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