gocommon/pkg/internal/util/num.go

package util

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

func Uint642String(num uint64) string {
	return strconv.FormatUint(num, 10)
}

func StringSecToDuration(str string, defaultValue ...string) time.Duration {
	result := String2Int64(str)
	if result == 0 {
		if defaultValue == nil || len(defaultValue) == 0 {
			return 0
		}
		result = String2Int64(defaultValue[0])
	}
	return time.Second * time.Duration(result)
}

func String2Uint64(nums string, defaultValue ...uint64) uint64 {
	loadDefaultValue := func() uint64 {
		if defaultValue == nil || len(defaultValue) == 0 {
			return 0
		}
		return defaultValue[0]
	}
	if nums == "" {
		return loadDefaultValue()
	}
	num, err := strconv.ParseUint(nums, 10, 64)
	if err != nil {
		// 异常，直接
		return loadDefaultValue()
	}
	return num
}

func Int642String(num int64) string {
	return strconv.FormatInt(num, 10)
}

func String2Int64(nums string, defaultValue ...int64) int64 {
	loadDefaultValue := func() int64 {
		if defaultValue == nil || len(defaultValue) == 0 {
			return 0
		}
		return defaultValue[0]
	}
	if nums == "" {
		return loadDefaultValue()
	}
	num, err := strconv.ParseInt(nums, 10, 64)
	if err != nil {
		return loadDefaultValue()
	}
	return num
}

func String2Int(nums string, defaultValue ...int) int {
	loadDefaultValue := func() int {
		if defaultValue == nil || len(defaultValue) == 0 {
			return 0
		}
		return defaultValue[0]
	}
	if nums == "" {
		return loadDefaultValue()
	}
	num, err := strconv.ParseInt(nums, 10, 64)
	if err != nil {
		return loadDefaultValue()
	}
	return int(num)
}

func Int2String(num int) string {
	return strconv.FormatInt(int64(num), 10)
}

func String2Bool(str string, defaultValue ...bool) bool {
	loadDefaultValue := func() bool {
		if defaultValue == nil || len(defaultValue) == 0 {
			return false
		}
		return defaultValue[0]
	}
	b, err := strconv.ParseBool(str)
	if err != nil {
		return loadDefaultValue()
	}
	return b
}

func String2Float64(str string, defaultValue ...float64) float64 {
	loadDefaultValue := func() float64 {
		if defaultValue == nil || len(defaultValue) == 0 {
			return 0
		}
		return defaultValue[0]
	}
	b, err := strconv.ParseFloat(str, 64)
	if err != nil {
		return loadDefaultValue()
	}
	return b
}

// 除固定值，保留固定小数位
func Float642String(num float64, saveDecimalPoint int) string {
	return strconv.FormatFloat(num, 'f', saveDecimalPoint, 64)
}

/**
比率限制，如果=0关闭，如果等于100全量
*/
func Rate100(threshold int64) bool {
	return RateInNum(threshold, 100)
}

/**
比率限制，如果=0关闭，如果等于100全量
*/
func RateInNum(threshold int64, totalSize int64) bool {
	return threshold > rand.Int63n(totalSize) // 0-99
}