| 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 |
| 21 |
namespace antlr { |
| 22 |
#endif |
| 23 |
|
| 24 |
/** CharInputBuffer.hpp provides an InputBuffer for plain character arrays (buffers). |
| 25 |
*/ |
| 26 |
class CharInputBuffer : public InputBuffer |
| 27 |
{ |
| 28 |
public: |
| 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 |
|
| 66 |
protected: |
| 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 |
