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#ifndef INC_CharInputBuffer_hpp__ |
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# define INC_CharInputBuffer_hpp__ |
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|
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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: CharInputBuffer.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $ |
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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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|
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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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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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namespace antlr { |
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#endif |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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} |
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#endif |
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|
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#endif |
