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// Compress/CopyCoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "CopyCoder.h"
namespace NCompress {
static const UInt32 kBufSize = 1 << 17;
CCopyCoder::~CCopyCoder()
{
::MidFree(_buf);
}
STDMETHODIMP CCopyCoder::SetFinishMode(UInt32 /* finishMode */)
{
return S_OK;
}
STDMETHODIMP CCopyCoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream,
const UInt64 * /* inSize */, const UInt64 *outSize,
ICompressProgressInfo *progress)
{
if (!_buf)
{
_buf = (Byte *)::MidAlloc(kBufSize);
if (!_buf)
return E_OUTOFMEMORY;
}
TotalSize = 0;
for (;;)
{
UInt32 size = kBufSize;
if (outSize && size > *outSize - TotalSize)
size = (UInt32)(*outSize - TotalSize);
if (size == 0)
return S_OK;
HRESULT readRes = inStream->Read(_buf, size, &size);
if (size == 0)
return readRes;
if (outStream)
{
UInt32 pos = 0;
do
{
UInt32 curSize = size - pos;
HRESULT res = outStream->Write(_buf + pos, curSize, &curSize);
pos += curSize;
TotalSize += curSize;
RINOK(res);
if (curSize == 0)
return E_FAIL;
}
while (pos < size);
}
else
TotalSize += size;
RINOK(readRes);
if (progress)
{
RINOK(progress->SetRatioInfo(&TotalSize, &TotalSize));
}
}
}
STDMETHODIMP CCopyCoder::SetInStream(ISequentialInStream *inStream)
{
_inStream = inStream;
TotalSize = 0;
return S_OK;
}
STDMETHODIMP CCopyCoder::ReleaseInStream()
{
_inStream.Release();
return S_OK;
}
STDMETHODIMP CCopyCoder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 realProcessedSize = 0;
HRESULT res = _inStream->Read(data, size, &realProcessedSize);
TotalSize += realProcessedSize;
if (processedSize)
*processedSize = realProcessedSize;
return res;
}
STDMETHODIMP CCopyCoder::GetInStreamProcessedSize(UInt64 *value)
{
*value = TotalSize;
return S_OK;
}
HRESULT CopyStream(ISequentialInStream *inStream, ISequentialOutStream *outStream, ICompressProgressInfo *progress)
{
CMyComPtr<ICompressCoder> copyCoder = new CCopyCoder;
return copyCoder->Code(inStream, outStream, NULL, NULL, progress);
}
HRESULT CopyStream_ExactSize(ISequentialInStream *inStream, ISequentialOutStream *outStream, UInt64 size, ICompressProgressInfo *progress)
{
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder;
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
RINOK(copyCoder->Code(inStream, outStream, NULL, &size, progress));
return copyCoderSpec->TotalSize == size ? S_OK : E_FAIL;
}
}
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