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78 lines
1.7 KiB
78 lines
1.7 KiB
#ifndef INC_CharInputBuffer_h__
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# define INC_CharInputBuffer_h__
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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/license.html
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*
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* $Id$
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*/
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# include <antlr/config.h>
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# include <antlr/InputBuffer.h>
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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.h 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.h 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
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