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// StreamUtils.cpp
#include "StdAfx.h"
#include "StreamUtils.h"
static const UInt32 kBlockSize = ((UInt32)1 << 31);
HRESULT ReadStream(ISequentialInStream *stream, void *data, size_t *processedSize) throw()
{
size_t size = *processedSize;
*processedSize = 0;
while (size != 0)
{
UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize;
UInt32 processedSizeLoc;
HRESULT res = stream->Read(data, curSize, &processedSizeLoc);
*processedSize += processedSizeLoc;
data = (void *)((Byte *)data + processedSizeLoc);
size -= processedSizeLoc;
RINOK(res);
if (processedSizeLoc == 0)
return S_OK;
}
return S_OK;
}
HRESULT ReadStream_FALSE(ISequentialInStream *stream, void *data, size_t size) throw()
{
size_t processedSize = size;
RINOK(ReadStream(stream, data, &processedSize));
return (size == processedSize) ? S_OK : S_FALSE;
}
HRESULT ReadStream_FAIL(ISequentialInStream *stream, void *data, size_t size) throw()
{
size_t processedSize = size;
RINOK(ReadStream(stream, data, &processedSize));
return (size == processedSize) ? S_OK : E_FAIL;
}
HRESULT WriteStream(ISequentialOutStream *stream, const void *data, size_t size) throw()
{
while (size != 0)
{
UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize;
UInt32 processedSizeLoc;
HRESULT res = stream->Write(data, curSize, &processedSizeLoc);
data = (const void *)((const Byte *)data + processedSizeLoc);
size -= processedSizeLoc;
RINOK(res);
if (processedSizeLoc == 0)
return E_FAIL;
}
return S_OK;
}
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