mirror of
https://github.com/gotoeasy/glogcenter.git
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115 lines
2.2 KiB
Go
115 lines
2.2 KiB
Go
package cmn
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import (
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"bytes"
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"encoding/binary"
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"encoding/gob"
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"fmt"
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"glc/ldb/conf"
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"hash/crc32"
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"os"
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"strconv"
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"time"
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"unicode/utf8"
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"unsafe"
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)
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// 字符串(10进制无符号整数形式)转uint32，超过uint32最大值会丢失精度
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// 转换失败时返回默认值
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func StringToUint32(s string, defaultVal uint32) uint32 {
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v, err := strconv.ParseUint(s, 10, 32)
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if err != nil {
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return defaultVal
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}
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return uint32(v & 0xFFFFFFFF)
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}
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// 字符串(10进制无符号整数形式)转uint64
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// 转换失败时返回默认值
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func StringToUint64(s string, defaultVal uint64) uint64 {
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v, err := strconv.ParseUint(s, 10, 64)
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if err != nil {
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return defaultVal
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}
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return v
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}
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func StringToBytes(s string) []byte {
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return *(*[]byte)(unsafe.Pointer(
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&struct {
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string
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Cap int
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}{s, len(s)},
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))
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}
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func BytesToString(b []byte) string {
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return *(*string)(unsafe.Pointer(&b))
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}
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func Uint32ToBytes(num uint32) []byte {
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bkey := make([]byte, 4)
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binary.BigEndian.PutUint32(bkey, num)
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return bkey
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}
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func BytesToUint32(bytes []byte) uint32 {
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return uint32(binary.BigEndian.Uint32(bytes))
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}
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func Uint64ToBytes(num uint64) []byte {
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bkey := make([]byte, 8)
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binary.BigEndian.PutUint64(bkey, num)
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return bkey
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}
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func BytesToUint64(bytes []byte) uint64 {
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return binary.BigEndian.Uint64(bytes)
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}
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func LenRune(str string) int {
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return utf8.RuneCountInString(str)
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}
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func LeftRune(str string, length int) string {
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if LenRune(str) <= length {
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return str
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}
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var rs string
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for i, s := range str {
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if i == length {
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break
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}
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rs = rs + string(s)
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}
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return rs
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}
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func PathSeparator() string {
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return string(os.PathSeparator)
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}
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// 字符串哈希处理后取模(余数)，返回值最大不超过mod值
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func HashAndMod(str string, mod uint32) string {
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txt := "添油" + str + "加醋"
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return fmt.Sprint(crc32.ChecksumIEEE(StringToBytes(txt)) % mod)
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}
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func ToBytes(data any) []byte {
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buffer := new(bytes.Buffer)
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encoder := gob.NewEncoder(buffer)
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err := encoder.Encode(data)
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if err != nil {
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panic(err)
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}
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return buffer.Bytes()
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}
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func GeyStoreNameByDate(name string) string {
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if conf.IsStoreNameAutoAddDate() {
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return fmt.Sprint(name, "-", time.Now().Format("20060102")) // name-yyyymmdd
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}
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return name
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}
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