src/muscle-tab.h

   1 /* Muscle table manager for Bison,
   2
   3    Copyright (C) 2001-2003, 2006-2013 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef MUSCLE_TAB_H_
  21 # define MUSCLE_TAB_H_
  22
  23 # include <quotearg.h>
  24
  25 # include "location.h"
  26
  27 void muscle_init (void);
  28 void muscle_insert (char const *key, char const *value);
  29 char const *muscle_find_const (char const *key);
  30 char *muscle_find (char const *key);
  31 void muscle_free (void);
  32
  33
  34 /* An obstack dedicated to receive muscle keys and values.  */
  35 extern struct obstack muscle_obstack;
  36
  37 # define MUSCLE_INSERT_BOOL(Key, Value)         \
  38   do {                                          \
  39     int v__ = Value;                            \
  40     MUSCLE_INSERT_INT (Key, v__);               \
  41   } while (0)
  42
  43 # define MUSCLE_INSERTF(Key, Format, Value)                     \
  44   do {                                                          \
  45     obstack_printf (&muscle_obstack, Format, Value);            \
  46     muscle_insert (Key, obstack_finish0 (&muscle_obstack));     \
  47   } while (0)
  48
  49 # define MUSCLE_INSERT_INT(Key, Value)          \
  50   MUSCLE_INSERTF(Key, "%d", Value)
  51
  52 # define MUSCLE_INSERT_LONG_INT(Key, Value)     \
  53   MUSCLE_INSERTF(Key, "%ld", Value)
  54
  55 /* Key -> Value, but don't apply escaping to Value. */
  56 # define MUSCLE_INSERT_STRING_RAW(Key, Value)   \
  57   MUSCLE_INSERTF(Key, "%s", Value)
  58
  59 /* Key -> Value, applying M4 escaping to Value. */
  60 # define MUSCLE_INSERT_STRING(Key, Value)                       \
  61   do {                                                          \
  62     obstack_escape (&muscle_obstack, Value);                    \
  63     muscle_insert (Key, obstack_finish0 (&muscle_obstack));     \
  64   } while (0)
  65
  66 # define MUSCLE_INSERT_C_STRING(Key, Value)                     \
  67   do {                                                          \
  68     obstack_escape (&muscle_obstack,                            \
  69                     quotearg_style (c_quoting_style, Value));   \
  70     muscle_insert (Key, obstack_finish0 (&muscle_obstack));     \
  71   } while (0)
  72
  73 /* Append VALUE to the current value of KEY.  If KEY did not already
  74    exist, create it.  Use MUSCLE_OBSTACK.  De-allocate the previously
  75    associated value.  Copy VALUE and SEPARATOR.  */
  76
  77 void muscle_grow (const char *key, const char *value, const char *separator);
  78
  79
  80 /* Append VALUE to the current value of KEY, using muscle_grow.  But
  81    in addition, issue a synchronization line for the location LOC.  */
  82
  83 void muscle_code_grow (const char *key, const char *value, location loc);
  84
  85
  86 /* MUSCLE is an M4 list of pairs.  Create or extend it with the pair
  87    (A1, A2) after escaping both values with digraphs.  Note that because the
  88    muscle values are output *double* quoted, one needs to strip the first level
  89    of quotes to reach the list itself.  */
  90 void muscle_pair_list_grow (const char *muscle,
  91                             const char *a1, const char *a2);
  92
  93 /* Grow KEY for the occurrence of the name USER_NAME at LOC appropriately for
  94    use with b4_check_user_names in ../data/bison.m4.  USER_NAME is not escaped
  95    with digraphs, so it must not contain '[' or ']'.  */
  96 void muscle_user_name_list_grow (char const *key, char const *user_name,
  97                                  location loc);
  98
  99 /* Indicates whether a variable's value was specified with -D/--define, with
 100    -F/--force-define, or in the grammar file.  */
 101 typedef enum {
 102   MUSCLE_PERCENT_DEFINE_D = 0, MUSCLE_PERCENT_DEFINE_F,
 103   MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE
 104 } muscle_percent_define_how;
 105
 106 /* Define the muscles for %define variable VARIABLE with VALUE specified
 107    at VARIABLE_LOC in the manner HOW unless it was specified in the
 108    grammar file while the previous definition for VARIABLE was specified
 109    with -F/--force-define.  Complain if a previous definition is being
 110    overridden and the new definition is specified in the grammar file.
