/* Generic bitsets.
- Copyright (C) 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003 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
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef _BITSET_H
-#define _BITSET_H
+#define _BITSET_H
/* This file is the public interface to the bitset abstract data type.
Only use the functions and macros defined in this file. */
#include "bbitset.h"
+
+/* obstack.h tries to be portable to K&R compilers, but its
+ __INT_TO_PTR macro generates diagnostics on compilers like Tru64 cc
+ that define __STDC__ to 0 when not in strict ANSI mode. The bitset
+ code assumes C89 or later, so it can avoid these glitches by
+ defining __INT_TO_PTR appropriately for C89 or later. */
+#ifndef __INT_TO_PTR
+# define __INT_TO_PTR(P) ((void *) ((P) + (char *) 0))
+#endif
#include "obstack.h"
+
#include <stdio.h>
/* Attributes used to select a bitset implementation. */
BITSET_DENSE = 4, /* Bitset dense. */
BITSET_SPARSE = 8, /* Bitset sparse. */
BITSET_FRUGAL = 16, /* Prefer most compact. */
- BITSET_GREEDY = 32}; /* Prefer fastest. */
+ BITSET_GREEDY = 32}; /* Prefer fastest at memory expense. */
typedef unsigned int bitset_attrs;
-/* The contents of the structure should be considered to be private.
- While I would like to make this structure opaque, it needs to be
- visible for the inline bit set/test functions. */
-struct bitset_struct
+/* The contents of the union should be considered to be private.
+ While I would like to make this union opaque, it needs to be
+ visible for the inline bit set/test functions, and for delegation
+ to the proper implementation. */
+union bitset_union
{
- struct bbitset_struct b;
+ /* This must be the first member of every other structure that is a
+ member of this union. */
+ struct bbitset_struct b; /* Base bitset data. */
+
+ struct abitset_struct
+ {
+ struct bbitset_struct b;
+ bitset_word words[1]; /* The array of bits. */
+ } a;
+
+ struct ebitset_struct
+ {
+ struct bbitset_struct b;
+ bitset_windex size; /* Number of elements. */
+ struct ebitset_elt_struct **elts; /* Expanding array of ptrs to elts. */
+ } e;
+
+ struct lbitset_struct
+ {
+ struct bbitset_struct b;
+ struct lbitset_elt_struct *head; /* First element in linked list. */
+ struct lbitset_elt_struct *tail; /* Last element in linked list. */
+ } l;
+
+ struct bitset_stats_struct
+ {
+ struct bbitset_struct b;
+ bitset bset;
+ } s;
+
+ struct vbitset_struct
+ {
+ struct bbitset_struct b;
+ bitset_windex size; /* Allocated size of array. */
+ } v;
+
};
{
bitset_bindex list[BITSET_LIST_SIZE];
bitset_bindex next;
- int num;
- int i;
+ bitset_bindex num;
+ bitset_bindex i;
} bitset_iterator;
/* Return bytes required for bitset of desired type and size. */
-extern int bitset_bytes PARAMS ((enum bitset_type, bitset_bindex));
+extern size_t bitset_bytes PARAMS ((enum bitset_type, bitset_bindex));
/* Initialise a bitset with desired type and size. */
extern bitset bitset_init PARAMS ((bitset, bitset_bindex, enum bitset_type));
/* Create a bitset of desired size and attributes. The bitset is zeroed. */
extern bitset bitset_create PARAMS ((bitset_bindex, bitset_attrs));
-/* Return size in bits of bitset SRC. */
-extern int bitset_size PARAMS ((bitset));
-
-/* Return number of bits set in bitset SRC. */
-extern int bitset_count PARAMS ((bitset));
-
/* Return bitset type. */
extern enum bitset_type bitset_type_get PARAMS ((bitset));
-#if BITSET_INLINE
-static inline void bitset_set PARAMS ((bitset, bitset_bindex));
-static inline void bitset_reset PARAMS ((bitset, bitset_bindex));
