2, V6, V2
-	VGFMAG CONST_R2R1, V3, V7, V3
-	VGFMAG CONST_R2R1, V4, V8, V4
-
-	// Adjust buffer pointer and length for next loop
-	ADD $64, R3    // BUF = BUF + 64
-	ADD $(-64), R4 // LEN = LEN - 64
-
-	CMP R4, $64
-	BGE fold_64bytes_loop
-
-less_than_64bytes:
-	// Fold V1 to V4 into a single 128-bit value in V1
-	VGFMAG CONST_R4R3, V1, V2, V1
-	VGFMAG CONST_R4R3, V1, V3, V1
-	VGFMAG CONST_R4R3, V1, V4, V1
-
-	// Check whether to continue with 64-bit folding
-	CMP R4, $16
-	BLT final_fold
-
-fold_16bytes_loop:
-	VL    0(R3), V2                    // Load next data chunk
-	VPERM V2, V2, CONST_PERM_LE2BE, V2
-
-	VGFMAG CONST_R4R3, V1, V2, V1 // Fold next data chunk
-
-	// Adjust buffer pointer and size for folding next data chunk
-	ADD $16, R3
-	ADD $-16, R4
-
-	// Process remaining data chunks
-	CMP R4, $16
-	BGE fold_16bytes_loop
-
-final_fold:
-	VLEIB $7, $0x40, V9
-	VSRLB V9, CONST_R4R3, V0
-	VLEIG $0, $1, V0
-
-	VGFMG V0, V1, V1
-
-	VLEIB  $7, $0x20, V9        // Shift by words
-	VSRLB  V9, V1, V2           // Store remaining bits in V2
-	VUPLLF V1, V1               // Split rightmost doubleword
-	VGFMAG CONST_R5, V1, V2, V1 // V1 = (V1 * R5) XOR V2
-
-	// The input values to the Barret reduction are the degree-63 polynomial
-	// in V1 (R(x)), degree-32 generator polynomial, and the reduction
-	// constant u.  The Barret reduction result is the CRC value of R(x) mod
-	// P(x).
-	//
-	// The Barret reduction algorithm is defined as:
-	//
-	//    1. T1(x) = floor( R(x) / x^32 ) GF2MUL u
-	//    2. T2(x) = floor( T1(x) / x^32 ) GF2MUL P(x)
-	//    3. C(x)  = R(x) XOR T2(x) mod x^32
-	//
-	// Note: To compensate the division by x^32, use the vector unpack
-	// instruction to move the leftmost word into the leftmost doubleword
-	// of the vector register.  The rightmost doubleword is multiplied
-	// with zero to not contribute to the intermedate results.
-
-	// T1(x) = floor( R(x) / x^32 ) GF2MUL u
-	VUPLLF V1, V2
-	VGFMG  CONST_RU_POLY, V2, V2
-
-	// Compute the GF(2) product of the CRC polynomial in VO with T1(x) in
-	// V2 and XOR the intermediate result, T2(x),  with the value in V1.
-	// The final result is in the rightmost word of V2.
-
-	VUPLLF V2, V2
-	VGFMAG CONST_CRC_POLY, V2, V1, V2
-
-done:
-	VLGVF $2, V2, R2
-	XOR   $0xffffffff, R2  // NOTW R2
-	MOVWZ R2, ret + 32(FP)
-	RET
-
-crash:
-	MOVD $0, (R0) // input size is less than 64-bytes

vendor/github.com/qiangxue/fasthttp-routing/LICENSE

@@ -1,22 +0,0 @@
-The BSD 3-Clause License
-
-Copyright (c) 2016, Qiang Xue
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification, are permitted provided
-that the following conditions are met:
-
-1. Redistributions of source code must retain the above copyright notice, this list of conditions
-   and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
-   the following disclaimer in the documentation and/or other materials provided with the distribution.
-3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or
-   promote products derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/qiangxue/fasthttp-routing/README.md

@@ -1,244 +0,0 @@
-# fasthttp-routing
-
-[![GoDoc](https://godoc.org/github.com/qiangxue/fasthttp-routing?status.png)](http://godoc.org/github.com/qiangxue/fasthttp-routing)
-[![Go Report](http://goreportcard.com/badge/qiangxue/fasthttp-routing)](http://goreportcard.com/report/qiangxue/fasthttp-routing)
-
-## Description
-
-fasthttp-routing is a Go package that is adapted from [ozzo-routing](https://github.com/go-ozzo/ozzo-routing) to provide
-fast and powerful routing features for the high-performance [fasthttp](https://github.com/valyala/fasthttp) server.
-The package has the following features:
-
-* middleware pipeline architecture, similar to that of the [Express framework](http://expressjs.com).
-* extremely fast request routing with zero dynamic memory allocation
-* modular code organization through route grouping
-* flexible URL path matching, supporting URL parameters and regular expressions
-* URL creation according to the predefined routes
-
-## Requirements
-
-Go 1.5 or above.
-
-## Installation
-
-Run the following command to install the package:
-
-```
-go get github.com/qiangxue/fasthttp-routing
-```
-
-## Getting Started
-
-Create a `server.go` file with the following content:
-
-```go
-package main
-
-import (
-	"fmt"
-
-	"github.com/qiangxue/fasthttp-routing"
-	"github.com/valyala/fasthttp"
-)
-
-func main() {
-	router := routing.New()
-	
-	router.Get("/", func(c *routing.Context) error {
-		fmt.Fprintf(c, "Hello, world!")
-		return nil
-	})
-	
-	panic(fasthttp.ListenAndServe(":8080", router.HandleRequest))
-}
-```
-
-Now run the following command to start the Web server:
-
-```
-go run server.go
-```
-
-You should be able to access URLs such as `http://localhost:8080`.
-
-
-### Routes
-
-ozzo-routing works by building a routing table in a router and then dispatching HTTP requests to the matching handlers 
-found in the routing table. An intuitive illustration of a routing table is as follows:
-
-
-Routes              |  Handlers
---------------------|-----------------
-`GET /users`        |  m1, m2, h1, ...
-`POST /users`       |  m1, m2, h2, ...
-`PUT /users/<id>`   |  m1, m2, h3, ...
-`DELETE /users/<id>`|  m1, m2, h4, ...
-
-
-For an incoming request `GET /users`, the first route would match and the handlers m1, m2, and h1 would be executed.
-If the request is `PUT /users/123`, the third route would match and the corresponding handlers would be executed.
-Note that the token `<id>` can match any number of non-slash characters and the matching part can be accessed as 
-a path parameter value in the handlers.
-
-**If an incoming request matches multiple routes in the table, the route added first to the table will take precedence.
-All other matching routes will be ignored.**
-
-The actual implementation of the routing table uses a variant of the radix tree data structure, which makes the routing
-process as fast as working with a hash table, thanks to the inspiration from [httprouter](https://github.com/julienschmidt/httprouter).
-
-To add a new route and its handlers to the routing table, call the `To` method like the following:
-  
-```go
-router := routing.New()
-router.To("GET", "/users", m1, m2, h1)
-router.To("POST", "/users", m1, m2, h2)
-```
-
-You can also use shortcut methods, such as `Get`, `Post`, `Put`, etc., which are named after the HTTP method names:
- 
-```go
-router.Get("/users", m1, m2, h1)
-router.Post("/users", m1, m2, h2)
-```
-
-If you have multiple routes with the same URL path but different HTTP methods, like the above example, you can 
-chain them together as follows,
-
-```go
-router.Get("/users", m1, m2, h1).Post(m1, m2, h2)
-```
-
-If you want to use the same set of handlers to handle the same URL path but different HTTP methods, you can take
-the following shortcut:
-
-```go
-router.To("GET,POST", "/users", m1, m2, h)
-```
-
-A route may contain parameter tokens which are in the format of `<name:pattern>`, where `name` stands for the parameter
-name, and `pattern` is a regular expression which the parameter value should match. A token `<name>` is equivalent
-to `<name:[^/]*>`, i.e., it matches any number of non-slash characters. At the end of a route, an asterisk character
-can be used to match any number of arbitrary characters. Below are some examples:
-
-* `/users/<username>`: matches `/users/admin`
-* `/users/accnt-<id:\d+>`: matches `/users/accnt-123`, but not `/users/accnt-admin`
-* `/users/<username>/*`: matches `/users/admin/profile/address`
-
-When a URL path matches a route, the matching parameters on the URL path can be accessed via `Context.Param()`:
-
-```go
-router := routing.New()
-
-router.Get("/users/<username>", func (c *routing.Context) error {
-	fmt.Fprintf(c, "Name: %v", c.Param("username"))
-	return nil
-})
-```
-
-
-### Route Groups
-
-Route group is a way of grouping together the routes which have the same route prefix. The routes in a group also
-share the same handlers that are registered with the group via its `Use` method. For example,
-
-```go
-router := routing.New()
-api := router.Group("/api")
-api.Use(m1, m2)
-api.Get("/users", h1).Post(h2)
-api.Put("/users/<id>", h3).Delete(h4)
-```
-
-The above `/api` route group establishes the following routing table:
-
-
-Routes                  |  Handlers
-------------------------|-------------
-`GET /api/users`        |  m1, m2, h1, ...
-`POST /api/users`       |  m1, m2, h2, ...
-`PUT /api/users/<id>`   |  m1, m2, h3, ...
-`DELETE /api/users/<id>`|  m1, m2, h4, ...
-
-
-As you can see, all these routes have the same route prefix `/api` and the handlers `m1` and `m2`. In other similar
-routing frameworks, the handlers registered with a route group are also called *middlewares*.
-
-Route groups can be nested. That is, a route group can create a child group by calling the `Group()` method. The router
-serves as the top level route group. A child group inherits the handlers registered with its parent group. For example, 
-
-```go
-router := routing.New()
-router.Use(m1)
-
-api := router.Group("/api")
-api.Use(m2)
-
-users := group.Group("/users")
-users.Use(m3)
-users.Put("/<id>", h1)
-```
-
-Because the router serves as the parent of the `api` group which is the parent of the `users` group, 
-the `PUT /api/users/<id>` route is associated with the handlers `m1`, `m2`, `m3`, and `h1`.
-
-
-### Router
-
-Router manages the routing table and dispatches incoming requests to appropriate handlers. A router instance is created
-by calling the `routing.New()` method.
-
-To hook up router with fasthttp, use the following code:
-
-```go
-router := routing.New()
-fasthttp.ListenAndServe(":8080", router.HandleRequest) 
-```
-
-
-### Handlers
-
-A handler is a function with the signature `func(*routing.Context) error`. A handler is executed by the router if
-the incoming request URL path matches the route that the handler is associated with. Through the `routing.Context` 
-parameter, you can access the request information in handlers.
-
-A route may be associated with multiple handlers. These handlers will be executed in the order that they are registered
-to the route. The execution sequence can be terminated in the middle using one of the following two methods:
-
-* A handler returns an error: the router will skip the rest of the handlers and handle the returned error.
-* A handler calls `Context.Abort()`: the router will simply skip the rest of the handlers. There is no error to be handled.
- 
-A handler can call `Context.Next()` to explicitly execute the rest of the unexecuted handlers and take actions after
-they finish execution. For example, a response compression handler may start the output buffer, call `Context.Next()`,
-and then compress and send the output to response.
-
-
-### Context
-
-For each incoming request, a `routing.Context` object is passed through the relevant handlers. Because `routing.Context`
-embeds `fasthttp.RequestCtx`, you can access all properties and methods provided by the latter.
- 
-Additionally, the `Context.Param()` method allows handlers to access the URL path parameters that match the current route.
-Using `Context.Get()` and `Context.Set()`, handlers can share data between each other. For example, an authentication
-handler can store the authenticated user identity by calling `Context.Set()`, and other handlers can retrieve back
-the identity information by calling `Context.Get()`.
-
-Context also provides a handy `WriteData()` method that can be used to write data of arbitrary type to the response.
-The `WriteData()` method can also be overridden (by replacement) to achieve more versatile response data writing. 
-
-
-### Error Handling
-
-A handler may return an error indicating some erroneous condition. Sometimes, a handler or the code it calls may cause
-a panic. Both should be handled properly to ensure best user experience. It is recommended that you use 
-the `fault.Recover` handler or a similar error handler to handle these errors.
-
-If an error is not handled by any handler, the router will handle it by calling its `handleError()` method which
-simply sets an appropriate HTTP status code and writes the error message to the response.
-
-When an incoming request has no matching route, the router will call the handlers registered via the `Router.NotFound()`
-method. All the handlers registered via `Router.Use()` will also be called in advance. By default, the following two
-handlers are registered with `Router.NotFound()`:
-
-* `routing.MethodNotAllowedHandler`: a handler that sends an `Allow` HTTP header indicating the allowed HTTP methods for a requested URL
-* `routing.NotFoundHandler`: a handler triggering 404 HTTP error

