gcc/gengtype-yacc.y

   1 /* -*- indented-text -*- */
   2 /* Process source files and output type information.
   3    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 %{
  23 #include "bconfig.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "gengtype.h"
  28 #define YYERROR_VERBOSE
  29 %}
  30
  31 %union {
  32   type_p t;
  33   pair_p p;
  34   options_p o;
  35   const char *s;
  36 }
  37
  38 %token <t>ENT_TYPEDEF_STRUCT
  39 %token <t>ENT_STRUCT
  40 %token ENT_EXTERNSTATIC
  41 %token ENT_YACCUNION
  42 %token GTY_TOKEN
  43 %token UNION
  44 %token STRUCT
  45 %token ENUM
  46 %token ALIAS
  47 %token NESTED_PTR
  48 %token <s>PARAM_IS
  49 %token NUM
  50 %token PERCENTPERCENT "%%"
  51 %token <t>SCALAR
  52 %token <s>ID
  53 %token <s>STRING
  54 %token <s>ARRAY
  55 %token <s>PERCENT_ID
  56 %token <s>CHAR
  57
  58 %type <p> struct_fields yacc_ids yacc_typematch
  59 %type <t> type lasttype
  60 %type <o> optionsopt options option optionseq optionseqopt
  61 %type <s> type_option stringseq
  62
  63 %%
  64
  65 start: /* empty */
  66        | typedef_struct start
  67        | externstatic start
  68        | yacc_union start
  69        ;
  70
  71 typedef_struct: ENT_TYPEDEF_STRUCT options '{' struct_fields '}' ID
  72                    {
  73                      new_structure ($1->u.s.tag, UNION_P ($1), &lexer_line,
  74                                     $4, $2);
  75                      do_typedef ($6, $1, &lexer_line);
  76                      lexer_toplevel_done = 1;
  77                    }
  78                  ';'
  79                    {}
  80                 | ENT_STRUCT options '{' struct_fields '}'
  81                    {
  82                      new_structure ($1->u.s.tag, UNION_P ($1), &lexer_line,
  83                                     $4, $2);
  84                      lexer_toplevel_done = 1;
  85                    }
  86                  ';'
  87                    {}
  88                 ;
  89
  90 externstatic: ENT_EXTERNSTATIC options lasttype ID semiequal
  91                  {
  92                    note_variable ($4, adjust_field_type ($3, $2), $2,
  93                                   &lexer_line);
  94                  }
  95               | ENT_EXTERNSTATIC options lasttype ID ARRAY semiequal
  96                  {
  97                    note_variable ($4, create_array ($3, $5),
  98                             $2, &lexer_line);
  99                  }
 100               | ENT_EXTERNSTATIC options lasttype ID ARRAY ARRAY semiequal
 101                  {
 102                    note_variable ($4, create_array (create_array ($3, $6),
 103                                               $5),
 104                             $2, &lexer_line);
 105                  }
 106               ;
 107
 108 lasttype: type
 109             {
 110               lexer_toplevel_done = 1;
 111               $$ = $1;
 112             }
 113             ;
 114
 115 semiequal: ';'
 116            | '='
 117            ;
 118
 119 yacc_union: ENT_YACCUNION options struct_fields '}' yacc_typematch
 120             PERCENTPERCENT
 121               {
 122                 note_yacc_type ($2, $3, $5, &lexer_line);
 123               }
 124             ;
 125
 126 yacc_typematch: /* empty */
 127                    { $$ = NULL; }
 128                 | yacc_typematch PERCENT_ID yacc_ids
 129                    {
 130                      pair_p p;
 131                      for (p = $3; p->next != NULL; p = p->next)
 132                        {
 133                          p->name = NULL;
 134                          p->type = NULL;
 135                        }
 136                      p->name = NULL;
 137                      p->type = NULL;
 138                      p->next = $1;
 139                      $$ = $3;
 140                    }
 141                 | yacc_typematch PERCENT_ID '<' ID '>' yacc_ids
 142                    {
 143                      pair_p p;
 144                      type_p newtype = NULL;
 145                      if (strcmp ($2, "type") == 0)
 146                        newtype = (type_p) 1;
 147                      for (p = $6; p->next != NULL; p = p->next)
 148                        {
 149                          p->name = $4;
 150                          p->type = newtype;
 151                        }
 152                      p->name = $4;
 153                      p->next = $1;
 154                      p->type = newtype;
 155                      $$ = $6;
 156                    }
 157                 ;
 158
 159 yacc_ids: /* empty */
 160         { $$ = NULL; }
 161      | yacc_ids ID
 162         {
 163           pair_p p = xcalloc (1, sizeof (*p));
 164           p->next = $1;
 165           p->line = lexer_line;
 166           p->opt = xmalloc (sizeof (*(p->opt)));
 167           p->opt->name = "tag";
 168           p->opt->next = NULL;
 169           p->opt->info = (char *)$2;
 170           $$ = p;
 171         }
 172      | yacc_ids CHAR
