data/c.m4

   1 m4_divert(-1)                                               -*- Autoconf -*-
   2
   3 # C M4 Macros for Bison.
   4 # Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
  19 # 02111-1307  USA
  20
  21
  22 ## ---------------- ##
  23 ## Identification.  ##
  24 ## ---------------- ##
  25
  26 # b4_copyright(TITLE, YEARS)
  27 # --------------------------
  28 m4_define([b4_copyright],
  29 [/* A Bison parser, made from b4_filename, 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., 59 Temple Place - Suite 330,
  47    Boston, MA 02111-1307, USA.  */])
  48
  49
  50 # b4_identification
  51 # -----------------
  52 m4_define([b4_identification],
  53 [/* Identify Bison output.  */
  54 [#]define YYBISON 1
  55
  56 /* Skeleton name.  */
  57 [#]define YYSKELETON_NAME "b4_skeleton"
  58
  59 /* Pure parsers.  */
  60 [#]define YYPURE b4_pure
  61
  62 /* Using locations.  */
  63 [#]define YYLSP_NEEDED b4_locations_flag
  64 ])
  65
  66
  67
  68 ## ------------------------ ##
  69 ## Pure/impure interfaces.  ##
  70 ## ------------------------ ##
  71
  72
  73 # b4_user_args
  74 # ------------
  75 m4_define([b4_user_args],
  76 [m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
  77
  78
  79 # b4_parse_param
  80 # --------------
  81 # If defined, b4_parse_param arrives double quoted, but below we prefer
  82 # it to be single quoted.
  83 m4_define_default([b4_parse_param])
  84 m4_define([b4_parse_param],
  85 b4_parse_param))
  86
  87
  88
  89 ## ------------ ##
  90 ## Data Types.  ##
  91 ## ------------ ##
  92
  93
  94 # b4_ints_in(INT1, INT2, LOW, HIGH)
  95 # ---------------------------------
  96 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
  97 m4_define([b4_ints_in],
  98 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
  99
 100
 101 # b4_int_type(MIN, MAX)
 102 # ---------------------
 103 # Return the smallest int type able to handle numbers ranging from
 104 # MIN to MAX (included).
 105 m4_define([b4_int_type],
 106 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
 107        b4_ints_in($@,   [-128],   [127]), [1], [signed char],
 108
 109        b4_ints_in($@,      [0], [65535]), [1], [unsigned short],
 110        b4_ints_in($@, [-32768], [32767]), [1], [short],
 111
 112        m4_eval([0 <= $1]),                [1], [unsigned int],
 113
 114                                                [int])])
 115
 116
 117 # b4_int_type_for(NAME)
 118 # ---------------------
 119 # Return the smallest int type able to handle numbers ranging from
 120 # `NAME_min' to `NAME_max' (included).
 121 m4_define([b4_int_type_for],
 122 [b4_int_type($1_min, $1_max)])
 123
 124
 125 ## ------------------ ##
 126 ## Decoding options.  ##
 127 ## ------------------ ##
 128
 129
 130 # b4_location_if(IF-TRUE, IF-FALSE)
 131 # ---------------------------------
 132 # Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
 133 m4_define([b4_location_if],
 134 [m4_if(b4_locations_flag, [1],
 135        [$1],
 136        [$2])])
 137
 138
 139 # b4_pure_if(IF-TRUE, IF-FALSE)
 140 # -----------------------------
 141 # Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
 142 m4_define([b4_pure_if],
 143 [m4_if(b4_pure, [1],
 144        [$1],
 145        [$2])])
 146
 147
 148
 149 ## ------------------------- ##
 150 ## Assigning token numbers.  ##
 151 ## ------------------------- ##
 152
 153 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
 154 # -----------------------------------------
 155 # Output the definition of this token as #define.
 156 m4_define([b4_token_define],
 157 [#define $1 $2
 158 ])
 159
 160
 161 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
 162 # ---------------------------------------
 163 # Output the definition of this token as an enum.
 164 m4_define([b4_token_enum],
 165 [$1 = $2])
 166
 167
 168 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 169 # -------------------------------------------------------
 170 # Output the definition of the tokens (if there are) as enums and #define.
