mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
d4d399fcce
(abitset_bytes): Return a size that is aligned properly for vectors of objects. Do not assume that adding a header size to a multiple of a word size yields a value that is properly aligned for the whole union. (abitset_ones, abitset_zero, abitset_empty_p, abitset_copy1, abitset_not, abitset_equal_p, abitset_subset_p, abitset_disjoint_p, abitset_and, abitset_and_cmp, abitset_andn, abitset_andn_cmp, abitset_or, abitset_or_cmp, abitset_xor, abitset_xor_cmp, abitset_and_or, abitset_and_or_cmp, abitset_andn_or, abitset_andn_or_cmp, abitset_or_and, abitset_or_and_cmp, abitset_copy): Supply prototype decls, to improve the type-checking that GCC can do. (struct abitset_struct, abitset, struct bitset_struct): Remove.
946 lines
20 KiB
C
946 lines
20 KiB
C
/* Array bitsets.
|
|
Copyright (C) 2002 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
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "abitset.h"
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/* This file implements fixed size bitsets stored as an array
|
|
of words. Any unused bits in the last word must be zero. */
|
|
|
|
static void abitset_unused_clear PARAMS ((bitset));
|
|
static void abitset_ones PARAMS ((bitset));
|
|
static void abitset_zero PARAMS ((bitset));
|
|
static int abitset_empty_p PARAMS ((bitset));
|
|
static void abitset_copy1 PARAMS ((bitset, bitset));
|
|
static void abitset_not PARAMS ((bitset, bitset));
|
|
static int abitset_equal_p PARAMS ((bitset, bitset));
|
|
static int abitset_subset_p PARAMS ((bitset, bitset));
|
|
static int abitset_disjoint_p PARAMS ((bitset, bitset));
|
|
static void abitset_and PARAMS ((bitset, bitset, bitset));
|
|
static int abitset_and_cmp PARAMS ((bitset, bitset, bitset));
|
|
static void abitset_andn PARAMS ((bitset, bitset, bitset));
|
|
static int abitset_andn_cmp PARAMS ((bitset, bitset, bitset));
|
|
static void abitset_or PARAMS ((bitset, bitset, bitset));
|
|
static int abitset_or_cmp PARAMS ((bitset, bitset, bitset));
|
|
static void abitset_xor PARAMS ((bitset, bitset, bitset));
|
|
static int abitset_xor_cmp PARAMS ((bitset, bitset, bitset));
|
|
static void abitset_and_or PARAMS ((bitset, bitset, bitset, bitset));
|
|
static int abitset_and_or_cmp PARAMS ((bitset, bitset, bitset, bitset));
|
|
static void abitset_andn_or PARAMS ((bitset, bitset, bitset, bitset));
|
|
static int abitset_andn_or_cmp PARAMS ((bitset, bitset, bitset, bitset));
|
|
static void abitset_or_and PARAMS ((bitset, bitset, bitset, bitset));
|
|
static int abitset_or_and_cmp PARAMS ((bitset, bitset, bitset, bitset));
|
|
static void abitset_copy PARAMS ((bitset, bitset));
|
|
|
|
static bitset_bindex abitset_small_list PARAMS ((bitset, bitset_bindex *,
|
|
bitset_bindex,
|
|
bitset_bindex *));
|
|
|
|
static void abitset_set PARAMS ((bitset, bitset_bindex));
|
|
static void abitset_reset PARAMS ((bitset, bitset_bindex));
|
|
static int abitset_test PARAMS ((bitset, bitset_bindex));
|
|
static bitset_bindex abitset_size PARAMS ((bitset));
|
|
static bitset_bindex abitset_list PARAMS ((bitset, bitset_bindex *,
|
|
bitset_bindex, bitset_bindex *));
|
|
static bitset_bindex abitset_list_reverse
|
|
PARAMS ((bitset, bitset_bindex *, bitset_bindex, bitset_bindex *));
|
|
|
|
#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 (src)
|
|
bitset src;
|
|
{
|
|
return ABITSET_N_BITS (src);
|
|
}
|
|
|
|
|
|
/* 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 (src, list, num, next)
|
|
bitset src;
|
|
bitset_bindex *list;
|
|
bitset_bindex num;
|
|
bitset_bindex *next;
|
|
{
|
|
bitset_bindex bitno;
|
|
bitset_bindex count;
|
|
bitset_windex size;
|
|
bitset_word word;
|
|
|
|
