31 lines
576 B
Go
31 lines
576 B
Go
|
package uuid
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"math/rand"
|
||
|
|
"os"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
var initialized bool
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
if !initialized {
|
||
|
|
rand.Seed(time.Now().UnixNano() + int64(os.Getpid()))
|
||
|
|
initialized = true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func UUID() string {
|
||
|
|
var entropy = make([]byte, 16)
|
||
|
|
|
||
|
|
if !initialized {
|
||
|
|
rand.Seed(time.Now().UnixNano() + int64(os.Getpid()))
|
||
|
|
initialized = true
|
||
|
|
}
|
||
|
|
rand.Read(entropy)
|
||
|
|
entropy[6] = (entropy[6] & 0x0f) | 0x40
|
||
|
|
entropy[8] = (entropy[8] & 0x3f) | 0x80
|
||
|
|
return fmt.Sprintf("%08x-%04x-%04x-%04x-%12x", entropy[0:4], entropy[4:6], entropy[6:8], entropy[8:10], entropy[10:16])
|
||
|
|
}
|