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. */
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include "bbitset.h"
+#include "lbitset.h"
#include "obstack.h"
+#include <stddef.h>
#include <stdlib.h>
+#include <stdio.h>
/* This file implements linked-list bitsets. These bitsets can be of
arbitrary length and are more efficient than arrays of bits for
but the more memory wasted for sparse bitsets and the longer the time
to search for set bits. */
-#ifndef LBITSET_ELT_WORDS
#define LBITSET_ELT_WORDS 2
-#endif
typedef bitset_word lbitset_word;
lbitset_elt;
-/* Head of lbitset linked list. */
-typedef struct lbitset_struct
-{
- lbitset_elt *head; /* First element in linked list. */
- lbitset_elt *tail; /* Last element in linked list. */
-}
-*lbitset;
-
-
-struct bitset_struct
-{
- struct bbitset_struct b;
- struct lbitset_struct l;
-};
-
-
enum lbitset_find_mode
{ LBITSET_FIND, LBITSET_CREATE, LBITSET_SUBST };
-static lbitset_elt lbitset_zero_elts[3]; /* Elements of all zero bits. */
+static lbitset_elt lbitset_zero_elts[3]; /* Elements of all zero bits. */
/* Obstack to allocate bitset elements from. */
static struct obstack lbitset_obstack;
static int lbitset_obstack_init = 0;
static lbitset_elt *lbitset_free_list; /* Free list of bitset elements. */
-static lbitset_elt *lbitset_elt_alloc PARAMS ((void));
-static lbitset_elt *lbitset_elt_calloc PARAMS ((void));
-static void lbitset_elt_link PARAMS ((bitset, lbitset_elt *));
-static void lbitset_elt_unlink PARAMS ((bitset, lbitset_elt *));
-static void lbitset_elt_free PARAMS ((lbitset_elt *));
-static lbitset_elt *lbitset_elt_find PARAMS ((bitset, bitset_windex,
- enum lbitset_find_mode));
-static int lbitset_elt_zero_p PARAMS ((lbitset_elt *));
-
-static void lbitset_prune PARAMS ((bitset, lbitset_elt *));
-static void lbitset_weed PARAMS ((bitset));
-static void lbitset_zero PARAMS ((bitset));
-static int lbitset_equal_p PARAMS ((bitset, bitset));
-static void lbitset_copy PARAMS ((bitset, bitset));
-static int lbitset_copy_compare PARAMS ((bitset, bitset));
-static void lbitset_set PARAMS ((bitset, bitset_bindex));
-static void lbitset_reset PARAMS ((bitset, bitset_bindex));
-static int lbitset_test PARAMS ((bitset, bitset_bindex));
-static int lbitset_size PARAMS ((bitset));
-static int lbitset_op1 PARAMS ((bitset, enum bitset_ops));
-static int lbitset_op2 PARAMS ((bitset, bitset, enum bitset_ops));
-static int lbitset_op3 PARAMS ((bitset, bitset, bitset, enum bitset_ops));
-static int lbitset_list PARAMS ((bitset, bitset_bindex *, bitset_bindex,
- bitset_bindex *));
-static int lbitset_reverse_list
-PARAMS ((bitset, bitset_bindex *, bitset_bindex, bitset_bindex *));
-static void lbitset_free PARAMS ((bitset));
-
-
-#define LBITSET_CURRENT1(X) (lbitset_elt *)((char *)(X) + ((char *)&(((lbitset_elt *)(X))->next) - (char *)&(((lbitset_elt *)(X))->words)))
+extern void debug_lbitset PARAMS ((bitset));
+
+#define LBITSET_CURRENT1(X) \
+ ((lbitset_elt *) (void *) ((char *) (X) - offsetof (lbitset_elt, words)))
#define LBITSET_CURRENT(X) LBITSET_CURRENT1((X)->b.cdata)
/* Allocate a lbitset element. The bits are not cleared. */
static inline lbitset_elt *
-lbitset_elt_alloc ()
+lbitset_elt_alloc (void)
{
lbitset_elt *elt;
}
else
{
- /* We can't use gcc_obstack_init to initialize the obstack since
- print-rtl.c now calls bitset functions, and bitset is linked
- into the gen* functions. */
