25 lines
471 B
Go
25 lines
471 B
Go
package uuid
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import (
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"crypto/rand"
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"fmt"
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"time"
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)
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// Generates a time ordered UUID. Top 32 bits are a timestamp,
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// bottom 96 are random.
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func TimeOrderedUUID() string {
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unix := uint32(time.Now().UTC().Unix())
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b := make([]byte, 12)
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n, err := rand.Read(b)
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if n != len(b) {
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err = fmt.Errorf("Not enough entropy available")
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}
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if err != nil {
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panic(err)
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}
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return fmt.Sprintf("%08x-%04x-%04x-%04x-%04x%08x",
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unix, b[0:2], b[2:4], b[4:6], b[6:8], b[8:])
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}
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