86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1992, Microsoft Corporation.
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//
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// File: STREAMS.HXX
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//
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// Contents:
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//
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// Classes: CStream, CStreamA, CStreamW, CStreamASCIIStr, CStreamUnicodeStr
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//
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// History: 29-Jul-92 MikeHew Created
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// 23-Sep-92 AmyA Added CStreamUnicodeStr
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// Rewrote CStreamASCIIStr
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// 02-Nov-92 AmyA Added CSubStream
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// 20-Nov-92 AmyA Rewrote all streams for input/
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// output buffering
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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#pragma once
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#ifdef DISPLAY_INCLUDES
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#pragma message( "#include <" __FILE__ ">..." )
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#endif
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#include <sys\types.h> // for BOOL typedef
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#include <memory.h> // for memcpy
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//+---------------------------------------------------------------------------
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//
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// Class: CStream
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//
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// Purpose: General stream interface
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//
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// History: 29-Jul-92 MikeHew Created
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// 18-Nov-92 AmyA Removed GetChar(), now in CStreamA
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// and CStreamW
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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class CStream
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{
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public:
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CStream () : _eof(FALSE) {}
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virtual ~CStream() {};
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enum SEEK
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{
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SET = 0, // Seek from beginning of stream
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CUR = 1, // Seek from current position
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END = 2 // Seek from end
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};
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//
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// Status functions
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//
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virtual BOOL Ok() = 0;
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inline BOOL Eof() { return _eof; }
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//
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// Input from stream functions
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//
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virtual unsigned APINOT Read( void *dest, unsigned size ) = 0;
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//
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// Output to stream functions
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//
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virtual unsigned APINOT Write( const void *source, unsigned size ) = 0;
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//
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// Misc
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//
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virtual int APINOT Seek( LONG offset, SEEK origin ) = 0;
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protected:
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BOOL _eof;
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};
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