Fix push parsing memory leak reported by Brandon Lucia at

[bison.git] / src / muscle_tab.h

/* Muscle table manager for Bison,
   Copyright (C) 2001, 2002, 2003, 2006, 2007 Free Software Foundation, Inc.

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

   Bison 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, or (at your option)
   any later version.

   Bison 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 Bison; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#ifndef MUSCLE_TAB_H_
# define MUSCLE_TAB_H_

# include "location.h"

void muscle_init (void);
void muscle_insert (char const *key, char const *value);
char const *muscle_find_const (char const *key);
char *muscle_find (char const *key);
void muscle_free (void);


/* An obstack dedicated to receive muscle keys and values.  */
extern struct obstack muscle_obstack;

#define MUSCLE_INSERT_BOOL(Key, Value)				\
do {								\
  int v = Value;						\
  MUSCLE_INSERT_INT (Key, v);					\
} while(0)

#define MUSCLE_INSERT_INT(Key, Value)				\
do {								\
  obstack_fgrow1 (&muscle_obstack, "%d", Value);		\
  obstack_1grow (&muscle_obstack, 0);				\
  muscle_insert (Key, obstack_finish (&muscle_obstack));	\
} while(0)

#define MUSCLE_INSERT_LONG_INT(Key, Value)			\
do {								\
  obstack_fgrow1 (&muscle_obstack, "%ld", Value);		\
  obstack_1grow (&muscle_obstack, 0);				\
  muscle_insert (Key, obstack_finish (&muscle_obstack));	\
} while(0)

#define MUSCLE_INSERT_STRING_RAW(Key, Value)			\
do {								\
  obstack_sgrow (&muscle_obstack, Value);			\
  obstack_1grow (&muscle_obstack, 0);				\
  muscle_insert (Key, obstack_finish (&muscle_obstack));	\
} while(0)

#define MUSCLE_INSERT_STRING(Key, Value)			\
do {								\
  MUSCLE_OBSTACK_SGROW (&muscle_obstack, Value);                \
  obstack_1grow (&muscle_obstack, 0);				\
  muscle_insert (Key, obstack_finish (&muscle_obstack));	\
} while(0)

#define MUSCLE_OBSTACK_SGROW(Obstack, Value)			\
do {								\
  char const *p;						\
  for (p = Value; *p; p++)					\
    switch (*p)							\
      {								\
      case '$':	obstack_sgrow (Obstack, "$]["); break;		\
      case '@':	obstack_sgrow (Obstack, "@@" ); break;		\
      case '[':	obstack_sgrow (Obstack, "@{" ); break;		\
      case ']':	obstack_sgrow (Obstack, "@}" ); break;		\
      default: obstack_1grow (Obstack, *p); break;		\
      }								\
} while(0)

#define MUSCLE_INSERT_C_STRING(Key, Value)			\
do {								\
  MUSCLE_OBSTACK_SGROW (&muscle_obstack,			\
			quotearg_style (c_quoting_style,	\
					Value));		\
  obstack_1grow (&muscle_obstack, 0);				\
  muscle_insert (Key, obstack_finish (&muscle_obstack));	\
} while(0)

/* Append VALUE to the current value of KEY.  If KEY did not already
   exist, create it.  Use MUSCLE_OBSTACK.  De-allocate the previously
   associated value.  Copy VALUE and SEPARATOR.  */

void muscle_grow (const char *key, const char *value, const char *separator);


/* Append VALUE to the current value of KEY, using muscle_grow.  But
   in addition, issue a synchronization line for the location LOC.  */

void muscle_code_grow (const char *key, const char *value, location loc);


/* MUSCLE is an M4 list of pairs.  Create or extend it with the pair
   (A1, A2) after escaping both values with digraphs.  Note that because the
   muscle values are output *double* quoted, one needs to strip the first level
   of quotes to reach the list itself.  */
void muscle_pair_list_grow (const char *muscle,
			    const char *a1, const char *a2);

/* In the format `[[file_name:line.column]], [[file_name:line.column]]', append
   LOC to MUSCLE.  Use digraphs for special characters in each file name.  */
void muscle_location_grow (char const *key, location loc);

/* In the format `file_name:line.column', append BOUND to MUSCLE.  Use digraphs
   for special characters in the file name.  */
void muscle_boundary_grow (char const *key, boundary bound);

/* Grow KEY for the occurrence of the name USER_NAME at LOC appropriately for
   use with b4_check_user_names in ../data/bison.m4.  USER_NAME is not escaped
   with digraphs, so it must not contain `[' or `]'.  */
void muscle_user_name_list_grow (char const *key, char const *user_name,
                                 location loc);

/* Define the muscle for the %define variable VARIABLE appearing at
   VARIABLE_LOC in the grammar file with value VALUE.  Warn if VARIABLE is
   already defined.  Record this as a grammar occurrence of VARIABLE by
   invoking muscle_user_name_list_grow.  */
void muscle_percent_define_insert (char const *variable, location variable_loc,
                                   char const *value);

/* Mimic b4_percent_define_get in ../data/bison.m4 exactly.  That is, if the
   %define variable VARIABLE is defined, return its value.  Otherwise, return
   the empty string.  Also, record Bison's usage of VARIABLE by defining
   b4_percent_define_bison_variables(VARIABLE).  The caller is responsible for
   freeing the memory of the returned string.  */
char *muscle_percent_define_get (char const *variable);

/* Mimic b4_percent_define_ifdef in ../data/bison.m4 exactly.  That is, if the
   %define variable VARIABLE is defined, return true.  Otherwise, return false.
   Also, record Bison's usage of VARIABLE by defining
   b4_percent_define_bison_variables(VARIABLE).  */
bool muscle_percent_define_ifdef (char const *variable);

/* Mimic b4_percent_define_flag_if in ../data/bison.m4 exactly.  That is, if
   the %define variable VARIABLE is defined to "" or "true", return true.  If
   it is defined to "false", return false.  Complain if it is undefined (a
   Bison error since the default value should have been set already) or defined
   to any other value (possibly a user error).  Also, record Bison's usage of
   VARIABLE by defining b4_percent_define_bison_variables(VARIABLE).  */
bool muscle_percent_define_flag_if (char const *variable);

/* Mimic b4_percent_define_default in ../data/bison.m4 exactly.  That is, if
   the %define variable VARIABLE is undefined, set its value to VALUE.
   Don't record this as a Bison usage of VARIABLE as there's no reason to
   suspect that the value has yet influenced the output.  */
void muscle_percent_define_default (char const *variable, char const *value);

/* VALUES points to a sequence of strings that is partitioned into
   subsequences by NULL's, one terminating each subsequence.  The last
   subsequence is followed by a second NULL.  For each subsequence, the first
   string is the name of a %define variable, and all remaining strings in that
   subsequence are the valid values for that variable.  Complain if such a
   variable is undefined (a Bison error since the default value should have
   been set already) or defined to any other value (possibly a user error).
   Don't record this as a Bison usage of the variable as there's no reason to
   suspect that the value has yet influenced the output.  */
void muscle_percent_define_check_values (char const * const *values);

/* Grow the muscle for the %code qualifier QUALIFIER appearing at QUALIFIER_LOC
   in the grammar file with code CODE appearing at CODE_LOC.  Record this as a
   grammar occurrence of VARIABLE by invoking muscle_user_name_list_grow.  */
void muscle_percent_code_grow (char const *qualifier, location qualifier_loc,
                               char const *code, location code_loc);

void muscles_m4_output (FILE *out);

#endif /* not MUSCLE_TAB_H_ */