src/muscle-tab.h

   1 /* Muscle table manager for Bison,
   2
   3    Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of Bison, the GNU Compiler Compiler.
   7
   8    This program is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation, either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef MUSCLE_TAB_H_
  22 # define MUSCLE_TAB_H_
  23
  24 # include "location.h"
  25
  26 void muscle_init (void);
  27 void muscle_insert (char const *key, char const *value);
  28 char const *muscle_find_const (char const *key);
  29 char *muscle_find (char const *key);
  30 void muscle_free (void);
  31
  32
  33 /* An obstack dedicated to receive muscle keys and values.  */
  34 extern struct obstack muscle_obstack;
  35
  36 #define MUSCLE_INSERT_BOOL(Key, Value)                          \
  37 do {                                                            \
  38   int v__ = Value;                                              \
  39   MUSCLE_INSERT_INT (Key, v__);                                 \
  40 } while(0)
  41
  42 #define MUSCLE_INSERT_INT(Key, Value)                           \
  43 do {                                                            \
  44   obstack_fgrow1 (&muscle_obstack, "%d", Value);                \
  45   obstack_1grow (&muscle_obstack, 0);                           \
  46   muscle_insert (Key, obstack_finish (&muscle_obstack));        \
  47 } while(0)
  48
  49 #define MUSCLE_INSERT_LONG_INT(Key, Value)                      \
  50 do {                                                            \
  51   obstack_fgrow1 (&muscle_obstack, "%ld", Value);               \
  52   obstack_1grow (&muscle_obstack, 0);                           \
  53   muscle_insert (Key, obstack_finish (&muscle_obstack));        \
  54 } while(0)
  55
  56 /* Key -> Value, but don't apply escaping to Value. */
  57 #define MUSCLE_INSERT_STRING_RAW(Key, Value)                    \
  58 do {                                                            \
  59   obstack_sgrow (&muscle_obstack, Value);                       \
  60   obstack_1grow (&muscle_obstack, 0);                           \
  61   muscle_insert (Key, obstack_finish (&muscle_obstack));        \
  62 } while(0)
  63
  64 /* Key -> Value, applying M4 escaping to Value. */
  65 #define MUSCLE_INSERT_STRING(Key, Value)                        \
  66 do {                                                            \
  67   MUSCLE_OBSTACK_SGROW (&muscle_obstack, Value);                \
  68   obstack_1grow (&muscle_obstack, 0);                           \
  69   muscle_insert (Key, obstack_finish (&muscle_obstack));        \
  70 } while(0)
  71
  72 #define MUSCLE_OBSTACK_SGROW(Obstack, Value)            \
  73 do {                                                    \
  74   char const *p__;                                      \
  75   for (p__ = Value; *p__; p__++)                        \
  76     switch (*p__)                                       \
  77       {                                                 \
  78       case '$': obstack_sgrow (Obstack, "$]["); break;  \
  79       case '@': obstack_sgrow (Obstack, "@@" ); break;  \
  80       case '[': obstack_sgrow (Obstack, "@{" ); break;  \
  81       case ']': obstack_sgrow (Obstack, "@}" ); break;  \
  82       default: obstack_1grow (Obstack, *p__); break;    \
  83       }                                                 \
  84 } while(0)
  85
  86 #define MUSCLE_INSERT_C_STRING(Key, Value)                      \
  87 do {                                                            \
  88   MUSCLE_OBSTACK_SGROW (&muscle_obstack,                        \
  89                         quotearg_style (c_quoting_style,        \
  90                                         Value));                \
  91   obstack_1grow (&muscle_obstack, 0);                           \
  92   muscle_insert (Key, obstack_finish (&muscle_obstack));        \
  93 } while(0)
  94
  95 /* Append VALUE to the current value of KEY.  If KEY did not already
  96    exist, create it.  Use MUSCLE_OBSTACK.  De-allocate the previously
  97    associated value.  Copy VALUE and SEPARATOR.  */
  98
  99 void muscle_grow (const char *key, const char *value, const char *separator);
 100
 101
 102 /* Append VALUE to the current value of KEY, using muscle_grow.  But
 103    in addition, issue a synchronization line for the location LOC.  */
 104
 105 void muscle_code_grow (const char *key, const char *value, location loc);
 106
 107
 108 /* MUSCLE is an M4 list of pairs.  Create or extend it with the pair
 109    (A1, A2) after escaping both values with digraphs.  Note that because the
 110    muscle values are output *double* quoted, one needs to strip the first level
 111    of quotes to reach the list itself.  */
 112 void muscle_pair_list_grow (const char *muscle,
 113                             const char *a1, const char *a2);
 114
 115 /* In the format `[[file_name:line.column]], [[file_name:line.column]]', append
 116    LOC to MUSCLE.  Use digraphs for special characters in each file name.  */
 117 void muscle_location_grow (char const *key, location loc);
 118
 119 /* In the format `file_name:line.column', append BOUND to MUSCLE.  Use digraphs
 120    for special characters in the file name.  */
 121 void muscle_boundary_grow (char const *key, boundary bound);
 122
 123 /* Grow KEY for the occurrence of the name USER_NAME at LOC appropriately for
