File size: 738 Bytes
619f93d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | package random
import (
"crypto/rand"
"math/big"
mathRand "math/rand"
"time"
"github.com/google/uuid"
)
var Rand *mathRand.Rand
const letterBytes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
func String(n int) string {
b := make([]byte, n)
letterLen := big.NewInt(int64(len(letterBytes)))
for i := range b {
idx, err := rand.Int(rand.Reader, letterLen)
if err != nil {
panic(err)
}
b[i] = letterBytes[idx.Int64()]
}
return string(b)
}
func Token() string {
return "openlist-" + uuid.NewString() + String(64)
}
func RangeInt64(left, right int64) int64 {
return mathRand.Int63n(left+right) - left
}
func init() {
s := mathRand.NewSource(time.Now().UnixNano())
Rand = mathRand.New(s)
}
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