vendor/github.com/qiangxue/fasthttp-routing/context.go

@@ -1,126 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package routing
-
-import (
-	"fmt"
-
-	"github.com/valyala/fasthttp"
-)
-
-// SerializeFunc serializes the given data of arbitrary type into a byte array.
-type SerializeFunc func(data interface{}) ([]byte, error)
-
-// Context represents the contextual data and environment while processing an incoming HTTP request.
-type Context struct {
-	*fasthttp.RequestCtx
-
-	Serialize SerializeFunc // the function serializing the given data of arbitrary type into a byte array.
-
-	router   *Router
-	pnames   []string               // list of route parameter names
-	pvalues  []string               // list of parameter values corresponding to pnames
-	data     map[string]interface{} // data items managed by Get and Set
-	index    int                    // the index of the currently executing handler in handlers
-	handlers []Handler              // the handlers associated with the current route
-}
-
-// Router returns the Router that is handling the incoming HTTP request.
-func (c *Context) Router() *Router {
-	return c.router
-}
-
-// Param returns the named parameter value that is found in the URL path matching the current route.
-// If the named parameter cannot be found, an empty string will be returned.
-func (c *Context) Param(name string) string {
-	for i, n := range c.pnames {
-		if n == name {
-			return c.pvalues[i]
-		}
-	}
-	return ""
-}
-
-// Get returns the named data item previously registered with the context by calling Set.
-// If the named data item cannot be found, nil will be returned.
-func (c *Context) Get(name string) interface{} {
-	return c.data[name]
-}
-
-// Set stores the named data item in the context so that it can be retrieved later.
-func (c *Context) Set(name string, value interface{}) {
-	if c.data == nil {
-		c.data = make(map[string]interface{})
-	}
-	c.data[name] = value
-}
-
-// Next calls the rest of the handlers associated with the current route.
-// If any of these handlers returns an error, Next will return the error and skip the following handlers.
-// Next is normally used when a handler needs to do some postprocessing after the rest of the handlers
-// are executed.
-func (c *Context) Next() error {
-	c.index++
-	for n := len(c.handlers); c.index < n; c.index++ {
-		if err := c.handlers[c.index](c); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// Abort skips the rest of the handlers associated with the current route.
-// Abort is normally used when a handler handles the request normally and wants to skip the rest of the handlers.
-// If a handler wants to indicate an error condition, it should simply return the error without calling Abort.
-func (c *Context) Abort() {
-	c.index = len(c.handlers)
-}
-
-// URL creates a URL using the named route and the parameter values.
-// The parameters should be given in the sequence of name1, value1, name2, value2, and so on.
-// If a parameter in the route is not provided a value, the parameter token will remain in the resulting URL.
-// Parameter values will be properly URL encoded.
-// The method returns an empty string if the URL creation fails.
-func (c *Context) URL(route string, pairs ...interface{}) string {
-	if r := c.router.routes[route]; r != nil {
-		return r.URL(pairs...)
-	}
-	return ""
-}
-
-// WriteData writes the given data of arbitrary type to the response.
-// The method calls the Serialize() method to convert the data into a byte array and then writes
-// the byte array to the response.
-func (c *Context) WriteData(data interface{}) (err error) {
-	var bytes []byte
-	if bytes, err = c.Serialize(data); err == nil {
-		_, err = c.Write(bytes)
-	}
-	return
-}
-
-// init sets the request and response of the context and resets all other properties.
-func (c *Context) init(ctx *fasthttp.RequestCtx) {
-	c.RequestCtx = ctx
-	c.data = nil
-	c.index = -1
-	c.Serialize = Serialize
-}
-
-// Serialize converts the given data into a byte array.
-// If the data is neither a byte array nor a string, it will call fmt.Sprint to convert it into a string.
-func Serialize(data interface{}) (bytes []byte, err error) {
-	switch data.(type) {
-	case []byte:
-		return data.([]byte), nil
-	case string:
-		return []byte(data.(string)), nil
-	default:
-		if data != nil {
-			return []byte(fmt.Sprint(data)), nil
-		}
-	}
-	return nil, nil
-}

vendor/github.com/qiangxue/fasthttp-routing/error.go

@@ -1,40 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package routing
-
-import "net/http"
-
-// HTTPError represents an HTTP error with HTTP status code and error message
-type HTTPError interface {
-	error
-	// StatusCode returns the HTTP status code of the error
-	StatusCode() int
-}
-
-// Error contains the error information reported by calling Context.Error().
-type httpError struct {
-	Status  int    `json:"status" xml:"status"`
-	Message string `json:"message" xml:"message"`
-}
-
-// NewHTTPError creates a new HttpError instance.
-// If the error message is not given, http.StatusText() will be called
-// to generate the message based on the status code.
-func NewHTTPError(status int, message ...string) HTTPError {
-	if len(message) > 0 {
-		return &httpError{status, message[0]}
-	}
-	return &httpError{status, http.StatusText(status)}
-}
-
-// Error returns the error message.
-func (e *httpError) Error() string {
-	return e.Message
-}
-
-// StatusCode returns the HTTP status code.
-func (e *httpError) StatusCode() int {
-	return e.Status
-}

vendor/github.com/qiangxue/fasthttp-routing/group.go

@@ -1,107 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package routing
-
-import (
-	"strings"
-)
-
-// RouteGroup represents a group of routes that share the same path prefix.
-type RouteGroup struct {
-	prefix   string
-	router   *Router
-	handlers []Handler
-}
-
-// newRouteGroup creates a new RouteGroup with the given path prefix, router, and handlers.
-func newRouteGroup(prefix string, router *Router, handlers []Handler) *RouteGroup {
-	return &RouteGroup{
-		prefix:   prefix,
-		router:   router,
-		handlers: handlers,
-	}
-}
-
-// Get adds a GET route to the router with the given route path and handlers.
-func (r *RouteGroup) Get(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Get(handlers...)
-}
-
-// Post adds a POST route to the router with the given route path and handlers.
-func (r *RouteGroup) Post(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Post(handlers...)
-}
-
-// Put adds a PUT route to the router with the given route path and handlers.
-func (r *RouteGroup) Put(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Put(handlers...)
-}
-
-// Patch adds a PATCH route to the router with the given route path and handlers.
-func (r *RouteGroup) Patch(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Patch(handlers...)
-}
-
-// Delete adds a DELETE route to the router with the given route path and handlers.
-func (r *RouteGroup) Delete(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Delete(handlers...)
-}
-
-// Connect adds a CONNECT route to the router with the given route path and handlers.
-func (r *RouteGroup) Connect(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Connect(handlers...)
-}
-
-// Head adds a HEAD route to the router with the given route path and handlers.
-func (r *RouteGroup) Head(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Head(handlers...)
-}
-
-// Options adds an OPTIONS route to the router with the given route path and handlers.
-func (r *RouteGroup) Options(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Options(handlers...)
-}
-
-// Trace adds a TRACE route to the router with the given route path and handlers.
-func (r *RouteGroup) Trace(path string, handlers ...Handler) *Route {
-	return newRoute(path, r).Trace(handlers...)
-}
-
-// Any adds a route with the given route, handlers, and the HTTP methods as listed in routing.Methods.
-func (r *RouteGroup) Any(path string, handlers ...Handler) *Route {
-	route := newRoute(path, r)
-	for _, method := range Methods {
-		route.add(method, handlers)
-	}
-	return route
-}
-
-// To adds a route to the router with the given HTTP methods, route path, and handlers.
-// Multiple HTTP methods should be separated by commas (without any surrounding spaces).
-func (r *RouteGroup) To(methods, path string, handlers ...Handler) *Route {
-	route := newRoute(path, r)
-	for _, method := range strings.Split(methods, ",") {
-		route.add(method, handlers)
-	}
-	return route
-}
-
-// Group creates a RouteGroup with the given route path prefix and handlers.
-// The new group will combine the existing path prefix with the new one.
-// If no handler is provided, the new group will inherit the handlers registered
-// with the current group.
-func (r *RouteGroup) Group(prefix string, handlers ...Handler) *RouteGroup {
-	if len(handlers) == 0 {
-		handlers = make([]Handler, len(r.handlers))
-		copy(handlers, r.handlers)
-	}
-	return newRouteGroup(r.prefix+prefix, r.router, handlers)
-}
-
-// Use registers one or multiple handlers to the current route group.
-// These handlers will be shared by all routes belong to this group and its subgroups.
-func (r *RouteGroup) Use(handlers ...Handler) {
-	r.handlers = append(r.handlers, handlers...)
-}

vendor/github.com/qiangxue/fasthttp-routing/route.go

@@ -1,161 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package routing
-
-import (
-	"fmt"
-	"net/url"
-	"strings"
-)
-
-// Route represents a URL path pattern that can be used to match requested URLs.
-type Route struct {
-	group      *RouteGroup
-	name, path string
-	template   string
-}
-
-// newRoute creates a new Route with the given route path and route group.
-func newRoute(path string, group *RouteGroup) *Route {
-	path = group.prefix + path
-	name := path
-
-	// an asterisk at the end matches any number of characters
-	if strings.HasSuffix(path, "*") {
-		path = path[:len(path)-1] + "<:.*>"
-	}
-
-	route := &Route{
-		group:    group,
-		name:     name,
-		path:     path,
-		template: buildURLTemplate(path),
-	}
-	group.router.routes[name] = route
-
-	return route
-}
-
-// Name sets the name of the route.
-// This method will update the registration of the route in the router as well.
-func (r *Route) Name(name string) *Route {
-	r.name = name
-	r.group.router.routes[name] = r
-	return r
-}
-
-// Get adds the route to the router using the GET HTTP method.
-func (r *Route) Get(handlers ...Handler) *Route {
-	return r.add("GET", handlers)
-}
-
-// Post adds the route to the router using the POST HTTP method.
-func (r *Route) Post(handlers ...Handler) *Route {
-	return r.add("POST", handlers)
-}
-
-// Put adds the route to the router using the PUT HTTP method.
-func (r *Route) Put(handlers ...Handler) *Route {
-	return r.add("PUT", handlers)
-}
-
-// Patch adds the route to the router using the PATCH HTTP method.
-func (r *Route) Patch(handlers ...Handler) *Route {
-	return r.add("PATCH", handlers)
-}
-
-// Delete adds the route to the router using the DELETE HTTP method.
-func (r *Route) Delete(handlers ...Handler) *Route {
-	return r.add("DELETE", handlers)
-}
-
-// Connect adds the route to the router using the CONNECT HTTP method.
-func (r *Route) Connect(handlers ...Handler) *Route {
-	return r.add("CONNECT", handlers)
-}
-
-// Head adds the route to the router using the HEAD HTTP method.
-func (r *Route) Head(handlers ...Handler) *Route {
-	return r.add("HEAD", handlers)
-}
-
-// Options adds the route to the router using the OPTIONS HTTP method.
-func (r *Route) Options(handlers ...Handler) *Route {
-	return r.add("OPTIONS", handlers)
-}
-
-// Trace adds the route to the router using the TRACE HTTP method.
-func (r *Route) Trace(handlers ...Handler) *Route {
-	return r.add("TRACE", handlers)
-}
-
-// To adds the route to the router with the given HTTP methods and handlers.
-// Multiple HTTP methods should be separated by commas (without any surrounding spaces).
-func (r *Route) To(methods string, handlers ...Handler) *Route {
-	for _, method := range strings.Split(methods, ",") {
-		r.add(method, handlers)
-	}
-	return r
-}
-
-// URL creates a URL using the current route and the given parameters.
-// The parameters should be given in the sequence of name1, value1, name2, value2, and so on.
-// If a parameter in the route is not provided a value, the parameter token will remain in the resulting URL.
-// The method will perform URL encoding for all given parameter values.
-func (r *Route) URL(pairs ...interface{}) (s string) {
-	s = r.template
-	for i := 0; i < len(pairs); i++ {
-		name := fmt.Sprintf("<%v>", pairs[i])
-		value := ""
-		if i < len(pairs)-1 {
-			value = url.QueryEscape(fmt.Sprint(pairs[i+1]))
-		}
-		s = strings.Replace(s, name, value, -1)
-	}
-	return
-}
-
-// add registers the route, the specified HTTP method and the handlers to the router.
-// The handlers will be combined with the handlers of the route group.
-func (r *Route) add(method string, handlers []Handler) *Route {
-	hh := combineHandlers(r.group.handlers, handlers)
-	r.group.router.add(method, r.path, hh)
-	return r
-}
-
-// buildURLTemplate converts a route pattern into a URL template by removing regular expressions in parameter tokens.
-func buildURLTemplate(path string) string {
-	template, start, end := "", -1, -1
-	for i := 0; i < len(path); i++ {
-		if path[i] == '<' && start < 0 {
-			start = i
-		} else if path[i] == '>' && start >= 0 {
-			name := path[start+1 : i]
-			for j := start + 1; j < i; j++ {
-				if path[j] == ':' {
-					name = path[start+1 : j]
-					break
-				}
-			}
-			template += path[end+1:start] + "<" + name + ">"
-			end = i
-			start = -1
-		}
-	}
-	if end < 0 {
-		template = path
-	} else if end < len(path)-1 {
-		template += path[end+1:]
-	}
-	return template
-}
-
-// combineHandlers merges two lists of handlers into a new list.
-func combineHandlers(h1 []Handler, h2 []Handler) []Handler {
-	hh := make([]Handler, len(h1)+len(h2))
-	copy(hh, h1)
-	copy(hh[len(h1):], h2)
-	return hh
-}