if (!lbitset_obstack_init)
{
lbitset_obstack_init = 1;
}
-/* Allocate a lbitset element. The bits are not cleared. */
+/* Allocate a lbitset element. The bits are cleared. */
static inline lbitset_elt *
-lbitset_elt_calloc ()
+lbitset_elt_calloc (void)
{
lbitset_elt *elt;
static inline void
-lbitset_elt_free (elt)
- lbitset_elt *elt;
+lbitset_elt_free (lbitset_elt *elt)
{
elt->next = lbitset_free_list;
lbitset_free_list = elt;
/* Unlink element ELT from bitset BSET. */
static inline void
-lbitset_elt_unlink (bset, elt)
- bitset bset;
- lbitset_elt *elt;
+lbitset_elt_unlink (bitset bset, lbitset_elt *elt)
{
lbitset_elt *next = elt->next;
lbitset_elt *prev = elt->prev;
/* Cut the chain of bitset BSET before element ELT and free the
elements. */
static inline void
-lbitset_prune (bset, elt)
- bitset bset;
- lbitset_elt *elt;
+lbitset_prune (bitset bset, lbitset_elt *elt)
{
lbitset_elt *next;
/* Return nonzero if all bits in an element are zero. */
static inline int
-lbitset_elt_zero_p (elt)
- lbitset_elt *elt;
+lbitset_elt_zero_p (lbitset_elt *elt)
{
int i;
/* Link the bitset element into the current bitset linked list. */
static inline void
-lbitset_elt_link (bset, elt)
- bitset bset;
- lbitset_elt *elt;
+lbitset_elt_link (bitset bset, lbitset_elt *elt)
{
- bitset_windex index = elt->index;
+ bitset_windex windex = elt->index;
lbitset_elt *ptr;
lbitset_elt *current;
/* If this index is less than that of the current element, it goes
somewhere before the current element. */
- else if (index < bset->b.cindex)
+ else if (windex < bset->b.cindex)
{
for (ptr = current;
- ptr->prev && ptr->prev->index > index; ptr = ptr->prev)
+ ptr->prev && ptr->prev->index > windex; ptr = ptr->prev)
continue;
if (ptr->prev)
else
{
for (ptr = current;
- ptr->next && ptr->next->index < index; ptr = ptr->next)
+ ptr->next && ptr->next->index < windex; ptr = ptr->next)
continue;
if (ptr->next)
}
/* Set up so this is the first element searched. */
- bset->b.cindex = index;
+ bset->b.cindex = windex;
bset->b.csize = LBITSET_ELT_WORDS;
bset->b.cdata = elt->words;
}
static lbitset_elt *
-lbitset_elt_find (bset, index, mode)
- bitset bset;
- bitset_windex index;
- enum lbitset_find_mode mode;
+lbitset_elt_find (bitset bset, bitset_windex windex,
+ enum lbitset_find_mode mode)
{
lbitset_elt *elt;
lbitset_elt *current;
{
current = LBITSET_CURRENT (bset);
/* Check if element is the cached element. */
- if ((index - bset->b.cindex) < bset->b.csize)
+ if ((windex - bset->b.cindex) < bset->b.csize)
return current;
}
else
if (current)
{
- if (index < bset->b.cindex)
+ if (windex < bset->b.cindex)
{
for (elt = current;
- elt->prev && elt->index > index; elt = elt->prev)
+ elt->prev && elt->index > windex; elt = elt->prev)
continue;
}
else
{
for (elt = current;
- elt->next && (elt->index + LBITSET_ELT_WORDS - 1) < index;
+ elt->next && (elt->index + LBITSET_ELT_WORDS - 1) < windex;
elt = elt->next)
continue;
}
- /* `element' is the nearest to the one we want. If it's not the one
+ /* ELT is the nearest to the one we want. If it's not the one
we want, the one we want does not exist. */
- if (elt && (index - elt->index) < LBITSET_ELT_WORDS)
+ if (elt && (windex - elt->index) < LBITSET_ELT_WORDS)
{
bset->b.cindex = elt->index;
bset->b.csize = LBITSET_ELT_WORDS;
return 0;
case LBITSET_CREATE:
- index = (index / (unsigned) LBITSET_ELT_WORDS) * LBITSET_ELT_WORDS;
+ windex -= windex % LBITSET_ELT_WORDS;
