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// NsisDecode.cpp
#include "StdAfx.h"
#include "NsisDecode.h"
#include "../../Common/StreamUtils.h"
#include "../7z/7zMethods.h"
namespace NArchive {
namespace NNsis {
static const N7z::CMethodID k_Copy = { { 0x0 }, 1 };
static const N7z::CMethodID k_Deflate = { { 0x4, 0x9, 0x1 }, 3 };
static const N7z::CMethodID k_BZip2 = { { 0x4, 0x9, 0x2 }, 3 };
static const N7z::CMethodID k_LZMA = { { 0x3, 0x1, 0x1 }, 3 };
static const N7z::CMethodID k_BCJ_X86 = { { 0x3, 0x3, 0x1, 0x3 }, 4 };
CDecoder::CDecoder()
{
N7z::LoadMethodMap();
}
HRESULT CDecoder::Init(IInStream *inStream, NMethodType::EEnum method, bool thereIsFilterFlag, bool &useFilter)
{
useFilter = false;
CObjectVector< CMyComPtr<ISequentialInStream> > inStreams;
if (_decoderInStream)
if (method != _method)
Release();
_method = method;
if (!_codecInStream)
{
const NArchive::N7z::CMethodID *methodID = 0;
switch (method)
{
case NMethodType::kCopy:
methodID = &k_Copy;
break;
case NMethodType::kDeflate:
methodID = &k_Deflate;
break;
case NMethodType::kBZip2:
methodID = &k_BZip2;
break;
case NMethodType::kLZMA:
methodID = &k_LZMA;
break;
default:
return E_NOTIMPL;
}
N7z::CMethodInfo methodInfo;
if (!N7z::GetMethodInfo(*methodID, methodInfo))
return E_NOTIMPL;
CMyComPtr<ICompressCoder> coder;
RINOK(_libraries.CreateCoder(methodInfo.FilePath, methodInfo.Decoder, &coder));
coder.QueryInterface(IID_ISequentialInStream, &_codecInStream);
if (!_codecInStream)
return E_NOTIMPL;
}
if (thereIsFilterFlag)
{
UInt32 processedSize;
BYTE flag;
RINOK(inStream->Read(&flag, 1, &processedSize));
if (processedSize != 1)
return E_FAIL;
if (flag > 1)
return E_NOTIMPL;
useFilter = (flag != 0);
}
if (useFilter)
{
if (!_filterInStream)
{
N7z::CMethodInfo methodInfo;
if (!N7z::GetMethodInfo(k_BCJ_X86, methodInfo))
return E_NOTIMPL;
CMyComPtr<ICompressCoder> coder;
RINOK(_libraries.CreateCoderSpec(methodInfo.FilePath, methodInfo.Decoder, &coder));
coder.QueryInterface(IID_ISequentialInStream, &_filterInStream);
if (!_filterInStream)
return E_NOTIMPL;
}
CMyComPtr<ICompressSetInStream> setInStream;
_filterInStream.QueryInterface(IID_ICompressSetInStream, &setInStream);
if (!setInStream)
return E_NOTIMPL;
RINOK(setInStream->SetInStream(_codecInStream));
_decoderInStream = _filterInStream;
}
else
_decoderInStream = _codecInStream;
if (method == NMethodType::kLZMA)
{
CMyComPtr<ICompressSetDecoderProperties2> setDecoderProperties;
_codecInStream.QueryInterface(IID_ICompressSetDecoderProperties2, &setDecoderProperties);
if (setDecoderProperties)
{
static const UInt32 kPropertiesSize = 5;
BYTE properties[kPropertiesSize];
UInt32 processedSize;
RINOK(inStream->Read(properties, kPropertiesSize, &processedSize));
if (processedSize != kPropertiesSize)
return E_FAIL;
RINOK(setDecoderProperties->SetDecoderProperties2((const Byte *)properties, kPropertiesSize));
}
}
{
CMyComPtr<ICompressSetInStream> setInStream;
_codecInStream.QueryInterface(IID_ICompressSetInStream, &setInStream);
if (!setInStream)
return E_NOTIMPL;
RINOK(setInStream->SetInStream(inStream));
}
{
CMyComPtr<ICompressSetOutStreamSize> setOutStreamSize;
_codecInStream.QueryInterface(IID_ICompressSetOutStreamSize, &setOutStreamSize);
if (!setOutStreamSize)
return E_NOTIMPL;
RINOK(setOutStreamSize->SetOutStreamSize(NULL));
}
if (useFilter)
{
/*
CMyComPtr<ICompressSetOutStreamSize> setOutStreamSize;
_filterInStream.QueryInterface(IID_ICompressSetOutStreamSize, &setOutStreamSize);
if (!setOutStreamSize)
return E_NOTIMPL;
RINOK(setOutStreamSize->SetOutStreamSize(NULL));
*/
}
return S_OK;
}
HRESULT CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
return ReadStream(_decoderInStream, data, size, processedSize);;
}
}}
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