1 | /* Bytecode definition file parser. |
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2 | Copyright (C) 1993 Free Software Foundation, Inc. |
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3 | |
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4 | This file is part of GNU CC. |
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5 | |
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6 | GNU CC is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with GNU CC; see the file COPYING. If not, write to |
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18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | |
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22 | %{ |
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23 | |
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24 | #include <stdio.h> |
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25 | #include "hconfig.h" |
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26 | #include "bi-defs.h" |
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27 | |
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28 | extern char yytext[]; |
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29 | extern int yyleng; |
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30 | |
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31 | |
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32 | /* Chain of all defs built by the parser. */ |
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33 | struct def *defs; |
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34 | int ndefs; |
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35 | |
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36 | static struct node *makenode (); |
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37 | static struct variation *makevar (); |
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38 | static struct def *makedef (); |
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39 | |
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40 | void yyerror (); |
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41 | |
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42 | %} |
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43 | |
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44 | %union |
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45 | { |
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46 | char *string; |
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47 | struct def *def; |
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48 | struct variation *variation; |
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49 | struct node *node; |
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50 | } |
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51 | |
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52 | %token <string> DEFOP STRING |
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53 | %type <string> opt_string |
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54 | %type <def> defs def |
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55 | %type <variation> variations variation |
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56 | %type <node> list items item |
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57 | |
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58 | %% |
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59 | |
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60 | top: |
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61 | defs |
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62 | { defs = $1; } |
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63 | ; |
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64 | |
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65 | defs: |
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66 | def |
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67 | | defs def |
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68 | { $2->next = $1; $$ = $2; } |
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69 | ; |
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70 | |
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71 | def: |
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72 | DEFOP '(' STRING ',' opt_string ',' '(' variations ')' ')' |
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73 | { $$ = makedef ($3, $5, $8); } |
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74 | ; |
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75 | |
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76 | variations: |
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77 | variation |
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78 | | variations ',' variation |
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79 | { $3->next = $1; $$ = $3; } |
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80 | ; |
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81 | |
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82 | variation: |
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83 | '(' opt_string ')' |
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84 | { $$ = makevar ($2, (struct node *) NULL, (struct node *) NULL, (struct node *) NULL); } |
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85 | | '(' opt_string ',' list ')' |
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86 | { $$ = makevar ($2, $4, (struct node *) NULL, (struct node *) NULL); } |
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87 | | '(' opt_string ',' list ',' list ')' |
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88 | { $$ = makevar ($2, $4, $6, (struct node *) NULL); } |
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89 | | '(' opt_string ',' list ',' list ',' list ')' |
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90 | { $$ = makevar ($2, $4, $6, $8); } |
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91 | ; |
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92 | |
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93 | opt_string: |
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94 | /* empty */ { $$ = ""; } |
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95 | | STRING { $$ = $1; } |
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96 | ; |
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97 | |
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98 | list: |
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99 | '(' items ')' |
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100 | { $$ = $2; } |
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101 | | /* empty */ |
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102 | { $$ = NULL; } |
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103 | ; |
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104 | |
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105 | items: |
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106 | item |
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107 | /* Note right recursion. */ |
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108 | | item ',' items |
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109 | { $1->next = $3; $$ = $1; } |
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110 | ; |
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111 | |
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112 | item: |
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113 | STRING |
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114 | { $$ = makenode ($1); } |
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115 | ; |
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116 | |
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117 | %% |
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118 | |
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119 | static struct node * |
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120 | makenode (s) |
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121 | char *s; |
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122 | { |
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123 | struct node *n; |
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124 | |
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125 | n = (struct node *) malloc (sizeof (struct node)); |
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126 | n->text = s; |
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127 | n->next = NULL; |
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128 | return n; |
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129 | } |
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130 | |
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131 | static struct variation * |
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132 | makevar (name, inputs, outputs, literals) |
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133 | char *name; |
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134 | struct node *inputs, *outputs, *literals; |
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135 | { |
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136 | struct variation *v; |
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137 | |
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138 | v = (struct variation *) malloc (sizeof (struct variation)); |
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139 | v->name = name; |
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140 | v->code = ndefs++; |
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141 | v->inputs = inputs; |
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142 | v->outputs = outputs; |
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143 | v->literals = literals; |
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144 | v->next = NULL; |
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145 | return v; |
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146 | } |
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147 | |
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148 | static struct def * |
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149 | makedef (name, template, vars) |
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150 | char *name, *template; |
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151 | struct variation *vars; |
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152 | { |
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153 | struct def *d; |
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154 | |
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155 | d = (struct def *) malloc (sizeof (struct def)); |
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156 | d->basename = name; |
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157 | d->template = template; |
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158 | d->variations = vars; |
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159 | d->next = NULL; |
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160 | return d; |
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161 | } |
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162 | |
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163 | void |
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164 | yyerror (s) |
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165 | char *s; |
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166 | { |
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167 | fprintf (stderr, "syntax error in input\n"); |
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168 | exit (FATAL_EXIT_CODE); |
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169 | } |
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