elt = lbitset_elt_calloc ();
- elt->index = index;
+ elt->index = windex;
lbitset_elt_link (bset, elt);
return elt;
/* Weed out the zero elements from the list. */
static inline void
-lbitset_weed (bset)
- bitset bset;
+lbitset_weed (bitset bset)
{
lbitset_elt *elt;
lbitset_elt *next;
/* Set all bits in the bitset to zero. */
-static inline void
-lbitset_zero (bset)
- bitset bset;
+static void
+lbitset_zero (bitset bset)
{
lbitset_elt *head;
}
+/* Return 1 if DST == SRC. */
static inline int
-lbitset_equal_p (dst, src)
- bitset dst;
- bitset src;
+lbitset_equal_p (bitset dst, bitset src)
{
lbitset_elt *selt;
lbitset_elt *delt;
/* Copy bits from bitset SRC to bitset DST. */
static inline void
-lbitset_copy (dst, src)
- bitset dst;
- bitset src;
+lbitset_copy (bitset dst, bitset src)
{
lbitset_elt *elt;
lbitset_elt *head;
/* Copy bits from bitset SRC to bitset DST. Return non-zero if
bitsets different. */
static inline int
-lbitset_copy_compare (dst, src)
- bitset dst;
- bitset src;
+lbitset_copy_cmp (bitset dst, bitset src)
{
if (src == dst)
return 0;
/* Return size in bits of bitset SRC. */
-static int
-lbitset_size (src)
- bitset src;
+static bitset_bindex
+lbitset_size (bitset src)
{
lbitset_elt *elt;
/* Set bit BITNO in bitset DST. */
static void
-lbitset_set (dst, bitno)
- bitset dst;
- bitset_bindex bitno;
+lbitset_set (bitset dst, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- lbitset_elt_find (dst, index, LBITSET_CREATE);
+ lbitset_elt_find (dst, windex, LBITSET_CREATE);
- dst->b.cdata[index - dst->b.cindex] |= (1 << (bitno % BITSET_WORD_BITS));
+ dst->b.cdata[windex - dst->b.cindex] |=
+ (bitset_word) 1 << (bitno % BITSET_WORD_BITS);
}
/* Reset bit BITNO in bitset DST. */
static void
-lbitset_reset (dst, bitno)
- bitset dst;
- bitset_bindex bitno;
+lbitset_reset (bitset dst, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- if (!lbitset_elt_find (dst, index, LBITSET_FIND))
+ if (!lbitset_elt_find (dst, windex, LBITSET_FIND))
return;
- dst->b.cdata[index - dst->b.cindex] &= ~(1 << (bitno % BITSET_WORD_BITS));
+ dst->b.cdata[windex - dst->b.cindex] &=
+ ~((bitset_word) 1 << (bitno % BITSET_WORD_BITS));
/* If all the data is zero, perhaps we should unlink it now... */
}
/* Test bit BITNO in bitset SRC. */
static int
-lbitset_test (src, bitno)
- bitset src;
- bitset_bindex bitno;
+lbitset_test (bitset src, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- if (!lbitset_elt_find (src, index, LBITSET_FIND))
+ if (!lbitset_elt_find (src, windex, LBITSET_FIND))
return 0;
- return (src->b.
- cdata[index - src->b.cindex] >> (bitno % BITSET_WORD_BITS)) & 1;
+ return (src->b.cdata[windex - src->b.cindex]
+ >> (bitno % BITSET_WORD_BITS)) & 1;
}
static void
-lbitset_free (bset)
- bitset bset;
+lbitset_free (bitset bset)
{
lbitset_zero (bset);
}
/* 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 int
-lbitset_reverse_list (bset, list, num, next)
- bitset bset;
- bitset_bindex *list;
- bitset_bindex num;
- bitset_bindex *next;
+static bitset_bindex
+lbitset_list_reverse (bitset bset, bitset_bindex *list,
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex rbitno;
bitset_bindex bitno;
- unsigned int bitcnt;
- bitset_bindex bitoff;
- bitset_windex index;
+ unsigned int bcount;
+ bitset_bindex boffset;
+ bitset_windex windex;
bitset_bindex count;
lbitset_elt *elt;
bitset_word word;
bitno = n_bits - (rbitno + 1);
- index = bitno / BITSET_WORD_BITS;