word = ABITSET_WORDS (src)[0];
|
|
|
|
/* Short circuit common case. */
|
|
if (!word)
|
|
return 0;
|
|
|
|
size = ABITSET_N_BITS (src);
|
|
bitno = *next;
|
|
if (bitno >= size)
|
|
return 0;
|
|
|
|
word >>= bitno;
|
|
|
|
/* If num is 1, we could speed things up with a binary search
|
|
of the word of interest. */
|
|
|
|
if (num >= BITSET_WORD_BITS)
|
|
{
|
|
for (count = 0; word; bitno++)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
|
|
*next = bitno;
|
|
return count;
|
|
}
|
|
|
|
|
|
/* Set bit BITNO in bitset DST. */
|
|
static void
|
|
abitset_set (dst, bitno)
|
|
bitset dst ATTRIBUTE_UNUSED;
|
|
bitset_bindex bitno ATTRIBUTE_UNUSED;
|
|
{
|
|
/* This should never occur for abitsets since we should always
|
|
hit the cache. */
|
|
abort ();
|
|
}
|
|
|
|
|
|
/* Reset bit BITNO in bitset DST. */
|
|
static void
|
|
abitset_reset (dst, bitno)
|
|
bitset dst ATTRIBUTE_UNUSED;
|
|
bitset_bindex bitno ATTRIBUTE_UNUSED;
|
|
{
|
|
/* This should never occur for abitsets since we should always
|
|
hit the cache. */
|
|
abort ();
|
|
}
|
|
|
|
|
|
/* Test bit BITNO in bitset SRC. */
|
|
static int
|
|
abitset_test (src, bitno)
|
|
bitset src ATTRIBUTE_UNUSED;
|
|
bitset_bindex bitno ATTRIBUTE_UNUSED;
|
|
{
|
|
/* This should never occur for abitsets since we should always
|
|
hit the cache. */
|
|
abort ();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Find list of up to NUM bits set in BSET in reverse order, 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_list_reverse (src, list, num, next)
|
|
bitset src;
|
|
bitset_bindex *list;
|
|
bitset_bindex num;
|
|
bitset_bindex *next;
|
|
{
|
|
bitset_bindex bitno;
|
|
bitset_bindex rbitno;
|
|
bitset_bindex count;
|
|
bitset_windex windex;
|
|
unsigned int bitcnt;
|
|
bitset_bindex bitoff;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_bindex n_bits = ABITSET_N_BITS (src);
|
|
|
|
rbitno = *next;
|
|
|
|
/* If num is 1, we could speed things up with a binary search
|
|
of the word of interest. */
|
|
|
|
if (rbitno >= n_bits)
|
|
return 0;
|
|
|
|
count = 0;
|
|
|
|
bitno = n_bits - (rbitno + 1);
|
|
|
|
windex = bitno / BITSET_WORD_BITS;
|
|
bitcnt = bitno % BITSET_WORD_BITS;
|
|
bitoff = windex * BITSET_WORD_BITS;
|
|
|
|
do
|
|
{
|
|
bitset_word word;
|
|
|
|
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;
|
|
}
|
|
bitoff -= BITSET_WORD_BITS;
|
|
bitcnt = BITSET_WORD_BITS - 1;
|
|
}
|
|
while (windex--);
|
|
|
|
*next = n_bits - (bitoff + 1);
|
|
return count;
|
|
}
|
|
|
|
|
|
/* 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_list (src, list, num, next)
|
|
bitset src;
|
|
bitset_bindex *list;
|
|
bitset_bindex num;
|
|
bitset_bindex *next;
|
|
{
|
|
bitset_bindex bitno;
|
|
bitset_bindex count;
|
|
bitset_windex windex;
|
|
bitset_bindex bitoff;
|
|
bitset_windex size = src->b.csize;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word word;
|
|
|
|
bitno = *next;
|
|
|
|
count = 0;
|
|
if (!bitno)
|
|
{
|
|
/* Many bitsets are zero, so make this common case fast. */
|
|
for (windex = 0; windex < size && !srcp[windex]; windex++)
|
|
continue;
|
|
if (windex >= size)
|
|
return 0;
|
|
|
|
/* If num is 1, we could speed things up with a binary search
|
|
of the current word. */
|
|
|
|
bitoff = windex * BITSET_WORD_BITS;
|
|
}
|
|
else
|
|
{
|
|
if (bitno >= ABITSET_N_BITS (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++;
|
|
}
|
|
bitoff = windex * BITSET_WORD_BITS;
|
|
}
|
|
|
|
for (; windex < size; windex++, bitoff += BITSET_WORD_BITS)
|
|
{
|
|
if (!(word = srcp[windex]))
|
|
continue;
|
|
|
|
if ((count + BITSET_WORD_BITS) < num)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
*next = bitoff;
|
|
return count;
|
|
}
|
|
|
|
|
|
