mirror of
https://github.com/taigrr/colorhash.git
synced 2026-04-02 03:08:48 -07:00
39 lines
596 B
Go
39 lines
596 B
Go
package colorhash
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import (
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"encoding/binary"
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"hash/fnv"
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"io"
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)
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const (
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MaxUint = ^uint(0)
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MaxInt = int(MaxUint >> 1)
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)
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func HashString(s string) int {
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h := fnv.New64()
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io.WriteString(h, s)
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hashb := h.Sum(nil)
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hashb = hashb[len(hashb)-8:]
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lsb := binary.BigEndian.Uint64(hashb)
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sint := int(lsb)
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if sint < 0 {
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sint = sint + MaxInt
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}
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return sint
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}
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func HashBytes(r io.Reader) int {
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h := fnv.New64()
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io.Copy(h, r)
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hashb := h.Sum(nil)
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hashb = hashb[len(hashb)-8:]
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lsb := binary.BigEndian.Uint64(hashb)
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sint := int(lsb)
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if sint < 0 {
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sint = sint + MaxInt
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}
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return sint
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}
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