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// 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/Z/ZDecoder.h"
#include "Common/DummyOutStream.h"
namespace NArchive {
namespace NZ {
class CHandler:
public IInArchive,
public CMyUnknownImp
{
public:
MY_UNKNOWN_IMP1(IInArchive)
INTERFACE_IInArchive(;)
private:
CMyComPtr<IInStream> _stream;
UInt64 _streamStartPosition;
UInt64 _packSize;
Byte _properties;
};
static IInArchive *CreateArc() { return new CHandler; }
static CArcInfo g_ArcInfo =
{ L"Z", L"z taz", L"* .tar", 5, { 0x1F, 0x9D }, 2, false, CreateArc, 0 };
REGISTER_ARC(Z)
STATPROPSTG kProps[] =
{
{ NULL, kpidPackSize, VT_UI8}
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps_NO
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = 1;
return S_OK;
}
STDMETHODIMP CHandler::GetProperty(UInt32 /* index */, PROPID propID, PROPVARIANT *value)
{
NWindows::NCOM::CPropVariant prop;
switch(propID)
{
case kpidPackSize: prop = _packSize; break;
}
prop.Detach(value);
return S_OK;
}
static const int kSignatureSize = 3;
STDMETHODIMP CHandler::Open(IInStream *stream,
const UInt64 * /* maxCheckStartPosition */,
IArchiveOpenCallback * /* openArchiveCallback */)
{
COM_TRY_BEGIN
{
RINOK(stream->Seek(0, STREAM_SEEK_CUR, &_streamStartPosition));
Byte buffer[kSignatureSize];
RINOK(ReadStream_FALSE(stream, buffer, kSignatureSize));
if (buffer[0] != 0x1F || buffer[1] != 0x9D)
return S_FALSE;
_properties = buffer[2];
UInt64 endPosition;
RINOK(stream->Seek(0, STREAM_SEEK_END, &endPosition));
_packSize = endPosition - _streamStartPosition - kSignatureSize;
_stream = stream;
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
_stream.Release();
return S_OK;
}
STDMETHODIMP CHandler::Extract(const UInt32* indices, UInt32 numItems,
Int32 testModeSpec, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool allFilesMode = (numItems == (UInt32)(-1));
if (!allFilesMode)
{
if (numItems == 0)
return S_OK;
if (numItems != 1)
return E_INVALIDARG;
if (indices[0] != 0)
return E_INVALIDARG;
}
bool testMode = (testModeSpec != 0);
extractCallback->SetTotal(_packSize);
UInt64 currentTotalPacked = 0;
RINOK(extractCallback->SetCompleted(¤tTotalPacked));
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(_streamStartPosition + kSignatureSize, STREAM_SEEK_SET, NULL));
CMyComPtr<ICompressCoder> decoder;
NCompress::NZ::CDecoder *decoderSpec = new NCompress::NZ::CDecoder;
decoder = decoderSpec;
HRESULT result = decoderSpec->SetDecoderProperties2(&_properties, 1);
int opResult;
if (result != S_OK)
opResult = NExtract::NOperationResult::kUnSupportedMethod;
else
{
result = decoder->Code(_stream, outStream, NULL, NULL, progress);
if (result == S_FALSE)
opResult = NExtract::NOperationResult::kDataError;
else
{
RINOK(result);
opResult = NExtract::NOperationResult::kOK;
}
}
outStream.Release();
return extractCallback->SetOperationResult(opResult);
COM_TRY_END
}
}}
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