/* Ensure that any unused bits within the last word are clear. */
|
|
static inline void
|
|
abitset_unused_clear (dst)
|
|
bitset dst;
|
|
{
|
|
unsigned int last_bit;
|
|
|
|
last_bit = ABITSET_N_BITS (dst) % BITSET_WORD_BITS;
|
|
if (last_bit)
|
|
ABITSET_WORDS (dst)[dst->b.csize - 1] &=
|
|
((bitset_word) 1 << last_bit) - 1;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_ones (dst)
|
|
bitset dst;
|
|
{
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
size_t bytes;
|
|
|
|
bytes = sizeof (bitset_word) * dst->b.csize;
|
|
|
|
memset (dstp, -1, bytes);
|
|
abitset_unused_clear (dst);
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_zero (dst)
|
|
bitset dst;
|
|
{
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
size_t bytes;
|
|
|
|
bytes = sizeof (bitset_word) * dst->b.csize;
|
|
|
|
memset (dstp, 0, bytes);
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_empty_p (dst)
|
|
bitset dst;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
|
|
for (i = 0; i < dst->b.csize; i++)
|
|
if (dstp[i])
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_copy1 (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
if (srcp == dstp)
|
|
return;
|
|
memcpy (dstp, srcp, sizeof (bitset_word) * size);
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_not (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = ~(*srcp++);
|
|
abitset_unused_clear (dst);
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_equal_p (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
if (*srcp++ != *dstp++)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_subset_p (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++, srcp++)
|
|
if (*dstp != (*srcp | *dstp))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_disjoint_p (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *srcp = ABITSET_WORDS (src);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
if (*srcp++ & *dstp++)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_and (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = *src1p++ & *src2p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_and_cmp (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = *src1p++ & *src2p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_andn (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = *src1p++ & ~(*src2p++);
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_andn_cmp (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = *src1p++ & ~(*src2p++);
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_or (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = *src1p++ | *src2p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_or_cmp (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = *src1p++ | *src2p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_xor (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = *src1p++ ^ *src2p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_xor_cmp (dst, src1, src2)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = *src1p++ ^ *src2p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_and_or (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = (*src1p++ & *src2p++) | *src3p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_and_or_cmp (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = (*src1p++ & *src2p++) | *src3p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_andn_or (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = (*src1p++ & ~(*src2p++)) | *src3p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_andn_or_cmp (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = (*src1p++ & ~(*src2p++)) | *src3p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_or_and (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++)
