69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
package maths
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import (
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"math/big"
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"strings"
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uuid "github.com/satori/go.uuid"
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)
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const CODE62 = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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const CodeLenth = 62
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/**
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* 10进制 为 62进制 字符串。大数字类型
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*
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* param: *big.Int number 待转换的数字，非常大的
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* return: string
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*/
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func From10To62Big(number *big.Int) string {
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tmpNumber := big.NewInt(0)
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var result []byte
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for number.Cmp(big.NewInt(0)) != 0 {
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var tmp []byte
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tmpNumber.Rem(number, big.NewInt(CodeLenth))
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tmp = append(tmp, CODE62[tmpNumber.Int64()])
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result = append(tmp, result...)
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number.Div(number, big.NewInt(CodeLenth))
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}
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return string(result)
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}
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/**
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* 10进制 为 62进制 字符串。大数字类型
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*
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* param: int64 num 待转换的数字
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* return: string
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*/
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func From10To62(number int64) string {
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var result []byte
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for number != 0 {
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var tmp []byte
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number1 := number % CodeLenth
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tmp = append(tmp, CODE62[number1])
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result = append(tmp, result...)
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number = number / CodeLenth
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}
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return string(result)
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}
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func GenUUID() string {
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u1 := uuid.Must(uuid.NewV4(), nil).String()
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uuidStr := strings.Replace(u1, "-", "", -1)
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number, _ := new(big.Int).SetString(uuidStr, 16)
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return From10To62Big(number)
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}
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func Abs(n int64) int64 {
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if n < 0 {
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return -n
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}
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return n
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}
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func Gen32String() string {
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u1 := uuid.Must(uuid.NewV4(), nil).String()
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uuidStr := strings.Replace(u1, "-", "", -1)
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return uuidStr
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}
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