data/c.m4

   1 m4_divert(-1)                                               -*- Autoconf -*-
   2
   3 # C M4 Macros for Bison.
   4 # Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
   5
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 # 02110-1301  USA
  20
  21
  22 ## ---------------- ##
  23 ## Identification.  ##
  24 ## ---------------- ##
  25
  26 # b4_copyright(TITLE, YEARS)
  27 # --------------------------
  28 m4_define([b4_copyright],
  29 [/* A Bison parser, made by GNU Bison b4_version.  */
  30
  31 /* $1,
  32    Copyright (C) $2 Free Software Foundation, Inc.
  33
  34    This program is free software; you can redistribute it and/or modify
  35    it under the terms of the GNU General Public License as published by
  36    the Free Software Foundation; either version 2, or (at your option)
  37    any later version.
  38
  39    This program is distributed in the hope that it will be useful,
  40    but WITHOUT ANY WARRANTY; without even the implied warranty of
  41    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  42    GNU General Public License for more details.
  43
  44    You should have received a copy of the GNU General Public License
  45    along with this program; if not, write to the Free Software
  46    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  47    Boston, MA 02110-1301, USA.  */])
  48
  49
  50 # b4_identification
  51 # -----------------
  52 m4_define([b4_identification],
  53 [/* Identify Bison output.  */
  54 [#]define YYBISON 1
  55
  56 /* Bison version.  */
  57 [#]define YYBISON_VERSION "b4_version"
  58
  59 /* Skeleton name.  */
  60 [#]define YYSKELETON_NAME b4_skeleton
  61
  62 /* Pure parsers.  */
  63 [#]define YYPURE b4_pure
  64
  65 /* Using locations.  */
  66 [#]define YYLSP_NEEDED b4_locations_flag
  67 ])
  68
  69
  70
  71 ## ---------------- ##
  72 ## Default values.  ##
  73 ## ---------------- ##
  74
  75 m4_define_default([b4_epilogue], [])
  76
  77
  78
  79 ## ------------------------ ##
  80 ## Pure/impure interfaces.  ##
  81 ## ------------------------ ##
  82
  83
  84 # b4_user_args
  85 # ------------
  86 m4_define([b4_user_args],
  87 [m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
  88
  89
  90 # b4_parse_param
  91 # --------------
  92 # If defined, b4_parse_param arrives double quoted, but below we prefer
  93 # it to be single quoted.
  94 m4_define_default([b4_parse_param])
  95 m4_define([b4_parse_param],
  96 b4_parse_param))
  97
  98
  99
 100 ## ------------ ##
 101 ## Data Types.  ##
 102 ## ------------ ##
 103
 104
 105 # b4_ints_in(INT1, INT2, LOW, HIGH)
 106 # ---------------------------------
 107 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
 108 m4_define([b4_ints_in],
 109 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
 110
 111
 112 # b4_int_type(MIN, MAX)
 113 # ---------------------
 114 # Return the smallest int type able to handle numbers ranging from
 115 # MIN to MAX (included).
 116 m4_define([b4_int_type],
 117 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
 118        b4_ints_in($@,   [-128],   [127]), [1], [signed char],
 119
 120        b4_ints_in($@,      [0], [65535]), [1], [unsigned short int],
 121        b4_ints_in($@, [-32768], [32767]), [1], [short int],
 122
 123        m4_eval([0 <= $1]),                [1], [unsigned int],
 124
 125                                                [int])])
 126
 127
 128 # b4_int_type_for(NAME)
 129 # ---------------------
 130 # Return the smallest int type able to handle numbers ranging from
 131 # `NAME_min' to `NAME_max' (included).
 132 m4_define([b4_int_type_for],
 133 [b4_int_type($1_min, $1_max)])
 134
 135
 136 ## ------------------ ##
 137 ## Decoding options.  ##
 138 ## ------------------ ##
 139
 140
 141 # b4_error_verbose_if(IF-TRUE, IF-FALSE)
 142 # --------------------------------------
 143 # Expand IF-TRUE, if errors are verbose, IF-FALSE otherwise.
 144 m4_define([b4_error_verbose_if],
 145 [m4_if(b4_error_verbose, [1],
 146        [$1],
 147        [$2])])
 148
 149
 150 # b4_location_if(IF-TRUE, IF-FALSE)
 151 # ---------------------------------
 152 # Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
 153 m4_define([b4_location_if],
 154 [m4_if(b4_locations_flag, [1],
 155        [$1],
 156        [$2])])
 157
 158
 159 # b4_pure_if(IF-TRUE, IF-FALSE)
 160 # -----------------------------
 161 # Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
 162 m4_define([b4_pure_if],
 163 [m4_if(b4_pure, [1],
 164        [$1],
 165        [$2])])
 166
 167
 168
 169 ## ------------------------- ##
 170 ## Assigning token numbers.  ##
 171 ## ------------------------- ##
 172
 173 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
 174 # -----------------------------------------
 175 # Output the definition of this token as #define.
