data/c.m4

   1                                                             -*- Autoconf -*-
   2
   3 # C M4 Macros for Bison.
   4 # Copyright (C) 2002, 2004-2010 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 3 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, see <http://www.gnu.org/licenses/>.
  18
  19 ## ---------------- ##
  20 ## Identification.  ##
  21 ## ---------------- ##
  22
  23 # b4_comment(TEXT)
  24 # ----------------
  25 m4_define([b4_comment], [/* m4_bpatsubst([$1], [
  26 ], [
  27    ])  */])
  28
  29 # b4_identification
  30 # -----------------
  31 # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
  32 # b4_pull_flag if they use the values of the %define variables api.pure or
  33 # api.push_pull.
  34 m4_define([b4_identification],
  35 [[/* Identify Bison output.  */
  36 #define YYBISON 1
  37
  38 /* Bison version.  */
  39 #define YYBISON_VERSION "]b4_version["
  40
  41 /* Skeleton name.  */
  42 #define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
  43
  44 /* Pure parsers.  */
  45 #define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
  46
  47 /* Push parsers.  */
  48 #define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
  49
  50 /* Pull parsers.  */
  51 #define YYPULL ]b4_pull_flag])[
  52
  53 /* Using locations.  */
  54 #define YYLSP_NEEDED ]b4_locations_flag[
  55 ]])
  56
  57
  58 ## ---------------- ##
  59 ## Default values.  ##
  60 ## ---------------- ##
  61
  62 # If the %union is not named, its name is YYSTYPE.
  63 m4_define_default([b4_union_name], [YYSTYPE])
  64
  65 # If the %name-prefix is not given, it is yy.
  66 m4_define_default([b4_prefix], [yy])
  67
  68 ## ------------------------ ##
  69 ## Pure/impure interfaces.  ##
  70 ## ------------------------ ##
  71
  72 # b4_user_args
  73 # ------------
  74 m4_define([b4_user_args],
  75 [m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
  76
  77
  78 # b4_parse_param
  79 # --------------
  80 # If defined, b4_parse_param arrives double quoted, but below we prefer
  81 # it to be single quoted.
  82 m4_define([b4_parse_param],
  83 b4_parse_param)
  84
  85
  86 # b4_parse_param_for(DECL, FORMAL, BODY)
  87 # ---------------------------------------
  88 # Iterate over the user parameters, binding the declaration to DECL,
  89 # the formal name to FORMAL, and evaluating the BODY.
  90 m4_define([b4_parse_param_for],
  91 [m4_foreach([$1_$2], m4_defn([b4_parse_param]),
  92 [m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
  93 m4_pushdef([$2], m4_shift($1_$2))dnl
  94 $3[]dnl
  95 m4_popdef([$2])dnl
  96 m4_popdef([$1])dnl
  97 ])])
  98
  99 # b4_parse_param_use
 100 # ------------------
 101 # `YYUSE' all the parse-params.
 102 m4_define([b4_parse_param_use],
 103 [b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);
 104 ])dnl
 105 ])
 106
 107
 108 ## ------------ ##
 109 ## Data Types.  ##
 110 ## ------------ ##
 111
 112 # b4_int_type(MIN, MAX)
 113 # ---------------------
 114 # Return the smallest int type able to handle numbers ranging from
 115 # MIN to MAX (included).
 116 m4_define([b4_int_type],
 117 [m4_if(b4_ints_in($@,      [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 ## ---------##
 138 ## Values.  ##
 139 ## ---------##
 140
 141 # b4_null
 142 ---------
 143 # Return a null pointer constant.  NULL infringes on the user name
 144 # space in C, so use 0 rather than NULL.
 145 m4_define([b4_null], [0])
 146
 147
 148
 149
 150 ## ------------------------- ##
 151 ## Assigning token numbers.  ##
 152 ## ------------------------- ##
 153
 154 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
 155 # -----------------------------------------
 156 # Output the definition of this token as #define.
 157 m4_define([b4_token_define],
 158 [#define $1 $2
 159 ])
 160
 161
 162 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 163 # -------------------------------------------------------
 164 # Output the definition of the tokens (if there are) as #defines.
 165 m4_define([b4_token_defines],
 166 [m4_if([$#$1], [1], [],
 167 [/* Tokens.  */
 168 m4_map([b4_token_define], [$@])])
 169 ])
 170
 171
 172 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
 173 # ---------------------------------------
 174 # Output the definition of this token as an enum.
 175 m4_define([b4_token_enum],
 176 [$1 = $2])
 177
 178
 179 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 180 # -----------------------------------------------------
 181 # Output the definition of the tokens (if there are) as enums.
