p7zip/CPP/7zip/Archive/ZHandler.cpp

// ZHandler.cpp

#include "StdAfx.h"

#include "../../Common/ComTry.h"

#include "../../Windows/PropVariant.h"

#include "../Common/ProgressUtils.h"
#include "../Common/RegisterArc.h"
#include "../Common/StreamUtils.h"

#include "../Compress/ZDecoder.h"

#include "Common/DummyOutStream.h"

namespace NArchive {
namespace NZ {

class CHandler:
  public IInArchive,
  public CMyUnknownImp
{
  CMyComPtr<IInStream> _stream;
  UInt64 _packSize;
  // UInt64 _unpackSize;
  // bool _unpackSize_Defined;
public:
  MY_UNKNOWN_IMP1(IInArchive)
  INTERFACE_IInArchive(;)
};

static const Byte kProps[] =
{
  kpidPackSize
};

IMP_IInArchive_Props
IMP_IInArchive_ArcProps_NO_Table

STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
  *numItems = 1;
  return S_OK;
}

STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
  NWindows::NCOM::CPropVariant prop;
  switch (propID)
  {
    case kpidPhySizeCantBeDetected: prop = true; break;
  }
  prop.Detach(value);
  return S_OK;
}

STDMETHODIMP CHandler::GetProperty(UInt32 /* index */, PROPID propID, PROPVARIANT *value)
{
  NWindows::NCOM::CPropVariant prop;
  switch (propID)
  {
    // case kpidSize: if (_unpackSize_Defined) prop = _unpackSize; break;
    case kpidPackSize: prop = _packSize; break;
  }
  prop.Detach(value);
  return S_OK;
}

/*
class CCompressProgressInfoImp:
  public ICompressProgressInfo,
  public CMyUnknownImp
{
  CMyComPtr<IArchiveOpenCallback> Callback;
public:
  MY_UNKNOWN_IMP1(ICompressProgressInfo)
  STDMETHOD(SetRatioInfo)(const UInt64 *inSize, const UInt64 *outSize);
  void Init(IArchiveOpenCallback *callback) { Callback = callback; }
};

STDMETHODIMP CCompressProgressInfoImp::SetRatioInfo(const UInt64 *inSize, const UInt64 *outSize)
{
  if (Callback)
  {
    UInt64 files = 1;
    return Callback->SetCompleted(&files, inSize);
  }
  return S_OK;
}
*/

API_FUNC_static_IsArc IsArc_Z(const Byte *p, size_t size)
{
  if (size < 3)
    return k_IsArc_Res_NEED_MORE;
  if (size > NCompress::NZ::kRecommendedCheckSize)
    size = NCompress::NZ::kRecommendedCheckSize;
  if (!NCompress::NZ::CheckStream(p, size))
    return k_IsArc_Res_NO;
  return k_IsArc_Res_YES;
}
}

STDMETHODIMP CHandler::Open(IInStream *stream,
    const UInt64 * /* maxCheckStartPosition */,
    IArchiveOpenCallback * /* openCallback */)
{
  COM_TRY_BEGIN
  {
    // RINOK(stream->Seek(0, STREAM_SEEK_CUR, &_streamStartPosition));
    Byte buffer[NCompress::NZ::kRecommendedCheckSize];
    // Byte buffer[1500];
    size_t size = NCompress::NZ::kRecommendedCheckSize;
    // size = 700;
    RINOK(ReadStream(stream, buffer, &size));
    if (!NCompress::NZ::CheckStream(buffer, size))
      return S_FALSE;

    UInt64 endPos;
    RINOK(stream->Seek(0, STREAM_SEEK_END, &endPos));
    _packSize = endPos;
  
    /*
    bool fullCheck = false;
    if (fullCheck)
    {
      CCompressProgressInfoImp *compressProgressSpec = new CCompressProgressInfoImp;
      CMyComPtr<ICompressProgressInfo> compressProgress = compressProgressSpec;
      compressProgressSpec->Init(openCallback);

      NCompress::NZ::CDecoder *decoderSpec = new NCompress::NZ::CDecoder;
      CMyComPtr<ICompressCoder> decoder = decoderSpec;

      CDummyOutStream *outStreamSpec = new CDummyOutStream;
      CMyComPtr<ISequentialOutStream> outStream(outStreamSpec);
      outStreamSpec->SetStream(NULL);
      outStreamSpec->Init();
      decoderSpec->SetProp(_prop);
      if (openCallback)
      {
        UInt64 files = 1;
        RINOK(openCallback->SetTotal(&files, &endPos));
      }
      RINOK(stream->Seek(_streamStartPosition + kSignatureSize, STREAM_SEEK_SET, NULL));
      HRESULT res = decoder->Code(stream, outStream, NULL, NULL, openCallback ? compressProgress : NULL);
      if (res != S_OK)
        return S_FALSE;
      _packSize = decoderSpec->PackSize;
    }
    */
    _stream = stream;
  }
  return S_OK;
  COM_TRY_END
}

STDMETHODIMP CHandler::Close()
{
  _packSize = 0;
  // _unpackSize_Defined = false;
  _stream.Release();
  return S_OK;
}


STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
    Int32 testMode, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  if (numItems == 0)
    return S_OK;
  if (numItems != (UInt32)(Int32)-1 && (numItems != 1 || indices[0] != 0))
    return E_INVALIDARG;

  extractCallback->SetTotal(_packSize);

  UInt64 currentTotalPacked = 0;
  
  RINOK(extractCallback->SetCompleted(&currentTotalPacked));
  
  CMyComPtr<ISequentialOutStream> realOutStream;
  Int32 askMode = testMode ?
      NExtract::NAskMode::kTest :
      NExtract::NAskMode::kExtract;
  
  RINOK(extractCallback->GetStream(0, &realOutStream, askMode));
    
  if (!testMode && !realOutStream)
    return S_OK;

  extractCallback->PrepareOperation(askMode);

  CDummyOutStream *outStreamSpec = new CDummyOutStream;
  CMyComPtr<ISequentialOutStream> outStream(outStreamSpec);
  outStreamSpec->SetStream(realOutStream);
  outStreamSpec->Init();
  realOutStream.Release();

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(extractCallback, true);
  
  RINOK(_stream->Seek(0, STREAM_SEEK_SET, NULL));

  NCompress::NZ::CDecoder *decoderSpec = new NCompress::NZ::CDecoder;
  CMyComPtr<ICompressCoder> decoder = decoderSpec;

  int opRes;
  {
    HRESULT result = decoder->Code(_stream, outStream, NULL, NULL, progress);
    if (result == S_FALSE)
      opRes = NExtract::NOperationResult::kDataError;
    else
    {
      RINOK(result);
      opRes = NExtract::NOperationResult::kOK;
    }
  }
  // _unpackSize = outStreamSpec->GetSize();
  // _unpackSize_Defined = true;
  outStream.Release();
  return extractCallback->SetOperationResult(opRes);
  COM_TRY_END
}

static const Byte k_Signature[] = { 0x1F, 0x9D };

REGISTER_ARC_I(
  "Z", "z taz", "* .tar", 5,
  k_Signature,
  0,
  0,
  IsArc_Z)

}}