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/* -*- indented-text -*- */
/* Process source files and output type information.
   Copyright (C) 2002, 2004, 2007 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

%{
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "gengtype.h"
#define YYERROR_VERBOSE
%}

%union {
  type_p t;
  pair_p p;
  options_p o;
  const char *s;
}

%token <t>ENT_TYPEDEF_STRUCT
%token <t>ENT_STRUCT
%token ENT_EXTERNSTATIC
%token ENT_YACCUNION
%token GTY_TOKEN
%token UNION
%token STRUCT
%token ENUM
%token ALIAS
%token NESTED_PTR
%token <s>PARAM_IS
%token NUM
%token PERCENTPERCENT "%%"
%token <t>SCALAR
%token <s>ID
%token <s>STRING
%token <s>ARRAY
%token <s>PERCENT_ID
%token <s>CHAR

%type <p> struct_fields yacc_ids yacc_typematch
%type <t> type lasttype
%type <o> optionsopt options option optionseq optionseqopt
%type <s> type_option stringseq

%%

start: /* empty */
       | typedef_struct start
       | externstatic start
       | yacc_union start
       ;

typedef_struct: ENT_TYPEDEF_STRUCT options '{' struct_fields '}' ID
                   {
                     new_structure ($1->u.s.tag, UNION_P ($1), &lexer_line,
                                    $4, $2);
                     do_typedef ($6, $1, &lexer_line);
                     lexer_toplevel_done = 1;
                   }
                 ';'
                   {}
                | ENT_STRUCT options '{' struct_fields '}'
                   {
                     new_structure ($1->u.s.tag, UNION_P ($1), &lexer_line,
                                    $4, $2);
                     lexer_toplevel_done = 1;
                   }
                 ';'
                   {}
                ;

externstatic: ENT_EXTERNSTATIC options lasttype ID semiequal
                 {
                   note_variable ($4, adjust_field_type ($3, $2), $2,
                                  &lexer_line);
                 }
              | ENT_EXTERNSTATIC options lasttype ID ARRAY semiequal
                 {
                   note_variable ($4, create_array ($3, $5),
                            $2, &lexer_line);
                 }
              | ENT_EXTERNSTATIC options lasttype ID ARRAY ARRAY semiequal
                 {
                   note_variable ($4, create_array (create_array ($3, $6),
                                              $5),
                            $2, &lexer_line);
                 }
              ;

lasttype: type
            {
              lexer_toplevel_done = 1;
              $$ = $1;
            }
            ;

semiequal: ';'
           | '='
           ;

yacc_union: ENT_YACCUNION options struct_fields '}' yacc_typematch
            PERCENTPERCENT
              {
                note_yacc_type ($2, $3, $5, &lexer_line);
              }
            ;

yacc_typematch: /* empty */
                   { $$ = NULL; }
                | yacc_typematch PERCENT_ID yacc_ids
                   {
                     pair_p p;
                     for (p = $3; p->next != NULL; p = p->next)
                       {
                         p->name = NULL;
                         p->type = NULL;
                       }
                     p->name = NULL;
                     p->type = NULL;
                     p->next = $1;
                     $$ = $3;
                   }
                | yacc_typematch PERCENT_ID '<' ID '>' yacc_ids
                   {
                     pair_p p;
                     type_p newtype = NULL;
                     if (strcmp ($2, "type") == 0)
                       newtype = (type_p) 1;
                     for (p = $6; p->next != NULL; p = p->next)
                       {
                         p->name = $4;
                         p->type = newtype;
                       }
                     p->name = $4;
                     p->next = $1;
                     p->type = newtype;
                     $$ = $6;
                   }
                ;

yacc_ids: /* empty */
        { $$ = NULL; }
     | yacc_ids ID
        {
          pair_p p = XCNEW (struct pair);
          p->next = $1;
          p->line = lexer_line;
          p->opt = XNEW (struct options);
          p->opt->name = "tag";
          p->opt->next = NULL;
          p->opt->info = (char *)$2;
          $$ = p;
        }
     | yacc_ids CHAR
        {
          pair_p p = XCNEW (struct pair);
          p->next = $1;
          p->line = lexer_line;
          p->opt = XNEW (struct options);
          p->opt->name = "tag";
          p->opt->next = NULL;
          p->opt->info = xasprintf ("'%s'", $2);
          $$ = p;
        }
     ;

