69 lines
1.2 KiB
Go
69 lines
1.2 KiB
Go
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package seqs
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import (
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cr "crypto/rand"
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"math/big"
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mr "math/rand"
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"time"
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)
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// 随机生成器;
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type rand struct {
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}
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// 全局随机数;
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var rnd *mr.Rand
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func init() {
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rnd = mr.New(mr.NewSource(time.Now().UnixNano()))
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}
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// 构建;
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func Rand() *rand {
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return &rand{}
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}
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// 随机数字;
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func (rd *rand) DigitId(_len int) string {
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return rd.newId([]byte("0123456789"), _len)
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}
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// 随机字母;
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func (rd *rand) ChrtId(_len int) string {
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return rd.newId([]byte("abcdefghijklmnopqrstuvwxyz"), _len)
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}
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// 随机混合(数字+字母);
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func (rd *rand) BothId(_len int) string {
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return rd.newId([]byte("0123456789abcdefghijklmnopqrstuvwxyz"), _len)
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}
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// 随机范围(长整型);
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func (rd *rand) RandI64(min, max int64) int64 {
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bi, _ := cr.Int(cr.Reader, big.NewInt(max-min))
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return min + bi.Int64()
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}
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// 随机范围(0 ~ max);
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func (rd *rand) RandInt(max int) int {
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return rnd.Intn(max)
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}
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// 随机中文;
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func (rd *rand) ChrtCn(_len int) string {
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a := make([]rune, _len)
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for i := range a {
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a[i] = rune(rd.RandI64(19968, 40869))
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}
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return string(a)
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}
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// newId;
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func (rd *rand) newId(tmpl []byte, _len int) string {
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var r []byte
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for i := 0; i < _len; i++ {
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r = append(r, tmpl[rnd.Intn(len(tmpl))])
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}
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return string(r)
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}
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