vendor/github.com/qiangxue/fasthttp-routing/router.go

@@ -1,169 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package routing provides high performance and powerful HTTP routing capabilities.
-package routing
-
-import (
-	"net/http"
-	"sort"
-	"strings"
-	"sync"
-
-	"github.com/valyala/fasthttp"
-)
-
-type (
-	// Handler is the function for handling HTTP requests.
-	Handler func(*Context) error
-
-	// Router manages routes and dispatches HTTP requests to the handlers of the matching routes.
-	Router struct {
-		RouteGroup
-		pool             sync.Pool
-		routes           map[string]*Route
-		stores           map[string]routeStore
-		maxParams        int
-		notFound         []Handler
-		notFoundHandlers []Handler
-	}
-
-	// routeStore stores route paths and the corresponding handlers.
-	routeStore interface {
-		Add(key string, data interface{}) int
-		Get(key string, pvalues []string) (data interface{}, pnames []string)
-		String() string
-	}
-)
-
-// Methods lists all supported HTTP methods by Router.
-var Methods = []string{
-	"CONNECT",
-	"DELETE",
-	"GET",
-	"HEAD",
-	"OPTIONS",
-	"PATCH",
-	"POST",
-	"PUT",
-	"TRACE",
-}
-
-// New creates a new Router object.
-func New() *Router {
-	r := &Router{
-		routes: make(map[string]*Route),
-		stores: make(map[string]routeStore),
-	}
-	r.RouteGroup = *newRouteGroup("", r, make([]Handler, 0))
-	r.NotFound(MethodNotAllowedHandler, NotFoundHandler)
-	r.pool.New = func() interface{} {
-		return &Context{
-			pvalues: make([]string, r.maxParams),
-			router:  r,
-		}
-	}
-	return r
-}
-
-// HandleRequest handles the HTTP request.
-func (r *Router) HandleRequest(ctx *fasthttp.RequestCtx) {
-	c := r.pool.Get().(*Context)
-	c.init(ctx)
-	c.handlers, c.pnames = r.find(string(ctx.Method()), string(ctx.Path()), c.pvalues)
-	if err := c.Next(); err != nil {
-		r.handleError(c, err)
-	}
-	r.pool.Put(c)
-}
-
-// Route returns the named route.
-// Nil is returned if the named route cannot be found.
-func (r *Router) Route(name string) *Route {
-	return r.routes[name]
-}
-
-// Use appends the specified handlers to the router and shares them with all routes.
-func (r *Router) Use(handlers ...Handler) {
-	r.RouteGroup.Use(handlers...)
-	r.notFoundHandlers = combineHandlers(r.handlers, r.notFound)
-}
-
-// NotFound specifies the handlers that should be invoked when the router cannot find any route matching a request.
-// Note that the handlers registered via Use will be invoked first in this case.
-func (r *Router) NotFound(handlers ...Handler) {
-	r.notFound = handlers
-	r.notFoundHandlers = combineHandlers(r.handlers, r.notFound)
-}
-
-// handleError is the error handler for handling any unhandled errors.
-func (r *Router) handleError(c *Context, err error) {
-	if httpError, ok := err.(HTTPError); ok {
-		c.Error(httpError.Error(), httpError.StatusCode())
-	} else {
-		c.Error(err.Error(), http.StatusInternalServerError)
-	}
-}
-
-func (r *Router) add(method, path string, handlers []Handler) {
-	store := r.stores[method]
-	if store == nil {
-		store = newStore()
-		r.stores[method] = store
-	}
-	if n := store.Add(path, handlers); n > r.maxParams {
-		r.maxParams = n
-	}
-}
-
-func (r *Router) find(method, path string, pvalues []string) (handlers []Handler, pnames []string) {
-	var hh interface{}
-	if store := r.stores[method]; store != nil {
-		hh, pnames = store.Get(path, pvalues)
-	}
-	if hh != nil {
-		return hh.([]Handler), pnames
-	}
-	return r.notFoundHandlers, pnames
-}
-
-func (r *Router) findAllowedMethods(path string) map[string]bool {
-	methods := make(map[string]bool)
-	pvalues := make([]string, r.maxParams)
-	for m, store := range r.stores {
-		if handlers, _ := store.Get(path, pvalues); handlers != nil {
-			methods[m] = true
-		}
-	}
-	return methods
-}
-
-// NotFoundHandler returns a 404 HTTP error indicating a request has no matching route.
-func NotFoundHandler(*Context) error {
-	return NewHTTPError(http.StatusNotFound)
-}
-
-// MethodNotAllowedHandler handles the situation when a request has matching route without matching HTTP method.
-// In this case, the handler will respond with an Allow HTTP header listing the allowed HTTP methods.
-// Otherwise, the handler will do nothing and let the next handler (usually a NotFoundHandler) to handle the problem.
-func MethodNotAllowedHandler(c *Context) error {
-	methods := c.Router().findAllowedMethods(string(c.Path()))
-	if len(methods) == 0 {
-		return nil
-	}
-	methods["OPTIONS"] = true
-	ms := make([]string, len(methods))
-	i := 0
-	for method := range methods {
-		ms[i] = method
-		i++
-	}
-	sort.Strings(ms)
-	c.Response.Header.Set("Allow", strings.Join(ms, ", "))
-	if string(c.Method()) != "OPTIONS" {
-		c.Response.SetStatusCode(http.StatusMethodNotAllowed)
-	}
-	c.Abort()
-	return nil
-}

vendor/github.com/qiangxue/fasthttp-routing/store.go

@@ -1,317 +0,0 @@
-// Copyright 2016 Qiang Xue. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package routing
-
-import (
-	"fmt"
-	"math"
-	"regexp"
-	"strings"
-)
-
-// store is a radix tree that supports storing data with parametric keys and retrieving them back with concrete keys.
-// When retrieving a data item with a concrete key, the matching parameter names and values will be returned as well.
-// A parametric key is a string containing tokens in the format of "<name>", "<name:pattern>", or "<:pattern>".
-// Each token represents a single parameter.
-type store struct {
-	root  *node // the root node of the radix tree
-	count int   // the number of data nodes in the tree
-}
-
-// newStore creates a new store.
-func newStore() *store {
-	return &store{
-		root: &node{
-			static:    true,
-			children:  make([]*node, 256),
-			pchildren: make([]*node, 0),
-			pindex:    -1,
-			pnames:    []string{},
-		},
-	}
-}
-
-// Add adds a new data item with the given parametric key.
-// The number of parameters in the key is returned.
-func (s *store) Add(key string, data interface{}) int {
-	s.count++
-	return s.root.add(key, data, s.count)
-}
-
-// Get returns the data item matching the given concrete key.
-// If the data item was added to the store with a parametric key before, the matching
-// parameter names and values will be returned as well.
-func (s *store) Get(path string, pvalues []string) (data interface{}, pnames []string) {
-	data, pnames, _ = s.root.get(path, pvalues)
-	return
-}
-
-// String dumps the radix tree kept in the store as a string.
-func (s *store) String() string {
-	return s.root.print(0)
-}
-
-// node represents a radix trie node
-type node struct {
-	static bool // whether the node is a static node or param node
-
-	key  string      // the key identifying this node
-	data interface{} // the data associated with this node. nil if not a data node.
-
-	order    int // the order at which the data was added. used to be pick the first one when matching multiple
-	minOrder int // minimum order among all the child nodes and this node
-
-	children  []*node // child static nodes, indexed by the first byte of each child key
-	pchildren []*node // child param nodes
-
-	regex  *regexp.Regexp // regular expression for a param node containing regular expression key
-	pindex int            // the parameter index, meaningful only for param node
-	pnames []string       // the parameter names collected from the root till this node
-}
-
-// add adds a new data item to the tree rooted at the current node.
-// The number of parameters in the key is returned.
-func (n *node) add(key string, data interface{}, order int) int {
-	matched := 0
-
-	// find the common prefix
-	for ; matched < len(key) && matched < len(n.key); matched++ {
-		if key[matched] != n.key[matched] {
-			break
-		}
-	}
-
-	if matched == len(n.key) {
-		if matched == len(key) {
-			// the node key is the same as the key: make the current node as data node
-			// if the node is already a data node, ignore the new data since we only care the first matched node
-			if n.data == nil {
-				n.data = data
-				n.order = order
-			}
-			return n.pindex + 1
-		}
-
-		// the node key is a prefix of the key: create a child node
-		newKey := key[matched:]
-
-		// try adding to a static child
-		if child := n.children[newKey[0]]; child != nil {
-			if pn := child.add(newKey, data, order); pn >= 0 {
-				return pn
-			}
-		}
-		// try adding to a param child
-		for _, child := range n.pchildren {
-			if pn := child.add(newKey, data, order); pn >= 0 {
-				return pn
-			}
-		}
-
-		return n.addChild(newKey, data, order)
-	}
-
-	if matched == 0 || !n.static {
-		// no common prefix, or partial common prefix with a non-static node: should skip this node
-		return -1
-	}
-
-	// the node key shares a partial prefix with the key: split the node key
-	n1 := &node{
-		static:    true,
-		key:       n.key[matched:],
-		data:      n.data,
-		order:     n.order,
-		minOrder:  n.minOrder,
-		pchildren: n.pchildren,
-		children:  n.children,
-		pindex:    n.pindex,
-		pnames:    n.pnames,
-	}
-
-	n.key = key[0:matched]
-	n.data = nil
-	n.pchildren = make([]*node, 0)
-	n.children = make([]*node, 256)
-	n.children[n1.key[0]] = n1
-
-	return n.add(key, data, order)
-}
-
-// addChild creates static and param nodes to store the given data
-func (n *node) addChild(key string, data interface{}, order int) int {
-	// find the first occurrence of a param token
-	p0, p1 := -1, -1
-	for i := 0; i < len(key); i++ {
-		if p0 < 0 && key[i] == '<' {
-			p0 = i
-		}
-		if p0 >= 0 && key[i] == '>' {
-			p1 = i
-			break
-		}
-	}
-
-	if p0 > 0 && p1 > 0 || p1 < 0 {
-		// param token occurs after a static string, or no param token: create a static node
-		child := &node{
-			static:    true,
-			key:       key,
-			minOrder:  order,
-			children:  make([]*node, 256),
-			pchildren: make([]*node, 0),
-			pindex:    n.pindex,
-			pnames:    n.pnames,
-		}
-		n.children[key[0]] = child
-		if p1 > 0 {
-			// param token occurs after a static string
-			child.key = key[:p0]
-			n = child
-		} else {
-			// no param token: done adding the child
-			child.data = data
-			child.order = order
-			return child.pindex + 1
-		}
-	}
-
-	// add param node
-	child := &node{
-		static:    false,
-		key:       key[p0 : p1+1],
-		minOrder:  order,
-		children:  make([]*node, 256),
-		pchildren: make([]*node, 0),
-		pindex:    n.pindex,
-		pnames:    n.pnames,
-	}
-	pattern := ""
-	pname := key[p0+1 : p1]
-	for i := p0 + 1; i < p1; i++ {
-		if key[i] == ':' {
-			pname = key[p0+1 : i]
-			pattern = key[i+1 : p1]
-			break
-		}
-	}
-	if pattern != "" {
-		// the param token contains a regular expression
-		child.regex = regexp.MustCompile("^" + pattern)
-	}
-	pnames := make([]string, len(n.pnames)+1)
-	copy(pnames, n.pnames)
-	pnames[len(n.pnames)] = pname
-	child.pnames = pnames
-	child.pindex = len(pnames) - 1
-	n.pchildren = append(n.pchildren, child)
-
-	if p1 == len(key)-1 {
-		// the param token is at the end of the key
-		child.data = data
-		child.order = order
-		return child.pindex + 1
-	}
-
-	// process the rest of the key
-	return child.addChild(key[p1+1:], data, order)
-}
-
-// get returns the data item with the key matching the tree rooted at the current node
-func (n *node) get(key string, pvalues []string) (data interface{}, pnames []string, order int) {
-	order = math.MaxInt32
-
-repeat:
-	if n.static {
-		// check if the node key is a prefix of the given key
-		// a slightly optimized version of strings.HasPrefix
-		nkl := len(n.key)
-		if nkl > len(key) {
-			return
-		}
-		for i := nkl - 1; i >= 0; i-- {
-			if n.key[i] != key[i] {
-				return
-			}
-		}
-		key = key[nkl:]
-	} else if n.regex != nil {
-		// param node with regular expression
-		if n.regex.String() == "^.*" {
-			pvalues[n.pindex] = key
-			key = ""
-		} else if match := n.regex.FindStringIndex(key); match != nil {
-			pvalues[n.pindex] = key[0:match[1]]
-			key = key[match[1]:]
-		} else {
-			return
-		}
-	} else {
-		// param node matching non-"/" characters
-		i, kl := 0, len(key)
-		for ; i < kl; i++ {
-			if key[i] == '/' {
-				pvalues[n.pindex] = key[0:i]
-				key = key[i:]
-				break
-			}
-		}
-		if i == kl {
-			pvalues[n.pindex] = key
-			key = ""
-		}
-	}
-
-	if len(key) > 0 {
-		// find a static child that can match the rest of the key
-		if child := n.children[key[0]]; child != nil {
-			if len(n.pchildren) == 0 {
-				// use goto to avoid recursion when no param children
-				n = child
-				goto repeat
-			}
-			data, pnames, order = child.get(key, pvalues)
-		}
-	} else if n.data != nil {
-		// do not return yet: a param node may match an empty string with smaller order
-		data, pnames, order = n.data, n.pnames, n.order
-	}
-
-	// try matching param children
-	tvalues := pvalues
-	allocated := false
-	for _, child := range n.pchildren {
-		if child.minOrder >= order {
-			continue
-		}
-		if data != nil && !allocated {
-			tvalues = make([]string, len(pvalues))
-			allocated = true
-		}
-		if d, p, s := child.get(key, tvalues); d != nil && s < order {
-			if allocated {
-				for i := child.pindex; i < len(p); i++ {
-					pvalues[i] = tvalues[i]
-				}
-			}
-			data, pnames, order = d, p, s
-		}
-	}
-
-	return
-}
-
-func (n *node) print(level int) string {
-	r := fmt.Sprintf("%v{key: %v, regex: %v, data: %v, order: %v, minOrder: %v, pindex: %v, pnames: %v}\n", strings.Repeat(" ", level<<2), n.key, n.regex, n.data, n.order, n.minOrder, n.pindex, n.pnames)
-	for _, child := range n.children {
-		if child != nil {
-			r += child.print(level + 1)
-		}
-	}
-	for _, child := range n.pchildren {
-		r += child.print(level + 1)
-	}
-	return r
-}

