36 lines
659 B
Go
36 lines
659 B
Go
package hashcode
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import (
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"bytes"
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"fmt"
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"hash/crc32"
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)
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// String hashes a string to a unique hashcode.
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//
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// crc32 returns a uint32, but for our use we need
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// a non negative integer. Here we cast to an integer
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// and invert it if the result is negative.
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func String(s string) int {
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v := int(crc32.ChecksumIEEE([]byte(s)))
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if v >= 0 {
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return v
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}
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if -v >= 0 {
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return -v
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}
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// v == MinInt
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return 0
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}
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// Strings hashes a list of strings to a unique hashcode.
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func Strings(strings []string) string {
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var buf bytes.Buffer
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for _, s := range strings {
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buf.WriteString(fmt.Sprintf("%s-", s))
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}
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return fmt.Sprintf("%d", String(buf.String()))
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}
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