+ windex = bitno / BITSET_WORD_BITS;
/* Skip back to starting element. */
- for (; elt && elt->index > index; elt = elt->prev)
+ for (; elt && elt->index > windex; elt = elt->prev)
continue;
if (!elt)
return 0;
- /* If num is 1, we could speed things up with a binary search
- of the word of interest. */
+ if (windex >= elt->index + LBITSET_ELT_WORDS)
+ {
+ /* We are trying to start in no-mans land so start
+ at end of current elt. */
+ bcount = BITSET_WORD_BITS - 1;
+ windex = elt->index + LBITSET_ELT_WORDS - 1;
+ }
+ else
+ {
+ bcount = bitno % BITSET_WORD_BITS;
+ }
count = 0;
- bitcnt = bitno % BITSET_WORD_BITS;
- bitoff = index * BITSET_WORD_BITS;
+ boffset = windex * BITSET_WORD_BITS;
+
+ /* If num is 1, we could speed things up with a binary search
+ of the word of interest. */
while (elt)
{
bitset_word *srcp = elt->words;
- for (; (index - elt->index) < LBITSET_ELT_WORDS;
- index--, bitoff -= BITSET_WORD_BITS,
- bitcnt = BITSET_WORD_BITS - 1)
+ for (; (windex - elt->index) < LBITSET_ELT_WORDS;
+ windex--, boffset -= BITSET_WORD_BITS,
+ bcount = BITSET_WORD_BITS - 1)
{
word =
- srcp[index - elt->index] << (BITSET_WORD_BITS - 1 - bitcnt);
+ srcp[windex - elt->index] << (BITSET_WORD_BITS - 1 - bcount);
- for (; word; bitcnt--)
+ for (; word; bcount--)
{
if (word & BITSET_MSB)
{
- list[count++] = bitoff + bitcnt;
+ list[count++] = boffset + bcount;
if (count >= num)
{
- *next = n_bits - (bitoff + bitcnt);
+ *next = n_bits - (boffset + bcount);
return count;
}
}
elt = elt->prev;
if (elt)
{
- index = elt->index + LBITSET_ELT_WORDS - 1;
- bitoff = index * BITSET_WORD_BITS;
+ windex = elt->index + LBITSET_ELT_WORDS - 1;
+ boffset = windex * BITSET_WORD_BITS;
}
}
- *next = n_bits - (bitoff + 1);
+ *next = n_bits - (boffset + 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 int
-lbitset_list (bset, list, num, next)
- bitset bset;
- bitset_bindex *list;
- bitset_bindex num;
- bitset_bindex *next;
+static bitset_bindex
+lbitset_list (bitset bset, bitset_bindex *list,
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex bitno;
- bitset_windex index;
+ bitset_windex windex;
bitset_bindex count;
lbitset_elt *elt;
lbitset_elt *head;
/* Start with the first element. */
elt = head;
- index = elt->index;
- bitno = index * BITSET_WORD_BITS;
+ windex = elt->index;
+ bitno = windex * BITSET_WORD_BITS;
}
else
{
- index = bitno / BITSET_WORD_BITS;
+ windex = bitno / BITSET_WORD_BITS;
/* Skip to starting element. */
for (elt = head;
- elt && (elt->index + LBITSET_ELT_WORDS - 1) < index;
+ elt && (elt->index + LBITSET_ELT_WORDS - 1) < windex;
elt = elt->next)
continue;
if (!elt)
return 0;
- if (index < elt->index)
+ if (windex < elt->index)
{
- index = elt->index;
- bitno = index * BITSET_WORD_BITS;
+ windex = elt->index;
+ bitno = windex * BITSET_WORD_BITS;
}
else
{
/* We are starting within an element. */
- for (; (index - elt->index) < LBITSET_ELT_WORDS; index++)
+ for (; (windex - elt->index) < LBITSET_ELT_WORDS; windex++)
{
- word = srcp[index - elt->index] >> (bitno % BITSET_WORD_BITS);
+ word = srcp[windex - elt->index] >> (bitno % BITSET_WORD_BITS);
for (; word; bitno++)
{
}
word >>= 1;
}
- bitno = (index + 1) * BITSET_WORD_BITS;
+ bitno = (windex + 1) * BITSET_WORD_BITS;
}
elt = elt->next;
if (elt)
{
- index = elt->index;
- bitno = index * BITSET_WORD_BITS;
+ windex = elt->index;
+ bitno = windex * BITSET_WORD_BITS;
}
}
}
word >>= 1;
}
}
- index++;
- bitno = index * BITSET_WORD_BITS;
