portability: fix spawning on at least FreeBSD 8 and FreeBSD 9.

[bison.git] / src / symlist.c

diff --git a/src/symlist.c b/src/symlist.c
index 4ae5f0171d489abb275cecfa04cae1dee4ac2a2e..8546c96bc36737ccb096170d09a0eb5bc3196dec 100644 (file)
--- a/src/symlist.c
+++ b/src/symlist.c
@@ -1,99 +1,272 @@
 /* Lists of symbols for Bison
 /* Lists of symbols for Bison

-   Copyright (C) 2002  Free Software Foundation, Inc.
+
+   Copyright (C) 2002, 2005-2007, 2009-2010 Free Software Foundation,
+   Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 

-   Bison is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.

 
 

-   Bison is distributed in the hope that it will be useful,
+   This program 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
    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 Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 

+#include <config.h>

 #include "system.h"
 #include "system.h"

+
+#include "complain.h"

 #include "symlist.h"
 
 
 #include "symlist.h"
 
 

-/*----------------------------------------------.
-| Create a list containing SYMBOL at LOCATION.  |
-`----------------------------------------------*/
+/*--------------------------------------.
+| Create a list containing SYM at LOC.  |
+`--------------------------------------*/

 
 

-symbol_list_t *
-symbol_list_new (symbol_t *sym, location_t location)
+symbol_list *
+symbol_list_sym_new (symbol *sym, location loc)

 {
 {

-  symbol_list_t *res = XMALLOC (symbol_list_t, 1);
-  res->next = NULL;
-  res->sym = sym;
-  res->location = location;
-  res->action = NULL;
+  symbol_list *res = xmalloc (sizeof *res);
+
+  res->content_type = SYMLIST_SYMBOL;
+  res->content.sym = sym;
+  res->location = res->sym_loc = loc;
+
+  res->midrule = NULL;
+  res->midrule_parent_rule = NULL;
+  res->midrule_parent_rhs_index = 0;
+
+  code_props_none_init (&res->action_props);
+

   res->ruleprec = NULL;
   res->ruleprec = NULL;

+  res->dprec = 0;
+  res->merger = 0;
+
+  res->named_ref = NULL;
+
+  res->next = NULL;
+

   return res;
 }
 
 
   return res;
 }
 
 

-/*-----------------------------------------.
-| Prepend SYMBOL at LOCATION to the LIST.  |
-`-----------------------------------------*/
+/*--------------------------------------------.
+| Create a list containing TYPE_NAME at LOC.  |
+`--------------------------------------------*/

 
 

-symbol_list_t *
-symbol_list_prepend (symbol_list_t *list,
-                    symbol_t *symbol, location_t location)
+symbol_list *
+symbol_list_type_new (uniqstr type_name, location loc)

 {
 {

-  symbol_list_t *res = symbol_list_new (symbol, location);
-  res->next = list;
+  symbol_list *res = xmalloc (sizeof *res);
+
+  res->content_type = SYMLIST_TYPE;
+  res->content.type_name = type_name;
+  res->location = res->sym_loc = loc;
+  res->named_ref = NULL;
+  res->next = NULL;
+

   return res;
 }
 
 
   return res;
 }
 
 

-/*-------------------------------------------------.
-| Free the LIST, but not the symbols it contains.  |
-`-------------------------------------------------*/
+/*----------------------------------------.
+| Create a list containing a <*> at LOC.  |
+`----------------------------------------*/
+
+symbol_list *
+symbol_list_default_tagged_new (location loc)
+{
+  symbol_list *res = xmalloc (sizeof *res);
+
+  res->content_type = SYMLIST_DEFAULT_TAGGED;
+  res->location = res->sym_loc = loc;
+  res->named_ref = NULL;
+  res->next = NULL;
+
+  return res;
+}
+
+
+/*---------------------------------------.
+| Create a list containing a <> at LOC.  |
+`---------------------------------------*/
+
+symbol_list *
+symbol_list_default_tagless_new (location loc)
+{
+  symbol_list *res = xmalloc (sizeof *res);
+
+  res->content_type = SYMLIST_DEFAULT_TAGLESS;
+  res->location = res->sym_loc = loc;
+  res->named_ref = NULL;
+  res->next = NULL;
+
+  return res;
+}
+
+
+/*-----------------------------------------------------------------------.
+| Print this list, for which every content_type must be SYMLIST_SYMBOL.  |
+`-----------------------------------------------------------------------*/

 
 void
 
 void

-symbol_list_free (symbol_list_t *list)
+symbol_list_syms_print (const symbol_list *l, FILE *f)

