func EncodeDataKeyPrefix(db uint32, key []byte) []byte {
if len(key) == 0 {
log.Errorf("encode nil data key")
}
w := NewBufWriter(nil)
encodeRawBytes(w, DataCode, &db, &key)
return w.Bytes()
}
func EncodeMetaKey(db uint32, key []byte) []byte {
if len(key) == 0 {
log.Errorf("encode nil meta key")
}
tag, slot := HashKeyToSlot(key)
if len(tag) == len(key) {
key = nil
}
w := NewBufWriter(nil)
encodeRawBytes(w, MetaCode, &db, &slot, &tag, &key)
return w.Bytes()
}
func DecodeMetaKey(p []byte) (db uint32, key []byte, err error) {
var tag []byte
var slot uint32
r := NewBufReader(p)
err = decodeRawBytes(r, err, MetaCode, &db, &slot, &tag, &key)
err = decodeRawBytes(r, err)
if err != nil {
return
}
if len(key) == 0 {
key = tag
}
if len(key) == 0 {
log.Errorf("decode nil meta key")
}
return
}