vendor/github.com/valyala/bytebufferpool/LICENSE

@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2016 Aliaksandr Valialkin, VertaMedia
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-

vendor/github.com/valyala/bytebufferpool/README.md

@@ -1,21 +0,0 @@
-[![Build Status](https://travis-ci.org/valyala/bytebufferpool.svg)](https://travis-ci.org/valyala/bytebufferpool)
-[![GoDoc](https://godoc.org/github.com/valyala/bytebufferpool?status.svg)](http://godoc.org/github.com/valyala/bytebufferpool)
-[![Go Report](http://goreportcard.com/badge/valyala/bytebufferpool)](http://goreportcard.com/report/valyala/bytebufferpool)
-
-# bytebufferpool
-
-An implementation of a pool of byte buffers with anti-memory-waste protection.
-
-The pool may waste limited amount of memory due to fragmentation.
-This amount equals to the maximum total size of the byte buffers
-in concurrent use.
-
-# Benchmark results
-Currently bytebufferpool is fastest and most effective buffer pool written in Go.
-
-You can find results [here](https://omgnull.github.io/go-benchmark/buffer/).
-
-# bytebufferpool users
-
-* [fasthttp](https://github.com/valyala/fasthttp)
-* [quicktemplate](https://github.com/valyala/quicktemplate)

vendor/github.com/valyala/bytebufferpool/bytebuffer.go

@@ -1,111 +0,0 @@
-package bytebufferpool
-
-import "io"
-
-// ByteBuffer provides byte buffer, which can be used for minimizing
-// memory allocations.
-//
-// ByteBuffer may be used with functions appending data to the given []byte
-// slice. See example code for details.
-//
-// Use Get for obtaining an empty byte buffer.
-type ByteBuffer struct {
-
-	// B is a byte buffer to use in append-like workloads.
-	// See example code for details.
-	B []byte
-}
-
-// Len returns the size of the byte buffer.
-func (b *ByteBuffer) Len() int {
-	return len(b.B)
-}
-
-// ReadFrom implements io.ReaderFrom.
-//
-// The function appends all the data read from r to b.
-func (b *ByteBuffer) ReadFrom(r io.Reader) (int64, error) {
-	p := b.B
-	nStart := int64(len(p))
-	nMax := int64(cap(p))
-	n := nStart
-	if nMax == 0 {
-		nMax = 64
-		p = make([]byte, nMax)
-	} else {
-		p = p[:nMax]
-	}
-	for {
-		if n == nMax {
-			nMax *= 2
-			bNew := make([]byte, nMax)
-			copy(bNew, p)
-			p = bNew
-		}
-		nn, err := r.Read(p[n:])
-		n += int64(nn)
-		if err != nil {
-			b.B = p[:n]
-			n -= nStart
-			if err == io.EOF {
-				return n, nil
-			}
-			return n, err
-		}
-	}
-}
-
-// WriteTo implements io.WriterTo.
-func (b *ByteBuffer) WriteTo(w io.Writer) (int64, error) {
-	n, err := w.Write(b.B)
-	return int64(n), err
-}
-
-// Bytes returns b.B, i.e. all the bytes accumulated in the buffer.
-//
-// The purpose of this function is bytes.Buffer compatibility.
-func (b *ByteBuffer) Bytes() []byte {
-	return b.B
-}
-
-// Write implements io.Writer - it appends p to ByteBuffer.B
-func (b *ByteBuffer) Write(p []byte) (int, error) {
-	b.B = append(b.B, p...)
-	return len(p), nil
-}
-
-// WriteByte appends the byte c to the buffer.
-//
-// The purpose of this function is bytes.Buffer compatibility.
-//
-// The function always returns nil.
-func (b *ByteBuffer) WriteByte(c byte) error {
-	b.B = append(b.B, c)
-	return nil
-}
-
-// WriteString appends s to ByteBuffer.B.
-func (b *ByteBuffer) WriteString(s string) (int, error) {
-	b.B = append(b.B, s...)
-	return len(s), nil
-}
-
-// Set sets ByteBuffer.B to p.
-func (b *ByteBuffer) Set(p []byte) {
-	b.B = append(b.B[:0], p...)
-}
-
-// SetString sets ByteBuffer.B to s.
-func (b *ByteBuffer) SetString(s string) {
-	b.B = append(b.B[:0], s...)
-}
-
-// String returns string representation of ByteBuffer.B.
-func (b *ByteBuffer) String() string {
-	return string(b.B)
-}
-
-// Reset makes ByteBuffer.B empty.
-func (b *ByteBuffer) Reset() {
-	b.B = b.B[:0]
-}

vendor/github.com/valyala/bytebufferpool/doc.go

@@ -1,7 +0,0 @@
-// Package bytebufferpool implements a pool of byte buffers
-// with anti-fragmentation protection.
-//
-// The pool may waste limited amount of memory due to fragmentation.
-// This amount equals to the maximum total size of the byte buffers
-// in concurrent use.
-package bytebufferpool

vendor/github.com/valyala/bytebufferpool/pool.go

@@ -1,151 +0,0 @@
-package bytebufferpool
-
-import (
-	"sort"
-	"sync"
-	"sync/atomic"
-)
-
-const (
-	minBitSize = 6 // 2**6=64 is a CPU cache line size
-	steps      = 20
-
-	minSize = 1 << minBitSize
-	maxSize = 1 << (minBitSize + steps - 1)
-
-	calibrateCallsThreshold = 42000
-	maxPercentile           = 0.95
-)
-
-// Pool represents byte buffer pool.
-//
-// Distinct pools may be used for distinct types of byte buffers.
-// Properly determined byte buffer types with their own pools may help reducing
-// memory waste.
-type Pool struct {
-	calls       [steps]uint64
-	calibrating uint64
-
-	defaultSize uint64
-	maxSize     uint64
-
-	pool sync.Pool
-}
-
-var defaultPool Pool
-
-// Get returns an empty byte buffer from the pool.
-//
-// Got byte buffer may be returned to the pool via Put call.
-// This reduces the number of memory allocations required for byte buffer
-// management.
-func Get() *ByteBuffer { return defaultPool.Get() }
-
-// Get returns new byte buffer with zero length.
-//
-// The byte buffer may be returned to the pool via Put after the use
-// in order to minimize GC overhead.
-func (p *Pool) Get() *ByteBuffer {
-	v := p.pool.Get()
-	if v != nil {
-		return v.(*ByteBuffer)
-	}
-	return &ByteBuffer{
-		B: make([]byte, 0, atomic.LoadUint64(&p.defaultSize)),
-	}
-}
-
-// Put returns byte buffer to the pool.
-//
-// ByteBuffer.B mustn't be touched after returning it to the pool.
-// Otherwise data races will occur.
-func Put(b *ByteBuffer) { defaultPool.Put(b) }
-
-// Put releases byte buffer obtained via Get to the pool.
-//
-// The buffer mustn't be accessed after returning to the pool.
-func (p *Pool) Put(b *ByteBuffer) {
-	idx := index(len(b.B))
-
-	if atomic.AddUint64(&p.calls[idx], 1) > calibrateCallsThreshold {
-		p.calibrate()
-	}
-
-	maxSize := int(atomic.LoadUint64(&p.maxSize))
-	if maxSize == 0 || cap(b.B) <= maxSize {
-		b.Reset()
-		p.pool.Put(b)
-	}
-}
-
-func (p *Pool) calibrate() {
-	if !atomic.CompareAndSwapUint64(&p.calibrating, 0, 1) {
-		return
-	}
-
-	a := make(callSizes, 0, steps)
-	var callsSum uint64
-	for i := uint64(0); i < steps; i++ {
-		calls := atomic.SwapUint64(&p.calls[i], 0)
-		callsSum += calls
-		a = append(a, callSize{
-			calls: calls,
-			size:  minSize << i,
-		})
-	}
-	sort.Sort(a)
-
-	defaultSize := a[0].size
-	maxSize := defaultSize
-
-	maxSum := uint64(float64(callsSum) * maxPercentile)
-	callsSum = 0
-	for i := 0; i < steps; i++ {
-		if callsSum > maxSum {
-			break
-		}
-		callsSum += a[i].calls
-		size := a[i].size
-		if size > maxSize {
-			maxSize = size
-		}
-	}
-
-	atomic.StoreUint64(&p.defaultSize, defaultSize)
-	atomic.StoreUint64(&p.maxSize, maxSize)
-
-	atomic.StoreUint64(&p.calibrating, 0)
-}
-
-type callSize struct {
-	calls uint64
-	size  uint64
-}
-
-type callSizes []callSize
-
-func (ci callSizes) Len() int {
-	return len(ci)
-}
-
-func (ci callSizes) Less(i, j int) bool {
-	return ci[i].calls > ci[j].calls
-}
-
-func (ci callSizes) Swap(i, j int) {
-	ci[i], ci[j] = ci[j], ci[i]
-}
-
-func index(n int) int {
-	n--
-	n >>= minBitSize
-	idx := 0
-	for n > 0 {
-		n >>= 1
-		idx++
-	}
-	if idx >= steps {
-		idx = steps - 1
-	}
-	return idx
-}

vendor/github.com/valyala/fasthttp/LICENSE

@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2015-2016 Aliaksandr Valialkin, VertaMedia
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-