+ windex++;
+ bitno = windex * BITSET_WORD_BITS;
word = srcp[1];
if (word)
word >>= 1;
}
}
- index++;
- bitno = index * BITSET_WORD_BITS;
+ windex++;
+ bitno = windex * BITSET_WORD_BITS;
#else
for (i = 0; i < LBITSET_ELT_WORDS; i++)
{
word >>= 1;
}
}
- index++;
- bitno = index * BITSET_WORD_BITS;
+ windex++;
+ bitno = windex * BITSET_WORD_BITS;
}
#endif
}
}
word >>= 1;
}
- index++;
- bitno = index * BITSET_WORD_BITS;
+ windex++;
+ bitno = windex * BITSET_WORD_BITS;
}
}
elt = elt->next;
if (elt)
{
- index = elt->index;
- bitno = index * BITSET_WORD_BITS;
+ windex = elt->index;
+ bitno = windex * BITSET_WORD_BITS;
}
}
static int
-lbitset_op1 (dst, op)
- bitset dst;
- enum bitset_ops op;
+lbitset_empty_p (bitset dst)
{
- unsigned int i;
- bitset_windex index;
- lbitset_elt *elt;
-
- switch (op)
- {
- case BITSET_OP_ZERO:
- lbitset_zero (dst);
- break;
+ lbitset_weed (dst);
+ if (LBITSET_HEAD (dst))
+ return 0;
+ return 1;
+}
- case BITSET_OP_ONES:
- /* This is a decidedly unfriendly operation for a linked list
- bitset! */
- elt = LBITSET_TAIL (dst);
- /* Ignore empty set. */
- if (!elt)
- return 0;
- index = elt->index;
- for (i = 0; i < index; i += LBITSET_ELT_WORDS)
- {
- /* Create new elements if they cannot be found. */
- elt = lbitset_elt_find (dst, i, LBITSET_CREATE);
- memset (elt->words, ~0, sizeof (elt->words));
- }
- break;
+static void
+lbitset_ones (bitset dst)
+{
+ bitset_windex i;
+ bitset_windex windex;
+ lbitset_elt *elt;
- case BITSET_OP_EMPTY_P:
- lbitset_weed (dst);
- if (LBITSET_HEAD (dst))
- return 0;
- break;
+ /* This is a decidedly unfriendly operation for a linked list
+ bitset! It makes a sparse bitset become dense. An alternative
+ is to have a flag that indicates that the bitset stores the
+ complement of what it indicates. */
+ elt = LBITSET_TAIL (dst);
+ /* Ignore empty set. */
+ if (!elt)
+ return;
- default:
- abort ();
+ windex = elt->index;
+ for (i = 0; i < windex; i += LBITSET_ELT_WORDS)
+ {
+ /* Create new elements if they cannot be found. */
+ elt = lbitset_elt_find (dst, i, LBITSET_CREATE);
+ memset (elt->words, -1, sizeof (elt->words));
}
-
- return 1;
}
-static int
-lbitset_op2 (dst, src, op)
- bitset dst;
- bitset src;
- enum bitset_ops op;
+static void
+lbitset_not (bitset dst, bitset src)
{
lbitset_elt *elt;
lbitset_elt *selt;
lbitset_elt *delt;
- unsigned int i;
+ bitset_windex i;
unsigned int j;
- bitset_windex index;
+ bitset_windex windex;
- switch (op)
- {
- case BITSET_OP_COPY:
- lbitset_copy (dst, src);
- break;
+ /* This is another unfriendly operation for a linked list
+ bitset! */
+ elt = LBITSET_TAIL (dst);
+ /* Ignore empty set. */
+ if (!elt)
+ return;
- case BITSET_OP_NOT:
- /* This is another unfriendly operation for a linked list
- bitset! */
- elt = LBITSET_TAIL (dst);
- /* Ignore empty set. */
- if (!elt)
- return 0;
+ windex = elt->index;
+ for (i = 0; i < windex; i += LBITSET_ELT_WORDS)
+ {
+ /* Create new elements for dst if they cannot be found
+ or substitute zero elements if src elements not found. */
+ selt = lbitset_elt_find (src, i, LBITSET_SUBST);
+ delt = lbitset_elt_find (dst, i, LBITSET_CREATE);
- index = elt->index;
- for (i = 0; i < index; i += LBITSET_ELT_WORDS)
- {
- /* Create new elements for dst if they cannot be found
- or substitute zero elements if src elements not found. */
- selt = lbitset_elt_find (dst, i, LBITSET_SUBST);
- delt = lbitset_elt_find (dst, i, LBITSET_CREATE);
