/* Variable array bitsets.
- Copyright (C) 2002-2006, 2009-2010 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
static void vbitset_reset (bitset, bitset_bindex);
static bool vbitset_test (bitset, bitset_bindex);
static bitset_bindex vbitset_list (bitset, bitset_bindex *,
- bitset_bindex, bitset_bindex *);
+ bitset_bindex, bitset_bindex *);
static bitset_bindex vbitset_list_reverse (bitset, bitset_bindex *,
- bitset_bindex, bitset_bindex *);
+ bitset_bindex, bitset_bindex *);
#define VBITSET_N_WORDS(N) (((N) + BITSET_WORD_BITS - 1) / BITSET_WORD_BITS)
#define VBITSET_WORDS(X) ((X)->b.cdata)
bitset_windex size;
/* The bitset needs to grow. If we already have enough memory
- allocated, then just zero what we need. */
+ allocated, then just zero what we need. */
if (newsize > VBITSET_ASIZE (src))
- {
- /* We need to allocate more memory. When oldsize is
- non-zero this means that we are changing the size, so
- grow the bitset 25% larger than requested to reduce
- number of reallocations. */
-
- if (oldsize == 0)
- size = newsize;
- else
- size = newsize + newsize / 4;
-
- VBITSET_WORDS (src)
- = realloc (VBITSET_WORDS (src), size * sizeof (bitset_word));
- VBITSET_ASIZE (src) = size;
- }
+ {
+ /* We need to allocate more memory. When oldsize is
+ non-zero this means that we are changing the size, so
+ grow the bitset 25% larger than requested to reduce
+ number of reallocations. */
+
+ if (oldsize == 0)
+ size = newsize;
+ else
+ size = newsize + newsize / 4;
+
+ VBITSET_WORDS (src)
+ = realloc (VBITSET_WORDS (src), size * sizeof (bitset_word));
+ VBITSET_ASIZE (src) = size;
+ }
memset (VBITSET_WORDS (src) + oldsize, 0,
- (newsize - oldsize) * sizeof (bitset_word));
+ (newsize - oldsize) * sizeof (bitset_word));
VBITSET_SIZE (src) = newsize;
}
else
{
/* The bitset needs to shrink. There's no point deallocating
- the memory unless it is shrinking by a reasonable amount. */
+ the memory unless it is shrinking by a reasonable amount. */
if ((oldsize - newsize) >= oldsize / 2)
- {
- VBITSET_WORDS (src)
- = realloc (VBITSET_WORDS (src), newsize * sizeof (bitset_word));
- VBITSET_ASIZE (src) = newsize;
- }
+ {
+ VBITSET_WORDS (src)
+ = realloc (VBITSET_WORDS (src), newsize * sizeof (bitset_word));
+ VBITSET_ASIZE (src) = newsize;
+ }
/* Need to prune any excess bits. FIXME. */
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;
}
{
/* 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 >= BITSET_SIZE_ (src))
- return 0;
+ 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;
memcpy (dstp, srcp, sizeof (bitset_word) * ssize);
memset (dstp + sizeof (bitset_word) * ssize, 0,
- sizeof (bitset_word) * (dsize - ssize));
+ sizeof (bitset_word) * (dsize - ssize));
}
vbitset_unused_clear (dst);
memset (dstp + sizeof (bitset_word) * ssize, 0,
- sizeof (bitset_word) * (dsize - ssize));
+ sizeof (bitset_word) * (dsize - ssize));
}
for (i = 0; i < min (ssize, dsize); i++)
if (*srcp++ != *dstp++)
- return 0;
+ return 0;
if (ssize > dsize)
{
for (; i < ssize; i++)
- if (*srcp++)
- return 0;
+ if (*srcp++)
+ return 0;
}
else
{
for (; i < dsize; i++)
- if (*dstp++)
- return 0;
+ if (*dstp++)
+ return 0;
}
return 1;
for (i = 0; i < min (ssize, dsize); i++, dstp++, srcp++)
if (*dstp != (*srcp | *dstp))
- return 0;
+ return 0;
if (ssize > dsize)
{
for (; i < ssize; i++)
- if (*srcp++)
- return 0;
+ if (*srcp++)
+ return 0;
}
return 1;
for (i = 0; i < min (ssize, dsize); i++)
if (*srcp++ & *dstp++)
- return 0;
+ return 0;
return 1;
}
bitset_word tmp = *src1p++ & *src2p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
if (ssize2 > ssize1)
for (; i < ssize1; i++, dstp++)
{
if (*dstp != 0)
- {
- changed = 1;
- *dstp = 0;
- }
+ {
+ changed = 1;
+ *dstp = 0;
+ }
}
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize1));
if (ssize2 > ssize1)
{
for (; i < ssize2; i++)
- *dstp++ = 0;
+ *dstp++ = 0;
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize2));
}
else
{
for (; i < ssize1; i++)
- *dstp++ = *src1p++;
+ *dstp++ = *src1p++;
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize1));
}
bitset_word tmp = *src1p++ & ~(*src2p++);
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
if (ssize2 > ssize1)
{
for (; i < ssize2; i++, dstp++)
- {
- if (*dstp != 0)
- {
- changed = 1;
- *dstp = 0;
- }
- }
+ {
+ if (*dstp != 0)
+ {
+ changed = 1;
+ *dstp = 0;
+ }
+ }
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize2));
}
else
{
for (; i < ssize1; i++, dstp++)
- {
- bitset_word tmp = *src1p++;
+ {
+ bitset_word tmp = *src1p++;
- if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
- }
+ if (*dstp != tmp)
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
+ }
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize1));
}
bitset_word tmp = *src1p++ | *src2p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
if (ssize2 > ssize1)
bitset_word tmp = *src1p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize1));
bitset_word tmp = *src1p++ ^ *src2p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
if (ssize2 > ssize1)
bitset_word tmp = *src1p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
memset (dstp, 0, sizeof (bitset_word) * (dsize - ssize1));
bitset_word tmp = (*src1p++ & *src2p++) | *src3p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
return changed;
}
bitset_word tmp = (*src1p++ & ~(*src2p++)) | *src3p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
return changed;
}
bitset_word tmp = (*src1p++ | *src2p++) & *src3p++;
if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
+ {
+ changed = 1;
+ *dstp = tmp;
+ }
}
return changed;
}
projects / bison.git / blobdiff