1 | -*- Autoconf -*-
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2 |
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3 | # C M4 Macros for Bison.
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4 | # Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
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5 | # Foundation, Inc.
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6 |
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7 | # This program is free software: you can redistribute it and/or modify
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8 | # it under the terms of the GNU General Public License as published by
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9 | # the Free Software Foundation, either version 3 of the License, or
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10 | # (at your option) any later version.
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11 | #
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12 | # This program is distributed in the hope that it will be useful,
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | # GNU General Public License for more details.
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16 | #
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17 | # You should have received a copy of the GNU General Public License
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18 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 |
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20 | ## ---------------- ##
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21 | ## Identification. ##
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22 | ## ---------------- ##
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23 |
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24 | # b4_comment(TEXT)
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25 | # ----------------
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26 | m4_define([b4_comment], [/* m4_bpatsubst([$1], [
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27 | ], [
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28 | ]) */])
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29 |
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30 | # b4_identification
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31 | # -----------------
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32 | # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
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33 | # b4_pull_flag if they use the values of the %define variables api.pure or
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34 | # api.push_pull.
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35 | m4_define([b4_identification],
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36 | [[/* Identify Bison output. */
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37 | #define YYBISON 1
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38 |
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39 | /* Bison version. */
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40 | #define YYBISON_VERSION "]b4_version["
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41 |
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42 | /* Skeleton name. */
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43 | #define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
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44 |
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45 | /* Pure parsers. */
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46 | #define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
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47 |
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48 | /* Push parsers. */
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49 | #define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
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50 |
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51 | /* Pull parsers. */
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52 | #define YYPULL ]b4_pull_flag])[
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53 |
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54 | /* Using locations. */
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55 | #define YYLSP_NEEDED ]b4_locations_flag[
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56 | ]])
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57 |
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58 |
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59 | ## ---------------- ##
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60 | ## Default values. ##
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61 | ## ---------------- ##
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62 |
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63 | # If the %union is not named, its name is YYSTYPE.
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64 | m4_define_default([b4_union_name], [YYSTYPE])
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65 |
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66 | # If the %name-prefix is not given, it is yy.
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67 | m4_define_default([b4_prefix], [yy])
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68 |
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69 | ## ------------------------ ##
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70 | ## Pure/impure interfaces. ##
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71 | ## ------------------------ ##
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72 |
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73 | # b4_user_args
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74 | # ------------
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75 | m4_define([b4_user_args],
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76 | [m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
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77 |
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78 |
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79 | # b4_parse_param
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80 | # --------------
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81 | # If defined, b4_parse_param arrives double quoted, but below we prefer
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82 | # it to be single quoted.
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83 | m4_define([b4_parse_param],
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84 | b4_parse_param)
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85 |
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86 |
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87 | # b4_parse_param_for(DECL, FORMAL, BODY)
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88 | # ---------------------------------------
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89 | # Iterate over the user parameters, binding the declaration to DECL,
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90 | # the formal name to FORMAL, and evaluating the BODY.
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91 | m4_define([b4_parse_param_for],
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92 | [m4_foreach([$1_$2], m4_defn([b4_parse_param]),
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93 | [m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
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94 | m4_pushdef([$2], m4_shift($1_$2))dnl
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95 | $3[]dnl
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96 | m4_popdef([$2])dnl
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97 | m4_popdef([$1])dnl
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98 | ])])
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99 |
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100 | # b4_parse_param_use
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101 | # ------------------
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102 | # `YYUSE' all the parse-params.
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103 | m4_define([b4_parse_param_use],
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104 | [b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
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105 | ])dnl
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106 | ])
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107 |
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108 |
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109 | ## ------------ ##
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110 | ## Data Types. ##
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111 | ## ------------ ##
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112 |
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113 | # b4_int_type(MIN, MAX)
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114 | # ---------------------
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115 | # Return the smallest int type able to handle numbers ranging from
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116 | # MIN to MAX (included).