vendor/github.com/valyala/fasthttp/README.md

@@ -1,579 +0,0 @@
-[![Build Status](https://travis-ci.org/valyala/fasthttp.svg)](https://travis-ci.org/valyala/fasthttp)
-[![GoDoc](https://godoc.org/github.com/valyala/fasthttp?status.svg)](http://godoc.org/github.com/valyala/fasthttp)
-[![Go Report](https://goreportcard.com/badge/github.com/valyala/fasthttp)](https://goreportcard.com/report/github.com/valyala/fasthttp)
-
-# fasthttp
-Fast HTTP implementation for Go.
-
-Currently fasthttp is successfully used by [VertaMedia](https://vertamedia.com/)
-in a production serving up to 200K rps from more than 1.5M concurrent keep-alive
-connections per physical server.
-
-[TechEmpower Benchmark round 12 results](https://www.techempower.com/benchmarks/#section=data-r12&hw=peak&test=plaintext)
-
-[Server Benchmarks](#http-server-performance-comparison-with-nethttp)
-
-[Client Benchmarks](#http-client-comparison-with-nethttp)
-
-[Install](#install)
-
-[Documentation](https://godoc.org/github.com/valyala/fasthttp)
-
-[Examples from docs](https://godoc.org/github.com/valyala/fasthttp#pkg-examples)
-
-[Code examples](examples)
-
-[Switching from net/http to fasthttp](#switching-from-nethttp-to-fasthttp)
-
-[Fasthttp best practices](#fasthttp-best-practices)
-
-[Tricks with byte buffers](#tricks-with-byte-buffers)
-
-[Related projects](#related-projects)
-
-[FAQ](#faq)
-
-# HTTP server performance comparison with [net/http](https://golang.org/pkg/net/http/)
-
-In short, fasthttp server is up to 10 times faster than net/http.
-Below are benchmark results.
-
-*GOMAXPROCS=1*
-
-net/http server:
-```
-$ GOMAXPROCS=1 go test -bench=NetHTTPServerGet -benchmem -benchtime=10s
-BenchmarkNetHTTPServerGet1ReqPerConn                	 1000000	     12052 ns/op	    2297 B/op	      29 allocs/op
-BenchmarkNetHTTPServerGet2ReqPerConn                	 1000000	     12278 ns/op	    2327 B/op	      24 allocs/op
-BenchmarkNetHTTPServerGet10ReqPerConn               	 2000000	      8903 ns/op	    2112 B/op	      19 allocs/op
-BenchmarkNetHTTPServerGet10KReqPerConn              	 2000000	      8451 ns/op	    2058 B/op	      18 allocs/op
-BenchmarkNetHTTPServerGet1ReqPerConn10KClients      	  500000	     26733 ns/op	    3229 B/op	      29 allocs/op
-BenchmarkNetHTTPServerGet2ReqPerConn10KClients      	 1000000	     23351 ns/op	    3211 B/op	      24 allocs/op
-BenchmarkNetHTTPServerGet10ReqPerConn10KClients     	 1000000	     13390 ns/op	    2483 B/op	      19 allocs/op
-BenchmarkNetHTTPServerGet100ReqPerConn10KClients    	 1000000	     13484 ns/op	    2171 B/op	      18 allocs/op
-```
-
-fasthttp server:
-```
-$ GOMAXPROCS=1 go test -bench=kServerGet -benchmem -benchtime=10s
-BenchmarkServerGet1ReqPerConn                       	10000000	      1559 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet2ReqPerConn                       	10000000	      1248 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10ReqPerConn                      	20000000	       797 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10KReqPerConn                     	20000000	       716 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet1ReqPerConn10KClients             	10000000	      1974 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet2ReqPerConn10KClients             	10000000	      1352 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10ReqPerConn10KClients            	20000000	       789 ns/op	       2 B/op	       0 allocs/op
-BenchmarkServerGet100ReqPerConn10KClients           	20000000	       604 ns/op	       0 B/op	       0 allocs/op
-```
-
-*GOMAXPROCS=4*
-
-net/http server:
-```
-$ GOMAXPROCS=4 go test -bench=NetHTTPServerGet -benchmem -benchtime=10s
-BenchmarkNetHTTPServerGet1ReqPerConn-4                  	 3000000	      4529 ns/op	    2389 B/op	      29 allocs/op
-BenchmarkNetHTTPServerGet2ReqPerConn-4                  	 5000000	      3896 ns/op	    2418 B/op	      24 allocs/op
-BenchmarkNetHTTPServerGet10ReqPerConn-4                 	 5000000	      3145 ns/op	    2160 B/op	      19 allocs/op
-BenchmarkNetHTTPServerGet10KReqPerConn-4                	 5000000	      3054 ns/op	    2065 B/op	      18 allocs/op
-BenchmarkNetHTTPServerGet1ReqPerConn10KClients-4        	 1000000	     10321 ns/op	    3710 B/op	      30 allocs/op
-BenchmarkNetHTTPServerGet2ReqPerConn10KClients-4        	 2000000	      7556 ns/op	    3296 B/op	      24 allocs/op
-BenchmarkNetHTTPServerGet10ReqPerConn10KClients-4       	 5000000	      3905 ns/op	    2349 B/op	      19 allocs/op
-BenchmarkNetHTTPServerGet100ReqPerConn10KClients-4      	 5000000	      3435 ns/op	    2130 B/op	      18 allocs/op
-```
-
-fasthttp server:
-```
-$ GOMAXPROCS=4 go test -bench=kServerGet -benchmem -benchtime=10s
-BenchmarkServerGet1ReqPerConn-4                         	10000000	      1141 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet2ReqPerConn-4                         	20000000	       707 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10ReqPerConn-4                        	30000000	       341 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10KReqPerConn-4                       	50000000	       310 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet1ReqPerConn10KClients-4               	10000000	      1119 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet2ReqPerConn10KClients-4               	20000000	       644 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet10ReqPerConn10KClients-4              	30000000	       346 ns/op	       0 B/op	       0 allocs/op
-BenchmarkServerGet100ReqPerConn10KClients-4             	50000000	       282 ns/op	       0 B/op	       0 allocs/op
-```
-
-# HTTP client comparison with net/http
-
-In short, fasthttp client is up to 10 times faster than net/http.
-Below are benchmark results.
-
-*GOMAXPROCS=1*
-
-net/http client:
-```
-$ GOMAXPROCS=1 go test -bench='HTTPClient(Do|GetEndToEnd)' -benchmem -benchtime=10s
-BenchmarkNetHTTPClientDoFastServer                  	 1000000	     12567 ns/op	    2616 B/op	      35 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1TCP               	  200000	     67030 ns/op	    5028 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd10TCP              	  300000	     51098 ns/op	    5031 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd100TCP             	  300000	     45096 ns/op	    5026 B/op	      55 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1Inmemory          	  500000	     24779 ns/op	    5035 B/op	      57 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd10Inmemory         	 1000000	     26425 ns/op	    5035 B/op	      57 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd100Inmemory        	  500000	     28515 ns/op	    5045 B/op	      57 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1000Inmemory       	  500000	     39511 ns/op	    5096 B/op	      56 allocs/op
-```
-
-fasthttp client:
-```
-$ GOMAXPROCS=1 go test -bench='kClient(Do|GetEndToEnd)' -benchmem -benchtime=10s
-BenchmarkClientDoFastServer                         	20000000	       865 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1TCP                      	 1000000	     18711 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd10TCP                     	 1000000	     14664 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd100TCP                    	 1000000	     14043 ns/op	       1 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1Inmemory                 	 5000000	      3965 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd10Inmemory                	 3000000	      4060 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd100Inmemory               	 5000000	      3396 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1000Inmemory              	 5000000	      3306 ns/op	       2 B/op	       0 allocs/op
-```
-
-*GOMAXPROCS=4*
-
-net/http client:
-```
-$ GOMAXPROCS=4 go test -bench='HTTPClient(Do|GetEndToEnd)' -benchmem -benchtime=10s
-BenchmarkNetHTTPClientDoFastServer-4                    	 2000000	      8774 ns/op	    2619 B/op	      35 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1TCP-4                 	  500000	     22951 ns/op	    5047 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd10TCP-4                	 1000000	     19182 ns/op	    5037 B/op	      55 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd100TCP-4               	 1000000	     16535 ns/op	    5031 B/op	      55 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1Inmemory-4            	 1000000	     14495 ns/op	    5038 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd10Inmemory-4           	 1000000	     10237 ns/op	    5034 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd100Inmemory-4          	 1000000	     10125 ns/op	    5045 B/op	      56 allocs/op
-BenchmarkNetHTTPClientGetEndToEnd1000Inmemory-4         	 1000000	     11132 ns/op	    5136 B/op	      56 allocs/op
-```
-
-fasthttp client:
-```
-$ GOMAXPROCS=4 go test -bench='kClient(Do|GetEndToEnd)' -benchmem -benchtime=10s
-BenchmarkClientDoFastServer-4                           	50000000	       397 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1TCP-4                        	 2000000	      7388 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd10TCP-4                       	 2000000	      6689 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd100TCP-4                      	 3000000	      4927 ns/op	       1 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1Inmemory-4                   	10000000	      1604 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd10Inmemory-4                  	10000000	      1458 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd100Inmemory-4                 	10000000	      1329 ns/op	       0 B/op	       0 allocs/op
-BenchmarkClientGetEndToEnd1000Inmemory-4                	10000000	      1316 ns/op	       5 B/op	       0 allocs/op
-```
-
-
-# Install
-
-```
-go get -u github.com/valyala/fasthttp
-```
-
-
-# Switching from net/http to fasthttp
-
-Unfortunately, fasthttp doesn't provide API identical to net/http.
-See the [FAQ](#faq) for details.
-There is [net/http -> fasthttp handler converter](https://godoc.org/github.com/valyala/fasthttp/fasthttpadaptor),
-but it is better to write fasthttp request handlers by hand in order to use 
-all of the fasthttp advantages (especially high performance :) ).
-
-Important points:
-
-* Fasthttp works with [RequestHandler functions](https://godoc.org/github.com/valyala/fasthttp#RequestHandler)
-instead of objects implementing [Handler interface](https://golang.org/pkg/net/http/#Handler).
-Fortunately, it is easy to pass bound struct methods to fasthttp:
-
-  ```go
-  type MyHandler struct {
-  	foobar string
-  }
-
-  // request handler in net/http style, i.e. method bound to MyHandler struct.
-  func (h *MyHandler) HandleFastHTTP(ctx *fasthttp.RequestCtx) {
-  	// notice that we may access MyHandler properties here - see h.foobar.
-  	fmt.Fprintf(ctx, "Hello, world! Requested path is %q. Foobar is %q",
-  		ctx.Path(), h.foobar)
-  }
-
-  // request handler in fasthttp style, i.e. just plain function.
-  func fastHTTPHandler(ctx *fasthttp.RequestCtx) {
-  	fmt.Fprintf(ctx, "Hi there! RequestURI is %q", ctx.RequestURI())
-  }
-
-  // pass bound struct method to fasthttp
-  myHandler := &MyHandler{
-  	foobar: "foobar",
-  }
-  fasthttp.ListenAndServe(":8080", myHandler.HandleFastHTTP)
-
-  // pass plain function to fasthttp
-  fasthttp.ListenAndServe(":8081", fastHTTPHandler)
-  ```
-
-* The [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler)
-accepts only one argument - [RequestCtx](https://godoc.org/github.com/valyala/fasthttp#RequestCtx).
-It contains all the functionality required for http request processing
-and response writing. Below is an example of a simple request handler conversion
-from net/http to fasthttp.
-
-  ```go
-  // net/http request handler
-  requestHandler := func(w http.ResponseWriter, r *http.Request) {
-  	switch r.URL.Path {
-  	case "/foo":
-  		fooHandler(w, r)
-  	case "/bar":
-  		barHandler(w, r)
-  	default:
-  		http.Error(w, "Unsupported path", http.StatusNotFound)
-  	}
-  }
-  ```
-
-  ```go
-  // the corresponding fasthttp request handler
-  requestHandler := func(ctx *fasthttp.RequestCtx) {
-  	switch string(ctx.Path()) {
-  	case "/foo":
-  		fooHandler(ctx)
-  	case "/bar":
-  		barHandler(ctx)
-  	default:
-  		ctx.Error("Unsupported path", fasthttp.StatusNotFound)
-  	}
-  }
-  ```
-
-* Fasthttp allows setting response headers and writing response body
-in an arbitrary order. There is no 'headers first, then body' restriction
-like in net/http. The following code is valid for fasthttp:
-
-  ```go
-  requestHandler := func(ctx *fasthttp.RequestCtx) {
-  	// set some headers and status code first
-  	ctx.SetContentType("foo/bar")
-  	ctx.SetStatusCode(fasthttp.StatusOK)
-
-  	// then write the first part of body
-  	fmt.Fprintf(ctx, "this is the first part of body\n")
-
-  	// then set more headers
-  	ctx.Response.Header.Set("Foo-Bar", "baz")
-
-  	// then write more body
-  	fmt.Fprintf(ctx, "this is the second part of body\n")
-
-  	// then override already written body
-  	ctx.SetBody([]byte("this is completely new body contents"))
-
-  	// then update status code
-  	ctx.SetStatusCode(fasthttp.StatusNotFound)
-
-  	// basically, anything may be updated many times before
-  	// returning from RequestHandler.
-  	//
-  	// Unlike net/http fasthttp doesn't put response to the wire until
-  	// returning from RequestHandler.
-  }
-  ```
-
-* Fasthttp doesn't provide [ServeMux](https://golang.org/pkg/net/http/#ServeMux),
-but there are more powerful third-party routers and web frameworks
-with fasthttp support:
-
-  * [Iris](https://github.com/kataras/iris)
-  * [fasthttp-routing](https://github.com/qiangxue/fasthttp-routing)
-  * [fasthttprouter](https://github.com/buaazp/fasthttprouter)
-  * [lu](https://github.com/vincentLiuxiang/lu)
-
-  Net/http code with simple ServeMux is trivially converted to fasthttp code:
-
-  ```go
-  // net/http code
-
-  m := &http.ServeMux{}
-  m.HandleFunc("/foo", fooHandlerFunc)
-  m.HandleFunc("/bar", barHandlerFunc)
-  m.Handle("/baz", bazHandler)
-
-  http.ListenAndServe(":80", m)
-  ```
-
-  ```go
-  // the corresponding fasthttp code
-  m := func(ctx *fasthttp.RequestCtx) {
-  	switch string(ctx.Path()) {
-  	case "/foo":
-  		fooHandlerFunc(ctx)
-  	case "/bar":
