X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d08290769c798befc27e9f8bbc3f1a3da12d1f08..f122444873a1ec499d25ffec5765dcc48dc7b928:/lib/abitset.c
diff --git a/lib/abitset.c b/lib/abitset.c
index 99c1c2f1..f876996b 100644
--- a/lib/abitset.c
+++ b/lib/abitset.c
@@ -1,10 +1,13 @@
/* Array bitsets.
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2002-2003, 2006, 2009-2013 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,
@@ -13,13 +16,9 @@
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 "abitset.h"
#include
@@ -31,23 +30,24 @@
#define ABITSET_N_WORDS(N) (((N) + BITSET_WORD_BITS - 1) / BITSET_WORD_BITS)
#define ABITSET_WORDS(X) ((X)->a.words)
-#define ABITSET_N_BITS(X) ((X)->a.n_bits)
-/* Return size in bits of bitset SRC. */
static bitset_bindex
-abitset_size (bitset src)
+abitset_resize (bitset src, bitset_bindex size)
{
- return ABITSET_N_BITS (src);
-}
+ /* These bitsets have a fixed size. */
+ if (BITSET_SIZE_ (src) != size)
+ abort ();
+ return size;
+}
/* Find list of up to NUM bits set in BSET starting from and including
*NEXT and store in array LIST. Return with actual number of bits
found and with *NEXT indicating where search stopped. */
static bitset_bindex
abitset_small_list (bitset src, bitset_bindex *list,
- bitset_bindex num, bitset_bindex *next)
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex bitno;
bitset_bindex count;
@@ -60,7 +60,7 @@ abitset_small_list (bitset src, bitset_bindex *list,
if (!word)
return 0;
- size = ABITSET_N_BITS (src);
+ size = BITSET_SIZE_ (src);
bitno = *next;
if (bitno >= size)
return 0;
@@ -73,27 +73,27 @@ abitset_small_list (bitset src, bitset_bindex *list,
if (num >= BITSET_WORD_BITS)
{
for (count = 0; word; bitno++)
- {
- if (word & 1)
- list[count++] = bitno;
- word >>= 1;
- }
+ {
+ if (word & 1)
+ list[count++] = bitno;
+ word >>= 1;
+ }
}
else
{
for (count = 0; word; bitno++)
- {
- if (word & 1)
- {
- list[count++] = bitno;
- if (count >= num)
- {
- bitno++;
- break;
- }
- }
- word >>= 1;
- }
+ {
+ if (word & 1)
+ {
+ list[count++] = bitno;
+ if (count >= num)
+ {
+ bitno++;
+ break;
+ }
+ }
+ word >>= 1;
+ }
}
*next = bitno;
@@ -105,8 +105,9 @@ abitset_small_list (bitset src, bitset_bindex *list,
static void
abitset_set (bitset dst ATTRIBUTE_UNUSED, bitset_bindex bitno ATTRIBUTE_UNUSED)
{
- /* This should never occur for abitsets since we should always
- hit the cache. */
+ /* This should never occur for abitsets since we should always hit
+ the cache. It is likely someone is trying to access outside the
+ bounds of the bitset. */
abort ();
}
@@ -114,22 +115,21 @@ abitset_set (bitset dst ATTRIBUTE_UNUSED, bitset_bindex bitno ATTRIBUTE_UNUSED)
/* Reset bit BITNO in bitset DST. */
static void
abitset_reset (bitset dst ATTRIBUTE_UNUSED,
- bitset_bindex bitno ATTRIBUTE_UNUSED)
+ bitset_bindex bitno ATTRIBUTE_UNUSED)
{
- /* This should never occur for abitsets since we should always
- hit the cache. */
- abort ();
+ /* This should never occur for abitsets since we should always hit
