mirror of
https://github.com/jimeh/rands.git
synced 2026-02-19 11:26:38 +00:00
Jim Myhrberg
16bd3ea3b9
Upgrade to Go 1.17 and golangci-lint to 1.64, and fix the linting issues that were found. Also upgrade CI workflow actions to latest versions, and setup a test matrix for relevant Go versions. BREAKING CHANGE: Minimum Go version changed from 1.15 to 1.17.
38 lines
663 B
Go
38 lines
663 B
Go
package rands
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import (
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"crypto/rand"
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"fmt"
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"math/big"
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)
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var ErrInvalidMaxInt = fmt.Errorf("%w: max cannot be less than 1", Err)
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// Int generates a random int ranging between 0 and nMax.
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func Int(nMax int) (int, error) {
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if nMax < 1 {
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return 0, ErrInvalidMaxInt
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}
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r, err := rand.Int(rand.Reader, big.NewInt(int64(nMax)))
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if err != nil {
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return 0, err
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}
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return int(r.Int64()), nil
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}
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// Int64 generates a random int64 ranging between 0 and nMax.
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func Int64(nMax int64) (int64, error) {
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if nMax < 1 {
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return 0, ErrInvalidMaxInt
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}
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r, err := rand.Int(rand.Reader, big.NewInt(nMax))
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if err != nil {
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return 0, err
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}
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return r.Int64(), nil
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}
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