-static inline int bitset_test PARAMS ((bitset, bitset_bindex));
+/* Return bitset type name. */
+extern const char *bitset_type_name_get PARAMS ((bitset));
+
/* Set bit BITNO in bitset BSET. */
-static inline void bitset_set (bset, bitno)
- bitset bset;
- bitset_bindex bitno;
+static inline void
+bitset_set (bitset bset, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->b.cindex;
-
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
+ bitset_windex offset = windex - bset->b.cindex;
+
if (offset < bset->b.csize)
bset->b.cdata[offset] |= ((bitset_word) 1 << (bitno % BITSET_WORD_BITS));
else
/* Reset bit BITNO in bitset BSET. */
-static inline void bitset_reset (bset, bitno)
- bitset bset;
- bitset_bindex bitno;
+static inline void
+bitset_reset (bitset bset, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->b.cindex;
-
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
+ bitset_windex offset = windex - bset->b.cindex;
+
if (offset < bset->b.csize)
bset->b.cdata[offset] &= ~((bitset_word) 1 << (bitno % BITSET_WORD_BITS));
else
/* Test bit BITNO in bitset BSET. */
-static inline int bitset_test (bset, bitno)
- bitset bset;
- bitset_bindex bitno;
+static inline bool
+bitset_test (bitset bset, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->b.cindex;
-
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
+ bitset_windex offset = windex - bset->b.cindex;
+
if (offset < bset->b.csize)
return (bset->b.cdata[offset] >> (bitno % BITSET_WORD_BITS)) & 1;
else
return BITSET_TEST_ (bset, bitno);
}
-#endif
-#if ! BITSET_INLINE
-/* Set bit BITNO in bitset BSET. */
-#define bitset_set(bset, bitno) \
-do \
-{ \
- bitset_bindex _bitno = (bitno); \
- bitset_windex _index = _bitno / BITSET_WORD_BITS; \
- bitset_windex _offset = _index - (bset)->b.cindex; \
- \
- if (_offset < (bset)->b.csize) \
- (bset)->b.cdata[_offset] |= \
- ((bitset_word) 1 << (_bitno % BITSET_WORD_BITS)); \
- else \
- BITSET_SET_ ((bset), _bitno); \
-} while (0)
+/* Toggle bit BITNO in bitset BSET and return non-zero if now set. */
+#define bitset_toggle(bset, bitno) BITSET_TOGGLE_ (bset, bitno)
+/* Return size in bits of bitset SRC. */
+#define bitset_size(SRC) BITSET_SIZE_ (SRC)
-/* Reset bit BITNO in bitset BSET. */
-#define bitset_reset(bset, bitno) \
-do \
-{ \
- bitset_bindex _bitno = (bitno); \
- bitset_windex _index = _bitno / BITSET_WORD_BITS; \
- bitset_windex _offset = _index - (bset)->b.cindex; \
- \
- if (_offset < (bset)->b.csize) \
- (bset)->b.cdata[_offset] &= \
- ~((bitset_word) 1 << (_bitno % BITSET_WORD_BITS)); \
- else \
- BITSET_RESET_ ((bset), _bitno); \
-} while (0)
+/* Change size of bitset. */
+extern void bitset_resize PARAMS ((bitset, bitset_bindex));
+/* Return number of bits set in bitset SRC. */
+#define bitset_count(SRC) BITSET_COUNT_ (SRC)
-/* Test bit BITNO in bitset BSET. */
-#define bitset_test(bset, bitno) \
-(((((bitno) / BITSET_WORD_BITS) - (bset)->b.cindex) < (bset)->b.csize) \
- ? (((int) \
- ((bset)->b.cdata[(((bitno) / BITSET_WORD_BITS) - (bset)->b.cindex)] \
- >> ((bitno) % BITSET_WORD_BITS))) \
- & 1) \
- : BITSET_TEST_ ((bset), (bitno)))
-#endif
+/* Return SRC == 0. */
+#define bitset_empty_p(SRC) BITSET_EMPTY_P_ (SRC)
-/* Toggle bit BITNO in bitset BSET and return non-zero if now set. */
-extern int bitset_toggle PARAMS ((bitset, bitset_bindex));
+/* DST = ~0. */
+#define bitset_ones(DST) BITSET_ONES_ (DST)
/* DST = 0. */
-extern int bitset_zero PARAMS ((bitset));
+#define bitset_zero(DST) BITSET_ZERO_ (DST)
-/* DST = ~0. */
-extern int bitset_ones PARAMS ((bitset));
-/* Return non-zero if all bits in bitset SRC are reset. */
