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 /* As a special exception, when this file is copied by Bison into a
  50    Bison output file, you may use that output file without restriction.
  51    This special exception was added by the Free Software Foundation
  52    in version 1.24 of Bison.  */])
  53
  54
  55 ## ------------ ##
  56 ## Data Types.  ##
  57 ## ------------ ##
  58
  59
  60 # b4_ints_in(INT1, INT2, LOW, HIGH)
  61 # ---------------------------------
  62 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
  63 m4_define([b4_ints_in],
  64 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
  65
  66
  67 # b4_int_type(MIN, MAX)
  68 # ---------------------
  69 # Return the smallest int type able to handle numbers ranging from
  70 # MIN to MAX (included).
  71 m4_define([b4_int_type],
  72 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
  73        b4_ints_in($@,   [-128],   [128]), [1], [signed char],
  74
  75        b4_ints_in($@,      [0], [65535]), [1], [unsigned short],
  76        b4_ints_in($@, [-32768], [32767]), [1], [short],
  77
  78        m4_eval([0 <= $1]),                [1], [unsigned int],
  79
  80                                                [int])])
  81
  82 # b4_int_type_for(NAME)
  83 # ---------------------
  84 # Return the smallest int type able to handle numbers ranging from
  85 # `NAME_min' to `NAME_max' (included).
  86 m4_define([b4_int_type_for],
  87 [b4_int_type($1_min, $1_max)])
  88
  89
  90 ## ------------------------- ##
  91 ## Assigning token numbers.  ##
  92 ## ------------------------- ##
  93
  94 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
  95 # -----------------------------------------
  96 # Output the definition of this token as #define.
  97 m4_define([b4_token_define],
  98 [#define $1 $2
  99 ])
 100
 101
 102 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
 103 # ---------------------------------------
 104 # Output the definition of this token as an enum.
 105 m4_define([b4_token_enum],
 106 [$1 = $2])
 107
 108
 109 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
 110 # -------------------------------------------------------
 111 # Output the definition of the tokens (if there are) as enums and #define.
 112 m4_define([b4_token_defines],
 113 [m4_if([$@], [[]], [],
 114 [/* Tokens.  */
 115 #ifndef YYTOKENTYPE
 116 # if defined (__STDC__) || defined (__cplusplus)
 117    /* Put the tokens into the symbol table, so that GDB and other debuggers
 118       know about them.  */
 119    enum yytokentype {
 120 m4_map_sep([     b4_token_enum], [,
 121 ],
 122            [$@])
 123    };
 124 # endif
 125   /* POSIX requires `int' for tokens in interfaces.  */
 126 # define YYTOKENTYPE int
 127 #endif /* !YYTOKENTYPE */
 128 m4_map([b4_token_define], [$@])
 129 ])
 130 ])