src/symlist.c

   1 /* Lists of symbols for Bison
   2
   3    Copyright (C) 2002, 2005, 2006, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of Bison, the GNU Compiler Compiler.
   6
   7    This program is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <config.h>
  21 #include "system.h"
  22
  23 #include "complain.h"
  24 #include "symlist.h"
  25
  26
  27 /*--------------------------------------.
  28 | Create a list containing SYM at LOC.  |
  29 `--------------------------------------*/
  30
  31 symbol_list *
  32 symbol_list_sym_new (symbol *sym, location loc)
  33 {
  34   symbol_list *res = xmalloc (sizeof *res);
  35
  36   res->content_type = SYMLIST_SYMBOL;
  37   res->content.sym = sym;
  38   res->location = loc;
  39
  40   res->midrule = NULL;
  41   res->midrule_parent_rule = NULL;
  42   res->midrule_parent_rhs_index = 0;
  43
  44   code_props_none_init (&res->action_props);
  45
  46   res->ruleprec = NULL;
  47   res->dprec = 0;
  48   res->merger = 0;
  49
  50   res->next = NULL;
  51
  52   return res;
  53 }
  54
  55
  56 /*--------------------------------------------.
  57 | Create a list containing TYPE_NAME at LOC.  |
  58 `--------------------------------------------*/
  59
  60 symbol_list *
  61 symbol_list_type_new (uniqstr type_name, location loc)
  62 {
  63   symbol_list *res = xmalloc (sizeof *res);
  64
  65   res->content_type = SYMLIST_TYPE;
  66   res->content.type_name = type_name;
  67   res->location = loc;
  68   res->next = NULL;
  69
  70   return res;
  71 }
  72
  73
  74 /*----------------------------------------.
  75 | Create a list containing a <*> at LOC.  |
  76 `----------------------------------------*/
  77
  78 symbol_list *
  79 symbol_list_default_tagged_new (location loc)
  80 {
  81   symbol_list *res = xmalloc (sizeof *res);
  82
  83   res->content_type = SYMLIST_DEFAULT_TAGGED;
  84   res->location = loc;
  85   res->next = NULL;
  86
  87   return res;
  88 }
  89
  90
  91 /*---------------------------------------.
  92 | Create a list containing a <> at LOC.  |
  93 `---------------------------------------*/
  94
  95 symbol_list *
  96 symbol_list_default_tagless_new (location loc)
  97 {
  98   symbol_list *res = xmalloc (sizeof *res);
  99
 100   res->content_type = SYMLIST_DEFAULT_TAGLESS;
 101   res->location = loc;
 102   res->next = NULL;
 103
 104   return res;
 105 }
 106
 107
 108 /*-----------------------------------------------------------------------.
 109 | Print this list, for which every content_type must be SYMLIST_SYMBOL.  |
 110 `-----------------------------------------------------------------------*/
 111
 112 void
 113 symbol_list_syms_print (const symbol_list *l, FILE *f)
 114 {
 115   for (/* Nothing. */; l && l->content.sym; l = l->next)
 116     {
 117       symbol_print (l->content.sym, f);
 118       fprintf (stderr, l->action_props.is_value_used ? " used" : " unused");
 119       if (l && l->content.sym)
 120         fprintf (f, ", ");
 121     }
 122 }
 123
 124
 125 /*---------------------------.
 126 | Prepend NODE to the LIST.  |
 127 `---------------------------*/
 128
 129 symbol_list *
 130 symbol_list_prepend (symbol_list *list, symbol_list *node)
 131 {
 132   node->next = list;
 133   return node;
 134 }
 135
 136
 137 /*-----------------------------------------------.
 138 | Free the LIST, but not the items it contains.  |
 139 `-----------------------------------------------*/
 140
 141 void
 142 symbol_list_free (symbol_list *list)
 143 {
 144   LIST_FREE (symbol_list, list);
 145 }
 146
 147
 148 /*--------------------.
 149 | Return its length.  |
 150 `--------------------*/
 151
 152 int
 153 symbol_list_length (symbol_list const *l)
 154 {
 155   int res = 0;
 156   for (/* Nothing. */;
 157        l && !(l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL);
 158        l = l->next)
 159     ++res;
 160   return res;
 161 }
 162
 163
 164 /*------------------------------.
 165 | Get item N in symbol list L.  |
 166 `------------------------------*/
 167
 168 symbol_list *
 169 symbol_list_n_get (symbol_list *l, int n)
 170 {
 171   int i;
 172
 173   if (n < 0)
 174     return NULL;
 175
 176   for (i = 0; i < n; ++i)
 177     {
 178       l = l->next;
 179       if (l == NULL
 180           || (l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL))
 181         return NULL;
 182     }
 183
 184   return l;
 185 }
 186
 187
 188 /*--------------------------------------------------------------.
 189 | Get the data type (alternative in the union) of the value for |
 190 | symbol N in symbol list L.                                    |
 191 `--------------------------------------------------------------*/
 192
 193 uniqstr
 194 symbol_list_n_type_name_get (symbol_list *l, location loc, int n)
 195 {
 196   l = symbol_list_n_get (l, n);
 197   if (!l)
 198     {
 199       complain_at (loc, _("invalid $ value: $%d"), n);
 200       return NULL;
 201     }
 202   aver (l->content_type == SYMLIST_SYMBOL);
 203   return l->content.sym->type_name;
 204 }
 205
 206
 207 void
 208 symbol_list_destructor_set (symbol_list *node, char const *code, location loc)
 209 {
 210   code_props destructor;
 211   code_props_symbol_action_init (&destructor, code, loc);
 212   code_props_translate_code (&destructor);
 213   switch (node->content_type)
 214     {
 215       case SYMLIST_SYMBOL:
 216         symbol_destructor_set (node->content.sym, &destructor);
 217         break;
 218       case SYMLIST_TYPE:
 219         semantic_type_destructor_set (
 220           semantic_type_get (node->content.type_name), &destructor);
 221         break;
 222       case SYMLIST_DEFAULT_TAGGED:
 223         default_tagged_destructor_set (&destructor);
 224         break;
 225       case SYMLIST_DEFAULT_TAGLESS:
 226         default_tagless_destructor_set (&destructor);
 227         break;
 228     }
 229 }
 230
 231 void
 232 symbol_list_printer_set (symbol_list *node, char const *code, location loc)
 233 {
 234   code_props printer;
 235   code_props_symbol_action_init (&printer, code, loc);
 236   code_props_translate_code (&printer);
 237   switch (node->content_type)
 238     {
 239       case SYMLIST_SYMBOL:
 240         symbol_printer_set (node->content.sym, &printer);
 241         break;
 242       case SYMLIST_TYPE:
 243         semantic_type_printer_set (
 244           semantic_type_get (node->content.type_name), &printer);
 245         break;
 246       case SYMLIST_DEFAULT_TAGGED:
 247         default_tagged_printer_set (&printer);
 248         break;
 249       case SYMLIST_DEFAULT_TAGLESS:
 250         default_tagless_printer_set (&printer);
 251         break;
 252     }
 253 }