 176 m4_define([b4_token_define],
 177 [#define $1 $2
 178 ])
 179
 180
 181 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 182 # -------------------------------------------------------
 183 # Output the definition of the tokens (if there are) as #defines.
 184 m4_define([b4_token_defines],
 185 [m4_if([$@], [[]], [],
 186 [/* Tokens.  */
 187 m4_map([b4_token_define], [$@])])
 188 ])
 189
 190
 191 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
 192 # ---------------------------------------
 193 # Output the definition of this token as an enum.
 194 m4_define([b4_token_enum],
 195 [$1 = $2])
 196
 197
 198 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 199 # -----------------------------------------------------
 200 # Output the definition of the tokens (if there are) as enums.
 201 m4_define([b4_token_enums],
 202 [m4_if([$@], [[]], [],
 203 [/* Tokens.  */
 204 #ifndef YYTOKENTYPE
 205 # define YYTOKENTYPE
 206    /* Put the tokens into the symbol table, so that GDB and other debuggers
 207       know about them.  */
 208    enum yytokentype {
 209 m4_map_sep([     b4_token_enum], [,
 210 ],
 211            [$@])
 212    };
 213 #endif
 214 ])])
 215
 216
 217 # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 218 # -------------------------------------------------------------
 219 # Output the definition of the tokens (if there are) as enums and #defines.
 220 m4_define([b4_token_enums_defines],
 221 [b4_token_enums($@)b4_token_defines($@)
 222 ])
 223
 224
 225
 226 ## --------------------------------------------- ##
 227 ## Defining C functions in both K&R and ANSI-C.  ##
 228 ## --------------------------------------------- ##
 229
 230
 231 # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 232 # ----------------------------------------------------------
 233 # Declare the function NAME.
 234 m4_define([b4_c_function_def],
 235 [#if defined (__STDC__) || defined (__cplusplus)
 236 b4_c_ansi_function_def($@)
 237 #else
 238 $2
 239 $1 (b4_c_knr_formal_names(m4_shiftn(2, $@)))
 240 b4_c_knr_formal_decls(m4_shiftn(2, $@))
 241 #endif[]dnl
 242 ])
 243
 244
 245 # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 246 # ---------------------------------------------------------------
 247 # Declare the function NAME in ANSI.
 248 m4_define([b4_c_ansi_function_def],
 249 [$2
 250 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl
 251 ])
 252
 253
 254 # b4_c_ansi_formals([DECL1, NAME1], ...)
 255 # --------------------------------------
 256 # Output the arguments ANSI-C definition.
 257 m4_define([b4_c_ansi_formals],
 258 [m4_case([$@],
 259          [],   [void],
 260          [[]], [void],
 261                [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
 262
 263 m4_define([b4_c_ansi_formal],
 264 [$1])
 265
 266
 267 # b4_c_knr_formal_names([DECL1, NAME1], ...)
 268 # ------------------------------------------
 269 # Output the argument names.
 270 m4_define([b4_c_knr_formal_names],
 271 [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
 272
 273 m4_define([b4_c_knr_formal_name],
 274 [$2])
 275
 276
 277 # b4_c_knr_formal_decls([DECL1, NAME1], ...)
 278 # ------------------------------------------
 279 # Output the K&R argument declarations.
 280 m4_define([b4_c_knr_formal_decls],
 281 [m4_map_sep([b4_c_knr_formal_decl],
 282             [
 283 ],
 284             [$@])])
 285
 286 m4_define([b4_c_knr_formal_decl],
 287 [    $1;])
 288
 289
 290
 291 ## ------------------------------------------------------------ ##
 292 ## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
 293 ## ------------------------------------------------------------ ##
 294
 295
 296 # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 297 # -----------------------------------------------------------
 298 # Declare the function NAME.
 299 m4_define([b4_c_function_decl],
 300 [#if defined (__STDC__) || defined (__cplusplus)
 301 b4_c_ansi_function_decl($@)
 302 #else
 303 $2 $1 ();
 304 #endif[]dnl
 305 ])
 306
 307
 308 # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 309 # ----------------------------------------------------------------
 310 # Declare the function NAME.
