data/c.m4

   1 m4_divert(-1)                                                     -*- C -*-
   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 ## Copuright.  ##
  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 ## ------------ ##
  51 ## Data Types.  ##
  52 ## ------------ ##
  53
  54
  55 # b4_ints_in(INT1, INT2, LOW, HIGH)
  56 # ---------------------------------
  57 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
  58 m4_define([b4_ints_in],
  59 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
  60
  61
  62 # b4_int_type(MIN, MAX)
  63 # ---------------------
  64 # Return the smallest int type able to handle numbers ranging from
  65 # MIN to MAX (included).
  66 m4_define([b4_int_type],
  67 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
  68        b4_ints_in($@,   [-128],   [128]), [1], [signed char],
  69
  70        b4_ints_in($@,      [0], [65535]), [1], [unsigned short],
  71        b4_ints_in($@, [-32768], [32767]), [1], [short],
  72
  73        m4_eval([0 <= $1]),                [1], [unsigned int],
  74
  75                                                [int])])
  76
  77 # b4_int_type_for(NAME)
  78 # ---------------------
  79 # Return the smallest int type able to handle numbers ranging from
  80 # `NAME_min' to `NAME_max' (included).
  81 m4_define([b4_int_type_for],
  82 [b4_int_type($1_min, $1_max)])
  83
  84
  85 ## ------------------------- ##
  86 ## Assigning token numbers.  ##
  87 ## ------------------------- ##
  88
  89 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
  90 # -----------------------------------------
  91 # Output the definition of this token as #define.
  92 m4_define([b4_token_define],
  93 [#define $1 $2
  94 ])
  95
  96
  97 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
  98 # ---------------------------------------
  99 # Output the definition of this token as an enum.
 100 m4_define([b4_token_enum],
 101 [$1 = $2])
 102
 103
 104 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 105 # -------------------------------------------------------
 106 # Output the definition of the tokens (if there are) as enums and #define.
 107 m4_define([b4_token_defines],
 108 [m4_if([$@], [[]], [],
 109 [/* Tokens.  */
 110 #if defined (__STDC__) || defined (__cplusplus)
 111    /* Put the tokens into the symbol table, so that GDB and other debuggers
 112       know about them.  */
 113    enum yytokentype {
 114 m4_map_sep([     b4_token_enum], [,
 115 ],
 116            [$@])
 117    };
 118 #endif
 119 m4_map([b4_token_define], [$@])
 120 ])
 121 ])
 122
 123
 124 ## ---------------------------------------------- ##
 125 ## Declaring C functions in both K&R and ANSI-C.  ##
 126 ## ---------------------------------------------- ##
 127
 128
 129 # b4_c_function(NAME, RETURN-VALUE, [TYPE1, NAME1], ...)
 130 # ------------------------------------------------
 131 # Declare the function NAME.
 132 m4_define([b4_c_function],
 133 [$2
 134 #if defined (__STDC__) || defined (__cplusplus)
 135 $1 (b4_c_ansi_args(m4_shiftn(2, $@)))
 136 #else
 137 $1 (b4_c_knr_arg_names(m4_shiftn(2, $@)))
 138 b4_c_knr_arg_decls(m4_shiftn(2, $@))
 139 #endif[]dnl
 140 ])
 141
 142
 143 # b4_c_ansi_args([TYPE1, NAME1], ...)
 144 # -----------------------------------
 145 # Output the arguments ANSI-C definition.
 146 m4_define([b4_c_ansi_args],
 147 [m4_map_sep([b4_c_ansi_arg], [, ], [$@])])
 148
 149 m4_define([b4_c_ansi_arg],
 150 [$1 $2])
 151
 152
 153 # b4_c_knr_args([TYPE1, NAME1], ...)
 154 # ----------------------------------
 155 # Output the argument names.
 156 m4_define([b4_c_knr_arg_names],
 157 [m4_map_sep([b4_c_knr_arg_name], [, ], [$@])])
 158
 159 m4_define([b4_c_knr_arg_name],
 160 [$2])
 161
 162
 163 # b4_c_knr_args([TYPE1, NAME1], ...)
 164 # ----------------------------------
 165 # Output the K&R argument declarations.
 166 m4_define([b4_c_knr_arg_decls],
 167 [m4_map_sep([b4_c_knr_arg_decl],
 168             [
 169 ],
 170             [$@])])
 171
 172 m4_define([b4_c_knr_arg_decl],
 173 [    $1 $2;])