/* Grammar reduction for Bison.
- Copyright (C) 1988, 1989, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1988, 1989, 2000, 2001, 2002, 2003, 2005, 2006 Free
+ Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
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. */
/* Reduce the grammar: Find and eliminate unreachable terminals,
/* Don't eliminate unreachable terminals: They may be used by the
user's parser. */
+#include <config.h>
#include "system.h"
#include <bitset.h>
{
int useful = 0;
int useless = nrules - nuseless_productions;
- rule *rules_sorted = MALLOC (rules_sorted, nrules);
+ rule *rules_sorted = xnmalloc (nrules, sizeof *rules_sorted);
rule_number r;
for (r = 0; r < nrules; ++r)
rules_sorted[rules[r].useful ? useful++ : useless++] = rules[r];
/* Adjust NRITEMS. */
{
- int r;
+ rule_number r;
int length;
for (r = nrules; r < nrules + nuseless_productions; ++r)
{
/* Map the nonterminals to their new index: useful first, useless
afterwards. Kept for later report. */
- symbol_number *nontermmap = CALLOC (nontermmap, nvars);
+ symbol_number *nontermmap = xnmalloc (nvars, sizeof *nontermmap);
n = ntokens;
for (i = ntokens; i < nsyms; i++)
if (bitset_test (V, i))
/* Shuffle elements of tables indexed by symbol number. */
{
- symbol **symbols_sorted = MALLOC (symbols_sorted, nvars);
+ symbol **symbols_sorted = xnmalloc (nvars, sizeof *symbols_sorted);
for (i = ntokens; i < nsyms; i++)
symbols[i]->number = nontermmap[i - ntokens];
nuseless_productions),
nuseless_productions);
fprintf (stderr, "\n");
- fflush (stderr);
}
\f
void
useless_nonterminals ();
inaccessable_symbols ();
- reduced = (bool) (nuseless_nonterminals + nuseless_productions > 0);
+ reduced = (nuseless_nonterminals + nuseless_productions > 0);
if (!reduced)
return;