 124    use with b4_check_user_names in ../data/bison.m4.  USER_NAME is not escaped
 125    with digraphs, so it must not contain `[' or `]'.  */
 126 void muscle_user_name_list_grow (char const *key, char const *user_name,
 127                                  location loc);
 128
 129 /* Define the muscle for the %define variable VARIABLE appearing at
 130    VARIABLE_LOC in the grammar file with value VALUE.  Warn if VARIABLE is
 131    already defined.  Record this as a grammar occurrence of VARIABLE by
 132    invoking muscle_user_name_list_grow.  */
 133 void muscle_percent_define_insert (char const *variable, location variable_loc,
 134                                    char const *value);
 135
 136 /* Make sure that VARIABLE is set to the boolean VALUE.  Warn on mismatches
 137    only, but accept repeated declaration.  Used for backward compatibility
 138    between old directives such as %pure-parser, and the recommended use of
 139    variables (%define api.pure).   */
 140 void muscle_percent_define_ensure (char const *variable, location variable_loc,
 141                                    bool value);
 142
 143 /* Mimic b4_percent_define_get in ../data/bison.m4 exactly.  That is, if the
 144    %define variable VARIABLE is defined, return its value.  Otherwise, return
 145    the empty string.  Also, record Bison's usage of VARIABLE by defining
 146    b4_percent_define_bison_variables(VARIABLE).  The caller is responsible for
 147    freeing the memory of the returned string.  */
 148 char *muscle_percent_define_get (char const *variable);
 149
 150 /* Mimic muscle_percent_define_get_loc in ../data/bison.m4 exactly.  That is,
 151    if the %define variable VARIABLE is undefined, complain fatally since that's
 152    a Bison error.  Otherwise, return its definition location in a form
 153    approriate for the first argument of warn_at, complain_at, or fatal_at.
 154    Don't record this as a Bison usage of VARIABLE as there's no reason to
 155    suspect that the user-supplied value has yet influenced the output.  */
 156 location muscle_percent_define_get_loc (char const *variable);
 157
 158 /* Mimic muscle_percent_define_get_syncline in ../data/bison.m4 exactly.  That
 159    is, if the %define variable VARIABLE is undefined, complain fatally since
 160    that's a Bison error.  Otherwise, return its definition location as a
 161    b4_syncline invocation.  Don't record this as a Bison usage of VARIABLE as
 162    there's no reason to suspect that the user-supplied value has yet influenced
 163    the output.  */
 164 char const *muscle_percent_define_get_syncline (char const *variable);
 165
 166 /* Mimic b4_percent_define_ifdef in ../data/bison.m4 exactly.  That is, if the
 167    %define variable VARIABLE is defined, return true.  Otherwise, return false.
 168    Also, record Bison's usage of VARIABLE by defining
 169    b4_percent_define_bison_variables(VARIABLE).  */
 170 bool muscle_percent_define_ifdef (char const *variable);
 171
 172 /* Mimic b4_percent_define_flag_if in ../data/bison.m4 exactly.  That is, if
 173    the %define variable VARIABLE is defined to "" or "true", return true.  If
 174    it is defined to "false", return false.  Complain if it is undefined (a
 175    Bison error since the default value should have been set already) or defined
 176    to any other value (possibly a user error).  Also, record Bison's usage of
 177    VARIABLE by defining b4_percent_define_bison_variables(VARIABLE).  */
 178 bool muscle_percent_define_flag_if (char const *variable);
 179
 180 /* Mimic b4_percent_define_default in ../data/bison.m4 exactly.  That is, if
 181    the %define variable VARIABLE is undefined, set its value to VALUE.
 182    Don't record this as a Bison usage of VARIABLE as there's no reason to
 183    suspect that the value has yet influenced the output.  */
 184 void muscle_percent_define_default (char const *variable, char const *value);
 185
 186 /* Mimic b4_percent_define_check_values in ../data/bison.m4 exactly except that
 187    the VALUES structure is more appropriate for C.  That is, VALUES points to a
 188    list of strings that is partitioned into sublists by NULL's, one terminating
 189    each sublist.  The last sublist is followed by a second NULL.  For each
 190    sublist, the first string is the name of a %define variable, and all
 191    remaining strings in that sublist are the valid values for that variable.
 192    Complain if such a variable is undefined (a Bison error since the default
 193    value should have been set already) or defined to any other value (possibly
 194    a user error).  Don't record this as a Bison usage of the variable as
 195    there's no reason to suspect that the value has yet influenced the
 196    output.  */
 197 void muscle_percent_define_check_values (char const * const *values);
 198
 199 /* Grow the muscle for the %code qualifier QUALIFIER appearing at QUALIFIER_LOC
 200    in the grammar file with code CODE appearing at CODE_LOC.  Record this as a
 201    grammar occurrence of VARIABLE by invoking muscle_user_name_list_grow.  */
 202 void muscle_percent_code_grow (char const *qualifier, location qualifier_loc,
 203                                char const *code, location code_loc);
 204
 205 void muscles_m4_output (FILE *out);
 206
 207 #endif /* not MUSCLE_TAB_H_ */