-  		barHandlerFunc(ctx)
-  	case "/baz":
-  		bazHandler.HandlerFunc(ctx)
-  	default:
-  		ctx.Error("not found", fasthttp.StatusNotFound)
-  	}
-  }
-
-  fasthttp.ListenAndServe(":80", m)
-  ```
-
-* net/http -> fasthttp conversion table:
-
-  * All the pseudocode below assumes w, r and ctx have these types:
-  ```go
-	var (
-		w http.ResponseWriter
-		r *http.Request
-		ctx *fasthttp.RequestCtx
-	)
-  ```
-  * r.Body -> [ctx.PostBody()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.PostBody)
-  * r.URL.Path -> [ctx.Path()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Path)
-  * r.URL -> [ctx.URI()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.URI)
-  * r.Method -> [ctx.Method()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Method)
-  * r.Header -> [ctx.Request.Header](https://godoc.org/github.com/valyala/fasthttp#RequestHeader)
-  * r.Header.Get() -> [ctx.Request.Header.Peek()](https://godoc.org/github.com/valyala/fasthttp#RequestHeader.Peek)
-  * r.Host -> [ctx.Host()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Host)
-  * r.Form -> [ctx.QueryArgs()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.QueryArgs) +
-  [ctx.PostArgs()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.PostArgs)
-  * r.PostForm -> [ctx.PostArgs()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.PostArgs)
-  * r.FormValue() -> [ctx.FormValue()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.FormValue)
-  * r.FormFile() -> [ctx.FormFile()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.FormFile)
-  * r.MultipartForm -> [ctx.MultipartForm()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.MultipartForm)
-  * r.RemoteAddr -> [ctx.RemoteAddr()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.RemoteAddr)
-  * r.RequestURI -> [ctx.RequestURI()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.RequestURI)
-  * r.TLS -> [ctx.IsTLS()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.IsTLS)
-  * r.Cookie() -> [ctx.Request.Header.Cookie()](https://godoc.org/github.com/valyala/fasthttp#RequestHeader.Cookie)
-  * r.Referer() -> [ctx.Referer()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Referer)
-  * r.UserAgent() -> [ctx.UserAgent()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.UserAgent)
-  * w.Header() -> [ctx.Response.Header](https://godoc.org/github.com/valyala/fasthttp#ResponseHeader)
-  * w.Header().Set() -> [ctx.Response.Header.Set()](https://godoc.org/github.com/valyala/fasthttp#ResponseHeader.Set)
-  * w.Header().Set("Content-Type") -> [ctx.SetContentType()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.SetContentType)
-  * w.Header().Set("Set-Cookie") -> [ctx.Response.Header.SetCookie()](https://godoc.org/github.com/valyala/fasthttp#ResponseHeader.SetCookie)
-  * w.Write() -> [ctx.Write()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Write),
-  [ctx.SetBody()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.SetBody),
-  [ctx.SetBodyStream()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.SetBodyStream),
-  [ctx.SetBodyStreamWriter()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.SetBodyStreamWriter)
-  * w.WriteHeader() -> [ctx.SetStatusCode()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.SetStatusCode)
-  * w.(http.Hijacker).Hijack() -> [ctx.Hijack()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Hijack)
-  * http.Error() -> [ctx.Error()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Error)
-  * http.FileServer() -> [fasthttp.FSHandler()](https://godoc.org/github.com/valyala/fasthttp#FSHandler),
-  [fasthttp.FS](https://godoc.org/github.com/valyala/fasthttp#FS)
-  * http.ServeFile() -> [fasthttp.ServeFile()](https://godoc.org/github.com/valyala/fasthttp#ServeFile)
-  * http.Redirect() -> [ctx.Redirect()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Redirect)
-  * http.NotFound() -> [ctx.NotFound()](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.NotFound)
-  * http.StripPrefix() -> [fasthttp.PathRewriteFunc](https://godoc.org/github.com/valyala/fasthttp#PathRewriteFunc)
-
-* *VERY IMPORTANT!* Fasthttp disallows holding references
-to [RequestCtx](https://godoc.org/github.com/valyala/fasthttp#RequestCtx) or to its'
-members after returning from [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler).
-Otherwise [data races](http://blog.golang.org/race-detector) are inevitable.
-Carefully inspect all the net/http request handlers converted to fasthttp whether
-they retain references to RequestCtx or to its' members after returning.
-RequestCtx provides the following _band aids_ for this case:
-
-  * Wrap RequestHandler into [TimeoutHandler](https://godoc.org/github.com/valyala/fasthttp#TimeoutHandler).
-  * Call [TimeoutError](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.TimeoutError)
-  before returning from RequestHandler if there are references to RequestCtx or to its' members.
-  See [the example](https://godoc.org/github.com/valyala/fasthttp#example-RequestCtx-TimeoutError)
-  for more details.
-
-Use this brilliant tool - [race detector](http://blog.golang.org/race-detector) -
-for detecting and eliminating data races in your program. If you detected
-data race related to fasthttp in your program, then there is high probability
-you forgot calling [TimeoutError](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.TimeoutError)
-before returning from [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler).
-
-* Blind switching from net/http to fasthttp won't give you performance boost.
-While fasthttp is optimized for speed, its' performance may be easily saturated
-by slow [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler).
-So [profile](http://blog.golang.org/profiling-go-programs) and optimize your
-code after switching to fasthttp. For instance, use [quicktemplate](https://github.com/valyala/quicktemplate)
-instead of [html/template](https://golang.org/pkg/html/template/).
-
-* See also [fasthttputil](https://godoc.org/github.com/valyala/fasthttp/fasthttputil),
-[fasthttpadaptor](https://godoc.org/github.com/valyala/fasthttp/fasthttpadaptor) and
-[expvarhandler](https://godoc.org/github.com/valyala/fasthttp/expvarhandler).
-
-
-# Performance optimization tips for multi-core systems
-
-* Use [reuseport](https://godoc.org/github.com/valyala/fasthttp/reuseport) listener.
-* Run a separate server instance per CPU core with GOMAXPROCS=1.
-* Pin each server instance to a separate CPU core using [taskset](http://linux.die.net/man/1/taskset).
-* Ensure the interrupts of multiqueue network card are evenly distributed between CPU cores.
-  See [this article](https://blog.cloudflare.com/how-to-achieve-low-latency/) for details.
-* Use Go 1.6 as it provides some considerable performance improvements.
-
-
-# Fasthttp best practices
-
-* Do not allocate objects and `[]byte` buffers - just reuse them as much
-  as possible. Fasthttp API design encourages this.
-* [sync.Pool](https://golang.org/pkg/sync/#Pool) is your best friend.
-* [Profile your program](http://blog.golang.org/profiling-go-programs)
-  in production.
-  `go tool pprof --alloc_objects your-program mem.pprof` usually gives better
-  insights for optimization opportunities than `go tool pprof your-program cpu.pprof`.
-* Write [tests and benchmarks](https://golang.org/pkg/testing/) for hot paths.
-* Avoid conversion between `[]byte` and `string`, since this may result in memory
-  allocation+copy. Fasthttp API provides functions for both `[]byte` and `string` -
-  use these functions instead of converting manually between `[]byte` and `string`.
-  There are some exceptions - see [this wiki page](https://github.com/golang/go/wiki/CompilerOptimizations#string-and-byte)
-  for more details.
-* Verify your tests and production code under
-  [race detector](https://golang.org/doc/articles/race_detector.html) on a regular basis.
-* Prefer [quicktemplate](https://github.com/valyala/quicktemplate) instead of
-  [html/template](https://golang.org/pkg/html/template/) in your webserver.
-
-
-# Tricks with `[]byte` buffers
-
-The following tricks are used by fasthttp. Use them in your code too.
-
-* Standard Go functions accept nil buffers
-```go
-var (
-	// both buffers are uninitialized
-	dst []byte
-	src []byte
-)
-dst = append(dst, src...)  // is legal if dst is nil and/or src is nil
-copy(dst, src)  // is legal if dst is nil and/or src is nil
-(string(src) == "")  // is true if src is nil
-(len(src) == 0)  // is true if src is nil
-src = src[:0]  // works like a charm with nil src
-
-// this for loop doesn't panic if src is nil
-for i, ch := range src {
-	doSomething(i, ch)
-}
-```
-
-So throw away nil checks for `[]byte` buffers from you code. For example,
-```go
-srcLen := 0
-if src != nil {
-	srcLen = len(src)
-}
-```
-
-becomes
-
-```go
-srcLen := len(src)
-```
-
-* String may be appended to `[]byte` buffer with `append`
-```go
-dst = append(dst, "foobar"...)
-```
-
-* `[]byte` buffer may be extended to its' capacity.
-```go
-buf := make([]byte, 100)
-a := buf[:10]  // len(a) == 10, cap(a) == 100.
-b := a[:100]  // is valid, since cap(a) == 100.
-```
-
-* All fasthttp functions accept nil `[]byte` buffer
-```go
-statusCode, body, err := fasthttp.Get(nil, "http://google.com/")
-uintBuf := fasthttp.AppendUint(nil, 1234)
-```
-
-# Related projects
-
-  * [fasthttp-contrib](https://github.com/fasthttp-contrib) - various useful
-    helpers for projects based on fasthttp.
-  * [iris](https://github.com/kataras/iris) - web application framework built
-    on top of fasthttp. Features speed and functionality.
-  * [fasthttp-routing](https://github.com/qiangxue/fasthttp-routing) - fast and
-    powerful routing package for fasthttp servers.
-  * [fasthttprouter](https://github.com/buaazp/fasthttprouter) - a high
-    performance fasthttp request router that scales well.
-  * [lu](https://github.com/vincentLiuxiang/lu) - a high performance
-    go middleware web framework which is based on fasthttp.
-  * [websocket](https://github.com/leavengood/websocket) - Gorilla-based
-    websocket implementation for fasthttp.
-
-
-# FAQ
-
-* *Why creating yet another http package instead of optimizing net/http?*
-
-  Because net/http API limits many optimization opportunities.
-  For example:
-  * net/http Request object lifetime isn't limited by request handler execution
-    time. So the server must create a new request object per each request instead
-    of reusing existing objects like fasthttp does.
-  * net/http headers are stored in a `map[string][]string`. So the server
-    must parse all the headers, convert them from `[]byte` to `string` and put
-    them into the map before calling user-provided request handler.
-    This all requires unnecessary memory allocations avoided by fasthttp.
-  * net/http client API requires creating a new response object per each request.
-
-* *Why fasthttp API is incompatible with net/http?*
-
-  Because net/http API limits many optimization opportunities. See the answer
-  above for more details. Also certain net/http API parts are suboptimal
-  for use:
-  * Compare [net/http connection hijacking](https://golang.org/pkg/net/http/#Hijacker)
-    to [fasthttp connection hijacking](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Hijack).
-  * Compare [net/http Request.Body reading](https://golang.org/pkg/net/http/#Request)
-    to [fasthttp request body reading](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.PostBody).
-
-* *Why fasthttp doesn't support HTTP/2.0 and WebSockets?*
-
-  There are [plans](TODO) for adding HTTP/2.0 and WebSockets support
-  in the future.
-  In the mean time, third parties may use [RequestCtx.Hijack](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.Hijack)
-  for implementing these goodies. See [the first third-party websocket implementation on the top of fasthttp](https://github.com/leavengood/websocket).
-
-* *Are there known net/http advantages comparing to fasthttp?*
-
-  Yes:
-  * net/http supports [HTTP/2.0 starting from go1.6](https://http2.golang.org/).
-  * net/http API is stable, while fasthttp API constantly evolves.
-  * net/http handles more HTTP corner cases.
-  * net/http should contain less bugs, since it is used and tested by much
-    wider audience.
-  * net/http works on Go older than 1.5.
-
-* *Why fasthttp API prefers returning `[]byte` instead of `string`?*
-
-  Because `[]byte` to `string` conversion isn't free - it requires memory
-  allocation and copy. Feel free wrapping returned `[]byte` result into
-  `string()` if you prefer working with strings instead of byte slices.
-  But be aware that this has non-zero overhead.
-
-* *Which GO versions are supported by fasthttp?*
-
-  Go1.5+. Older versions won't be supported, since their standard package
-  [miss useful functions](https://github.com/valyala/fasthttp/issues/5).
-
-* *Please provide real benchmark data and sever information*
-
-  See [this issue](https://github.com/valyala/fasthttp/issues/4).
-
-* *Are there plans to add request routing to fasthttp?*
-
-  There are no plans to add request routing into fasthttp.
-  Use third-party routers and web frameworks with fasthttp support:
-
-    * [Iris](https://github.com/kataras/iris)
-    * [fasthttp-routing](https://github.com/qiangxue/fasthttp-routing)
-    * [fasthttprouter](https://github.com/buaazp/fasthttprouter)
-    * [lu](https://github.com/vincentLiuxiang/lu)
-
-  See also [this issue](https://github.com/valyala/fasthttp/issues/9) for more info.
-
-* *I detected data race in fasthttp!*
-
-  Cool! [File a bug](https://github.com/valyala/fasthttp/issues/new). But before
-  doing this check the following in your code:
-
-  * Make sure there are no references to [RequestCtx](https://godoc.org/github.com/valyala/fasthttp#RequestCtx)
-  or to its' members after returning from [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler).
-  * Make sure you call [TimeoutError](https://godoc.org/github.com/valyala/fasthttp#RequestCtx.TimeoutError)
-  before returning from [RequestHandler](https://godoc.org/github.com/valyala/fasthttp#RequestHandler)
-  if there are references to [RequestCtx](https://godoc.org/github.com/valyala/fasthttp#RequestCtx)
-  or to its' members, which may be accessed by other goroutines.
-
-* *I didn't find an answer for my question here*
-
-  Try exploring [these questions](https://github.com/valyala/fasthttp/issues?q=label%3Aquestion).

