mindoc/utils/krand.go

31 lines
662 B
Go

package utils
import (
"time"
"math/rand"
)
const (
KC_RAND_KIND_NUM = 0 // 纯数字
KC_RAND_KIND_LOWER = 1 // 小写字母
KC_RAND_KIND_UPPER = 2 // 大写字母
KC_RAND_KIND_ALL = 3 // 数字、大小写字母
)
// 随机字符串
func Krand(size int, kind int) []byte {
ikind, kinds, result := kind, [][]int{[]int{10, 48}, []int{26, 97}, []int{26, 65}}, make([]byte, size)
is_all := kind > 2 || kind < 0
rand.Seed(time.Now().UnixNano())
for i :=0; i < size; i++ {
if is_all { // random ikind
ikind = rand.Intn(3)
}
scope, base := kinds[ikind][0], kinds[ikind][1]
result[i] = uint8(base+rand.Intn(scope))
}
return result
}