mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-08-22 12:38:06 +02:00
215 lines
4.9 KiB
Go
215 lines
4.9 KiB
Go
package nodb
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"strconv"
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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 FormatBinLogEvent(event []byte) (string, error) {
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logType := uint8(event[0])
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var err error
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var k []byte
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var v []byte
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var buf []byte = make([]byte, 0, 1024)
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switch logType {
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case BinLogTypePut:
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k, v, err = decodeBinLogPut(event)
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buf = append(buf, "PUT "...)
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case BinLogTypeDeletion:
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k, err = decodeBinLogDelete(event)
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buf = append(buf, "DELETE "...)
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default:
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err = errInvalidBinLogEvent
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}
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if err != nil {
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return "", err
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}
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if buf, err = formatDataKey(buf, k); err != nil {
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return "", err
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}
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if v != nil && len(v) != 0 {
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buf = append(buf, fmt.Sprintf(" %q", v)...)
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}
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return String(buf), nil
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}
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func formatDataKey(buf []byte, k []byte) ([]byte, error) {
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if len(k) < 2 {
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return nil, errInvalidBinLogEvent
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}
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buf = append(buf, fmt.Sprintf("DB:%2d ", k[0])...)
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buf = append(buf, fmt.Sprintf("%s ", TypeName[k[1]])...)
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db := new(DB)
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db.index = k[0]
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//to do format at respective place
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switch k[1] {
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case KVType:
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if key, err := db.decodeKVKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case HashType:
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if key, field, err := db.hDecodeHashKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(field))
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}
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case HSizeType:
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if key, err := db.hDecodeSizeKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case ListType:
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if key, seq, err := db.lDecodeListKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendInt(buf, int64(seq), 10)
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}
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case LMetaType:
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if key, err := db.lDecodeMetaKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case ZSetType:
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if key, m, err := db.zDecodeSetKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(m))
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}
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case ZSizeType:
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if key, err := db.zDecodeSizeKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case ZScoreType:
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if key, m, score, err := db.zDecodeScoreKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(m))
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buf = append(buf, ' ')
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buf = strconv.AppendInt(buf, score, 10)
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}
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case BitType:
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if key, seq, err := db.bDecodeBinKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendUint(buf, uint64(seq), 10)
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}
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case BitMetaType:
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if key, err := db.bDecodeMetaKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case SetType:
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if key, member, err := db.sDecodeSetKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(member))
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}
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case SSizeType:
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if key, err := db.sDecodeSizeKey(k); err != nil {
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return nil, err
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} else {
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buf = strconv.AppendQuote(buf, String(key))
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}
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case ExpTimeType:
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if tp, key, t, err := db.expDecodeTimeKey(k); err != nil {
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return nil, err
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} else {
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buf = append(buf, TypeName[tp]...)
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(key))
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buf = append(buf, ' ')
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buf = strconv.AppendInt(buf, t, 10)
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}
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case ExpMetaType:
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if tp, key, err := db.expDecodeMetaKey(k); err != nil {
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return nil, err
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} else {
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buf = append(buf, TypeName[tp]...)
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buf = append(buf, ' ')
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buf = strconv.AppendQuote(buf, String(key))
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}
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default:
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return nil, errInvalidBinLogEvent
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}
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return buf, nil
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}
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