public static byte[] BuildPrimaryKeyWithHeader(PrimaryKey primaryKey) { int size = ComputePrimaryKeyWithHeader(primaryKey); PlainBufferOutputStream output = new PlainBufferOutputStream(size); output.WriteRawLittleEndian32(PlainBufferConsts.HEADER); output.WriteRawByte(PlainBufferConsts.TAG_ROW_PK); byte rowChecksum = (byte)0x0, cellChecksum; foreach (var key in primaryKey) { var column = new Column(key.Key, key.Value); cellChecksum = PlainBufferCrc8.crc8((byte)0x0, column.GetNameRawData()); cellChecksum = column.Value.GetChecksum(cellChecksum); WritePrimaryKeyColumn(column, output, cellChecksum); rowChecksum = PlainBufferCrc8.crc8(rowChecksum, cellChecksum); } // 没有deleteMarker, 要与0x0做crc. rowChecksum = PlainBufferCrc8.crc8(rowChecksum, (byte)0x0); output.WriteRawByte(PlainBufferConsts.TAG_ROW_CHECKSUM); output.WriteRawByte(rowChecksum); if (!output.IsFull()) { throw new IOException("Bug: serialize primary key failed."); } return(output.GetBuffer()); }
public static void WritePrimaryKeyColumn(Column column, PlainBufferOutputStream output, byte checksum) { output.WriteRawByte(PlainBufferConsts.TAG_CELL); output.WriteRawByte(PlainBufferConsts.TAG_CELL_NAME); byte[] rawData = column.GetNameRawData(); output.WriteRawLittleEndian32(rawData.Length); output.WriteBytes(rawData); output.WriteRawByte(PlainBufferConsts.TAG_CELL_VALUE); WritePrimaryKeyValue(column.Value, output); output.WriteRawByte(PlainBufferConsts.TAG_CELL_CHECKSUM); output.WriteRawByte(checksum); }
public static void WritePrimaryKeyValue(ColumnValue value, PlainBufferOutputStream output) { if (value.IsInfMin()) { output.WriteRawLittleEndian32(1); output.WriteRawByte(PlainBufferConsts.VT_INF_MIN); return; } if (value.IsInfMax()) { output.WriteRawLittleEndian32(1); output.WriteRawByte(PlainBufferConsts.VT_INF_MAX); return; } if (value.IsPlaceHolderForAutoIncr()) { output.WriteRawLittleEndian32(1); output.WriteRawByte(PlainBufferConsts.VT_AUTO_INCREMENT); return; } switch (value.Type) { case ColumnValueType.String: { byte[] rawData = value.AsStringInBytes(); int prefixLength = PlainBufferOutputStream.LITTLE_ENDIAN_32_SIZE + 1; // length + type + length output.WriteRawLittleEndian32(prefixLength + rawData.Length); // length + type + value output.WriteRawByte(PlainBufferConsts.VT_STRING); output.WriteRawLittleEndian32(rawData.Length); output.WriteBytes(rawData); break; } case ColumnValueType.Integer: { output.WriteRawLittleEndian32(1 + PlainBufferOutputStream.LITTLE_ENDIAN_64_SIZE); output.WriteRawByte(PlainBufferConsts.VT_INTEGER); output.WriteRawLittleEndian64(value.IntegerValue); break; } case ColumnValueType.Binary: { byte[] rawData = value.BinaryValue; int prefixLength = PlainBufferOutputStream.LITTLE_ENDIAN_32_SIZE + 1; // length + type + length output.WriteRawLittleEndian32(prefixLength + rawData.Length); // length + type + value output.WriteRawByte(PlainBufferConsts.VT_BLOB); output.WriteRawLittleEndian32(rawData.Length); output.WriteBytes(rawData); break; } default: throw new IOException("Bug: unsupported primary key type: " + value.GetType()); } }
public void WriteTag(byte tag) { output.WriteRawByte(tag); }