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117 | m4_define([b4_int_type],
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118 | [m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
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119 | b4_ints_in($@, [-128], [127]), [1], [signed char],
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120 |
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121 | b4_ints_in($@, [0], [65535]), [1], [unsigned short int],
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122 | b4_ints_in($@, [-32768], [32767]), [1], [short int],
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123 |
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124 | m4_eval([0 <= $1]), [1], [unsigned int],
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125 |
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126 | [int])])
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127 |
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128 |
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129 | # b4_int_type_for(NAME)
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130 | # ---------------------
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131 | # Return the smallest int type able to handle numbers ranging from
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132 | # `NAME_min' to `NAME_max' (included).
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133 | m4_define([b4_int_type_for],
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134 | [b4_int_type($1_min, $1_max)])
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135 |
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136 |
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137 |
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138 | ## ---------##
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139 | ## Values. ##
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140 | ## ---------##
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141 |
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142 | # b4_null
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143 | ---------
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144 | # Return a null pointer constant. NULL infringes on the user name
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145 | # space in C, so use 0 rather than NULL.
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146 | m4_define([b4_null], [0])
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147 |
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148 |
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149 |
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150 |
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151 | ## ------------------------- ##
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152 | ## Assigning token numbers. ##
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153 | ## ------------------------- ##
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154 |
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155 | # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
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156 | # -----------------------------------------
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157 | # Output the definition of this token as #define.
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158 | m4_define([b4_token_define],
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159 | [#define $1 $2
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160 | ])
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161 |
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162 |
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163 | # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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164 | # -------------------------------------------------------
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165 | # Output the definition of the tokens (if there are) as #defines.
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166 | m4_define([b4_token_defines],
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167 | [m4_if([$#$1], [1], [],
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168 | [/* Tokens. */
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169 | m4_map([b4_token_define], [$@])])
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170 | ])
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171 |
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172 |
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173 | # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
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174 | # ---------------------------------------
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175 | # Output the definition of this token as an enum.
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176 | m4_define([b4_token_enum],
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177 | [$1 = $2])
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178 |
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179 |
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180 | # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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181 | # -----------------------------------------------------
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182 | # Output the definition of the tokens (if there are) as enums.
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183 | m4_define([b4_token_enums],
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184 | [m4_if([$#$1], [1], [],
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185 | [/* Tokens. */
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186 | #ifndef YYTOKENTYPE
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187 | # define YYTOKENTYPE
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188 | /* Put the tokens into the symbol table, so that GDB and other debuggers
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189 | know about them. */
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190 | enum yytokentype {
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191 | m4_map_sep([ b4_token_enum], [,
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192 | ],
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193 | [$@])
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194 | };
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195 | #endif
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196 | ])])
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197 |
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198 |
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199 | # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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200 | # -------------------------------------------------------------
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201 | # Output the definition of the tokens (if there are any) as enums and, if POSIX
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202 | # Yacc is enabled, as #defines.
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203 | m4_define([b4_token_enums_defines],
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204 | [b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
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205 | ])
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206 |
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207 |
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208 |
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209 | ## --------------------------------------------- ##
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210 | ## Defining C functions in both K&R and ANSI-C. ##
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211 | ## --------------------------------------------- ##
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212 |
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213 |
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214 | # b4_modern_c
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215 | # -----------
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216 | # A predicate useful in #if to determine whether C is ancient or modern.
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217 | #
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218 | # If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run
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219 | # as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
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220 | # reasons, but it defines __C99__FUNC__ so check that as well.
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221 | # Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
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222 | # Consider a C++ compiler to be modern if it defines __cplusplus.
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223 | #
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224 | m4_define([b4_c_modern],
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225 | [[(defined __STDC__ || defined __C99__FUNC__ \
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226 | || defined __cplusplus || defined _MSC_VER)]])
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227 |
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228 | # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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229 | # ----------------------------------------------------------
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230 | # Declare the function NAME.
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231 | m4_define([b4_c_function_def],
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232 | [#if b4_c_modern
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233 | b4_c_ansi_function_def($@)
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234 | #else
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235 | $2
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236 | $1 (b4_c_knr_formal_names(m4_shift2($@)))
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237 | b4_c_knr_formal_decls(m4_shift2($@))
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238 | #endif[]dnl
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239 | ])
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240 |
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241 |
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242 | # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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243 | # ---------------------------------------------------------------
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244 | # Declare the function NAME in ANSI.
