michael@0: // LimitedStreams.cpp
michael@0: 
michael@0: #include "StdAfx.h"
michael@0: 
michael@0: #include "LimitedStreams.h"
michael@0: #include "../../Common/Defs.h"
michael@0: 
michael@0: void CLimitedSequentialInStream::Init(ISequentialInStream *stream, UInt64 streamSize)
michael@0: {
michael@0:   _stream = stream;
michael@0:   _size = streamSize;
michael@0: }
michael@0: 
michael@0: STDMETHODIMP CLimitedSequentialInStream::Read(void *data, UInt32 size, UInt32 *processedSize)
michael@0: {
michael@0:   UInt32 processedSizeReal;
michael@0:   UInt32 sizeToRead = UInt32(MyMin(_size, UInt64(size)));
michael@0:   HRESULT result = _stream->Read(data, sizeToRead, &processedSizeReal);
michael@0:   _size -= processedSizeReal;
michael@0:   if(processedSize != NULL)
michael@0:     *processedSize = processedSizeReal;
michael@0:   return result;
michael@0: }
michael@0: