When reducing initial empty rules, Bison parser read an initial

[bison.git] / lib / bitsetv.c

diff --git a/lib/bitsetv.c b/lib/bitsetv.c
index b6eb77e84b909775ea0fdbaf4c8afa5e2c416074..c9aea246ea582e9aa9cb725ff6191fa3ca77bf57 100644 (file)
--- a/lib/bitsetv.c
+++ b/lib/bitsetv.c
@@ -1,5 +1,5 @@
 /* Bitset vectors.
-   Copyright (C) 2001 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -29,30 +29,33 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 /* 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;
+  size_t vector_bytes;
+  size_t bytes;
   bitset *bsetv;
-  unsigned int i;
-  
+  bitset_bindex i;
+
   /* Determine number of bytes for each set.  */
   bytes = bitset_bytes (type, n_bits);
-  
+
+  /* If size calculation overflows, memory is exhausted.  */
+  if (BITSET_SIZE_MAX / (sizeof (bitset) + bytes) <= n_vecs)
+    xalloc_die ();
+
   /* Allocate vector table at head of bitset array.  */
-  vector_bytes = (n_vecs + 1) * sizeof (bitset);
+  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);
     }
-  
+
   /* Null terminate table.  */
   bsetv[i] = 0;
   return bsetv;
@@ -62,13 +65,10 @@ bitsetv_alloc (n_vecs, n_bits, type)
 /* 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;
-  
+
   type = bitset_type_choose (n_bits, attr);
   return bitsetv_alloc (n_vecs, n_bits, type);
 }
@@ -76,10 +76,9 @@ bitsetv_create (n_vecs, n_bits, attr)
 
 /* Free bitset vector BSETV.  */
 void
-bitsetv_free (bsetv)
-     bitset *bsetv;
+bitsetv_free (bitsetv bsetv)
 {
-  unsigned int i;
+  bitset_bindex i;
 
   for (i = 0; bsetv[i]; i++)
       BITSET_FREE_ (bsetv[i]);
@@ -89,11 +88,10 @@ bitsetv_free (bsetv)
 
 /* Zero a vector of bitsets.  */
 void
-bitsetv_zero (bsetv)
-     struct bitset_struct **bsetv;
+bitsetv_zero (bitsetv bsetv)
 {
-  unsigned int i;
-  
+  bitset_bindex i;
+
   for (i = 0; bsetv[i]; i++)
     bitset_zero (bsetv[i]);
 }
@@ -101,48 +99,74 @@ bitsetv_zero (bsetv)
 
 /* Set a vector of bitsets to ones.  */
 void
-bitsetv_ones (bsetv)
-     bitset *bsetv;
+bitsetv_ones (bitsetv bsetv)
 {
-  unsigned int i;
-  
+  bitset_bindex 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)
-     FILE *file;
-     const char *title, *subtitle;
-     bitset *bsetv;
+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; bsetv[i]; i++)
     {
-      fprintf (file, "%s %d\n", subtitle, i);
+      fprintf (file, "%s %lu\n", subtitle, (unsigned long) i);
       bitset_dump (file, bsetv[i]);
     }
-  
+
   fprintf (file, "\n");
 }
 
 
 void
-debug_bitsetv (bsetv)
-     bitset *bsetv;
+debug_bitsetv (bitsetv bsetv)
 {
-  unsigned int i;
-  
+  bitset_windex i;
+
   for (i = 0; bsetv[i]; i++)
     {
-      fprintf (stderr, "%d: ", i);
+      fprintf (stderr, "%lu: ", (unsigned long) i);
       debug_bitset (bsetv[i]);
     }
-  
+
   fprintf (stderr, "\n");
 }