 311 m4_define([b4_c_ansi_function_decl],
 312 [$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl
 313 ])
 314
 315
 316
 317
 318 ## --------------------- ##
 319 ## Calling C functions.  ##
 320 ## --------------------- ##
 321
 322
 323 # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 324 # -----------------------------------------------------------
 325 # Call the function NAME with arguments NAME1, NAME2 etc.
 326 m4_define([b4_c_function_call],
 327 [$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
 328 ])
 329
 330
 331 # b4_c_args([DECL1, NAME1], ...)
 332 # ------------------------------
 333 # Output the arguments NAME1, NAME2...
 334 m4_define([b4_c_args],
 335 [m4_map_sep([b4_c_arg], [, ], [$@])])
 336
 337 m4_define([b4_c_arg],
 338 [$2])
 339
 340
 341 ## ----------- ##
 342 ## Synclines.  ##
 343 ## ----------- ##
 344
 345
 346 # b4_syncline(LINE, FILE)
 347 # -----------------------
 348 m4_define([b4_syncline],
 349 [m4_if(b4_synclines_flag, 1,
 350        [[#]line $1 $2])])
 351
 352
 353 # b4_symbol_actions(FILENAME, LINENO,
 354 #                   SYMBOL-TAG, SYMBOL-NUM,
 355 #                   SYMBOL-ACTION, SYMBOL-TYPENAME)
 356 # -------------------------------------------------
 357 m4_define([b4_symbol_actions],
 358 [m4_pushdef([b4_dollar_dollar],
 359    [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
 360 m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
 361       case $4: /* $3 */
 362 b4_syncline([$2], [$1])
 363         $5;
 364 b4_syncline([@oline@], [@ofile@])
 365         break;
 366 m4_popdef([b4_at_dollar])dnl
 367 m4_popdef([b4_dollar_dollar])dnl
 368 ])
 369
 370
 371 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 372 # -------------------------------------------
 373 # Generate the "yydestruct" function, which declaration is issued using
 374 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 375 # or "b4_c_function_def" for K&R.
 376 m4_define_default([b4_yydestruct_generate],
 377 [[/*-----------------------------------------------.
 378 | Release the memory associated to this symbol.  |
 379 `-----------------------------------------------*/
 380
 381 ]$1([yydestruct],
 382     [static void],
 383     [[const char *yymsg],    [yymsg]],
 384     [[int yytype],           [yytype]],
 385     [[YYSTYPE *yyvaluep],    [yyvaluep]]b4_location_if([,
 386     [[YYLTYPE *yylocationp], [yylocationp]]]))[
 387 {
 388   /* Pacify ``unused variable'' warnings.  */
 389   (void) yyvaluep;
 390 ]b4_location_if([  (void) yylocationp;
 391 ])[
 392   if (!yymsg)
 393     yymsg = "Deleting";
 394   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 395
 396   switch (yytype)
 397     {
 398 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
 399       default:
 400         break;
 401     }
 402 }]dnl
 403 ])
 404
 405
 406 # b4_yysymprint_generate(FUNCTION-DECLARATOR)
 407 # -------------------------------------------
 408 # Generate the "yysymprint" function, which declaration is issued using
 409 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 410 # or "b4_c_function_def" for K&R.
 411 m4_define_default([b4_yysymprint_generate],
 412 [[/*--------------------------------.
 413 | Print this symbol on YYOUTPUT.  |
 414 `--------------------------------*/
 415
 416 ]$1([yysymprint],
 417     [static void],
 418     [[FILE *yyoutput],       [yyoutput]],
 419     [[int yytype],           [yytype]],
 420     [[YYSTYPE *yyvaluep],    [yyvaluep]]b4_location_if([,
 421     [[YYLTYPE *yylocationp], [yylocationp]]]))
 422 {
 423   /* Pacify ``unused variable'' warnings.  */
 424   (void) yyvaluep;
 425 b4_location_if([  (void) yylocationp;
 426 ])dnl
 427 [
 428   if (yytype < YYNTOKENS)
 429     YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
 430   else
 431     YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
 432
 433 ]b4_location_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
 434   YYFPRINTF (yyoutput, ": ");
 435 ])dnl
 436 [
 437 # ifdef YYPRINT
 438   if (yytype < YYNTOKENS)
 439     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
 440 # endif
 441   switch (yytype)
 442     {
 443 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 444 [      default:
 445         break;
 446     }
 447   YYFPRINTF (yyoutput, ")");
 448 }
 449 ]])