+ for (j = 0; j < LBITSET_ELT_WORDS; j++)
+ delt->words[j] = ~selt->words[j];
+ }
+ lbitset_weed (dst);
+ return;
+}
- for (j = 0; j < LBITSET_ELT_WORDS; j++)
- delt->words[j] = ~selt->words[j];
- }
- lbitset_weed (dst);
- break;
- /* Return 1 if DST == SRC. */
- case BITSET_OP_EQUAL_P:
- return lbitset_equal_p (dst, src);
- break;
+/* Return 1 if DST == DST | SRC. */
+static int
+lbitset_subset_p (bitset dst, bitset src)
+{
+ lbitset_elt *selt;
+ lbitset_elt *delt;
+ unsigned int j;
- /* Return 1 if DST == DST | SRC. */
- case BITSET_OP_SUBSET_P:
- for (selt = LBITSET_HEAD (src), delt = LBITSET_HEAD (dst);
- selt || delt; selt = selt->next, delt = delt->next)
+ for (selt = LBITSET_HEAD (src), delt = LBITSET_HEAD (dst);
+ selt || delt; selt = selt->next, delt = delt->next)
+ {
+ if (!selt)
+ selt = &lbitset_zero_elts[0];
+ else if (!delt)
+ delt = &lbitset_zero_elts[0];
+ else if (selt->index != delt->index)
{
- if (!selt)
- selt = &lbitset_zero_elts[0];
- else if (!delt)
- delt = &lbitset_zero_elts[0];
- else if (selt->index != delt->index)
+ if (selt->index < delt->index)
{
- if (selt->index < delt->index)
- {
- lbitset_zero_elts[2].next = delt;
- delt = &lbitset_zero_elts[2];
- }
- else
- {
- lbitset_zero_elts[1].next = selt;
- selt = &lbitset_zero_elts[1];
- }
+ lbitset_zero_elts[2].next = delt;
+ delt = &lbitset_zero_elts[2];
+ }
+ else
+ {
+ lbitset_zero_elts[1].next = selt;
+ selt = &lbitset_zero_elts[1];
}
-
- for (j = 0; j < LBITSET_ELT_WORDS; j++)
- if (delt->words[j] != (selt->words[j] | delt->words[j]))
- return 0;
}
- break;
- /* Return 1 if DST & SRC == 0. */
- case BITSET_OP_DISJOINT_P:
- for (selt = LBITSET_HEAD (src), delt = LBITSET_HEAD (dst);
- selt && delt; selt = selt->next, delt = delt->next)
+ for (j = 0; j < LBITSET_ELT_WORDS; j++)
+ if (delt->words[j] != (selt->words[j] | delt->words[j]))
+ return 0;
+ }
+ return 1;
+}
+
+
+/* Return 1 if DST & SRC == 0. */
+static int
+lbitset_disjoint_p (bitset dst, bitset src)
+{
+ lbitset_elt *selt;
+ lbitset_elt *delt;
+ unsigned int j;
+
+ for (selt = LBITSET_HEAD (src), delt = LBITSET_HEAD (dst);
+ selt && delt; selt = selt->next, delt = delt->next)
+ {
+ if (selt->index != delt->index)
{
- if (selt->index != delt->index)
+ if (selt->index < delt->index)
{
- if (selt->index < delt->index)
- {
- lbitset_zero_elts[2].next = delt;
- delt = &lbitset_zero_elts[2];
- }
- else
- {
- lbitset_zero_elts[1].next = selt;
- selt = &lbitset_zero_elts[1];
- }
+ lbitset_zero_elts[2].next = delt;
+ delt = &lbitset_zero_elts[2];
}
-
- for (j = 0; j < LBITSET_ELT_WORDS; j++)
- if (selt->words[j] & delt->words[j])
- return 0;
+ else
+ {
+ lbitset_zero_elts[1].next = selt;
+ selt = &lbitset_zero_elts[1];
+ }
+ /* Since the elements are different, there is no
+ intersection of these elements. */
+ continue;
}
- break;
- default:
- abort ();
+ for (j = 0; j < LBITSET_ELT_WORDS; j++)
+ if (selt->words[j] & delt->words[j])
+ return 0;
}
-
return 1;
}
static int
-lbitset_op3 (dst, src1, src2, op)
- bitset dst;
- bitset src1;
- bitset src2;
- enum bitset_ops op;
+lbitset_op3_cmp (bitset dst, bitset src1, bitset src2, enum bitset_ops op)
{
lbitset_elt *selt1 = LBITSET_HEAD (src1);
lbitset_elt *selt2 = LBITSET_HEAD (src2);
lbitset_elt *delt = LBITSET_HEAD (dst);
- bitset_windex index1;
- bitset_windex index2;
- bitset_windex index;
+ bitset_windex windex1;
+ bitset_windex windex2;
+ bitset_windex windex;
lbitset_elt *stmp1;
