cabblockinstream.h

来自「著名的7zip的压缩算法,压缩比最高,但是压缩时间也比较长!」· C头文件 代码 · 共 57 行

// CabBlockInStream.cpp

#ifndef __CABBLOCKINSTREAM_H
#define __CABBLOCKINSTREAM_H

#include "Common/MyCom.h"
#include "../../IStream.h"

namespace NArchive {
namespace NCab {

class CCabBlockInStream: 
  public ISequentialInStream,
  public CMyUnknownImp
{
  CMyComPtr<ISequentialInStream> _stream;
  Byte *_buffer;
  UInt32 _pos;
  UInt32 _size;
  int _align;

public:
  UInt32 TotalPackSize;
  UInt32 ReservedSize;
  bool DataError;
  bool MsZip;

  CCabBlockInStream(): _buffer(0), ReservedSize(0), MsZip(false), DataError(false), _align(0), TotalPackSize(0) {}
  ~CCabBlockInStream();
  bool Create();
  void SetStream(ISequentialInStream *stream) {  _stream = stream; }

  void InitForNewFolder()
  {
    _align = 0;
    TotalPackSize = 0;
  }
  
  void InitForNewBlock()
  {
    _size = 0;
    _align = (_align + (int)TotalPackSize) & 1;
  }

  int GetAlign() const { return _align; }

  MY_UNKNOWN_IMP

  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);

  HRESULT PreRead(UInt32 &packSize, UInt32 &unpackSize);
};

}}

#endif