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 # b4_parse_param_for(DECL, FORMAL, BODY)
  99 # ---------------------------------------
 100 # Iterate over the user parameters, binding the declaration to DECL,
 101 # the formal name to FORMAL, and evaluating the BODY.
 102 m4_define([b4_parse_param_for],
 103 [m4_foreach([$1_$2], m4_defn([b4_parse_param]),
 104 [m4_pushdef([$1], m4_fst($1_$2))dnl
 105 m4_pushdef([$2], m4_shift($1_$2))dnl
 106 $3[]dnl
 107 m4_popdef([$2])dnl
 108 m4_popdef([$1])dnl
 109 ])])
 110
 111 # b4_parse_param_use
 112 # ------------------
 113 # `YYUSE' all the parse-params.
 114 m4_define([b4_parse_param_use],
 115 [b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);
 116 ])dnl
 117 ])
 118
 119 ## ------------ ##
 120 ## Data Types.  ##
 121 ## ------------ ##
 122
 123
 124 # b4_ints_in(INT1, INT2, LOW, HIGH)
 125 # ---------------------------------
 126 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
 127 m4_define([b4_ints_in],
 128 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
 129
 130
 131 # b4_int_type(MIN, MAX)
 132 # ---------------------
 133 # Return the smallest int type able to handle numbers ranging from
 134 # MIN to MAX (included).
 135 m4_define([b4_int_type],
 136 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
 137        b4_ints_in($@,   [-128],   [127]), [1], [signed char],
 138
 139        b4_ints_in($@,      [0], [65535]), [1], [unsigned short int],
 140        b4_ints_in($@, [-32768], [32767]), [1], [short int],
 141
 142        m4_eval([0 <= $1]),                [1], [unsigned int],
 143
 144                                                [int])])
 145
 146
 147 # b4_int_type_for(NAME)
 148 # ---------------------
 149 # Return the smallest int type able to handle numbers ranging from
 150 # `NAME_min' to `NAME_max' (included).
 151 m4_define([b4_int_type_for],
 152 [b4_int_type($1_min, $1_max)])
 153
 154
 155 ## ------------------ ##
 156 ## Decoding options.  ##
 157 ## ------------------ ##
 158
 159
 160 # b4_error_verbose_if(IF-TRUE, IF-FALSE)
 161 # --------------------------------------
 162 # Expand IF-TRUE, if errors are verbose, IF-FALSE otherwise.
 163 m4_define([b4_error_verbose_if],
 164 [m4_if(b4_error_verbose, [1],
 165        [$1],
 166        [$2])])
 167
 168
 169 # b4_location_if(IF-TRUE, IF-FALSE)
 170 # ---------------------------------
 171 # Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
 172 m4_define([b4_location_if],
 173 [m4_if(b4_locations_flag, [1],
 174        [$1],
 175        [$2])])
 176
 177
 178 # b4_pure_if(IF-TRUE, IF-FALSE)
 179 # -----------------------------
 180 # Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
 181 m4_define([b4_pure_if],
 182 [m4_if(b4_pure, [1],
 183        [$1],
 184        [$2])])
 185
 186
 187
 188 ## ------------------------- ##
 189 ## Assigning token numbers.  ##
 190 ## ------------------------- ##
 191
 192 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
 193 # -----------------------------------------
 194 # Output the definition of this token as #define.
 195 m4_define([b4_token_define],
 196 [#define $1 $2
 197 ])
 198
 199
 200 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 201 # -------------------------------------------------------
 202 # Output the definition of the tokens (if there are) as #defines.
 203 m4_define([b4_token_defines],
 204 [m4_if([$@], [[]], [],
 205 [/* Tokens.  */
 206 m4_map([b4_token_define], [$@])])
 207 ])
 208
 209
 210 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
 211 # ---------------------------------------
 212 # Output the definition of this token as an enum.
 213 m4_define([b4_token_enum],
 214 [$1 = $2])
 215
 216
 217 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 218 # -----------------------------------------------------
 219 # Output the definition of the tokens (if there are) as enums.
