Enable declaration of default %printer/%destructor. Make the parser

[bison.git] / src / gram.c

diff --git a/src/gram.c b/src/gram.c
index 39045d76f800a47a857ffd38110f95a9f3f6c712..28666b0c8cf4521770adabf08869257ea18c5fb4 100644 (file)
--- a/src/gram.c
+++ b/src/gram.c
@@ -1,6 +1,7 @@
 /* Allocate input grammar variables for Bison.
 
-   Copyright (C) 1984, 1986, 1989, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 2001, 2002, 2003, 2005, 2006 Free
+   Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -16,10 +17,10 @@
 
    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.  */
-
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
+#include <config.h>
 #include "system.h"
 
 #include <quotearg.h>
@@ -46,10 +47,6 @@ symbol_number *token_translations = NULL;
 
 int max_user_token_number = 256;
 
-int glr_parser = 0;
-int pure_parser = 0;
-
-
 /*--------------------------------------------------------------.
 | Return true IFF the rule has a `number' smaller than NRULES.  |
 `--------------------------------------------------------------*/
@@ -68,7 +65,7 @@ rule_useful_p (rule *r)
 bool
 rule_useless_p (rule *r)
 {
-  return r->number >= nrules;
+  return !rule_useful_p (r);
 }
 
 
@@ -80,7 +77,7 @@ rule_useless_p (rule *r)
 bool
 rule_never_reduced_p (rule *r)
 {
-  return !r->useful && r->number < nrules;
+  return !r->useful && rule_useful_p (r);
 }
 
 
@@ -203,7 +200,7 @@ void
 grammar_rules_partial_print (FILE *out, const char *title,
                             rule_filter filter)
 {
-  int r;
+  rule_number r;
   bool first = true;
   symbol *previous_lhs = NULL;
 
@@ -270,11 +267,11 @@ grammar_dump (FILE *out, const char *title)
     for (i = 0; i < nrules + nuseless_productions; i++)
       {
        rule *rule_i = &rules[i];
-       item_number *r = NULL;
+       item_number *rp = NULL;
        unsigned int rhs_itemno = rule_i->rhs - ritem;
-       unsigned int rhs_count = 0;
+       unsigned int rhs_count = 0;
        /* Find the last RHS index in ritems. */
-       for (r = rule_i->rhs; *r >= 0; ++r)
+       for (rp = rule_i->rhs; *rp >= 0; ++rp)
          ++rhs_count;
        fprintf (out, "%3d (%2d, %2d, %2d, %2u-%2u)   %2d ->",
                 i,
@@ -285,9 +282,9 @@ grammar_dump (FILE *out, const char *title)
                 rhs_itemno + rhs_count - 1,
                 rule_i->lhs->number);
        /* Dumped the RHS. */
-       for (r = rule_i->rhs; *r >= 0; r++)
-         fprintf (out, " %3d", *r);
-       fprintf (out, "  [%d]\n", item_number_as_rule_number (*r));
+       for (rp = rule_i->rhs; *rp >= 0; rp++)
+         fprintf (out, " %3d", *rp);
+       fprintf (out, "  [%d]\n", item_number_as_rule_number (*rp));
       }
   }
   fprintf (out, "\n\n");
@@ -320,8 +317,7 @@ grammar_rules_never_reduced_report (const char *message)
     if (!rules[r].useful)
       {
        location_print (stderr, rules[r].location);
-       fprintf (stderr, ": %s: %s: ",
-                _("warning"), message);
+       fprintf (stderr, ": %s: %s: ", _("warning"), message);
        rule_print (&rules[r], stderr);
       }
 }
@@ -329,7 +325,8 @@ grammar_rules_never_reduced_report (const char *message)
 void
 grammar_free (void)
 {
-  free (ritem);
+  if (ritem)
+    free (ritem - 1);
   free (rules);
   free (token_translations);
   /* Free the symbol table data structure.  */