19 lines
328 B
Go
19 lines
328 B
Go
package common
|
||
|
||
import (
|
||
"crypto/rand"
|
||
"math/big"
|
||
)
|
||
|
||
// RandomInt 返回一个 0 .. max-1 之间的随机整数（使用 crypto/rand）
|
||
func RandomInt(max int) int {
|
||
if max <= 0 {
|
||
return 0
|
||
}
|
||
n, err := rand.Int(rand.Reader, big.NewInt(int64(max)))
|
||
if err != nil {
|
||
return 0
|
||
}
|
||
return int(n.Int64())
|
||
}
|