Fix push parsing memory leak reported by Brandon Lucia at

[bison.git] / src / relation.c

diff --git a/src/relation.c b/src/relation.c
index 441b0076e8d4ea6cdfceb6951a38fe8dff416976..1d2b42dd9f34efb802e8617b9905f9c3d8327195 100644 (file)
--- a/src/relation.c
+++ b/src/relation.c
@@ -1,5 +1,5 @@
 /* Binary relations.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -18,6 +18,7 @@
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.  */
 
+#include <config.h>
 #include "system.h"
 
 #include <bitsetv.h>
@@ -123,6 +124,7 @@ relation_digraph (relation r, relation_node size, bitsetv *function)
 void
 relation_transpose (relation *R_arg, relation_node n)
 {
+  relation r = *R_arg;
   /* The result. */
   relation new_R = xnmalloc (n, sizeof *new_R);
   /* END_R[I] -- next entry of NEW_R[I]. */
@@ -135,14 +137,14 @@ relation_transpose (relation *R_arg, relation_node n)
   if (trace_flag & trace_sets)
     {
       fputs ("relation_transpose: input\n", stderr);
-      relation_print (*R_arg, n, stderr);
+      relation_print (r, n, stderr);
     }
 
   /* Count. */
   for (i = 0; i < n; i++)
-    if ((*R_arg)[i])
-      for (j = 0; (*R_arg)[i][j] != END_NODE; ++j)
-       ++nedges[(*R_arg)[i][j]];
+    if (r[i])
+      for (j = 0; r[i][j] != END_NODE; ++j)
+       ++nedges[r[i][j]];
 
   /* Allocate. */
   for (i = 0; i < n; i++)
@@ -159,20 +161,17 @@ relation_transpose (relation *R_arg, relation_node n)
 
   /* Store. */
   for (i = 0; i < n; i++)
-    if ((*R_arg)[i])
-      for (j = 0; (*R_arg)[i][j] != END_NODE; ++j)
-       {
-         *end_R[(*R_arg)[i][j]] = i;
-         ++end_R[(*R_arg)[i][j]];
-       }
+    if (r[i])
+      for (j = 0; r[i][j] != END_NODE; ++j)
+       *end_R[r[i][j]]++ = i;
 
   free (nedges);
   free (end_R);
 
   /* Free the input: it is replaced with the result. */
   for (i = 0; i < n; i++)
-    free ((*R_arg)[i]);
-  free (*R_arg);
+    free (r[i]);
+  free (r);
 
   if (trace_flag & trace_sets)
     {