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245 | m4_define([b4_c_ansi_function_def],
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246 | [$2
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247 | $1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
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248 | ])
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249 |
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250 |
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251 | # b4_c_ansi_formals([DECL1, NAME1], ...)
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252 | # --------------------------------------
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253 | # Output the arguments ANSI-C definition.
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254 | m4_define([b4_c_ansi_formals],
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255 | [m4_if([$#], [0], [void],
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256 | [$#$1], [1], [void],
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257 | [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
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258 |
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259 | m4_define([b4_c_ansi_formal],
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260 | [$1])
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261 |
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262 |
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263 | # b4_c_knr_formal_names([DECL1, NAME1], ...)
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264 | # ------------------------------------------
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265 | # Output the argument names.
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266 | m4_define([b4_c_knr_formal_names],
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267 | [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
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268 |
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269 | m4_define([b4_c_knr_formal_name],
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270 | [$2])
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271 |
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272 |
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273 | # b4_c_knr_formal_decls([DECL1, NAME1], ...)
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274 | # ------------------------------------------
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275 | # Output the K&R argument declarations.
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276 | m4_define([b4_c_knr_formal_decls],
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277 | [m4_map_sep([b4_c_knr_formal_decl],
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278 | [
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279 | ],
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280 | [$@])])
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281 |
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282 | m4_define([b4_c_knr_formal_decl],
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283 | [ $1;])
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284 |
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285 |
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286 |
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287 | ## ------------------------------------------------------------ ##
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288 | ## Declaring (prototyping) C functions in both K&R and ANSI-C. ##
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289 | ## ------------------------------------------------------------ ##
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290 |
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291 |
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292 | # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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293 | # -----------------------------------------------------------
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294 | # Declare the function NAME.
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295 | m4_define([b4_c_function_decl],
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296 | [#if defined __STDC__ || defined __cplusplus
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297 | b4_c_ansi_function_decl($@)
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298 | #else
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299 | $2 $1 ();
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300 | #endif[]dnl
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301 | ])
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302 |
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303 |
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304 | # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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305 | # ----------------------------------------------------------------
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306 | # Declare the function NAME.
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307 | m4_define([b4_c_ansi_function_decl],
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308 | [$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
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309 | ])
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310 |
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311 |
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312 |
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313 |
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314 | ## --------------------- ##
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315 | ## Calling C functions. ##
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316 | ## --------------------- ##
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317 |
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318 |
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319 | # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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320 | # -----------------------------------------------------------
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321 | # Call the function NAME with arguments NAME1, NAME2 etc.
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322 | m4_define([b4_c_function_call],
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323 | [$1 (b4_c_args(m4_shift2($@)))[]dnl
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324 | ])
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325 |
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326 |
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327 | # b4_c_args([DECL1, NAME1], ...)
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328 | # ------------------------------
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329 | # Output the arguments NAME1, NAME2...
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330 | m4_define([b4_c_args],
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331 | [m4_map_sep([b4_c_arg], [, ], [$@])])
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332 |
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333 | m4_define([b4_c_arg],
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334 | [$2])
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335 |
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336 |
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337 | ## ----------- ##
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338 | ## Synclines. ##
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339 | ## ----------- ##
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340 |
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341 | # b4_sync_start(LINE, FILE)
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342 | # -----------------------
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343 | m4_define([b4_sync_start], [[#]line $1 $2])
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344 |
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345 |
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346 | ## -------------- ##
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347 | ## User actions. ##
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348 | ## -------------- ##
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349 |
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350 | # b4_case(LABEL, STATEMENTS)
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351 | # --------------------------
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352 | m4_define([b4_case],
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353 | [ case $1:
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354 | $2
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355 | break;])
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356 |
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357 | # b4_symbol_actions(FILENAME, LINENO,
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358 | # SYMBOL-TAG, SYMBOL-NUM,
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359 | # SYMBOL-ACTION, SYMBOL-TYPENAME)
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360 | # -------------------------------------------------
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361 | m4_define([b4_symbol_actions],
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362 | [m4_pushdef([b4_dollar_dollar],
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363 | [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
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364 | m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
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365 | case $4: /* $3 */
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366 | b4_syncline([$2], [$1])
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367 | $5;
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368 | b4_syncline([@oline@], [@ofile@])
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369 | break;
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370 | m4_popdef([b4_at_dollar])dnl
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371 | m4_popdef([b4_dollar_dollar])dnl
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372 | ])
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373 |
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374 |
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375 | # b4_yydestruct_generate(FUNCTION-DECLARATOR)
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376 | # -------------------------------------------
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377 | # Generate the "yydestruct" function, which declaration is issued using
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378 | # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
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379 | # or "b4_c_function_def" for K&R.