 111    (These rules support the documented behavior as long as command-line
 112    definitions are processed before grammar file definitions.)  Record
 113    this as a user occurrence of VARIABLE by invoking
 114    muscle_user_name_list_grow.  */
 115 void muscle_percent_define_insert (char const *variable, location variable_loc,
 116                                    char const *value,
 117                                    muscle_percent_define_how how);
 118
 119 /* Make sure that VARIABLE is set to the boolean VALUE.  Warn on mismatches
 120    only, but accept repeated declaration.  Used for backward compatibility
 121    between old directives such as %pure-parser, and the recommended use of
 122    variables (%define api.pure).   */
 123 void muscle_percent_define_ensure (char const *variable, location variable_loc,
 124                                    bool value);
 125
 126 /* Mimic b4_percent_define_get in ../data/bison.m4 exactly.  That is, if the
 127    %define variable VARIABLE is defined, return its value.  Otherwise, return
 128    the empty string.  Also, record Bison's usage of VARIABLE by defining
 129    b4_percent_define_bison_variables(VARIABLE).  The caller is responsible for
 130    freeing the memory of the returned string.  */
 131 char *muscle_percent_define_get (char const *variable);
 132
 133 /* Mimic muscle_percent_define_get_loc in ../data/bison.m4 exactly.  That is,
 134    if the %define variable VARIABLE is undefined, complain fatally since that's
 135    a Bison error.  Otherwise, return its definition location in a form
 136    approriate for the first argument of warn_at, complain_at, or fatal_at.
 137    Don't record this as a Bison usage of VARIABLE as there's no reason to
 138    suspect that the user-supplied value has yet influenced the output.  */
 139 location muscle_percent_define_get_loc (char const *variable);
 140
 141 /* Mimic muscle_percent_define_get_syncline in ../data/bison.m4 exactly.  That
 142    is, if the %define variable VARIABLE is undefined, complain fatally since
 143    that's a Bison error.  Otherwise, return its definition location as a
 144    b4_syncline invocation.  Don't record this as a Bison usage of VARIABLE as
 145    there's no reason to suspect that the user-supplied value has yet influenced
 146    the output.  */
 147 char const *muscle_percent_define_get_syncline (char const *variable);
 148
 149 /* Mimic b4_percent_define_ifdef in ../data/bison.m4 exactly.  That is, if the
 150    %define variable VARIABLE is defined, return true.  Otherwise, return false.
 151    Also, record Bison's usage of VARIABLE by defining
 152    b4_percent_define_bison_variables(VARIABLE).  */
 153 bool muscle_percent_define_ifdef (char const *variable);
 154
 155 /* Mimic b4_percent_define_flag_if in ../data/bison.m4 exactly.  That is, if
 156    the %define variable VARIABLE is defined to "" or "true", return true.  If
 157    it is defined to "false", return false.  Complain if it is undefined (a
 158    Bison error since the default value should have been set already) or defined
 159    to any other value (possibly a user error).  Also, record Bison's usage of
 160    VARIABLE by defining b4_percent_define_bison_variables(VARIABLE).  */
 161 bool muscle_percent_define_flag_if (char const *variable);
 162
 163 /* Mimic b4_percent_define_default in ../data/bison.m4 exactly.  That is, if
 164    the %define variable VARIABLE is undefined, set its value to VALUE.
 165    Don't record this as a Bison usage of VARIABLE as there's no reason to
 166    suspect that the value has yet influenced the output.  */
 167 void muscle_percent_define_default (char const *variable, char const *value);
 168
 169 /* Mimic b4_percent_define_check_values in ../data/bison.m4 exactly except that
 170    the VALUES structure is more appropriate for C.  That is, VALUES points to a
 171    list of strings that is partitioned into sublists by NULL's, one terminating
 172    each sublist.  The last sublist is followed by a second NULL.  For each
 173    sublist, the first string is the name of a %define variable, and all
 174    remaining strings in that sublist are the valid values for that variable.
 175    Complain if such a variable is undefined (a Bison error since the default
 176    value should have been set already) or defined to any other value (possibly
 177    a user error).  Don't record this as a Bison usage of the variable as
 178    there's no reason to suspect that the value has yet influenced the
 179    output.  */
 180 void muscle_percent_define_check_values (char const * const *values);
 181
 182 /* Grow the muscle for the %code qualifier QUALIFIER appearing at
 183    QUALIFIER_LOC with code CODE appearing at CODE_LOC.  Record this as a
 184    user occurrence of QUALIFIER by invoking
 185    muscle_user_name_list_grow.  */
 186 void muscle_percent_code_grow (char const *qualifier, location qualifier_loc,
 187                                char const *code, location code_loc);
 188
 189 void muscles_m4_output (FILE *out);
 190
 191 #endif /* not MUSCLE_TAB_H_ */