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74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
package binlog
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import (
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"bytes"
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"encoding/hex"
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"strings"
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"sync"
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)
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func intToBytes(num int, buf []byte) []byte {
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for i := 0; i < len(buf); i++ {
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buf[i] = byte(num & 0xff)
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num = num >> 8
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}
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return buf
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}
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func uintToBytes(num uint, buf []byte) []byte {
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for i := 0; i < len(buf); i++ {
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buf[i] = byte(num & 0xff)
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num = num >> 8
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}
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return buf
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}
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func stringNullToBytes(a string) []byte {
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ret := []byte(a)
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ret = append(ret, byte(0))
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return ret
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}
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func bytesToUint(buf []byte) uint {
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var a uint
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var i uint
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for _, b := range buf {
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a += uint(b) << i
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i += 8
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}
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return a
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}
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func bytesToUint64(buf []byte) uint64 {
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var a uint64
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var i uint
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for _, b := range buf {
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a += uint64(b) << i
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i += 8
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}
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return a
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}
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type tBytesToUuidCache struct {
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mutex sync.RWMutex
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bs []byte
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uuid string
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}
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var bytesToUuidCache tBytesToUuidCache
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func bytesToUuid(buf []byte) (ret string) {
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bytesToUuidCache.mutex.RLock()
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if 0 == bytes.Compare(buf, bytesToUuidCache.bs) {
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bytesToUuidCache.mutex.RUnlock()
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return bytesToUuidCache.uuid
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}
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bytesToUuidCache.mutex.RUnlock()
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uuid := strings.ToUpper(hex.EncodeToString(buf))
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bytesToUuidCache.mutex.Lock()
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bytesToUuidCache.bs = make([]byte, len(buf))
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copy(bytesToUuidCache.bs, buf)
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bytesToUuidCache.uuid = uuid
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bytesToUuidCache.mutex.Unlock()
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return uuid
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}
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