[8833] | 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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