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380 | m4_define_default([b4_yydestruct_generate],
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381 | [[/*-----------------------------------------------.
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382 | | Release the memory associated to this symbol. |
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383 | `-----------------------------------------------*/
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384 |
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385 | /*ARGSUSED*/
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386 | ]$1([yydestruct],
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387 | [static void],
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388 | [[const char *yymsg], [yymsg]],
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389 | [[int yytype], [yytype]],
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390 | [[YYSTYPE *yyvaluep], [yyvaluep]][]dnl
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391 | b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
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392 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
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393 | {
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394 | YYUSE (yyvaluep);
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395 | ]b4_locations_if([ YYUSE (yylocationp);
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396 | ])dnl
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397 | b4_parse_param_use[]dnl
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398 | [
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399 | if (!yymsg)
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400 | yymsg = "Deleting";
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401 | YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
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402 |
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403 | switch (yytype)
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404 | {
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405 | ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
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406 | default:
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407 | break;
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408 | }
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409 | }]dnl
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410 | ])
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411 |
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412 |
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413 | # b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
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414 | # ------------------------------------------------
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415 | # Generate the "yy_symbol_print" function, which declaration is issued using
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416 | # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
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417 | # or "b4_c_function_def" for K&R.
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418 | m4_define_default([b4_yy_symbol_print_generate],
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419 | [[
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420 | /*--------------------------------.
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421 | | Print this symbol on YYOUTPUT. |
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422 | `--------------------------------*/
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423 |
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424 | /*ARGSUSED*/
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425 | ]$1([yy_symbol_value_print],
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426 | [static void],
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427 | [[FILE *yyoutput], [yyoutput]],
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428 | [[int yytype], [yytype]],
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429 | [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
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430 | b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
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431 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
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432 | {
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433 | if (!yyvaluep)
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434 | return;
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435 | ]b4_locations_if([ YYUSE (yylocationp);
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436 | ])dnl
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437 | b4_parse_param_use[]dnl
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438 | [# ifdef YYPRINT
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439 | if (yytype < YYNTOKENS)
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440 | YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
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441 | # else
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442 | YYUSE (yyoutput);
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443 | # endif
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444 | switch (yytype)
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445 | {
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446 | ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
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447 | [ default:
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448 | break;
|
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449 | }
|
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450 | }
|
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451 |
|
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452 |
|
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453 | /*--------------------------------.
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454 | | Print this symbol on YYOUTPUT. |
|
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455 | `--------------------------------*/
|
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456 |
|
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457 | ]$1([yy_symbol_print],
|
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458 | [static void],
|
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459 | [[FILE *yyoutput], [yyoutput]],
|
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460 | [[int yytype], [yytype]],
|
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461 | [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
|
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462 | b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
|
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463 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
|
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464 | {
|
---|
465 | if (yytype < YYNTOKENS)
|
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466 | YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
|
---|
467 | else
|
---|
468 | YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
|
---|
469 |
|
---|
470 | ]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
|
---|
471 | YYFPRINTF (yyoutput, ": ");
|
---|
472 | ])dnl
|
---|
473 | [ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
|
---|
474 | b4_locations_if([, yylocationp])[]b4_user_args[);
|
---|
475 | YYFPRINTF (yyoutput, ")");
|
---|
476 | }]dnl
|
---|
477 | ])
|
---|