76 lines
2 KiB
C++
76 lines
2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1992 - 1994, Microsoft Corporation.
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//
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// File: fstrm.cxx
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//
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// Contents: Stream for transporting text from IFilter to cxx parser.
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//
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// Classes: CFilterTextStream
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//
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// History: 01-Aug-93 AmyA Created
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// 17-Oct-94 BartoszM Rewrote
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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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//+-------------------------------------------------------------------------
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//
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// Member: CFilterTextStream::CFilterTextStream, public
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//
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// Synopsis: Constructor
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//
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// History: 01-Aug-93 AmyA Created
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// 17-Oct-94 BartoszM Rewrote
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//
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//--------------------------------------------------------------------------
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CFilterTextStream::CFilterTextStream(IFilter* pIFilter)
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: CTextSource(_statChunk)
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{
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iEnd = 0;
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iCur = 0;
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Win4Assert (pIFilter != 0);
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awcBuffer = _awcFilterBuffer;
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_sc = pIFilter->GetChunk( &_statChunk );
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if (SUCCEEDED(_sc))
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{
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_pFilter = pIFilter;
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pfnFillTextBuffer = CTextSource::FillBuf;
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_mapper.NewChunk ( _statChunk.idChunk, 0 );
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_pMapper = &_mapper;
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_sc = CTextSource::FillBuf( this );
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CFilterTextStream::GetMore, public
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//
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// Synopsis: Try to replenish the buffer
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//
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// History: 16-Nov-94 BartoszM Created
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//
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//----------------------------------------------------------------------------
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int CFilterTextStream::GetMore()
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{
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if (iCur == iEnd - 1)
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{
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_sc = FillBuf( this );
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// if there was no more data
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// the last lookahead was moved
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// to the beginning and
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// iCur == iEnd - 1
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// next time around it will be
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// iCur == iEnd
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}
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else
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{
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Win4Assert(iCur == iEnd);
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return -1; // EOF
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}
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return awcBuffer[iCur++];
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}
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