+ the cache. It is likely someone is trying to access outside the
+ bounds of the bitset. Since the bit is zero anyway, let it pass. */
}
/* Test bit BITNO in bitset SRC. */
static bool
abitset_test (bitset src ATTRIBUTE_UNUSED,
- bitset_bindex bitno ATTRIBUTE_UNUSED)
+ bitset_bindex bitno ATTRIBUTE_UNUSED)
{
/* This should never occur for abitsets since we should always
hit the cache. */
- abort ();
return false;
}
@@ -140,7 +140,7 @@ abitset_test (bitset src ATTRIBUTE_UNUSED,
stopped. */
static bitset_bindex
abitset_list_reverse (bitset src, bitset_bindex *list,
- bitset_bindex num, bitset_bindex *next)
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex bitno;
bitset_bindex rbitno;
@@ -149,7 +149,7 @@ abitset_list_reverse (bitset src, bitset_bindex *list,
unsigned int bitcnt;
bitset_bindex bitoff;
bitset_word *srcp = ABITSET_WORDS (src);
- bitset_bindex n_bits = ABITSET_N_BITS (src);
+ bitset_bindex n_bits = BITSET_SIZE_ (src);
rbitno = *next;
@@ -173,18 +173,18 @@ abitset_list_reverse (bitset src, bitset_bindex *list,
word = srcp[windex] << (BITSET_WORD_BITS - 1 - bitcnt);
for (; word; bitcnt--)
- {
- if (word & BITSET_MSB)
- {
- list[count++] = bitoff + bitcnt;
- if (count >= num)
- {
- *next = n_bits - (bitoff + bitcnt);
- return count;
- }
- }
- word <<= 1;
- }
+ {
+ if (word & BITSET_MSB)
+ {
+ list[count++] = bitoff + bitcnt;
+ if (count >= num)
+ {
+ *next = n_bits - (bitoff + bitcnt);
+ return count;
+ }
+ }
+ word <<= 1;
+ }
bitoff -= BITSET_WORD_BITS;
bitcnt = BITSET_WORD_BITS - 1;
}
@@ -200,7 +200,7 @@ abitset_list_reverse (bitset src, bitset_bindex *list,
found and with *NEXT indicating where search stopped. */
static bitset_bindex
abitset_list (bitset src, bitset_bindex *list,
- bitset_bindex num, bitset_bindex *next)
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex bitno;
bitset_bindex count;
@@ -217,80 +217,80 @@ abitset_list (bitset src, bitset_bindex *list,
{
/* Many bitsets are zero, so make this common case fast. */
for (windex = 0; windex < size && !srcp[windex]; windex++)
- continue;
+ continue;
if (windex >= size)
- return 0;
+ return 0;
/* If num is 1, we could speed things up with a binary search
- of the current word. */
+ of the current word. */
bitoff = windex * BITSET_WORD_BITS;
}
else
{
- if (bitno >= ABITSET_N_BITS (src))
- return 0;
+ if (bitno >= BITSET_SIZE_ (src))
+ return 0;
windex = bitno / BITSET_WORD_BITS;
bitno = bitno % BITSET_WORD_BITS;
if (bitno)
- {
- /* Handle the case where we start within a word.
- Most often, this is executed with large bitsets
- with many set bits where we filled the array
- on the previous call to this function. */
-
- bitoff = windex * BITSET_WORD_BITS;
- word = srcp[windex] >> bitno;
- for (bitno = bitoff + bitno; word; bitno++)
- {
- if (word & 1)
- {
- list[count++] = bitno;
- if (count >= num)
- {
- *next = bitno + 1;
- return count;
- }
- }
- word >>= 1;
- }
- windex++;
- }
+ {
+ /* Handle the case where we start within a word.