lbitset_elt *stmp2;
lbitset_elt *dtmp;
int changed = 0;
unsigned int i;
- /* Fast track common, simple cases. */
- if (!selt2)
- {
- if (op == BITSET_OP_AND)
- {
- lbitset_weed (dst);
- changed = !LBITSET_HEAD (dst);
- lbitset_zero (dst);
- return changed;
- }
- else if (op == BITSET_OP_ANDN || op == BITSET_OP_OR
- || op == BITSET_OP_XOR)
- {
- return lbitset_copy_compare (dst, src1);
- }
- }
- else if (!selt1)
- {
- if (op == BITSET_OP_AND || op == BITSET_OP_ANDN)
- {
- lbitset_weed (dst);
- changed = !LBITSET_HEAD (dst);
- lbitset_zero (dst);
- return changed;
- }
- else if (op == BITSET_OP_OR || op == BITSET_OP_XOR)
- {
- return lbitset_copy_compare (dst, src2);
- }
- }
-
LBITSET_HEAD (dst) = 0;
dst->b.csize = 0;
- index1 = (selt1) ? selt1->index : BITSET_INDEX_MAX;
- index2 = (selt2) ? selt2->index : BITSET_INDEX_MAX;
+ windex1 = (selt1) ? selt1->index : BITSET_WINDEX_MAX;
+ windex2 = (selt2) ? selt2->index : BITSET_WINDEX_MAX;
while (selt1 || selt2)
{
/* Figure out whether we need to substitute zero elements for
missing links. */
- if (index1 == index2)
+ if (windex1 == windex2)
{
- index = index1;
+ windex = windex1;
stmp1 = selt1;
stmp2 = selt2;
selt1 = selt1->next;
- index1 = (selt1) ? selt1->index : BITSET_INDEX_MAX;
+ windex1 = (selt1) ? selt1->index : BITSET_WINDEX_MAX;
selt2 = selt2->next;
- index2 = (selt2) ? selt2->index : BITSET_INDEX_MAX;
+ windex2 = (selt2) ? selt2->index : BITSET_WINDEX_MAX;
}
- else if (index1 < index2)
+ else if (windex1 < windex2)
{
- index = index1;
+ windex = windex1;
stmp1 = selt1;
stmp2 = &lbitset_zero_elts[0];
selt1 = selt1->next;
- index1 = (selt1) ? selt1->index : BITSET_INDEX_MAX;
+ windex1 = (selt1) ? selt1->index : BITSET_WINDEX_MAX;
}
else
{
- index = index2;
+ windex = windex2;
stmp1 = &lbitset_zero_elts[0];
stmp2 = selt2;
selt2 = selt2->next;
- index2 = (selt2) ? selt2->index : BITSET_INDEX_MAX;
+ windex2 = (selt2) ? selt2->index : BITSET_WINDEX_MAX;
}
/* Find the appropriate element from DST. Begin by discarding
elements that we've skipped. */
- while (delt && delt->index < index)
+ while (delt && delt->index < windex)
{
changed = 1;
dtmp = delt;
delt = delt->next;
lbitset_elt_free (dtmp);
}
- if (delt && delt->index == index)
+ if (delt && delt->index == windex)
{
dtmp = delt;
delt = delt->next;
}
break;
- case BITSET_OP_ORN:
- for (i = 0; i < LBITSET_ELT_WORDS; i++, dstp++)
- {
- bitset_word tmp = *srcp1++ | ~(*srcp2++);
-
- if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
- }
- break;
-
default:
abort ();
}
if (!lbitset_elt_zero_p (dtmp))
{
- dtmp->index = index;
+ dtmp->index = windex;
/* Perhaps this could be optimised... */
lbitset_elt_link (dst, dtmp);
}
}
+static int
+lbitset_and_cmp (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_elt *selt1 = LBITSET_HEAD (src1);
+ lbitset_elt *selt2 = LBITSET_HEAD (src2);
+ int changed;
+
+ if (!selt2)
+ {
+ lbitset_weed (dst);
+ changed = !LBITSET_HEAD (dst);
+ lbitset_zero (dst);
+ return changed;
+ }
+ else if (!selt1)
+ {
+ lbitset_weed (dst);
+ changed = !LBITSET_HEAD (dst);
+ lbitset_zero (dst);
+ return changed;
+ }
+ return lbitset_op3_cmp (dst, src1, src2, BITSET_OP_AND);
+}
+
+
+static void
+lbitset_and (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_and_cmp (dst, src1, src2);
+}
+
+
+static int
+lbitset_andn_cmp (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_elt *selt1 = LBITSET_HEAD (src1);
+ lbitset_elt *selt2 = LBITSET_HEAD (src2);
