src/flex-scanner.h

/* Common parts between scan-code.l and scan-gram.l.

   Copyright (C) 2006 Free Software Foundation, Inc.

   This file is part of Bison, the GNU Compiler Compiler.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301  USA
*/

#ifndef FLEX_PREFIX
# error "FLEX_PREFIX not defined"
#endif

/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used.  */
int   FLEX_PREFIX (get_lineno) (void);
FILE *FLEX_PREFIX (get_in) (void);
FILE *FLEX_PREFIX (get_out) (void);
int   FLEX_PREFIX (get_leng) (void);
char *FLEX_PREFIX (get_text) (void);
void  FLEX_PREFIX (set_lineno) (int);
void  FLEX_PREFIX (set_in) (FILE *);
void  FLEX_PREFIX (set_out) (FILE *);
int   FLEX_PREFIX (get_debug) (void);
void  FLEX_PREFIX (set_debug) (int);
int   FLEX_PREFIX (lex_destroy) (void);

#define last_string    FLEX_PREFIX (last_string)

/* It seems to be a nice "feature" of Flex that one cannot use yytext,
   yyleng etc. when a prefix is given, since there is no longer a
   #define, but rather the token is actually changed in the output.
   However, this is not true for Flex 2.5.4.  */
#ifndef yyleng
# define yyleng  FLEX_PREFIX (leng)
#endif
#ifndef yytext
# define yytext  FLEX_PREFIX (text)
#endif

/* OBSTACK_FOR_STRING -- Used to store all the characters that we need to
   keep (to construct ID, STRINGS etc.).  Use the following macros to
   use it.

   Use STRING_GROW to append what has just been matched, and
   STRING_FINISH to end the string (it puts the ending 0).
   STRING_FINISH also stores this string in LAST_STRING, which can be
   used, and which is used by STRING_FREE to free the last string.  */

static struct obstack obstack_for_string;

#define STRING_GROW   \
  obstack_grow (&obstack_for_string, yytext, yyleng)

#define STRING_FINISH					\
  do {							\
    obstack_1grow (&obstack_for_string, '\0');		\
    last_string = obstack_finish (&obstack_for_string);	\
  } while (0)

#define STRING_FREE \
  obstack_free (&obstack_for_string, FLEX_PREFIX (last_string))
Commit	Line	Data
	1	/* Common parts between scan-code.l and scan-gram.l.
	2
	3	Copyright (C) 2006 Free Software Foundation, Inc.
	4
	5	This file is part of Bison, the GNU Compiler Compiler.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	20	02110-1301 USA
	21	*/
	22
	23	#ifndef FLEX_PREFIX
	24	# error "FLEX_PREFIX not defined"
	25	#endif
	26
	27	/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
	28	int FLEX_PREFIX (get_lineno) (void);
	29	FILE *FLEX_PREFIX (get_in) (void);
	30	FILE *FLEX_PREFIX (get_out) (void);
	31	int FLEX_PREFIX (get_leng) (void);
	32	char *FLEX_PREFIX (get_text) (void);
	33	void FLEX_PREFIX (set_lineno) (int);
	34	void FLEX_PREFIX (set_in) (FILE *);
	35	void FLEX_PREFIX (set_out) (FILE *);
	36	int FLEX_PREFIX (get_debug) (void);
	37	void FLEX_PREFIX (set_debug) (int);
	38	int FLEX_PREFIX (lex_destroy) (void);
	39
	40	#define last_string FLEX_PREFIX (last_string)
	41
	42	/* It seems to be a nice "feature" of Flex that one cannot use yytext,
	43	yyleng etc. when a prefix is given, since there is no longer a
	44	#define, but rather the token is actually changed in the output.
	45	However, this is not true for Flex 2.5.4. */
	46	#ifndef yyleng
	47	# define yyleng FLEX_PREFIX (leng)
	48	#endif
	49	#ifndef yytext
	50	# define yytext FLEX_PREFIX (text)
	51	#endif
	52
	53	/* OBSTACK_FOR_STRING -- Used to store all the characters that we need to
	54	keep (to construct ID, STRINGS etc.). Use the following macros to
	55	use it.
	56
	57	Use STRING_GROW to append what has just been matched, and
	58	STRING_FINISH to end the string (it puts the ending 0).
	59	STRING_FINISH also stores this string in LAST_STRING, which can be
	60	used, and which is used by STRING_FREE to free the last string. */
	61
	62	static struct obstack obstack_for_string;
	63
	64	#define STRING_GROW \
	65	obstack_grow (&obstack_for_string, yytext, yyleng)
	66
	67	#define STRING_FINISH \
	68	do { \
	69	obstack_1grow (&obstack_for_string, '\0'); \
	70	last_string = obstack_finish (&obstack_for_string); \
	71	} while (0)
	72
	73	#define STRING_FREE \
	74	obstack_free (&obstack_for_string, FLEX_PREFIX (last_string))