+ Most often, this is executed with large bitsets
+ with many set bits where we filled the array
+ on the previous call to this function. */
+
+ bitoff = windex * BITSET_WORD_BITS;
+ word = srcp[windex] >> bitno;
+ for (bitno = bitoff + bitno; word; bitno++)
+ {
+ if (word & 1)
+ {
+ list[count++] = bitno;
+ if (count >= num)
+ {
+ *next = bitno + 1;
+ return count;
+ }
+ }
+ word >>= 1;
+ }
+ windex++;
+ }
bitoff = windex * BITSET_WORD_BITS;
}
for (; windex < size; windex++, bitoff += BITSET_WORD_BITS)
{
if (!(word = srcp[windex]))
- continue;
+ continue;
if ((count + BITSET_WORD_BITS) < num)
- {
- for (bitno = bitoff; word; bitno++)
- {
- if (word & 1)
- list[count++] = bitno;
- word >>= 1;
- }
- }
+ {
+ for (bitno = bitoff; word; bitno++)
+ {
+ if (word & 1)
+ list[count++] = bitno;
+ word >>= 1;
+ }
+ }
else
- {
- for (bitno = bitoff; word; bitno++)
- {
- if (word & 1)
- {
- list[count++] = bitno;
- if (count >= num)
- {
- *next = bitno + 1;
- return count;
- }
- }
- word >>= 1;
- }
- }
+ {
+ for (bitno = bitoff; word; bitno++)
+ {
+ if (word & 1)
+ {
+ list[count++] = bitno;
+ if (count >= num)
+ {
+ *next = bitno + 1;
+ return count;
+ }
+ }
+ word >>= 1;
+ }
+ }
}
*next = bitoff;
@@ -304,7 +304,7 @@ abitset_unused_clear (bitset dst)
{
unsigned int last_bit;
- last_bit = ABITSET_N_BITS (dst) % BITSET_WORD_BITS;
+ last_bit = BITSET_SIZE_ (dst) % BITSET_WORD_BITS;
if (last_bit)
ABITSET_WORDS (dst)[dst->b.csize - 1] &=
((bitset_word) 1 << last_bit) - 1;
@@ -387,7 +387,7 @@ abitset_equal_p (bitset dst, bitset src)
for (i = 0; i < size; i++)
if (*srcp++ != *dstp++)
- return false;
+ return false;
return true;
}
@@ -402,7 +402,7 @@ abitset_subset_p (bitset dst, bitset src)
for (i = 0; i < size; i++, dstp++, srcp++)
if (*dstp != (*srcp | *dstp))
- return false;
+ return false;
return true;
}
@@ -417,7 +417,7 @@ abitset_disjoint_p (bitset dst, bitset src)
for (i = 0; i < size; i++)
if (*srcp++ & *dstp++)
- return false;
+ return false;
return true;
}
@@ -452,10 +452,10 @@ abitset_and_cmp (bitset dst, bitset src1, bitset src2)
bitset_word tmp = *src1p++ & *src2p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -490,10 +490,10 @@ abitset_andn_cmp (bitset dst, bitset src1, bitset src2)
bitset_word tmp = *src1p++ & ~(*src2p++);
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -528,10 +528,10 @@ abitset_or_cmp (bitset dst, bitset src1, bitset src2)
bitset_word tmp = *src1p++ | *src2p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -566,10 +566,10 @@ abitset_xor_cmp (bitset dst, bitset src1, bitset src2)
bitset_word tmp = *src1p++ ^ *src2p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -606,10 +606,10 @@ abitset_and_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
bitset_word tmp = (*src1p++ & *src2p++) | *src3p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -646,10 +646,10 @@ abitset_andn_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
bitset_word tmp = (*src1p++ & ~(*src2p++)) | *src3p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -686,10 +686,10 @@ abitset_or_and_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
bitset_word tmp = (*src1p++ | *src2p++) & *src3p++;
if (*dstp != tmp)
- {
- changed = true;
- *dstp = tmp;
- }
+ {
+ changed = true;
+ *dstp = tmp;
+ }
}
return changed;
}
@@ -711,7 +711,8 @@ struct bitset_vtable abitset_small_vtable = {
abitset_reset,
bitset_toggle_,
abitset_test,
- abitset_size,
+ abitset_resize,
+ bitset_size_,
bitset_count_,
abitset_empty_p,
abitset_ones,
@@ -748,7 +749,8 @@ struct bitset_vtable abitset_vtable = {
abitset_reset,
bitset_toggle_,
abitset_test,
- abitset_size,
+ abitset_resize,
+ bitset_size_,
bitset_count_,
abitset_empty_p,
abitset_ones,
@@ -809,7 +811,7 @@ abitset_init (bitset bset, bitset_bindex n_bits)
bitset_windex size;
size = ABITSET_N_WORDS (n_bits);
- ABITSET_N_BITS (bset) = n_bits;
+ BITSET_NBITS_ (bset) = n_bits;
/* Use optimized routines if bitset fits within a single word.
There is probably little merit if using caching since