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