1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/win32/7zip/7z/CPP/7zip/Archive/Common/InStreamWithCRC.cpp	Sat Mar 03 10:31:27 2012 -0600
     1.3 @@ -0,0 +1,40 @@
     1.4 +// InStreamWithCRC.cpp
     1.5 +
     1.6 +#include "StdAfx.h"
     1.7 +
     1.8 +#include "InStreamWithCRC.h"
     1.9 +
    1.10 +STDMETHODIMP CSequentialInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
    1.11 +{
    1.12 +  UInt32 realProcessedSize;
    1.13 +  HRESULT result = _stream->Read(data, size, &realProcessedSize);
    1.14 +  _size += realProcessedSize;
    1.15 +  if (size > 0 && realProcessedSize == 0)
    1.16 +    _wasFinished = true;
    1.17 +  _crc = CrcUpdate(_crc, data, realProcessedSize);
    1.18 +  if(processedSize != NULL)
    1.19 +    *processedSize = realProcessedSize;
    1.20 +  return result;
    1.21 +}
    1.22 +
    1.23 +STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
    1.24 +{
    1.25 +  UInt32 realProcessedSize;
    1.26 +  HRESULT result = _stream->Read(data, size, &realProcessedSize);
    1.27 +  if (size > 0 && realProcessedSize == 0)
    1.28 +    _wasFinished = true;
    1.29 +  _size += realProcessedSize;
    1.30 +  _crc = CrcUpdate(_crc, data, realProcessedSize);
    1.31 +  if(processedSize != NULL)
    1.32 +    *processedSize = realProcessedSize;
    1.33 +  return result;
    1.34 +}
    1.35 +
    1.36 +STDMETHODIMP CInStreamWithCRC::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
    1.37 +{
    1.38 +  if (seekOrigin != STREAM_SEEK_SET || offset != 0)
    1.39 +    return E_FAIL;
    1.40 +  _size = 0;
    1.41 +  _crc = CRC_INIT_VAL;
    1.42 +  return _stream->Seek(offset, seekOrigin, newPosition);
    1.43 +}