mirror of https://github.com/ledisdb/ledisdb.git
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package ledis
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import (
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"encoding/binary"
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"errors"
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)
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var (
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errBinLogDeleteType = errors.New("invalid bin log delete type")
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errBinLogPutType = errors.New("invalid bin log put type")
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errBinLogCommandType = errors.New("invalid bin log command type")
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)
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func encodeBinLogDelete(key []byte) []byte {
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buf := make([]byte, 1+len(key))
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buf[0] = BinLogTypeDeletion
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copy(buf[1:], key)
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return buf
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}
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func decodeBinLogDelete(sz []byte) ([]byte, error) {
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if len(sz) < 1 || sz[0] != BinLogTypeDeletion {
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return nil, errBinLogDeleteType
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}
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return sz[1:], nil
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}
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func encodeBinLogPut(key []byte, value []byte) []byte {
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buf := make([]byte, 3+len(key)+len(value))
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buf[0] = BinLogTypePut
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pos := 1
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binary.BigEndian.PutUint16(buf[pos:], uint16(len(key)))
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pos += 2
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copy(buf[pos:], key)
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pos += len(key)
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copy(buf[pos:], value)
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return buf
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}
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func decodeBinLogPut(sz []byte) ([]byte, []byte, error) {
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if len(sz) < 3 || sz[0] != BinLogTypePut {
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return nil, nil, errBinLogPutType
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}
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keyLen := int(binary.BigEndian.Uint16(sz[1:]))
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if 3+keyLen > len(sz) {
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return nil, nil, errBinLogPutType
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}
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return sz[3 : 3+keyLen], sz[3+keyLen:], nil
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}
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func encodeBinLogCommand(commandType uint8, args ...[]byte) []byte {
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//to do
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return nil
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}
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func decodeBinLogCommand(sz []byte) (uint8, [][]byte, error) {
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return 0, nil, errBinLogCommandType
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}
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