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// ZHandler.cpp
#include "StdAfx.h"
#include "ZHandler.h"
#include "Common/Defs.h"
#include "../../Common/ProgressUtils.h"
#include "../../Compress/Z/ZDecoder.h"
#include "../../Common/StreamUtils.h"
#include "Windows/PropVariant.h"
#include "Windows/Defs.h"
#include "Common/ComTry.h"
#include "../Common/DummyOutStream.h"
namespace NArchive {
namespace NZ {
STATPROPSTG kProperties[] =
{
{ NULL, kpidPath, VT_BSTR},
{ NULL, kpidPackedSize, VT_UI8},
};
STDMETHODIMP CHandler::GetArchiveProperty(PROPID /* propID */, PROPVARIANT *value)
{
value->vt = VT_EMPTY;
return S_OK;
}
STDMETHODIMP CHandler::GetNumberOfProperties(UInt32 *numProperties)
{
*numProperties = sizeof(kProperties) / sizeof(kProperties[0]);
return S_OK;
}
STDMETHODIMP CHandler::GetPropertyInfo(UInt32 index,
BSTR *name, PROPID *propID, VARTYPE *varType)
{
if(index >= sizeof(kProperties) / sizeof(kProperties[0]))
return E_INVALIDARG;
const STATPROPSTG &srcItem = kProperties[index];
*propID = srcItem.propid;
*varType = srcItem.vt;
*name = 0;
return S_OK;
}
STDMETHODIMP CHandler::GetNumberOfArchiveProperties(UInt32 *numProperties)
{
*numProperties = 0;
return S_OK;
}
STDMETHODIMP CHandler::GetArchivePropertyInfo(UInt32 /* index */,
BSTR * /* name */, PROPID * /* propID */, VARTYPE * /* varType */)
{
return E_INVALIDARG;
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = 1;
return S_OK;
}
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NWindows::NCOM::CPropVariant propVariant;
if (index != 0)
return E_INVALIDARG;
switch(propID)
{
case kpidIsFolder:
propVariant = false;
break;
case kpidPackedSize:
propVariant = _packSize;
break;
}
propVariant.Detach(value);
return S_OK;
COM_TRY_END
}
static const int kSignatureSize = 3;
STDMETHODIMP CHandler::Open(IInStream *stream,
const UInt64 * /* maxCheckStartPosition */,
IArchiveOpenCallback * /* openArchiveCallback */)
{
COM_TRY_BEGIN
try
{
RINOK(stream->Seek(0, STREAM_SEEK_CUR, &_streamStartPosition));
Byte buffer[kSignatureSize];
UInt32 processedSize;
RINOK(ReadStream(stream, buffer, kSignatureSize, &processedSize));
if (processedSize != kSignatureSize)
return S_FALSE;
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;
}
catch(...)
{
return S_FALSE;
}
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;
askMode = testMode ? NArchive::NExtract::NAskMode::kTest :
NArchive::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->Init(realOutStream);
realOutStream.Release();
CLocalProgress *localProgressSpec = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = localProgressSpec;
localProgressSpec->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 = NArchive::NExtract::NOperationResult::kUnSupportedMethod;
else
{
result = decoder->Code(_stream, outStream, NULL, NULL, progress);
outStream.Release();
if (result == S_FALSE)
opResult = NArchive::NExtract::NOperationResult::kDataError;
else if (result == S_OK)
opResult = NArchive::NExtract::NOperationResult::kOK;
else
return result;
}
RINOK(extractCallback->SetOperationResult(opResult));
return S_OK;
COM_TRY_END
}
}}
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