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    Bison 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 2, or (at your option)
  10    any later version.
  11
  12    Bison 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 Bison; see the file COPYING.  If not, write to
  19    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include <config.h>
  23 #include "system.h"
  24
  25 #include "complain.h"
  26 #include "symlist.h"
  27
  28
  29 /*--------------------------------------.
  30 | Create a list containing SYM at LOC.  |
  31 `--------------------------------------*/
  32
  33 symbol_list *
  34 symbol_list_sym_new (symbol *sym, location loc)
  35 {
  36   symbol_list *res = xmalloc (sizeof *res);
  37
  38   res->content_type = SYMLIST_SYMBOL;
  39   res->content.sym = sym;
  40   res->location = loc;
  41
  42   res->midrule = NULL;
  43   res->midrule_parent_rule = NULL;
  44   res->midrule_parent_rhs_index = 0;
  45
  46   code_props_none_init (&res->action_props);
  47
  48   res->ruleprec = NULL;
  49   res->dprec = 0;
  50   res->merger = 0;
  51
  52   res->next = NULL;
  53
  54   return res;
  55 }
  56
  57
  58 /*--------------------------------------------.
  59 | Create a list containing TYPE_NAME at LOC.  |
  60 `--------------------------------------------*/
  61
  62 symbol_list *
  63 symbol_list_type_new (uniqstr type_name, location loc)
  64 {
  65   symbol_list *res = xmalloc (sizeof *res);
  66
  67   res->content_type = SYMLIST_TYPE;
  68   res->content.type_name = type_name;
  69   res->location = loc;
  70   res->next = NULL;
  71
  72   return res;
  73 }
  74
  75
  76 /*----------------------------------------.
  77 | Create a list containing a <*> at LOC.  |
  78 `----------------------------------------*/
  79
  80 symbol_list *
  81 symbol_list_default_tagged_new (location loc)
  82 {
  83   symbol_list *res = xmalloc (sizeof *res);
  84
  85   res->content_type = SYMLIST_DEFAULT_TAGGED;
  86   res->location = loc;
  87   res->next = NULL;
  88
  89   return res;
  90 }
  91
  92
  93 /*---------------------------------------.
  94 | Create a list containing a <> at LOC.  |
  95 `---------------------------------------*/
  96
  97 symbol_list *
  98 symbol_list_default_tagless_new (location loc)
  99 {
 100   symbol_list *res = xmalloc (sizeof *res);
 101
 102   res->content_type = SYMLIST_DEFAULT_TAGLESS;
 103   res->location = loc;
 104   res->next = NULL;
 105
 106   return res;
 107 }
 108
 109
 110 /*-----------------------------------------------------------------------.
 111 | Print this list, for which every content_type must be SYMLIST_SYMBOL.  |
 112 `-----------------------------------------------------------------------*/
 113
 114 void
 115 symbol_list_syms_print (const symbol_list *l, FILE *f)
 116 {
 117   for (/* Nothing. */; l && l->content.sym; l = l->next)
 118     {
 119       symbol_print (l->content.sym, f);
 120       fprintf (stderr, l->action_props.is_value_used ? " used" : " unused");
 121       if (l && l->content.sym)
 122         fprintf (f, ", ");
 123     }
 124 }
 125
 126
 127 /*---------------------------.
 128 | Prepend NODE to the LIST.  |
 129 `---------------------------*/
 130
 131 symbol_list *
 132 symbol_list_prepend (symbol_list *list, symbol_list *node)
 133 {
 134   node->next = list;
 135   return node;
 136 }
 137
 138
 139 /*-----------------------------------------------.
 140 | Free the LIST, but not the items it contains.  |
 141 `-----------------------------------------------*/
 142
 143 void
 144 symbol_list_free (symbol_list *list)
 145 {
 146   LIST_FREE (symbol_list, list);
 147 }
 148
 149
 150 /*--------------------.
 151 | Return its length.  |
 152 `--------------------*/
 153
 154 int
 155 symbol_list_length (symbol_list const *l)
 156 {
 157   int res = 0;
 158   for (/* Nothing. */;
 159        l && !(l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL);
 160        l = l->next)
 161     ++res;
 162   return res;
 163 }
 164
 165
 166 /*------------------------------.
 167 | Get item N in symbol list L.  |
 168 `------------------------------*/
 169
 170 symbol_list *
 171 symbol_list_n_get (symbol_list *l, int n)
 172 {
 173   int i;
 174
 175   if (n < 0)
 176     return NULL;
 177
 178   for (i = 0; i < n; ++i)
 179     {
 180       l = l->next;
 181       if (l == NULL
 182           || (l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL))
 183         return NULL;
 184     }
 185
 186   return l;
 187 }
 188
 189
 190 /*--------------------------------------------------------------.
 191 | Get the data type (alternative in the union) of the value for |
 192 | symbol N in symbol list L.                                    |
 193 `--------------------------------------------------------------*/
 194
 195 uniqstr
 196 symbol_list_n_type_name_get (symbol_list *l, location loc, int n)
 197 {
 198   l = symbol_list_n_get (l, n);
 199   if (!l)
 200     {
 201       complain_at (loc, _("invalid $ value: $%d"), n);
 202       return NULL;
 203     }
 204   aver (l->content_type == SYMLIST_SYMBOL);
 205   return l->content.sym->type_name;
 206 }
 207
 208
 209 void
 210 symbol_list_destructor_set (symbol_list *node, char const *code, location loc)
 211 {
 212   code_props destructor;
 213   code_props_symbol_action_init (&destructor, code, loc);
 214   code_props_translate_code (&destructor);
 215   switch (node->content_type)
 216     {
 217       case SYMLIST_SYMBOL:
 218         symbol_destructor_set (node->content.sym, &destructor);
 219         break;
 220       case SYMLIST_TYPE:
 221         semantic_type_destructor_set (
 222           semantic_type_get (node->content.type_name), &destructor);
 223         break;
 224       case SYMLIST_DEFAULT_TAGGED:
 225         default_tagged_destructor_set (&destructor);
 226         break;
 227       case SYMLIST_DEFAULT_TAGLESS:
 228         default_tagless_destructor_set (&destructor);
 229         break;
 230     }
 231 }
 232
 233 void
 234 symbol_list_printer_set (symbol_list *node, char const *code, location loc)
 235 {
 236   code_props printer;
 237   code_props_symbol_action_init (&printer, code, loc);
 238   code_props_translate_code (&printer);
 239   switch (node->content_type)
 240     {
 241       case SYMLIST_SYMBOL:
 242         symbol_printer_set (node->content.sym, &printer);
 243         break;
 244       case SYMLIST_TYPE:
 245         semantic_type_printer_set (
 246           semantic_type_get (node->content.type_name), &printer);
 247         break;
 248       case SYMLIST_DEFAULT_TAGGED:
 249         default_tagged_printer_set (&printer);
 250         break;
 251       case SYMLIST_DEFAULT_TAGLESS:
 252         default_tagless_printer_set (&printer);
 253         break;
 254     }
 255 }