 220 m4_define([b4_token_enums],
 221 [m4_if([$@], [[]], [],
 222 [/* Tokens.  */
 223 #ifndef YYTOKENTYPE
 224 # define YYTOKENTYPE
 225    /* Put the tokens into the symbol table, so that GDB and other debuggers
 226       know about them.  */
 227    enum yytokentype {
 228 m4_map_sep([     b4_token_enum], [,
 229 ],
 230            [$@])
 231    };
 232 #endif
 233 ])])
 234
 235
 236 # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 237 # -------------------------------------------------------------
 238 # Output the definition of the tokens (if there are) as enums and #defines.
 239 m4_define([b4_token_enums_defines],
 240 [b4_token_enums($@)b4_token_defines($@)
 241 ])
 242
 243
 244
 245 ## --------------------------------------------- ##
 246 ## Defining C functions in both K&R and ANSI-C.  ##
 247 ## --------------------------------------------- ##
 248
 249
 250 # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 251 # ----------------------------------------------------------
 252 # Declare the function NAME.
 253 m4_define([b4_c_function_def],
 254 [#if defined (__STDC__) || defined (__C99__FUNC__) || defined (__cplusplus)
 255 b4_c_ansi_function_def($@)
 256 #else
 257 $2
 258 $1 (b4_c_knr_formal_names(m4_shiftn(2, $@)))
 259 b4_c_knr_formal_decls(m4_shiftn(2, $@))
 260 #endif[]dnl
 261 ])
 262
 263
 264 # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 265 # ---------------------------------------------------------------
 266 # Declare the function NAME in ANSI.
 267 m4_define([b4_c_ansi_function_def],
 268 [$2
 269 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl
 270 ])
 271
 272
 273 # b4_c_ansi_formals([DECL1, NAME1], ...)
 274 # --------------------------------------
 275 # Output the arguments ANSI-C definition.
 276 m4_define([b4_c_ansi_formals],
 277 [m4_case([$@],
 278          [],   [void],
 279          [[]], [void],
 280                [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
 281
 282 m4_define([b4_c_ansi_formal],
 283 [$1])
 284
 285
 286 # b4_c_knr_formal_names([DECL1, NAME1], ...)
 287 # ------------------------------------------
 288 # Output the argument names.
 289 m4_define([b4_c_knr_formal_names],
 290 [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
 291
 292 m4_define([b4_c_knr_formal_name],
 293 [$2])
 294
 295
 296 # b4_c_knr_formal_decls([DECL1, NAME1], ...)
 297 # ------------------------------------------
 298 # Output the K&R argument declarations.
 299 m4_define([b4_c_knr_formal_decls],
 300 [m4_map_sep([b4_c_knr_formal_decl],
 301             [
 302 ],
 303             [$@])])
 304
 305 m4_define([b4_c_knr_formal_decl],
 306 [    $1;])
 307
 308
 309
 310 ## ------------------------------------------------------------ ##
 311 ## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
 312 ## ------------------------------------------------------------ ##
 313
 314
 315 # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 316 # -----------------------------------------------------------
 317 # Declare the function NAME.
 318 m4_define([b4_c_function_decl],
 319 [#if defined (__STDC__) || defined (__cplusplus)
 320 b4_c_ansi_function_decl($@)
 321 #else
 322 $2 $1 ();
 323 #endif[]dnl
 324 ])
 325
 326
 327 # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 328 # ----------------------------------------------------------------
 329 # Declare the function NAME.
 330 m4_define([b4_c_ansi_function_decl],
 331 [$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl
 332 ])
 333
 334
 335
 336
 337 ## --------------------- ##
 338 ## Calling C functions.  ##
 339 ## --------------------- ##
 340
 341
 342 # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 343 # -----------------------------------------------------------
 344 # Call the function NAME with arguments NAME1, NAME2 etc.
 345 m4_define([b4_c_function_call],
 346 [$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
 347 ])
 348
 349
 350 # b4_c_args([DECL1, NAME1], ...)