 171 m4_define([b4_token_defines],
 172 [m4_if([$@], [[]], [],
 173 [/* Tokens.  */
 174 #ifndef YYTOKENTYPE
 175 # define YYTOKENTYPE
 176    /* Put the tokens into the symbol table, so that GDB and other debuggers
 177       know about them.  */
 178    enum yytokentype {
 179 m4_map_sep([     b4_token_enum], [,
 180 ],
 181            [$@])
 182    };
 183 #endif
 184 m4_map([b4_token_define], [$@])
 185 ])
 186 ])
 187
 188
 189
 190 ## --------------------------------------------- ##
 191 ## Defining C functions in both K&R and ANSI-C.  ##
 192 ## --------------------------------------------- ##
 193
 194
 195 # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 196 # ----------------------------------------------------------
 197 # Declare the function NAME.
 198 m4_define([b4_c_function_def],
 199 [#if defined (__STDC__) || defined (__cplusplus)
 200 b4_c_ansi_function_def($@)
 201 #else
 202 $2
 203 $1 (b4_c_knr_formal_names(m4_shiftn(2, $@)))
 204 b4_c_knr_formal_decls(m4_shiftn(2, $@))
 205 #endif[]dnl
 206 ])
 207
 208
 209 # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 210 # ---------------------------------------------------------------
 211 # Declare the function NAME in ANSI.
 212 m4_define([b4_c_ansi_function_def],
 213 [$2
 214 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl
 215 ])
 216
 217
 218 # b4_c_ansi_formals([DECL1, NAME1], ...)
 219 # --------------------------------------
 220 # Output the arguments ANSI-C definition.
 221 m4_define([b4_c_ansi_formals],
 222 [m4_case([$@],
 223          [],   [void],
 224          [[]], [void],
 225                [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
 226
 227 m4_define([b4_c_ansi_formal],
 228 [$1])
 229
 230
 231 # b4_c_knr_formal_names([DECL1, NAME1], ...)
 232 # ------------------------------------------
 233 # Output the argument names.
 234 m4_define([b4_c_knr_formal_names],
 235 [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
 236
 237 m4_define([b4_c_knr_formal_name],
 238 [$2])
 239
 240
 241 # b4_c_knr_formal_decls([DECL1, NAME1], ...)
 242 # ------------------------------------------
 243 # Output the K&R argument declarations.
 244 m4_define([b4_c_knr_formal_decls],
 245 [m4_map_sep([b4_c_knr_formal_decl],
 246             [
 247 ],
 248             [$@])])
 249
 250 m4_define([b4_c_knr_formal_decl],
 251 [    $1;])
 252
 253
 254
 255 ## ------------------------------------------------------------ ##
 256 ## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
 257 ## ------------------------------------------------------------ ##
 258
 259
 260 # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 261 # -----------------------------------------------------------
 262 # Declare the function NAME.
 263 m4_define([b4_c_function_decl],
 264 [#if defined (__STDC__) || defined (__cplusplus)
 265 b4_c_ansi_function_decl($@)
 266 #else
 267 $2 $1 ();
 268 #endif[]dnl
 269 ])
 270
 271
 272 # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 273 # ----------------------------------------------------------------
 274 # Declare the function NAME.
 275 m4_define([b4_c_ansi_function_decl],
 276 [$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl
 277 ])
 278
 279
 280
 281
 282 ## --------------------- ##
 283 ## Calling C functions.  ##
 284 ## --------------------- ##
 285
 286
 287 # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
 288 # -----------------------------------------------------------
 289 # Call the function NAME with arguments NAME1, NAME2 etc.
 290 m4_define([b4_c_function_call],
 291 [$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
 292 ])
 293
 294
 295 # b4_c_args([DECL1, NAME1], ...)
 296 # ------------------------------
 297 # Output the arguments NAME1, NAME2...
 298 m4_define([b4_c_args],
 299 [m4_map_sep([b4_c_arg], [, ], [$@])])
 300
 301 m4_define([b4_c_arg],
 302 [$2])