 182 m4_define([b4_token_enums],
 183 [m4_if([$#$1], [1], [],
 184 [/* Tokens.  */
 185 #ifndef YYTOKENTYPE
 186 # define YYTOKENTYPE
 187    /* Put the tokens into the symbol table, so that GDB and other debuggers
 188       know about them.  */
 189    enum yytokentype {
 190 m4_map_sep([     b4_token_enum], [,
 191 ],
 192            [$@])
 193    };
 194 #endif
 195 ])])
 196
 197
 198 # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 199 # -------------------------------------------------------------
 200 # Output the definition of the tokens (if there are any) as enums and, if POSIX
 201 # Yacc is enabled, as #defines.
 202 m4_define([b4_token_enums_defines],
 203 [b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
 204 ])
 205
 206
 207
 208 ## --------------------------------------------- ##
 209 ## Defining C functions in both K&R and ANSI-C.  ##
 210 ## --------------------------------------------- ##
 211
 212
 213 # b4_modern_c
 214 # -----------
 215 # A predicate useful in #if to determine whether C is ancient or modern.
 216 #
 217 # If __STDC__ is defined, the compiler is modern.  IBM xlc 7.0 when run
 218 # as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
 219 # reasons, but it defines __C99__FUNC__ so check that as well.
 220 # Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
 221 # Consider a C++ compiler to be modern if it defines __cplusplus.
 222 #
 223 m4_define([b4_c_modern],
 224   [[(defined __STDC__ || defined __C99__FUNC__ \
 225      || defined __cplusplus || defined _MSC_VER)]])
 226
 227 # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 228 # ----------------------------------------------------------
 229 # Declare the function NAME.
 230 m4_define([b4_c_function_def],
 231 [#if b4_c_modern
 232 b4_c_ansi_function_def($@)
 233 #else
 234 $2
 235 $1 (b4_c_knr_formal_names(m4_shift2($@)))
 236 b4_c_knr_formal_decls(m4_shift2($@))
 237 #endif[]dnl
 238 ])
 239
 240
 241 # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 242 # ---------------------------------------------------------------
 243 # Declare the function NAME in ANSI.
 244 m4_define([b4_c_ansi_function_def],
 245 [$2
 246 $1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
 247 ])
 248
 249
 250 # b4_c_ansi_formals([DECL1, NAME1], ...)
 251 # --------------------------------------
 252 # Output the arguments ANSI-C definition.
 253 m4_define([b4_c_ansi_formals],
 254 [m4_if([$#], [0], [void],
 255        [$#$1], [1], [void],
 256                [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
 257
 258 m4_define([b4_c_ansi_formal],
 259 [$1])
 260
 261
 262 # b4_c_knr_formal_names([DECL1, NAME1], ...)
 263 # ------------------------------------------
 264 # Output the argument names.
 265 m4_define([b4_c_knr_formal_names],
 266 [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
 267
 268 m4_define([b4_c_knr_formal_name],
 269 [$2])
 270
 271
 272 # b4_c_knr_formal_decls([DECL1, NAME1], ...)
 273 # ------------------------------------------
 274 # Output the K&R argument declarations.
 275 m4_define([b4_c_knr_formal_decls],
 276 [m4_map_sep([b4_c_knr_formal_decl],
 277             [
 278 ],
 279             [$@])])
 280
 281 m4_define([b4_c_knr_formal_decl],
 282 [    $1;])
 283
 284
 285
 286 ## ------------------------------------------------------------ ##
 287 ## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
 288 ## ------------------------------------------------------------ ##
 289
 290
 291 # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 292 # -----------------------------------------------------------
 293 # Declare the function NAME.
 294 m4_define([b4_c_function_decl],
 295 [#if defined __STDC__ || defined __cplusplus
 296 b4_c_ansi_function_decl($@)
 297 #else
 298 $2 $1 ();
 299 #endif[]dnl
 300 ])
 301
 302
 303 # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 304 # ----------------------------------------------------------------
 305 # Declare the function NAME.
 306 m4_define([b4_c_ansi_function_decl],
 307 [$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
 308 ])
 309
 310
 311
 312
 313 ## --------------------- ##
 314 ## Calling C functions.  ##
 315 ## --------------------- ##
 316
 317
 318 # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 319 # -----------------------------------------------------------
 320 # Call the function NAME with arguments NAME1, NAME2 etc.
 321 m4_define([b4_c_function_call],
 322 [$1 (b4_c_args(m4_shift2($@)))[]dnl
 323 ])
 324
 325
 326 # b4_c_args([DECL1, NAME1], ...)
