/* Bitset vectors.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
/* Create a vector of N_VECS bitsets, each of N_BITS, and of
type TYPE. */
bitset *
-bitsetv_alloc (n_vecs, n_bits, type)
- unsigned int n_vecs;
- unsigned int n_bits;
- enum bitset_type type;
+bitsetv_alloc (bitset_bindex n_vecs, bitset_bindex n_bits,
+ enum bitset_type type)
{
- unsigned int vector_bytes;
- unsigned int bytes;
- bitset *bsetv;
- unsigned int i;
+ size_t vector_bytes;
+ size_t bytes;
+ bitset *bsetv;
+ bitset_bindex i;
- /* Determine number of bytes for each set. */
- bytes = bitset_bytes (type, n_bits);
+ /* Determine number of bytes for each set. */
+ bytes = bitset_bytes (type, n_bits);
- /* Allocate vector table at head of bitset array. */
- vector_bytes = n_vecs * sizeof (bitset);
- bsetv = (bitset *) xmalloc (vector_bytes + bytes * n_vecs);
+ /* If size calculation overflows, memory is exhausted. */
+ if (BITSET_SIZE_MAX / (sizeof (bitset) + bytes) <= n_vecs)
+ xalloc_die ();
- for (i = 0; i < n_vecs; i++)
+ /* Allocate vector table at head of bitset array. */
+ vector_bytes = (n_vecs + 1) * sizeof (bitset) + bytes - 1;
+ vector_bytes -= vector_bytes % bytes;
+ bsetv = (bitset *) xcalloc (1, vector_bytes + bytes * n_vecs);
+
+ for (i = 0; i < n_vecs; i++)
{
- bsetv[i] = (bitset)((char *)bsetv + vector_bytes + i * bytes);
+ bsetv[i] = (bitset) (void *) ((char *) bsetv + vector_bytes + i * bytes);
bitset_init (bsetv[i], n_bits, type);
}
- return bsetv;
+
+ /* Null terminate table. */
+ bsetv[i] = 0;
+ return bsetv;
}
/* Create a vector of N_VECS bitsets, each of N_BITS, and with
attribute hints specified by ATTR. */
bitset *
-bitsetv_create (n_vecs, n_bits, attr)
- unsigned int n_vecs;
- unsigned int n_bits;
- unsigned int attr;
+bitsetv_create (bitset_bindex n_vecs, bitset_bindex n_bits, unsigned int attr)
{
- enum bitset_type type;
+ enum bitset_type type;
- type = bitset_type_choose (n_bits, attr);
- return bitsetv_alloc (n_vecs, n_bits, type);
+ type = bitset_type_choose (n_bits, attr);
+ return bitsetv_alloc (n_vecs, n_bits, type);
}
/* Free bitset vector BSETV. */
void
-bitsetv_free (bsetv)
- bitset *bsetv;
+bitsetv_free (bitsetv bsetv)
{
- free (bsetv);
+ bitset_bindex i;
+
+ for (i = 0; bsetv[i]; i++)
+ BITSET_FREE_ (bsetv[i]);
+ free (bsetv);
}
-/* Zero a vector of N_VECS bitsets. */
+/* Zero a vector of bitsets. */
void
-bitsetv_zero (bsetv, n_vecs)
- struct bitset_struct **bsetv;
- unsigned int n_vecs;
+bitsetv_zero (bitsetv bsetv)
{
- unsigned int i;
+ bitset_bindex i;
- for (i = 0; i < n_vecs; i++)
- bitset_zero (bsetv[i]);
+ for (i = 0; bsetv[i]; i++)
+ bitset_zero (bsetv[i]);
}
-/* Set a vector of N_VECS bitsets to ones. */
+/* Set a vector of bitsets to ones. */
void
-bitsetv_ones (bsetv, n_vecs)
- bitset *bsetv;
- unsigned int n_vecs;
+bitsetv_ones (bitsetv bsetv)
{
- unsigned int i;
+ bitset_bindex i;
- for (i = 0; i < n_vecs; i++)
+ for (i = 0; bsetv[i]; i++)
bitset_ones (bsetv[i]);
}
+/* Given a vector BSETV of N bitsets of size N, modify its contents to
+ be the transitive closure of what was given. */
+void
+bitsetv_transitive_closure (bitsetv bsetv)
+{
+ bitset_bindex i;
+ bitset_bindex j;
+
+ for (i = 0; bsetv[i]; i++)
+ for (j = 0; bsetv[j]; j++)
+ if (bitset_test (bsetv[j], i))
+ bitset_or (bsetv[j], bsetv[j], bsetv[i]);
+}
+
+
+/* Given a vector BSETV of N bitsets of size N, modify its contents to
+ be the reflexive transitive closure of what was given. This is
+ the same as transitive closure but with all bits on the diagonal
+ of the bit matrix set. */
+void
+bitsetv_reflexive_transitive_closure (bitsetv bsetv)
+{
+ bitset_bindex i;
+
+ bitsetv_transitive_closure (bsetv);
+ for (i = 0; bsetv[i]; i++)
+ bitset_set (bsetv[i], i);
+}
+
+
/* Dump the contents of a bitset vector BSETV with N_VECS elements to
FILE. */
void
-bitsetv_dump (file, title, subtitle, bsetv, n_vecs)
- FILE *file;
- const char *title, *subtitle;
- bitset *bsetv;
- unsigned int n_vecs;
+bitsetv_dump (FILE *file, char const *title, char const *subtitle,
+ bitsetv bsetv)
{
- unsigned int i;
+ bitset_windex i;
fprintf (file, "%s\n", title);
- for (i = 0; i < n_vecs; i++)
+ for (i = 0; bsetv[i]; i++)
{
- fprintf (file, "%s %d\n", subtitle, i);
+ fprintf (file, "%s %lu\n", subtitle, (unsigned long int) i);
bitset_dump (file, bsetv[i]);
}
fprintf (file, "\n");
}
+
+
+void
+debug_bitsetv (bitsetv bsetv)
+{
+ bitset_windex i;
+
+ for (i = 0; bsetv[i]; i++)
+ {
+ fprintf (stderr, "%lu: ", (unsigned long int) i);
+ debug_bitset (bsetv[i]);
+ }
+
+ fprintf (stderr, "\n");
+}
projects / bison.git / blobdiff