|
|
*dstp++ = (*src1p++ | *src2p++) & *src3p++;
|
|
}
|
|
|
|
|
|
static int
|
|
abitset_or_and_cmp (dst, src1, src2, src3)
|
|
bitset dst;
|
|
bitset src1;
|
|
bitset src2;
|
|
bitset src3;
|
|
{
|
|
bitset_windex i;
|
|
int changed = 0;
|
|
bitset_word *src1p = ABITSET_WORDS (src1);
|
|
bitset_word *src2p = ABITSET_WORDS (src2);
|
|
bitset_word *src3p = ABITSET_WORDS (src3);
|
|
bitset_word *dstp = ABITSET_WORDS (dst);
|
|
bitset_windex size = dst->b.csize;
|
|
|
|
for (i = 0; i < size; i++, dstp++)
|
|
{
|
|
bitset_word tmp = (*src1p++ | *src2p++) & *src3p++;
|
|
|
|
if (*dstp != tmp)
|
|
{
|
|
changed = 1;
|
|
*dstp = tmp;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
static void
|
|
abitset_copy (dst, src)
|
|
bitset dst;
|
|
bitset src;
|
|
{
|
|
if (BITSET_COMPATIBLE_ (dst, src))
|
|
abitset_copy1 (dst, src);
|
|
else
|
|
bitset_copy_ (dst, src);
|
|
}
|
|
|
|
|
|
/* Vector of operations for single word bitsets. */
|
|
struct bitset_vtable abitset_small_vtable = {
|
|
abitset_set,
|
|
abitset_reset,
|
|
bitset_toggle_,
|
|
abitset_test,
|
|
abitset_size,
|
|
bitset_count_,
|
|
abitset_empty_p,
|
|
abitset_ones,
|
|
abitset_zero,
|
|
abitset_copy,
|
|
abitset_disjoint_p,
|
|
abitset_equal_p,
|
|
abitset_not,
|
|
abitset_subset_p,
|
|
abitset_and,
|
|
abitset_and_cmp,
|
|
abitset_andn,
|
|
abitset_andn_cmp,
|
|
abitset_or,
|
|
abitset_or_cmp,
|
|
abitset_xor,
|
|
abitset_xor_cmp,
|
|
abitset_and_or,
|
|
abitset_and_or_cmp,
|
|
abitset_andn_or,
|
|
abitset_andn_or_cmp,
|
|
abitset_or_and,
|
|
abitset_or_and_cmp,
|
|
abitset_small_list,
|
|
abitset_list_reverse,
|
|
NULL,
|
|
BITSET_ARRAY
|
|
};
|
|
|
|
|
|
/* Vector of operations for multiple word bitsets. */
|
|
struct bitset_vtable abitset_vtable = {
|
|
abitset_set,
|
|
abitset_reset,
|
|
bitset_toggle_,
|
|
abitset_test,
|
|
abitset_size,
|
|
bitset_count_,
|
|
abitset_empty_p,
|
|
abitset_ones,
|
|
abitset_zero,
|
|
abitset_copy,
|
|
abitset_disjoint_p,
|
|
abitset_equal_p,
|
|
abitset_not,
|
|
abitset_subset_p,
|
|
abitset_and,
|
|
abitset_and_cmp,
|
|
abitset_andn,
|
|
abitset_andn_cmp,
|
|
abitset_or,
|
|
abitset_or_cmp,
|
|
abitset_xor,
|
|
abitset_xor_cmp,
|
|
abitset_and_or,
|
|
abitset_and_or_cmp,
|
|
abitset_andn_or,
|
|
abitset_andn_or_cmp,
|
|
abitset_or_and,
|
|
abitset_or_and_cmp,
|
|
abitset_list,
|
|
abitset_list_reverse,
|
|
NULL,
|
|
BITSET_ARRAY
|
|
};
|
|
|
|
|
|
size_t
|
|
abitset_bytes (n_bits)
|
|
bitset_bindex n_bits;
|
|
{
|
|
bitset_windex size;
|
|
size_t bytes;
|
|
size_t header_size = offsetof (union bitset_union, a.words);
|
|
struct bitset_align_struct { char a; union bitset_union b; };
|
|
size_t bitset_alignment = offsetof (struct bitset_align_struct, b);
|
|
|
|
size = ABITSET_N_WORDS (n_bits);
|
|
bytes = header_size + size * sizeof (bitset_word);
|
|
|
|
/* Align the size properly for a vector of abitset objects. */
|
|
if (header_size % bitset_alignment != 0
|
|
|| sizeof (bitset_word) % bitset_alignment != 0)
|
|
{
|
|
bytes += bitset_alignment - 1;
|
|
bytes -= bytes % bitset_alignment;
|
|
}
|
|
|
|
return bytes;
|
|
}
|
|
|
|
|
|
bitset
|
|
abitset_init (bset, n_bits)
|
|
bitset bset;
|
|
bitset_bindex n_bits;
|
|
{
|
|
bitset_windex size;
|
|
|
|
size = ABITSET_N_WORDS (n_bits);
|
|
ABITSET_N_BITS (bset) = n_bits;
|
|
|
|
/* Use optimized routines if bitset fits within a single word.
|
|
There is probably little merit if using caching since
|
|
the small bitset will always fit in the cache. */
|
|
if (size == 1)
|
|
bset->b.vtable = &abitset_small_vtable;
|
|
else
|
|
bset->b.vtable = &abitset_vtable;
|
|
|
|
bset->b.cindex = 0;
|
|
bset->b.csize = size;
|
|
bset->b.cdata = ABITSET_WORDS (bset);
|
|
return bset;
|
|
}
|