egg_im/pkg/util/string.go

package util

import (
	"math/rand"
	"time"
	"unsafe"
)

var r *rand.Rand

func init() {
	r = rand.New(rand.NewSource(time.Now().Unix()))
}

func Str2bytes(s string) []byte {
	x := (*[2]uintptr)(unsafe.Pointer(&s))
	h := [3]uintptr{x[0], x[1], x[1]}
	return *(*[]byte)(unsafe.Pointer(&h))
}

func Bytes2str(b []byte) string {
	return *(*string)(unsafe.Pointer(&b))
}

// RandString 生成随机字符串
func RandString(len int) string {
	bytes := make([]byte, len)
	for i := 0; i < len; i++ {
		b := r.Intn(26) + 65
		bytes[i] = byte(b)
	}
	return string(bytes)
}