 327 # ------------------------------
 328 # Output the arguments NAME1, NAME2...
 329 m4_define([b4_c_args],
 330 [m4_map_sep([b4_c_arg], [, ], [$@])])
 331
 332 m4_define([b4_c_arg],
 333 [$2])
 334
 335
 336 ## ----------- ##
 337 ## Synclines.  ##
 338 ## ----------- ##
 339
 340 # b4_sync_start(LINE, FILE)
 341 # -----------------------
 342 m4_define([b4_sync_start], [[#]line $1 $2])
 343
 344
 345 ## -------------- ##
 346 ## User actions.  ##
 347 ## -------------- ##
 348
 349 # b4_case(LABEL, STATEMENTS)
 350 # --------------------------
 351 m4_define([b4_case],
 352 [  case $1:
 353 $2
 354     break;])
 355
 356 # b4_symbol_actions(FILENAME, LINENO,
 357 #                   SYMBOL-TAG, SYMBOL-NUM,
 358 #                   SYMBOL-ACTION, SYMBOL-TYPENAME)
 359 # -------------------------------------------------
 360 m4_define([b4_symbol_actions],
 361 [m4_pushdef([b4_dollar_dollar],
 362    [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
 363 m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
 364       case $4: /* $3 */
 365 b4_syncline([$2], [$1])
 366         $5;
 367 b4_syncline([@oline@], [@ofile@])
 368         break;
 369 m4_popdef([b4_at_dollar])dnl
 370 m4_popdef([b4_dollar_dollar])dnl
 371 ])
 372
 373
 374 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 375 # -------------------------------------------
 376 # Generate the "yydestruct" function, which declaration is issued using
 377 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 378 # or "b4_c_function_def" for K&R.
 379 m4_define_default([b4_yydestruct_generate],
 380 [[/*-----------------------------------------------.
 381 | Release the memory associated to this symbol.  |
 382 `-----------------------------------------------*/
 383
 384 /*ARGSUSED*/
 385 ]$1([yydestruct],
 386     [static void],
 387     [[const char *yymsg],    [yymsg]],
 388     [[int yytype],           [yytype]],
 389     [[YYSTYPE *yyvaluep],    [yyvaluep]][]dnl
 390 b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 391 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 392 {
 393   YYUSE (yyvaluep);
 394 ]b4_locations_if([  YYUSE (yylocationp);
 395 ])dnl
 396 b4_parse_param_use[]dnl
 397 [
 398   if (!yymsg)
 399     yymsg = "Deleting";
 400   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 401
 402   switch (yytype)
 403     {
 404 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
 405       default:
 406         break;
 407     }
 408 }]dnl
 409 ])
 410
 411
 412 # b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
 413 # ------------------------------------------------
 414 # Generate the "yy_symbol_print" function, which declaration is issued using
 415 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
 416 # or "b4_c_function_def" for K&R.
 417 m4_define_default([b4_yy_symbol_print_generate],
 418 [[
 419 /*--------------------------------.
 420 | Print this symbol on YYOUTPUT.  |
 421 `--------------------------------*/
 422
 423 /*ARGSUSED*/
 424 ]$1([yy_symbol_value_print],
 425     [static void],
 426                [[FILE *yyoutput],                       [yyoutput]],
 427                [[int yytype],                           [yytype]],
 428                [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
 429 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 430 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 431 {
 432   if (!yyvaluep)
 433     return;
 434 ]b4_locations_if([  YYUSE (yylocationp);
 435 ])dnl
 436 b4_parse_param_use[]dnl
 437 [# ifdef YYPRINT
 438   if (yytype < YYNTOKENS)
 439     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
 440 # else
 441   YYUSE (yyoutput);
 442 # endif
 443   switch (yytype)
 444     {
 445 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 446 [      default:
 447         break;
 448     }
 449 }
 450
 451
 452 /*--------------------------------.
 453 | Print this symbol on YYOUTPUT.  |
 454 `--------------------------------*/
 455
 456 ]$1([yy_symbol_print],
 457     [static void],
 458                [[FILE *yyoutput],                       [yyoutput]],
 459                [[int yytype],                           [yytype]],
 460                [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
 461 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 462 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 463 {
 464   if (yytype < YYNTOKENS)
 465     YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
 466   else
 467     YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
 468
 469 ]b4_locations_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
 470   YYFPRINTF (yyoutput, ": ");
 471 ])dnl
 472 [  yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
 473 b4_locations_if([, yylocationp])[]b4_user_args[);
 474   YYFPRINTF (yyoutput, ")");
 475 }]dnl
 476 ])