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// CabCopyDecoder.cpp
#include "StdAfx.h"
#include "CabCopyDecoder.h"
#include "Common/Defs.h"
#include "Windows/Defs.h"
namespace NArchive {
namespace NCab {
static const UInt32 kBufferSize = 1 << 17;
void CCopyDecoder::ReleaseStreams()
{
m_InStream.ReleaseStream();
m_OutStream.ReleaseStream();
}
class CCopyDecoderFlusher
{
CCopyDecoder *m_Decoder;
public:
CCopyDecoderFlusher(CCopyDecoder *decoder): m_Decoder(decoder) {}
~CCopyDecoderFlusher()
{
m_Decoder->Flush();
m_Decoder->ReleaseStreams();
}
};
STDMETHODIMP CCopyDecoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream,
const UInt64 *inSize, const UInt64 *outSize,
ICompressProgressInfo *progress)
{
if (outSize == NULL)
return E_INVALIDARG;
UInt64 size = *outSize;
if (!m_OutStream.Create(1 << 20))
return E_OUTOFMEMORY;
if (!m_InStream.Create(1 << 20))
return E_OUTOFMEMORY;
m_InStream.SetStream(inStream);
m_InStream.Init(m_ReservedSize, m_NumInDataBlocks);
m_OutStream.SetStream(outStream);
m_OutStream.Init();
CCopyDecoderFlusher decoderFlusher(this);
UInt64 nowPos64 = 0;
while(nowPos64 < size)
{
UInt32 blockSize;
bool dataAreCorrect;
RINOK(m_InStream.ReadBlock(blockSize, dataAreCorrect));
if (!dataAreCorrect)
{
throw 123456;
}
for (UInt32 i = 0; i < blockSize; i++)
m_OutStream.WriteByte(m_InStream.ReadByte());
nowPos64 += blockSize;
if (progress != NULL)
{
RINOK(progress->SetRatioInfo(&nowPos64, &nowPos64));
}
}
return S_OK;
}
}}
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