vendor/github.com/valyala/fasthttp/TODO

@@ -1,4 +0,0 @@
-- SessionClient with referer and cookies support.
-- ProxyHandler similar to FSHandler.
-- WebSockets. See https://tools.ietf.org/html/rfc6455 .
-- HTTP/2.0. See https://tools.ietf.org/html/rfc7540 .

vendor/github.com/valyala/fasthttp/args.go

@@ -1,482 +0,0 @@
-package fasthttp
-
-import (
-	"bytes"
-	"errors"
-	"io"
-	"sync"
-)
-
-// AcquireArgs returns an empty Args object from the pool.
-//
-// The returned Args may be returned to the pool with ReleaseArgs
-// when no longer needed. This allows reducing GC load.
-func AcquireArgs() *Args {
-	return argsPool.Get().(*Args)
-}
-
-// ReleaseArgs returns the object acquired via AquireArgs to the pool.
-//
-// Do not access the released Args object, otherwise data races may occur.
-func ReleaseArgs(a *Args) {
-	a.Reset()
-	argsPool.Put(a)
-}
-
-var argsPool = &sync.Pool{
-	New: func() interface{} {
-		return &Args{}
-	},
-}
-
-// Args represents query arguments.
-//
-// It is forbidden copying Args instances. Create new instances instead
-// and use CopyTo().
-//
-// Args instance MUST NOT be used from concurrently running goroutines.
-type Args struct {
-	noCopy noCopy
-
-	args []argsKV
-	buf  []byte
-}
-
-type argsKV struct {
-	key   []byte
-	value []byte
-}
-
-// Reset clears query args.
-func (a *Args) Reset() {
-	a.args = a.args[:0]
-}
-
-// CopyTo copies all args to dst.
-func (a *Args) CopyTo(dst *Args) {
-	dst.Reset()
-	dst.args = copyArgs(dst.args, a.args)
-}
-
-// VisitAll calls f for each existing arg.
-//
-// f must not retain references to key and value after returning.
-// Make key and/or value copies if you need storing them after returning.
-func (a *Args) VisitAll(f func(key, value []byte)) {
-	visitArgs(a.args, f)
-}
-
-// Len returns the number of query args.
-func (a *Args) Len() int {
-	return len(a.args)
-}
-
-// Parse parses the given string containing query args.
-func (a *Args) Parse(s string) {
-	a.buf = append(a.buf[:0], s...)
-	a.ParseBytes(a.buf)
-}
-
-// ParseBytes parses the given b containing query args.
-func (a *Args) ParseBytes(b []byte) {
-	a.Reset()
-
-	var s argsScanner
-	s.b = b
-
-	var kv *argsKV
-	a.args, kv = allocArg(a.args)
-	for s.next(kv) {
-		if len(kv.key) > 0 || len(kv.value) > 0 {
-			a.args, kv = allocArg(a.args)
-		}
-	}
-	a.args = releaseArg(a.args)
-}
-
-// String returns string representation of query args.
-func (a *Args) String() string {
-	return string(a.QueryString())
-}
-
-// QueryString returns query string for the args.
-//
-// The returned value is valid until the next call to Args methods.
-func (a *Args) QueryString() []byte {
-	a.buf = a.AppendBytes(a.buf[:0])
-	return a.buf
-}
-
-// AppendBytes appends query string to dst and returns the extended dst.
-func (a *Args) AppendBytes(dst []byte) []byte {
-	for i, n := 0, len(a.args); i < n; i++ {
-		kv := &a.args[i]
-		dst = AppendQuotedArg(dst, kv.key)
-		if len(kv.value) > 0 {
-			dst = append(dst, '=')
-			dst = AppendQuotedArg(dst, kv.value)
-		}
-		if i+1 < n {
-			dst = append(dst, '&')
-		}
-	}
-	return dst
-}
-
-// WriteTo writes query string to w.
-//
-// WriteTo implements io.WriterTo interface.
-func (a *Args) WriteTo(w io.Writer) (int64, error) {
-	n, err := w.Write(a.QueryString())
-	return int64(n), err
-}
-
-// Del deletes argument with the given key from query args.
-func (a *Args) Del(key string) {
-	a.args = delAllArgs(a.args, key)
-}
-
-// DelBytes deletes argument with the given key from query args.
-func (a *Args) DelBytes(key []byte) {
-	a.args = delAllArgs(a.args, b2s(key))
-}
-
-// Add adds 'key=value' argument.
-//
-// Multiple values for the same key may be added.
-func (a *Args) Add(key, value string) {
-	a.args = appendArg(a.args, key, value)
-}
-
-// AddBytesK adds 'key=value' argument.
-//
-// Multiple values for the same key may be added.
-func (a *Args) AddBytesK(key []byte, value string) {
-	a.args = appendArg(a.args, b2s(key), value)
-}
-
-// AddBytesV adds 'key=value' argument.
-//
-// Multiple values for the same key may be added.
-func (a *Args) AddBytesV(key string, value []byte) {
-	a.args = appendArg(a.args, key, b2s(value))
-}
-
-// AddBytesKV adds 'key=value' argument.
-//
-// Multiple values for the same key may be added.
-func (a *Args) AddBytesKV(key, value []byte) {
-	a.args = appendArg(a.args, b2s(key), b2s(value))
-}
-
-// Set sets 'key=value' argument.
-func (a *Args) Set(key, value string) {
-	a.args = setArg(a.args, key, value)
-}
-
-// SetBytesK sets 'key=value' argument.
-func (a *Args) SetBytesK(key []byte, value string) {
-	a.args = setArg(a.args, b2s(key), value)
-}
-
-// SetBytesV sets 'key=value' argument.
-func (a *Args) SetBytesV(key string, value []byte) {
-	a.args = setArg(a.args, key, b2s(value))
-}
-
-// SetBytesKV sets 'key=value' argument.
-func (a *Args) SetBytesKV(key, value []byte) {
-	a.args = setArgBytes(a.args, key, value)
-}
-
-// Peek returns query arg value for the given key.
-//
-// Returned value is valid until the next Args call.
-func (a *Args) Peek(key string) []byte {
-	return peekArgStr(a.args, key)
-}
-
-// PeekBytes returns query arg value for the given key.
-//
-// Returned value is valid until the next Args call.
-func (a *Args) PeekBytes(key []byte) []byte {
-	return peekArgBytes(a.args, key)
-}
-
-// PeekMulti returns all the arg values for the given key.
-func (a *Args) PeekMulti(key string) [][]byte {
-	var values [][]byte
-	a.VisitAll(func(k, v []byte) {
-		if string(k) == key {
-			values = append(values, v)
-		}
-	})
-	return values
-}
-
-// PeekMultiBytes returns all the arg values for the given key.
-func (a *Args) PeekMultiBytes(key []byte) [][]byte {
-	return a.PeekMulti(b2s(key))
-}
-
-// Has returns true if the given key exists in Args.
-func (a *Args) Has(key string) bool {
-	return hasArg(a.args, key)
-}
-
-// HasBytes returns true if the given key exists in Args.
-func (a *Args) HasBytes(key []byte) bool {
-	return hasArg(a.args, b2s(key))
-}
-
-// ErrNoArgValue is returned when Args value with the given key is missing.
-var ErrNoArgValue = errors.New("no Args value for the given key")
-
-// GetUint returns uint value for the given key.
-func (a *Args) GetUint(key string) (int, error) {
-	value := a.Peek(key)
-	if len(value) == 0 {
-		return -1, ErrNoArgValue
-	}
-	return ParseUint(value)
-}
-
-// SetUint sets uint value for the given key.
-func (a *Args) SetUint(key string, value int) {
-	bb := AcquireByteBuffer()
-	bb.B = AppendUint(bb.B[:0], value)
-	a.SetBytesV(key, bb.B)
-	ReleaseByteBuffer(bb)
-}
-
-// SetUintBytes sets uint value for the given key.
-func (a *Args) SetUintBytes(key []byte, value int) {
-	a.SetUint(b2s(key), value)
-}
-
-// GetUintOrZero returns uint value for the given key.
-//
-// Zero (0) is returned on error.
-func (a *Args) GetUintOrZero(key string) int {
-	n, err := a.GetUint(key)
-	if err != nil {
-		n = 0
-	}
-	return n
-}
-
-// GetUfloat returns ufloat value for the given key.
-func (a *Args) GetUfloat(key string) (float64, error) {
-	value := a.Peek(key)
-	if len(value) == 0 {
-		return -1, ErrNoArgValue
-	}
-	return ParseUfloat(value)
-}
-
-// GetUfloatOrZero returns ufloat value for the given key.
-//
-// Zero (0) is returned on error.
-func (a *Args) GetUfloatOrZero(key string) float64 {
-	f, err := a.GetUfloat(key)
-	if err != nil {
-		f = 0
-	}
-	return f
-}
-
-// GetBool returns boolean value for the given key.
-//
-// true is returned for '1', 'y' and 'yes' values,
-// otherwise false is returned.
-func (a *Args) GetBool(key string) bool {
-	switch string(a.Peek(key)) {
-	case "1", "y", "yes":
-		return true
-	default:
-		return false
-	}
-}
-
-func visitArgs(args []argsKV, f func(k, v []byte)) {
-	for i, n := 0, len(args); i < n; i++ {
-		kv := &args[i]
-		f(kv.key, kv.value)
-	}
-}
-
-func copyArgs(dst, src []argsKV) []argsKV {
-	if cap(dst) < len(src) {
-		tmp := make([]argsKV, len(src))
-		copy(tmp, dst)
-		dst = tmp
-	}
-	n := len(src)
-	dst = dst[:n]
-	for i := 0; i < n; i++ {
-		dstKV := &dst[i]
-		srcKV := &src[i]
-		dstKV.key = append(dstKV.key[:0], srcKV.key...)
-		dstKV.value = append(dstKV.value[:0], srcKV.value...)
-	}
-	return dst
-}
-
-func delAllArgsBytes(args []argsKV, key []byte) []argsKV {
-	return delAllArgs(args, b2s(key))
-}
-
-func delAllArgs(args []argsKV, key string) []argsKV {
-	for i, n := 0, len(args); i < n; i++ {
-		kv := &args[i]
-		if key == string(kv.key) {
-			tmp := *kv
-			copy(args[i:], args[i+1:])
-			n--
-			args[n] = tmp
-			args = args[:n]
-		}
-	}
-	return args
-}
-
-func setArgBytes(h []argsKV, key, value []byte) []argsKV {
-	return setArg(h, b2s(key), b2s(value))
-}
-
-func setArg(h []argsKV, key, value string) []argsKV {
-	n := len(h)
-	for i := 0; i < n; i++ {
-		kv := &h[i]
-		if key == string(kv.key) {
-			kv.value = append(kv.value[:0], value...)
-			return h
-		}
-	}
-	return appendArg(h, key, value)
-}
-
-func appendArgBytes(h []argsKV, key, value []byte) []argsKV {
-	return appendArg(h, b2s(key), b2s(value))
-}
-
-func appendArg(args []argsKV, key, value string) []argsKV {
-	var kv *argsKV
-	args, kv = allocArg(args)
-	kv.key = append(kv.key[:0], key...)
-	kv.value = append(kv.value[:0], value...)
-	return args
-}
-
-func allocArg(h []argsKV) ([]argsKV, *argsKV) {
-	n := len(h)
-	if cap(h) > n {
-		h = h[:n+1]
-	} else {
-		h = append(h, argsKV{})
-	}
-	return h, &h[n]
-}
-
-func releaseArg(h []argsKV) []argsKV {
-	return h[:len(h)-1]
-}
-
-func hasArg(h []argsKV, key string) bool {
-	for i, n := 0, len(h); i < n; i++ {
-		kv := &h[i]
-		if key == string(kv.key) {
-			return true
-		}
-	}
-	return false
-}
-
-func peekArgBytes(h []argsKV, k []byte) []byte {
-	for i, n := 0, len(h); i < n; i++ {
-		kv := &h[i]
-		if bytes.Equal(kv.key, k) {
-			return kv.value
-		}
-	}
-	return nil
-}
-
-func peekArgStr(h []argsKV, k string) []byte {
-	for i, n := 0, len(h); i < n; i++ {
-		kv := &h[i]
-		if string(kv.key) == k {
-			return kv.value
-		}
-	}
-	return nil
-}
-
-type argsScanner struct {
-	b []byte
-}
-
-func (s *argsScanner) next(kv *argsKV) bool {
-	if len(s.b) == 0 {
-		return false
-	}
-
-	isKey := true
-	k := 0
-	for i, c := range s.b {
-		switch c {
-		case '=':
-			if isKey {
-				isKey = false
-				kv.key = decodeArg(kv.key, s.b[:i], true)
-				k = i + 1
-			}
-		case '&':
-			if isKey {
-				kv.key = decodeArg(kv.key, s.b[:i], true)
-				kv.value = kv.value[:0]
-			} else {
-				kv.value = decodeArg(kv.value, s.b[k:i], true)
-			}
-			s.b = s.b[i+1:]
-			return true
-		}
-	}
-
-	if isKey {
-		kv.key = decodeArg(kv.key, s.b, true)
-		kv.value = kv.value[:0]
-	} else {
-		kv.value = decodeArg(kv.value, s.b[k:], true)
-	}
-	s.b = s.b[len(s.b):]
-	return true
-}
-
-func decodeArg(dst, src []byte, decodePlus bool) []byte {
-	return decodeArgAppend(dst[:0], src, decodePlus)
-}
-
-func decodeArgAppend(dst, src []byte, decodePlus bool) []byte {
-	for i, n := 0, len(src); i < n; i++ {
-		c := src[i]
-		if c == '%' {
-			if i+2 >= n {
-				return append(dst, src[i:]...)
-			}
-			x1 := hexbyte2int(src[i+1])
-			x2 := hexbyte2int(src[i+2])
-			if x1 < 0 || x2 < 0 {
-				dst = append(dst, c)
-			} else {
-				dst = append(dst, byte(x1<<4|x2))
-				i += 2
-			}
-		} else if decodePlus && c == '+' {
-			dst = append(dst, ' ')
-		} else {
-			dst = append(dst, c)
-		}
-	}
-	return dst
-}

vendor/github.com/valyala/fasthttp/bytebuffer.go

@@ -1,64 +0,0 @@
-package fasthttp
-
-import (
-	"github.com/valyala/bytebufferpool"
-)
-
-// ByteBuffer provides byte buffer, which can be used with fasthttp API
-// in order to minimize memory allocations.
-//
-// ByteBuffer may be used with functions appending data to the given []byte
-// slice. See example code for details.
-//
-// Use AcquireByteBuffer for obtaining an empty byte buffer.
-//
-// ByteBuffer is deprecated. Use github.com/valyala/bytebufferpool instead.
-type ByteBuffer bytebufferpool.ByteBuffer
-
-// Write implements io.Writer - it appends p to ByteBuffer.B
-func (b *ByteBuffer) Write(p []byte) (int, error) {
-	return bb(b).Write(p)
-}
-
-// WriteString appends s to ByteBuffer.B
-func (b *ByteBuffer) WriteString(s string) (int, error) {
-	return bb(b).WriteString(s)
-}
-
-// Set sets ByteBuffer.B to p
-func (b *ByteBuffer) Set(p []byte) {
-	bb(b).Set(p)
-}
-
-// SetString sets ByteBuffer.B to s
-func (b *ByteBuffer) SetString(s string) {
-	bb(b).SetString(s)
-}
-
-// Reset makes ByteBuffer.B empty.
-func (b *ByteBuffer) Reset() {
-	bb(b).Reset()
-}
-
-// AcquireByteBuffer returns an empty byte buffer from the pool.
-//
-// Acquired byte buffer may be returned to the pool via ReleaseByteBuffer call.
-// This reduces the number of memory allocations required for byte buffer
-// management.
-func AcquireByteBuffer() *ByteBuffer {
-	return (*ByteBuffer)(defaultByteBufferPool.Get())
-}
-
-// ReleaseByteBuffer returns byte buffer to the pool.
-//
-// ByteBuffer.B mustn't be touched after returning it to the pool.
-// Otherwise data races occur.
-func ReleaseByteBuffer(b *ByteBuffer) {
-	defaultByteBufferPool.Put(bb(b))
-}
-
-func bb(b *ByteBuffer) *bytebufferpool.ByteBuffer {
-	return (*bytebufferpool.ByteBuffer)(b)
-}
-
-var defaultByteBufferPool bytebufferpool.Pool