+ int changed;
+
+ if (!selt2)
+ {
+ return lbitset_copy_cmp (dst, src1);
+ }
+ else if (!selt1)
+ {
+ lbitset_weed (dst);
+ changed = !LBITSET_HEAD (dst);
+ lbitset_zero (dst);
+ return changed;
+ }
+ return lbitset_op3_cmp (dst, src1, src2, BITSET_OP_ANDN);
+}
+
+
+static void
+lbitset_andn (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_andn_cmp (dst, src1, src2);
+}
+
+
+static int
+lbitset_or_cmp (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_elt *selt1 = LBITSET_HEAD (src1);
+ lbitset_elt *selt2 = LBITSET_HEAD (src2);
+
+ if (!selt2)
+ {
+ return lbitset_copy_cmp (dst, src1);
+ }
+ else if (!selt1)
+ {
+ return lbitset_copy_cmp (dst, src2);
+ }
+ return lbitset_op3_cmp (dst, src1, src2, BITSET_OP_OR);
+}
+
+
+static void
+lbitset_or (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_or_cmp (dst, src1, src2);
+}
+
+
+static int
+lbitset_xor_cmp (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_elt *selt1 = LBITSET_HEAD (src1);
+ lbitset_elt *selt2 = LBITSET_HEAD (src2);
+
+ if (!selt2)
+ {
+ return lbitset_copy_cmp (dst, src1);
+ }
+ else if (!selt1)
+ {
+ return lbitset_copy_cmp (dst, src2);
+ }
+ return lbitset_op3_cmp (dst, src1, src2, BITSET_OP_XOR);
+}
+
+
+static void
+lbitset_xor (bitset dst, bitset src1, bitset src2)
+{
+ lbitset_xor_cmp (dst, src1, src2);
+}
+
+
+
/* Vector of operations for linked-list bitsets. */
-struct bitset_ops_struct lbitset_ops = {
+struct bitset_vtable lbitset_vtable = {
lbitset_set,
lbitset_reset,
+ bitset_toggle_,
lbitset_test,
lbitset_size,
- lbitset_op1,
- lbitset_op2,
- lbitset_op3,
- bitset_op4,
+ bitset_count_,
+ lbitset_empty_p,
+ lbitset_ones,
+ lbitset_zero,
+ lbitset_copy,
+ lbitset_disjoint_p,
+ lbitset_equal_p,
+ lbitset_not,
+ lbitset_subset_p,
+ lbitset_and,
+ lbitset_and_cmp,
+ lbitset_andn,
+ lbitset_andn_cmp,
+ lbitset_or,
+ lbitset_or_cmp,
+ lbitset_xor,
+ lbitset_xor_cmp,
+ bitset_and_or_,
+ bitset_and_or_cmp_,
+ bitset_andn_or_,
+ bitset_andn_or_cmp_,
+ bitset_or_and_,
+ bitset_or_and_cmp_,
lbitset_list,
- lbitset_reverse_list,
+ lbitset_list_reverse,
lbitset_free,
BITSET_LIST
};
/* Return size of initial structure. */
-int
-lbitset_bytes (n_bits)
- bitset_bindex n_bits ATTRIBUTE_UNUSED;
+size_t
+lbitset_bytes (bitset_bindex n_bits ATTRIBUTE_UNUSED)
{
- return sizeof (struct bitset_struct);
+ return sizeof (struct lbitset_struct);
}
/* Initialize a bitset. */
-
bitset
-lbitset_init (bset, n_bits)
- bitset bset;
- bitset_bindex n_bits ATTRIBUTE_UNUSED;
+lbitset_init (bitset bset, bitset_bindex n_bits ATTRIBUTE_UNUSED)
{
- bset->b.ops = &lbitset_ops;
+ bset->b.vtable = &lbitset_vtable;
return bset;
}
void
-lbitset_release_memory ()
+lbitset_release_memory (void)
{
lbitset_free_list = 0;
if (lbitset_obstack_init)
obstack_free (&lbitset_obstack, NULL);
}
}
+
+
+/* Function to be called from debugger to debug lbitset. */
+void
+debug_lbitset (bitset bset)
+{
+ lbitset_elt *elt;
+ unsigned int i;
+
+ if (!bset)
+ return;
+
+ for (elt = LBITSET_HEAD (bset); elt; elt = elt->next)
+ {
+ fprintf (stderr, "Elt %lu\n", (unsigned long) elt->index);
+ for (i = 0; i < LBITSET_ELT_WORDS; i++)
+ {
+ unsigned int j;
+ bitset_word word;
+
+ word = elt->words[i];
+
+ fprintf (stderr, " Word %u:", i);
+ for (j = 0; j < LBITSET_WORD_BITS; j++)
+ if ((word & ((bitset_word) 1 << j)))
+ fprintf (stderr, " %u", j);
+ fprintf (stderr, "\n");
+ }
+ }
+}
projects / bison.git / blobdiff