 173         {
 174           pair_p p = xcalloc (1, sizeof (*p));
 175           p->next = $1;
 176           p->line = lexer_line;
 177           p->opt = xmalloc (sizeof (*(p->opt)));
 178           p->opt->name = "tag";
 179           p->opt->next = NULL;
 180           p->opt->info = xasprintf ("'%s'", $2);
 181           $$ = p;
 182         }
 183      ;
 184
 185 struct_fields: { $$ = NULL; }
 186                | type optionsopt ID bitfieldopt ';' struct_fields
 187                   {
 188                     pair_p p = xmalloc (sizeof (*p));
 189                     p->type = adjust_field_type ($1, $2);
 190                     p->opt = $2;
 191                     p->name = $3;
 192                     p->next = $6;
 193                     p->line = lexer_line;
 194                     $$ = p;
 195                   }
 196                | type optionsopt ID ARRAY ';' struct_fields
 197                   {
 198                     pair_p p = xmalloc (sizeof (*p));
 199                     p->type = adjust_field_type (create_array ($1, $4), $2);
 200                     p->opt = $2;
 201                     p->name = $3;
 202                     p->next = $6;
 203                     p->line = lexer_line;
 204                     $$ = p;
 205                   }
 206                | type optionsopt ID ARRAY ARRAY ';' struct_fields
 207                   {
 208                     pair_p p = xmalloc (sizeof (*p));
 209                     p->type = create_array (create_array ($1, $5), $4);
 210                     p->opt = $2;
 211                     p->name = $3;
 212                     p->next = $7;
 213                     p->line = lexer_line;
 214                     $$ = p;
 215                   }
 216                | type ':' bitfieldlen ';' struct_fields
 217                   { $$ = $5; }
 218                ;
 219
 220 bitfieldopt: /* empty */
 221              | ':' bitfieldlen
 222              ;
 223
 224 bitfieldlen: NUM | ID
 225                 { }
 226              ;
 227
 228 type: SCALAR
 229          { $$ = $1; }
 230       | ID
 231          { $$ = resolve_typedef ($1, &lexer_line); }
 232       | type '*'
 233          { $$ = create_pointer ($1); }
 234       | STRUCT ID '{' struct_fields '}'
 235          {
 236            new_structure ($2, 0, &lexer_line, $4, NULL);
 237            $$ = find_structure ($2, 0);
 238          }
 239       | STRUCT ID
 240          { $$ = find_structure ($2, 0); }
 241       | UNION ID '{' struct_fields '}'
 242          {
 243            new_structure ($2, 1, &lexer_line, $4, NULL);
 244            $$ = find_structure ($2, 1);
 245          }
 246       | UNION ID
 247          { $$ = find_structure ($2, 1); }
 248       | ENUM ID
 249          { $$ = create_scalar_type ($2, strlen ($2)); }
 250       | ENUM ID '{' enum_items '}'
 251          { $$ = create_scalar_type ($2, strlen ($2)); }
 252       ;
 253
 254 enum_items: /* empty */
 255             | ID '=' NUM ',' enum_items
 256               { }
 257             | ID ',' enum_items
 258               { }
 259             | ID enum_items
 260               { }
 261             ;
 262
 263 optionsopt: { $$ = NULL; }
 264             | options { $$ = $1; }
 265             ;
 266
 267 options: GTY_TOKEN '(' '(' optionseqopt ')' ')'
 268            { $$ = $4; }
 269          ;
 270
 271 type_option : ALIAS
 272                 { $$ = "ptr_alias"; }
 273               | PARAM_IS
 274                 { $$ = $1; }
 275               ;
 276
 277 option:   ID
 278             { $$ = create_option ($1, (void *)""); }
 279         | ID '(' stringseq ')'
 280             { $$ = create_option ($1, (void *)$3); }
 281         | type_option '(' type ')'
 282             { $$ = create_option ($1, adjust_field_type ($3, NULL)); }
 283         | NESTED_PTR '(' type ',' stringseq ',' stringseq ')'
 284             {
 285               struct nested_ptr_data d =
 286                 { adjust_field_type ($3, NULL), $5, $7 };
 287               $$ = create_option ("nested_ptr",
 288                                   xmemdup (&d, sizeof (d), sizeof (d)));
 289             }
 290         ;
 291
 292 optionseq: option
 293               {
 294                 $1->next = NULL;
 295                 $$ = $1;
 296               }
 297             | optionseq ',' option
 298               {
 299                 $3->next = $1;
 300                 $$ = $3;
 301               }
 302             ;
 303
 304 optionseqopt: { $$ = NULL; }
 305               | optionseq { $$ = $1; }
 306               ;
 307
 308 stringseq: STRING
 309              { $$ = $1; }
 310            | stringseq STRING
 311              {
 312                size_t l1 = strlen ($1);
 313                size_t l2 = strlen ($2);
 314                char *s = xrealloc ((char *)$1, l1 + l2 + 1);
 315                memcpy (s + l1, $2, l2 + 1);
 316                free ((void *)$2);
 317                $$ = s;
 318              }
 319            ;
 320 %%