 351 # ------------------------------
 352 # Output the arguments NAME1, NAME2...
 353 m4_define([b4_c_args],
 354 [m4_map_sep([b4_c_arg], [, ], [$@])])
 355
 356 m4_define([b4_c_arg],
 357 [$2])
 358
 359
 360 ## ----------- ##
 361 ## Synclines.  ##
 362 ## ----------- ##
 363
 364 # b4_syncline(LINE, FILE)
 365 # -----------------------
 366 m4_define([b4_syncline],
 367 [m4_if(b4_synclines_flag, 1,
 368        [[#]line $1 $2])])
 369
 370
 371
 372 ## -------------- ##
 373 ## User actions.  ##
 374 ## -------------- ##
 375
 376 # b4_symbol_actions(FILENAME, LINENO,
 377 #                   SYMBOL-TAG, SYMBOL-NUM,
 378 #                   SYMBOL-ACTION, SYMBOL-TYPENAME)
 379 # -------------------------------------------------
 380 m4_define([b4_symbol_actions],
 381 [m4_pushdef([b4_dollar_dollar],
 382    [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
 383 m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
 384       case $4: /* $3 */
 385 b4_syncline([$2], [$1])
 386         $5;
 387 b4_syncline([@oline@], [@ofile@])
 388         break;
 389 m4_popdef([b4_at_dollar])dnl
 390 m4_popdef([b4_dollar_dollar])dnl
 391 ])
 392
 393
 394 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 395 # -------------------------------------------
 396 # Generate the "yydestruct" function, which declaration is issued using
 397 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 398 # or "b4_c_function_def" for K&R.
 399 m4_define_default([b4_yydestruct_generate],
 400 [[/*-----------------------------------------------.
 401 | Release the memory associated to this symbol.  |
 402 `-----------------------------------------------*/
 403
 404 ]$1([yydestruct],
 405     [static void],
 406     [[const char *yymsg],    [yymsg]],
 407     [[int yytype],           [yytype]],
 408     [[YYSTYPE *yyvaluep],    [yyvaluep]][]dnl
 409 b4_location_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 410 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 411 {
 412   YYUSE (yyvaluep);
 413 ]b4_location_if([  YYUSE (yylocationp);
 414 ])dnl
 415 b4_parse_param_use[]dnl
 416 [
 417   if (!yymsg)
 418     yymsg = "Deleting";
 419   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 420
 421   switch (yytype)
 422     {
 423 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
 424       default:
 425         break;
 426     }
 427 }]dnl
 428 ])
 429
 430
 431 # b4_yysymprint_generate(FUNCTION-DECLARATOR)
 432 # -------------------------------------------
 433 # Generate the "yysymprint" function, which declaration is issued using
 434 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 435 # or "b4_c_function_def" for K&R.
 436 m4_define_default([b4_yysymprint_generate],
 437 [[/*--------------------------------.
 438 | Print this symbol on YYOUTPUT.  |
 439 `--------------------------------*/
 440
 441 ]$1([yysymprint],
 442     [static void],
 443                [[FILE *yyoutput],                       [yyoutput]],
 444                [[int yytype],                           [yytype]],
 445                [[const YYSTYPE * const yyvaluep],       [yyvaluep]][]dnl
 446 b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]dnl
 447 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 448 {
 449   YYUSE (yyvaluep);
 450 ]b4_location_if([  YYUSE (yylocationp);
 451 ])dnl
 452 b4_parse_param_use[]dnl
 453 [  if (yytype < YYNTOKENS)
 454     YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
 455   else
 456     YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
 457
 458 ]b4_location_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
 459   YYFPRINTF (yyoutput, ": ");
 460 ])dnl
 461 [
 462 # ifdef YYPRINT
 463   if (yytype < YYNTOKENS)
 464     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
 465 # endif
 466   switch (yytype)
 467     {
 468 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 469 [      default:
 470         break;
 471     }
 472   YYFPRINTF (yyoutput, ")");
 473 }]dnl
 474 ])