1#ifndef INC_CharInputBuffer_hpp__
2# define INC_CharInputBuffer_hpp__
3
4/* ANTLR Translator Generator
5 * Project led by Terence Parr at http://www.jGuru.com
6 * Software rights: http://www.antlr.org/license.html
7 *
8 * $Id:$
9 */
10
11# include <antlr/config.hpp>
12# include <antlr/InputBuffer.hpp>
13
14# ifdef HAS_NOT_CCTYPE_H
15#	include <ctype.h>
16# else
17#	include <cctype>
18# endif
19
20#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
21namespace antlr {
22#endif
23
24/** CharInputBuffer.hpp provides an InputBuffer for plain character arrays (buffers).
25 */
26class CharInputBuffer : public InputBuffer
27{
28public:
29	/** Construct a CharInputBuffer.hpp object with a char* buffer of 'size'
30	 * if 'owner' is true, then the buffer will be delete[]-ed on destruction.
31	 * @note it is assumed the buffer was allocated with new[]!
32	 */
33	CharInputBuffer( unsigned char* buf, size_t size, bool owner = false )
34	: buffer(buf)
35	, ptr(buf)
36	, end(buf + size)
37	, delete_buffer(owner)
38	{
39	}
40
41	/** Destructor
42	 * @note If you're using malloced data, then you probably need to change
43	 * this destructor. Or better use this class as template for your own.
44	 */
45	~CharInputBuffer( void )
46	{
47		if( delete_buffer && buffer )
48			delete [] buffer;
49	}
50
51	/** Reset the CharInputBuffer to initial state
52	 * Called from LexerInputState::reset.
53	 * @see LexerInputState
54	 */
55	virtual inline void reset( void )
56	{
57		InputBuffer::reset();
58		ptr = buffer;
59	}
60
61	virtual int getChar( void )
62	{
63		return (ptr < end) ? *ptr++ : EOF;
64	}
65
66protected:
67	unsigned char* buffer;	///< the buffer with data
68	unsigned char* ptr;		///< position ptr into the buffer
69	unsigned char* end;		///< end sentry for buffer
70	bool delete_buffer;		///< flag signifying if we have to delete the buffer
71};
72
73#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
74}
75#endif
76
77#endif
78