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rand.go
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rand.go
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package utils
// https://github.com/yuwf/gobase
import (
"math/rand"
"time"
"github.com/rs/zerolog/log"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
// 标准库内的函数 过渡下,加下判断,防止panic
//RandInt int随机数
func RandInt() int {
return rand.Int()
}
//RandIntn [0,n)的随机数
func RandIntn(n int) int {
if n <= 0 {
caller := GetCallerDesc(1)
log.Error().Int("n", n).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Intn(n)
}
//RandInt31 int32随机数
func RandInt31() int32 {
return rand.Int31()
}
//RandInt31n [0,n)的随机数
func RandInt31n(n int32) int32 {
if n <= 0 {
caller := GetCallerDesc(1)
log.Error().Int32("n", n).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int31n(n)
}
//RandUint32 uint32
func RandUint32() uint32 {
return rand.Uint32()
}
//RandInt63 int64随机数
func RandInt63() int64 {
return rand.Int63()
}
//RandInt63n [0,n)的随机数
func RandInt63n(n int64) int64 {
if n <= 0 {
caller := GetCallerDesc(1)
log.Error().Int64("n", n).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int63n(n)
}
//RandUint64 uint64
func RandUint64() uint64 {
return rand.Uint64()
}
//RandFloat32 float32[0,1.0)
func RandFloat32() float32 {
return rand.Float32()
}
//RandFloat64 float64[0,1.0)
func RandFloat64() float64 {
return rand.Float64()
}
// 自定义的函数
//RandIntnm [n,m)的随机数
func RandIntnm(n, m int) int {
if !(n >= 0 && m > n) {
caller := GetCallerDesc(1)
log.Error().Int("n", n).Int("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int()%(m-n) + n
}
//RandIntnm2 [n,m]的随机数
func RandIntnm2(n, m int) int {
if !(n >= 0 && m >= n) {
caller := GetCallerDesc(1)
log.Error().Int("n", n).Int("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int()%(m-n+1) + n
}
//RandInt31nm [n,m)的随机数
func RandInt31nm(n, m int32) int32 {
if !(n >= 0 && m > n) {
caller := GetCallerDesc(1)
log.Error().Int32("n", n).Int32("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int31()%(m-n) + n
}
//RandInt31nm2 [n,m]的随机数
func RandInt31nm2(n, m int32) int32 {
if !(n >= 0 && m >= n) {
caller := GetCallerDesc(1)
log.Error().Int32("n", n).Int32("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int31()%(m-n+1) + n
}
//RandInt63nm [n,m)的随机数
func RandInt63nm(n, m int64) int64 {
if !(n >= 0 && m > n) {
caller := GetCallerDesc(1)
log.Error().Int64("n", n).Int64("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int63()%(m-n) + n
}
//RandInt63nm2 [n,m]的随机数
func RandInt63nm2(n, m int64) int64 {
if !(n >= 0 && m >= n) {
caller := GetCallerDesc(1)
log.Error().Int64("n", n).Int64("m", m).Str("pos", caller.Pos()).Msg("RandParamErr")
return 0
}
return rand.Int63()%(m-n+1) + n
}
func RandShuffle(n int, swap func(i, j int)) {
if n < 0 {
caller := GetCallerDesc(1)
log.Error().Int("n", n).Str("pos", caller.Pos()).Msg("RandParamErr")
return
}
rand.Shuffle(n, swap)
}
func RandShuffleSlice[T any](collection []T) []T {
rand.Shuffle(len(collection), func(i, j int) {
collection[i], collection[j] = collection[j], collection[i]
})
return collection
}
var (
LowerCaseLettersCharset = []byte("abcdefghijklmnopqrstuvwxyz")
UpperCaseLettersCharset = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
LettersCharset = append(LowerCaseLettersCharset, UpperCaseLettersCharset...)
NumbersCharset = []byte("0123456789")
AlphanumericCharset = append(LettersCharset, NumbersCharset...)
SpecialCharset = []byte("!@#$%^&*()_+-=[]{}|;':\",./<>?")
AllCharset = append(AlphanumericCharset, SpecialCharset...)
)
//生成随机字符串
func RandString(size int) string {
var charactersCount = len(AlphanumericCharset)
token := []byte{}
for i := 0; i < size; i++ {
index := RandIntn(charactersCount)
token = append(token, AlphanumericCharset[index])
}
return string(token)
}
func RandString2(size int, charset []byte) string {
if size <= 0 {
caller := GetCallerDesc(1)
log.Error().Int("size", size).Str("pos", caller.Pos()).Msg("RandString2")
return ""
}
if len(charset) <= 0 {
caller := GetCallerDesc(1)
log.Error().Int("charset", len(charset)).Str("pos", caller.Pos()).Msg("RandString2")
return ""
}
b := make([]byte, size)
charactersCount := len(charset)
for i := range b {
b[i] = charset[RandIntn(charactersCount)]
}
return string(b)
}