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Viewing changes to lib/antlr/antlr/CharInputBuffer.hpp

  • Committer: Bazaar Package Importer
  • Author(s): Jeremy Lainé
  • Date: 2006-05-23 18:39:42 UTC
  • Revision ID: james.westby@ubuntu.com-20060523183942-hucifbvh68k2bwz7
Tags: upstream-3.3.2
Import upstream version 3.3.2

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lib/antlr/antlr/CharInputBuffer.hpp
 
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#ifndef INC_CharInputBuffer_hpp__
 
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# define INC_CharInputBuffer_hpp__
 
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/* ANTLR Translator Generator
 
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 * Project led by Terence Parr at http://www.jGuru.com
 
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 * Software rights: http://www.antlr.org/RIGHTS.html
 
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 *
 
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 */
 
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# include <antlr/config.hpp>
 
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# include <antlr/InputBuffer.hpp>
 
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# ifdef HAS_NOT_CCTYPE_H
 
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#       include <ctype.h>
 
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# else
 
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#       include <cctype>
 
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# endif
 
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
 
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namespace antlr {
 
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#endif
 
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/** CharInputBuffer.hpp provides an InputBuffer for plain character arrays (buffers).
 
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 */
 
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class CharInputBuffer : public InputBuffer
 
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{
 
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public:
 
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        /** Construct a CharInputBuffer.hpp object with a char* buffer of 'size'
 
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         * if 'owner' is true, then the buffer will be delete[]-ed on destruction.
 
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         * @note it is assumed the buffer was allocated with new[]!
 
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         */
 
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        CharInputBuffer( unsigned char* buf, size_t size, bool owner = false )
 
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        : buffer(buf)
 
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        , ptr(buf)
 
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        , end(buf + size)
 
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        , delete_buffer(owner)
 
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        {
 
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        }
 
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        /** Destructor
 
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         * @note If you're using malloced data, then you probably need to change
 
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         * this destructor. Or better use this class as template for your own.
 
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         */
 
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        ~CharInputBuffer( void )
 
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        {
 
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                if( delete_buffer && buffer )
 
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                        delete [] buffer;
 
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        }
 
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        /** Reset the CharInputBuffer to initial state
 
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         * Called from LexerInputState::reset.
 
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         * @see LexerInputState
 
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         */
 
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        virtual inline void reset( void )
 
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        {
 
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                InputBuffer::reset();
 
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                ptr = buffer;
 
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        }
 
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        virtual int getChar( void )
 
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        {
 
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                return (ptr < end) ? *ptr++ : EOF;
 
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        }
 
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protected:
 
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        unsigned char* buffer;  ///< the buffer with data
 
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        unsigned char* ptr;             ///< position ptr into the buffer
 
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        unsigned char* end;             ///< end sentry for buffer
 
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        bool delete_buffer;             ///< flag signifying if we have to delete the buffer
 
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};
 
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
 
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}
 
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#endif
 
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#endif