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71 lines
1.5 KiB
71 lines
1.5 KiB
package gorandom
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import (
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"math/rand/v2"
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"time"
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)
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const numbers string = "0123456789"
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const letters string = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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const specials = "~!@#$%^*()_+-=[]{}|;:,./<>?"
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const alphanumerics string = letters + numbers
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const ascii string = alphanumerics + specials
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func random[T int | int64](n T, chars string) string {
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if n <= 0 {
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return ""
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}
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// 随机数生成器，加入时间戳保证每次生成的随机数不一样
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seed := time.Now().UnixNano() // rand内部运算的随机数
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r := rand.New(rand.NewPCG(uint64(seed), uint64(seed))) // rand计算得到的随机数
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bytes := make([]byte, n, n)
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l := len(chars)
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var i T = 0
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for {
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if i >= n {
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break
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}
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bytes[i] = chars[r.IntN(l)]
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i++
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}
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return string(bytes)
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}
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// Alphanumeric 随机字母数字
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func Alphanumeric[T int | int64](n T) string {
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return random(n, alphanumerics)
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}
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// Alphabetic 随机字母
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func Alphabetic[T int | int64](n T) string {
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return random(n, letters)
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}
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// Numeric 随机数字
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func Numeric[T int | int64](n T) string {
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return random(n, numbers)
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}
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// Ascii 随机ASCII
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func Ascii[T int | int64](n T) string {
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return random(n, ascii)
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}
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func Range(min int64, max int64) int64 {
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var number int64
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for {
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// 生成在范围 [min, max) 内的随机数
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number = int64(rand.IntN(int(max)-int(min)) + int(min))
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// 检查随机数是否大于 min 且小于 max
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if number > min && number < max {
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break
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}
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}
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return number
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}
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