1// OutStreamWithCRC.h
2
3#ifndef __OUT_STREAM_WITH_CRC_H
4#define __OUT_STREAM_WITH_CRC_H
5
6#include "../../../../C/7zCrc.h"
7
8#include "../../../Common/MyCom.h"
9
10#include "../../IStream.h"
11
12class COutStreamWithCRC:
13  public ISequentialOutStream,
14  public CMyUnknownImp
15{
16  CMyComPtr<ISequentialOutStream> _stream;
17  UInt64 _size;
18  UInt32 _crc;
19  bool _calculate;
20public:
21  MY_UNKNOWN_IMP
22  STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
23  void SetStream(ISequentialOutStream *stream) { _stream = stream; }
24  void ReleaseStream() { _stream.Release(); }
25  void Init(bool calculate = true)
26  {
27    _size = 0;
28    _calculate = calculate;
29    _crc = CRC_INIT_VAL;
30  }
31  void InitCRC() { _crc = CRC_INIT_VAL; }
32  UInt64 GetSize() const { return _size; }
33  UInt32 GetCRC() const { return CRC_GET_DIGEST(_crc); }
34};
35
36#endif
37