97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: STREAMS.CXX
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//
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// Contents: CStream functions needed for IDSMgr, Filter, and OFS.
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//
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// Classes: CStreamA, CStreamW, and CStreamASCIIStr
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//
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// History: 16-Dec-92 AmyA Created from streams.hxx
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <streams.hxx>
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//+---------------------------------------------------------------------------
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//
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// Member: CStreamA::GetBuf, public
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//
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// Synopsis: Refills the buffer by calling the virtual function FillBuf,
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// then if the buffer was not filled, returns EOF, otherwise
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// returns the first char in buffer and increments _pCur.
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//
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// History: 15-Dec-92 AmyA Created
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//
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//----------------------------------------------------------------------------
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EXPORTIMP int APINOT
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CStreamA::GetBuf()
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{
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if ( !FillBuf() )
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{
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_eof = TRUE;
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return EOF;
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}
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return *_pCur++;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStreamW::GetBuf, public
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//
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// Synopsis: Refills the buffer by calling the virtual function FillBuf,
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// then if the buffer was not filled, returns EOF, otherwise
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// returns the first wchar in buffer and increments _pCur.
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//
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// History: 15-Dec-92 AmyA Created
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//
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//----------------------------------------------------------------------------
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EXPORTIMP int APINOT
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CStreamW::GetBuf()
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{
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if ( !FillBuf() )
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{
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_eof = TRUE;
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return EOF;
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}
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return *_pCur++;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStreamASCIIStr::Read, public
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//
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// Synopsis: Copies chars from the buffer into dest and returns the number
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// of chars copied.
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//
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// Arguments: [dest] -- buffer to copy chars into
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// [size] -- size of the buffer (max # of chars to copy)
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//
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// History: 04-Aug-92 MikeHew Modified for new streams
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// 22-Sep-92 AmyA Rewrote for non-NULL term. strings
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//
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//----------------------------------------------------------------------------
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EXPORTIMP unsigned APINOT
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CStreamASCIIStr::Read( void* dest, unsigned size )
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{
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if ( Eof() )
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return 0;
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unsigned count = (unsigned)(_pEnd-_pCur);
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if ( size < count )
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count = size;
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memcpy ( dest, _pCur, count );
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_pCur += count;
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return count;
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}
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