struct_fields: { $$ = NULL; }
               | type optionsopt ID bitfieldopt ';' struct_fields
                  {
                    pair_p p = XNEW (struct pair);
                    p->type = adjust_field_type ($1, $2);
                    p->opt = $2;
                    p->name = $3;
                    p->next = $6;
                    p->line = lexer_line;
                    $$ = p;
                  }
               | type optionsopt ID ARRAY ';' struct_fields
                  {
                    pair_p p = XNEW (struct pair);
                    p->type = adjust_field_type (create_array ($1, $4), $2);
                    p->opt = $2;
                    p->name = $3;
                    p->next = $6;
                    p->line = lexer_line;
                    $$ = p;
                  }
               | type optionsopt ID ARRAY ARRAY ';' struct_fields
                  {
                    pair_p p = XNEW (struct pair);
                    p->type = create_array (create_array ($1, $5), $4);
                    p->opt = $2;
                    p->name = $3;
                    p->next = $7;
                    p->line = lexer_line;
                    $$ = p;
                  }
               | type ':' bitfieldlen ';' struct_fields
                  { $$ = $5; }
               ;

bitfieldopt: /* empty */
             | ':' bitfieldlen
             ;

bitfieldlen: NUM | ID
                { }
             ;

type: SCALAR
         { $$ = $1; }
      | ID
         { $$ = resolve_typedef ($1, &lexer_line); }
      | type '*'
         { $$ = create_pointer ($1); }
      | STRUCT ID '{' struct_fields '}'
         { $$ = new_structure ($2, 0, &lexer_line, $4, NULL); }
      | STRUCT ID
         { $$ = find_structure ($2, 0); }
      | UNION ID '{' struct_fields '}'
         { $$ = new_structure ($2, 1, &lexer_line, $4, NULL); }
      | UNION ID
         { $$ = find_structure ($2, 1); }
      | ENUM ID
         { $$ = create_scalar_type ($2, strlen ($2)); }
      | ENUM ID '{' enum_items '}'
         { $$ = create_scalar_type ($2, strlen ($2)); }
      ;

enum_items: /* empty */
            | ID '=' NUM ',' enum_items
              { }
            | ID ',' enum_items
              { }
            | ID enum_items
              { }
            ;

optionsopt: { $$ = NULL; }
            | options { $$ = $1; }
            ;

options: GTY_TOKEN '(' '(' optionseqopt ')' ')'
           { $$ = $4; }
         ;

type_option : ALIAS
                { $$ = "ptr_alias"; }
              | PARAM_IS
                { $$ = $1; }
              ;

option:   ID
            { $$ = create_option (NULL, $1, (void *)""); }
        | ID '(' stringseq ')'
            { $$ = create_option (NULL, $1, (void *)$3); }
        | type_option '(' type ')'
            { $$ = create_option (NULL, $1, adjust_field_type ($3, NULL)); }
        | NESTED_PTR '(' type ',' stringseq ',' stringseq ')'
            {
              struct nested_ptr_data d;

              d.type = adjust_field_type ($3, NULL);
              d.convert_to = $5;
              d.convert_from = $7;
              $$ = create_option (NULL, "nested_ptr",
                                  xmemdup (&d, sizeof (d), sizeof (d)));
            }
        ;

optionseq: option
              {
                $1->next = NULL;
                $$ = $1;
              }
            | optionseq ',' option
              {
                $3->next = $1;
                $$ = $3;
              }
            ;

optionseqopt: { $$ = NULL; }
              | optionseq { $$ = $1; }
              ;

stringseq: STRING
             { $$ = $1; }
           | stringseq STRING
             {
               size_t l1 = strlen ($1);
               size_t l2 = strlen ($2);
               char *s = XRESIZEVEC (char, $1, l1 + l2 + 1);
               memcpy (s + l1, $2, l2 + 1);
               XDELETE ($2);
               $$ = s;
             }
           ;
%%