 {
 {

-  LIST_FREE (symbol_list_t, list);
+  for (/* Nothing. */; l && l->content.sym; l = l->next)
+    {
+      symbol_print (l->content.sym, f);
+      fprintf (stderr, l->action_props.is_value_used ? " used" : " unused");
+      if (l && l->content.sym)
+       fprintf (f, ", ");
+    }

 }
 
 
 }
 
 

-/*--------------------------------------------------------------.
-| Get the data type (alternative in the union) of the value for |
-| symbol N in rule RULE.                                        |
-`--------------------------------------------------------------*/
+/*---------------------------.
+| Prepend NODE to the LIST.  |
+`---------------------------*/
+
+symbol_list *
+symbol_list_prepend (symbol_list *list, symbol_list *node)
+{
+  node->next = list;
+  return node;
+}
+
+
+/*-----------------------------------------------.
+| Free the LIST, but not the items it contains.  |
+`-----------------------------------------------*/
+
+void
+symbol_list_free (symbol_list *list)
+{
+  symbol_list *node, *next;
+  for (node = list; node; node = next)
+    {
+      next = node->next;
+      if (node->named_ref)
+        named_ref_free (node->named_ref);
+      free (node);
+    }
+}
+

 
 

-char *
-symbol_list_n_type_name_get (symbol_list_t *rule, location_t location, int n)
+/*--------------------.
+| Return its length.  |
+`--------------------*/
+
+int
+symbol_list_length (symbol_list const *l)
+{
+  int res = 0;
+  for (/* Nothing. */;
+       l && !(l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL);
+       l = l->next)
+    ++res;
+  return res;
+}
+
+
+/*------------------------------.
+| Get item N in symbol list L.  |
+`------------------------------*/
+
+symbol_list *
+symbol_list_n_get (symbol_list *l, int n)

 {
   int i;
 {
   int i;

-  symbol_list_t *rp;

 
   if (n < 0)
 
   if (n < 0)

+    return NULL;
+
+  for (i = 0; i < n; ++i)

     {
     {

-      complain_at (location, _("invalid $ value"));
+      l = l->next;
+      if (l == NULL
+          || (l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL))
+       return NULL;
+    }
+
+  return l;
+}
+
+
+/*--------------------------------------------------------------.
+| Get the data type (alternative in the union) of the value for |
+| symbol N in symbol list L.                                    |
+`--------------------------------------------------------------*/
+
+uniqstr
+symbol_list_n_type_name_get (symbol_list *l, location loc, int n)
+{
+  l = symbol_list_n_get (l, n);
+  if (!l)
+    {
+      complain_at (loc, _("invalid $ value: $%d"), n);

       return NULL;
     }
       return NULL;
     }

+  aver (l->content_type == SYMLIST_SYMBOL);
+  return l->content.sym->type_name;
+}

 
 

-  rp = rule;
-  i = 0;
+bool
+symbol_list_null (symbol_list *node)
+{
+  return !node ||
+    (node->content_type == SYMLIST_SYMBOL && !(node->content.sym));
+}

 
 

-  while (i < n)
+void
+symbol_list_destructor_set (symbol_list *node, char const *code, location loc)
+{
+  code_props destructor;
+  code_props_symbol_action_init (&destructor, code, loc);
+  code_props_translate_code (&destructor);
+  switch (node->content_type)

     {
     {

-      rp = rp->next;
-      if (rp == NULL || rp->sym == NULL)
-       {
-         complain_at (location, _("invalid $ value"));
-         return NULL;
-       }
-      ++i;
+      case SYMLIST_SYMBOL:
+        symbol_destructor_set (node->content.sym, &destructor);
+        break;
+      case SYMLIST_TYPE:
+        semantic_type_destructor_set (
+          semantic_type_get (node->content.type_name), &destructor);
+        break;
+      case SYMLIST_DEFAULT_TAGGED:
+        default_tagged_destructor_set (&destructor);
+        break;
+      case SYMLIST_DEFAULT_TAGLESS:
+        default_tagless_destructor_set (&destructor);
+        break;

     }
     }

+}

 
 

-  return rp->sym->type_name;
+void
+symbol_list_printer_set (symbol_list *node, char const *code, location loc)
+{
+  code_props printer;
+  code_props_symbol_action_init (&printer, code, loc);
+  code_props_translate_code (&printer);
+  switch (node->content_type)
+    {
+      case SYMLIST_SYMBOL:
+        symbol_printer_set (node->content.sym, &printer);
+        break;
+      case SYMLIST_TYPE:
+        semantic_type_printer_set (
+          semantic_type_get (node->content.type_name), &printer);
+        break;
+      case SYMLIST_DEFAULT_TAGGED:
+        default_tagged_printer_set (&printer);
+        break;
+      case SYMLIST_DEFAULT_TAGLESS:
+        default_tagless_printer_set (&printer);
+        break;
+    }

 }
 }