79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name :
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InStrm.h
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Abstract:
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A lightweight implementation of input streams. This class provides
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the interface, as well as a basic skeleton for input streams.
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Author:
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Neil Allain ( a-neilal ) August-1997
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Revision History:
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--*/
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#pragma once
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#include "MyString.h"
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struct CharCheck
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{
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virtual bool operator()( _TCHAR )=0;
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};
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struct IsWhiteSpace : public CharCheck
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{
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virtual bool operator()( _TCHAR );
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};
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struct IsNewLine : public CharCheck
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{
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virtual bool operator()( _TCHAR );
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};
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class InStream
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{
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public:
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enum{
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EndOfFile = E_FAIL
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};
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InStream();
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bool eof() const { return m_bEof; }
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HRESULT lastError() const { return m_lastError; }
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virtual HRESULT skip( CharCheck& )=0;
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virtual HRESULT back( size_t )=0;
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virtual HRESULT read( CharCheck&, String& )=0;
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virtual HRESULT readChar( _TCHAR& )=0;
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virtual HRESULT readInt16( SHORT& );
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virtual HRESULT readInt( int& );
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virtual HRESULT readInt32( LONG& );
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virtual HRESULT readUInt32( ULONG& );
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virtual HRESULT readFloat( float& );
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virtual HRESULT readDouble( double& );
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virtual HRESULT readString( String& );
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virtual HRESULT readLine( String& );
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virtual HRESULT skipWhiteSpace();
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InStream& operator>>( _TCHAR& );
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InStream& operator>>( SHORT& );
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InStream& operator>>( int& );
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InStream& operator>>( LONG& );
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InStream& operator>>( ULONG& );
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InStream& operator>>( float& );
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InStream& operator>>( double& );
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InStream& operator>>( String& );
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protected:
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void setLastError( HRESULT );
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private:
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bool m_bEof;
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HRESULT m_lastError;
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};
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