vendor/github.com/valyala/fasthttp/bytesconv.go

@@ -1,422 +0,0 @@
-package fasthttp
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"math"
-	"net"
-	"reflect"
-	"sync"
-	"time"
-	"unsafe"
-)
-
-// AppendHTMLEscape appends html-escaped s to dst and returns the extended dst.
-func AppendHTMLEscape(dst []byte, s string) []byte {
-	var prev int
-	var sub string
-	for i, n := 0, len(s); i < n; i++ {
-		sub = ""
-		switch s[i] {
-		case '<':
-			sub = "&lt;"
-		case '>':
-			sub = "&gt;"
-		case '"':
-			sub = "&quot;"
-		case '\'':
-			sub = "&#39;"
-		}
-		if len(sub) > 0 {
-			dst = append(dst, s[prev:i]...)
-			dst = append(dst, sub...)
-			prev = i + 1
-		}
-	}
-	return append(dst, s[prev:]...)
-}
-
-// AppendHTMLEscapeBytes appends html-escaped s to dst and returns
-// the extended dst.
-func AppendHTMLEscapeBytes(dst, s []byte) []byte {
-	return AppendHTMLEscape(dst, b2s(s))
-}
-
-// AppendIPv4 appends string representation of the given ip v4 to dst
-// and returns the extended dst.
-func AppendIPv4(dst []byte, ip net.IP) []byte {
-	ip = ip.To4()
-	if ip == nil {
-		return append(dst, "non-v4 ip passed to AppendIPv4"...)
-	}
-
-	dst = AppendUint(dst, int(ip[0]))
-	for i := 1; i < 4; i++ {
-		dst = append(dst, '.')
-		dst = AppendUint(dst, int(ip[i]))
-	}
-	return dst
-}
-
-var errEmptyIPStr = errors.New("empty ip address string")
-
-// ParseIPv4 parses ip address from ipStr into dst and returns the extended dst.
-func ParseIPv4(dst net.IP, ipStr []byte) (net.IP, error) {
-	if len(ipStr) == 0 {
-		return dst, errEmptyIPStr
-	}
-	if len(dst) < net.IPv4len {
-		dst = make([]byte, net.IPv4len)
-	}
-	copy(dst, net.IPv4zero)
-	dst = dst.To4()
-	if dst == nil {
-		panic("BUG: dst must not be nil")
-	}
-
-	b := ipStr
-	for i := 0; i < 3; i++ {
-		n := bytes.IndexByte(b, '.')
-		if n < 0 {
-			return dst, fmt.Errorf("cannot find dot in ipStr %q", ipStr)
-		}
-		v, err := ParseUint(b[:n])
-		if err != nil {
-			return dst, fmt.Errorf("cannot parse ipStr %q: %s", ipStr, err)
-		}
-		if v > 255 {
-			return dst, fmt.Errorf("cannot parse ipStr %q: ip part cannot exceed 255: parsed %d", ipStr, v)
-		}
-		dst[i] = byte(v)
-		b = b[n+1:]
-	}
-	v, err := ParseUint(b)
-	if err != nil {
-		return dst, fmt.Errorf("cannot parse ipStr %q: %s", ipStr, err)
-	}
-	if v > 255 {
-		return dst, fmt.Errorf("cannot parse ipStr %q: ip part cannot exceed 255: parsed %d", ipStr, v)
-	}
-	dst[3] = byte(v)
-
-	return dst, nil
-}
-
-// AppendHTTPDate appends HTTP-compliant (RFC1123) representation of date
-// to dst and returns the extended dst.
-func AppendHTTPDate(dst []byte, date time.Time) []byte {
-	dst = date.In(time.UTC).AppendFormat(dst, time.RFC1123)
-	copy(dst[len(dst)-3:], strGMT)
-	return dst
-}
-
-// ParseHTTPDate parses HTTP-compliant (RFC1123) date.
-func ParseHTTPDate(date []byte) (time.Time, error) {
-	return time.Parse(time.RFC1123, b2s(date))
-}
-
-// AppendUint appends n to dst and returns the extended dst.
-func AppendUint(dst []byte, n int) []byte {
-	if n < 0 {
-		panic("BUG: int must be positive")
-	}
-
-	var b [20]byte
-	buf := b[:]
-	i := len(buf)
-	var q int
-	for n >= 10 {
-		i--
-		q = n / 10
-		buf[i] = '0' + byte(n-q*10)
-		n = q
-	}
-	i--
-	buf[i] = '0' + byte(n)
-
-	dst = append(dst, buf[i:]...)
-	return dst
-}
-
-// ParseUint parses uint from buf.
-func ParseUint(buf []byte) (int, error) {
-	v, n, err := parseUintBuf(buf)
-	if n != len(buf) {
-		return -1, errUnexpectedTrailingChar
-	}
-	return v, err
-}
-
-var (
-	errEmptyInt               = errors.New("empty integer")
-	errUnexpectedFirstChar    = errors.New("unexpected first char found. Expecting 0-9")
-	errUnexpectedTrailingChar = errors.New("unexpected traling char found. Expecting 0-9")
-	errTooLongInt             = errors.New("too long int")
-)
-
-func parseUintBuf(b []byte) (int, int, error) {
-	n := len(b)
-	if n == 0 {
-		return -1, 0, errEmptyInt
-	}
-	v := 0
-	for i := 0; i < n; i++ {
-		c := b[i]
-		k := c - '0'
-		if k > 9 {
-			if i == 0 {
-				return -1, i, errUnexpectedFirstChar
-			}
-			return v, i, nil
-		}
-		if i >= maxIntChars {
-			return -1, i, errTooLongInt
-		}
-		v = 10*v + int(k)
-	}
-	return v, n, nil
-}
-
-var (
-	errEmptyFloat           = errors.New("empty float number")
-	errDuplicateFloatPoint  = errors.New("duplicate point found in float number")
-	errUnexpectedFloatEnd   = errors.New("unexpected end of float number")
-	errInvalidFloatExponent = errors.New("invalid float number exponent")
-	errUnexpectedFloatChar  = errors.New("unexpected char found in float number")
-)
-
-// ParseUfloat parses unsigned float from buf.
-func ParseUfloat(buf []byte) (float64, error) {
-	if len(buf) == 0 {
-		return -1, errEmptyFloat
-	}
-	b := buf
-	var v uint64
-	var offset = 1.0
-	var pointFound bool
-	for i, c := range b {
-		if c < '0' || c > '9' {
-			if c == '.' {
-				if pointFound {
-					return -1, errDuplicateFloatPoint
-				}
-				pointFound = true
-				continue
-			}
-			if c == 'e' || c == 'E' {
-				if i+1 >= len(b) {
-					return -1, errUnexpectedFloatEnd
-				}
-				b = b[i+1:]
-				minus := -1
-				switch b[0] {
-				case '+':
-					b = b[1:]
-					minus = 1
-				case '-':
-					b = b[1:]
-				default:
-					minus = 1
-				}
-				vv, err := ParseUint(b)
-				if err != nil {
-					return -1, errInvalidFloatExponent
-				}
-				return float64(v) * offset * math.Pow10(minus*int(vv)), nil
-			}
-			return -1, errUnexpectedFloatChar
-		}
-		v = 10*v + uint64(c-'0')
-		if pointFound {
-			offset /= 10
-		}
-	}
-	return float64(v) * offset, nil
-}
-
-var (
-	errEmptyHexNum    = errors.New("empty hex number")
-	errTooLargeHexNum = errors.New("too large hex number")
-)
-
-func readHexInt(r *bufio.Reader) (int, error) {
-	n := 0
-	i := 0
-	var k int
-	for {
-		c, err := r.ReadByte()
-		if err != nil {
-			if err == io.EOF && i > 0 {
-				return n, nil
-			}
-			return -1, err
-		}
-		k = hexbyte2int(c)
-		if k < 0 {
-			if i == 0 {
-				return -1, errEmptyHexNum
-			}
-			r.UnreadByte()
-			return n, nil
-		}
-		if i >= maxHexIntChars {
-			return -1, errTooLargeHexNum
-		}
-		n = (n << 4) | k
-		i++
-	}
-}
-
-var hexIntBufPool sync.Pool
-
-func writeHexInt(w *bufio.Writer, n int) error {
-	if n < 0 {
-		panic("BUG: int must be positive")
-	}
-
-	v := hexIntBufPool.Get()
-	if v == nil {
-		v = make([]byte, maxHexIntChars+1)
-	}
-	buf := v.([]byte)
-	i := len(buf) - 1
-	for {
-		buf[i] = int2hexbyte(n & 0xf)
-		n >>= 4
-		if n == 0 {
-			break
-		}
-		i--
-	}
-	_, err := w.Write(buf[i:])
-	hexIntBufPool.Put(v)
-	return err
-}
-
-func int2hexbyte(n int) byte {
-	if n < 10 {
-		return '0' + byte(n)
-	}
-	return 'a' + byte(n) - 10
-}
-
-func hexCharUpper(c byte) byte {
-	if c < 10 {
-		return '0' + c
-	}
-	return c - 10 + 'A'
-}
-
-var hex2intTable = func() []byte {
-	b := make([]byte, 255)
-	for i := byte(0); i < 255; i++ {
-		c := byte(0)
-		if i >= '0' && i <= '9' {
-			c = 1 + i - '0'
-		} else if i >= 'a' && i <= 'f' {
-			c = 1 + i - 'a' + 10
-		} else if i >= 'A' && i <= 'F' {
-			c = 1 + i - 'A' + 10
-		}
-		b[i] = c
-	}
-	return b
-}()
-
-func hexbyte2int(c byte) int {
-	return int(hex2intTable[c]) - 1
-}
-
-const toLower = 'a' - 'A'
-
-func uppercaseByte(p *byte) {
-	c := *p
-	if c >= 'a' && c <= 'z' {
-		*p = c - toLower
-	}
-}
-
-func lowercaseByte(p *byte) {
-	c := *p
-	if c >= 'A' && c <= 'Z' {
-		*p = c + toLower
-	}
-}
-
-func lowercaseBytes(b []byte) {
-	for i, n := 0, len(b); i < n; i++ {
-		lowercaseByte(&b[i])
-	}
-}
-
-// b2s converts byte slice to a string without memory allocation.
-// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
-//
-// Note it may break if string and/or slice header will change
-// in the future go versions.
-func b2s(b []byte) string {
-	return *(*string)(unsafe.Pointer(&b))
-}
-
-// s2b converts string to a byte slice without memory allocation.
-//
-// Note it may break if string and/or slice header will change
-// in the future go versions.
-func s2b(s string) []byte {
-	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
-	bh := reflect.SliceHeader{
-		Data: sh.Data,
-		Len:  sh.Len,
-		Cap:  sh.Len,
-	}
-	return *(*[]byte)(unsafe.Pointer(&bh))
-}
-
-// AppendQuotedArg appends url-encoded src to dst and returns appended dst.
-func AppendQuotedArg(dst, src []byte) []byte {
-	for _, c := range src {
-		// See http://www.w3.org/TR/html5/forms.html#form-submission-algorithm
-		if c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' ||
-			c == '*' || c == '-' || c == '.' || c == '_' {
-			dst = append(dst, c)
-		} else {
-			dst = append(dst, '%', hexCharUpper(c>>4), hexCharUpper(c&15))
-		}
-	}
-	return dst
-}
-
-func appendQuotedPath(dst, src []byte) []byte {
-	for _, c := range src {
-		if c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' ||
-			c == '/' || c == '.' || c == ',' || c == '=' || c == ':' || c == '&' || c == '~' || c == '-' || c == '_' {
-			dst = append(dst, c)
-		} else {
-			dst = append(dst, '%', hexCharUpper(c>>4), hexCharUpper(c&15))
-		}
-	}
-	return dst
-}
-
-// EqualBytesStr returns true if string(b) == s.
-//
-// This function has no performance benefits comparing to string(b) == s.
-// It is left here for backwards compatibility only.
-//
-// This function is deperecated and may be deleted soon.
-func EqualBytesStr(b []byte, s string) bool {
-	return string(b) == s
-}
-
-// AppendBytesStr appends src to dst and returns the extended dst.
-//
-// This function has no performance benefits comparing to append(dst, src...).
-// It is left here for backwards compatibility only.
-//
-// This function is deprecated and may be deleted soon.
-func AppendBytesStr(dst []byte, src string) []byte {
-	return append(dst, src...)
-}