X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d08290769c798befc27e9f8bbc3f1a3da12d1f08..f6df83b4e80b2a53c08b5dc654e247076a3b9b03:/lib/bitset.c
diff --git a/lib/bitset.c b/lib/bitset.c
index a500d471..d8b5f092 100644
--- a/lib/bitset.c
+++ b/lib/bitset.c
@@ -1,10 +1,12 @@
/* General bitsets.
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.
+
Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -13,18 +15,18 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include
-#include
#include "bitset.h"
+
+#include
+#include
#include "abitset.h"
#include "lbitset.h"
#include "ebitset.h"
+#include "vbitset.h"
#include "bitset_stats.h"
#include "obstack.h"
@@ -43,6 +45,9 @@ bitset_bytes (enum bitset_type type, bitset_bindex n_bits)
switch (type)
{
+ default:
+ abort ();
+
case BITSET_ARRAY:
bytes = abitset_bytes (n_bits);
break;
@@ -55,8 +60,9 @@ bitset_bytes (enum bitset_type type, bitset_bindex n_bits)
bytes = ebitset_bytes (n_bits);
break;
- default:
- abort ();
+ case BITSET_VARRAY:
+ bytes = vbitset_bytes (n_bits);
+ break;
}
return bytes;
@@ -72,6 +78,9 @@ bitset_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
switch (type)
{
+ default:
+ abort ();
+
case BITSET_ARRAY:
return abitset_init (bset, n_bits);
@@ -81,8 +90,8 @@ bitset_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
case BITSET_TABLE:
return ebitset_init (bset, n_bits);
- default:
- abort ();
+ case BITSET_VARRAY:
+ return vbitset_init (bset, n_bits);
}
}
@@ -93,27 +102,30 @@ bitset_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
enum bitset_type
bitset_type_choose (bitset_bindex n_bits ATTRIBUTE_UNUSED, unsigned int attr)
{
- enum bitset_type type;
-
/* Check attributes. */
if (attr & BITSET_FIXED && attr & BITSET_VARIABLE)
abort ();
if (attr & BITSET_SPARSE && attr & BITSET_DENSE)
abort ();
- /* Choose the type of bitset. Note that sometimes we will be asked
+ /* Choose the type of bitset. Note that sometimes we will be asked
for a zero length fixed size bitset. */
- type = BITSET_ARRAY;
- /* Currently, the simple bitsets do not support a variable size. */
- if (attr & BITSET_VARIABLE || attr & BITSET_SPARSE)
- {
- type = BITSET_LIST;
- if (attr & BITSET_DENSE || attr & BITSET_GREEDY)
- type = BITSET_TABLE;
- }
- return type;
+ /* If no attributes selected, choose a good compromise. */
+ if (!attr)
+ return BITSET_VARRAY;
+
+ if (attr & BITSET_SPARSE)
+ return BITSET_LIST;
+
+ if (attr & BITSET_FIXED)
+ return BITSET_ARRAY;
+
+ if (attr & BITSET_GREEDY)
+ return BITSET_TABLE;
+
+ return BITSET_VARRAY;
}
@@ -126,7 +138,7 @@ bitset_alloc (bitset_bindex n_bits, enum bitset_type type)
bytes = bitset_bytes (type, n_bits);
- bset = (bitset) xcalloc (1, bytes);
+ bset = xcalloc (1, bytes);
/* The cache is disabled until some elements are allocated. If we
have variable length arrays, then we may need to allocate a dummy
@@ -139,7 +151,7 @@ bitset_alloc (bitset_bindex n_bits, enum bitset_type type)
/* Create a bitset of N_BITS of type TYPE. */
bitset
bitset_obstack_alloc (struct obstack *bobstack,
- bitset_bindex n_bits, enum bitset_type type)
+ bitset_bindex n_bits, enum bitset_type type)
{
size_t bytes;
bitset bset;
@@ -223,6 +235,14 @@ bitset_next (bitset src, bitset_bindex bitno)
}
+/* Return true if both bitsets are of the same type and size. */
+extern bool
+bitset_compatible_p (bitset bset1, bitset bset2)
+{
+ return BITSET_COMPATIBLE_ (bset1, bset2);
+}
+
+
/* Find previous bit set in SRC starting from and including BITNO.
Return BITSET_BINDEX_MAX if SRC empty. */
bitset_bindex
@@ -276,18 +296,18 @@ bitset_print (FILE *file, bitset bset, bool verbose)
if (verbose)
fprintf (file, "n_bits = %lu, set = {",
- (unsigned long) bitset_size (bset));
+ (unsigned long int) bitset_size (bset));
pos = 30;
BITSET_FOR_EACH (iter, bset, i, 0)
{
if (pos > 70)
{
- fprintf (file, "\n");
- pos = 0;
+ fprintf (file, "\n");
+ pos = 0;
}
- fprintf (file, "%d ", i);
+ fprintf (file, "%lu ", (unsigned long int) i);
pos += 1 + (i >= 10) + (i >= 100);
};
@@ -304,7 +324,6 @@ bitset_dump (FILE *file, bitset bset)
}
-
/* Release memory associated with bitsets. */
void
bitset_release_memory (void)
@@ -314,7 +333,6 @@ bitset_release_memory (void)
}
-
/* Toggle bit BITNO in bitset BSET and the new value of the bit. */
bool
bitset_toggle_ (bitset bset, bitset_bindex bitno)
@@ -334,6 +352,14 @@ bitset_toggle_ (bitset bset, bitset_bindex bitno)
}
+/* Return number of bits in bitset SRC. */
+bitset_bindex
+bitset_size_ (bitset src)
+{
+ return BITSET_NBITS_ (src);
+}
+
+
/* Return number of bits set in bitset SRC. */
bitset_bindex
bitset_count_ (bitset src)
@@ -381,7 +407,7 @@ bitset_copy_ (bitset dst, bitset src)
four operand operations. */
static inline bool
bitset_op4_cmp (bitset dst, bitset src1, bitset src2, bitset src3,
- enum bitset_ops op)
+ enum bitset_ops op)
{
bool changed = false;
bool stats_enabled_save;
@@ -395,6 +421,9 @@ bitset_op4_cmp (bitset dst, bitset src1, bitset src2, bitset src3,
switch (op)
{
+ default:
+ abort ();
+
case BITSET_OP_OR_AND:
bitset_or (tmp, src1, src2);
changed = bitset_and_cmp (dst, src3, tmp);
@@ -409,9 +438,6 @@ bitset_op4_cmp (bitset dst, bitset src1, bitset src2, bitset src3,
bitset_andn (tmp, src1, src2);
changed = bitset_or_cmp (dst, src3, tmp);
break;
-
- default:
- abort ();
}
bitset_free (tmp);