-extern int bitset_empty_p PARAMS ((bitset));
-/* Return DST == DST | SRC. */
-extern int bitset_subset_p PARAMS ((bitset, bitset));
-
-/* Return DST == SRC. */
-extern int bitset_equal_p PARAMS ((bitset, bitset));
+/* DST = SRC. */
+#define bitset_copy(DST, SRC) BITSET_COPY_ (DST, SRC)
/* Return DST & SRC == 0. */
-extern int bitset_disjoint_p PARAMS ((bitset, bitset));
+#define bitset_disjoint_p(DST, SRC) BITSET_DISJOINT_P_ (DST, SRC)
-/* DST == SRC. */
-extern int bitset_copy PARAMS ((bitset, bitset));
+/* Return DST == SRC. */
+#define bitset_equal_p(DST, SRC) BITSET_EQUAL_P_ (DST, SRC)
/* DST = ~SRC. */
-extern int bitset_not PARAMS ((bitset, bitset));
+#define bitset_not(DST, SRC) BITSET_NOT_ (DST, SRC)
-/* DST = SRC1 | SRC2. Return non-zero if DST != SRC1 | SRC2. */
-extern int bitset_or PARAMS ((bitset, bitset, bitset));
+/* Return DST == DST | SRC. */
+#define bitset_subset_p(DST, SRC) BITSET_SUBSET_P_ (DST, SRC)
+
+
+
+/* DST = SRC1 & SRC2. */
+#define bitset_and(DST, SRC1, SRC2) BITSET_AND_ (DST, SRC1, SRC2)
/* DST = SRC1 & SRC2. Return non-zero if DST != SRC1 & SRC2. */
-extern int bitset_and PARAMS ((bitset, bitset, bitset));
+#define bitset_and_cmp(DST, SRC1, SRC2) BITSET_AND_CMP_ (DST, SRC1, SRC2)
-/* DST = SRC1 ^ SRC2. Return non-zero if DST != SRC1 ^ SRC2. */
-extern int bitset_xor PARAMS ((bitset, bitset, bitset));
+/* DST = SRC1 & ~SRC2. */
+#define bitset_andn(DST, SRC1, SRC2) BITSET_ANDN_ (DST, SRC1, SRC2)
/* DST = SRC1 & ~SRC2. Return non-zero if DST != SRC1 & ~SRC2. */
-extern int bitset_andn PARAMS ((bitset, bitset, bitset));
+#define bitset_andn_cmp(DST, SRC1, SRC2) BITSET_ANDN_CMP_ (DST, SRC1, SRC2)
-/* DST = (SRC1 | SRC2) & SRC3. Return non-zero if
- DST != (SRC1 | SRC2) & SRC3. */
-extern int bitset_or_and PARAMS ((bitset, bitset, bitset, bitset));
+/* DST = SRC1 | SRC2. */
+#define bitset_or(DST, SRC1, SRC2) BITSET_OR_ (DST, SRC1, SRC2)
+
+/* DST = SRC1 | SRC2. Return non-zero if DST != SRC1 | SRC2. */
+#define bitset_or_cmp(DST, SRC1, SRC2) BITSET_OR_CMP_ (DST, SRC1, SRC2)
+
+/* DST = SRC1 ^ SRC2. */
+#define bitset_xor(DST, SRC1, SRC2) BITSET_XOR_ (DST, SRC1, SRC2)
+
+/* DST = SRC1 ^ SRC2. Return non-zero if DST != SRC1 ^ SRC2. */
+#define bitset_xor_cmp(DST, SRC1, SRC2) BITSET_XOR_CMP_ (DST, SRC1, SRC2)
+
+
+
+/* DST = (SRC1 & SRC2) | SRC3. */
+#define bitset_and_or(DST, SRC1, SRC2, SRC3) \
+ BITSET_AND_OR_ (DST, SRC1, SRC2, SRC3)
/* DST = (SRC1 & SRC2) | SRC3. Return non-zero if
DST != (SRC1 & SRC2) | SRC3. */
-extern int bitset_and_or PARAMS ((bitset, bitset, bitset, bitset));
+#define bitset_and_or_cmp(DST, SRC1, SRC2, SRC3) \
+ BITSET_AND_OR_CMP_ (DST, SRC1, SRC2, SRC3)
+
+/* DST = (SRC1 & ~SRC2) | SRC3. */
+#define bitset_andn_or(DST, SRC1, SRC2, SRC3) \
+ BITSET_ANDN_OR_ (DST, SRC1, SRC2, SRC3)
/* DST = (SRC1 & ~SRC2) | SRC3. Return non-zero if
DST != (SRC1 & ~SRC2) | SRC3. */
-extern int bitset_andn_or PARAMS ((bitset, bitset, bitset, bitset));
+#define bitset_andn_or_cmp(DST, SRC1, SRC2, SRC3) \
+ BITSET_ANDN_OR_CMP_ (DST, SRC1, SRC2, SRC3)
-/* Find next bit set in BSET starting from and including BITNO. */
-extern int bitset_next PARAMS ((bitset, bitset_bindex));
+/* DST = (SRC1 | SRC2) & SRC3. */
+#define bitset_or_and(DST, SRC1, SRC2, SRC3)\
+ BITSET_OR_AND_ (DST, SRC1, SRC2, SRC3)
-/* Find previous bit set in BSET starting from and including BITNO. */
-extern int bitset_prev PARAMS ((bitset, bitset_bindex));
-
-/* Return non-zero if BITNO in SRC is the only set bit. */
-extern int bitset_only_set_p PARAMS ((bitset, bitset_bindex));
+/* DST = (SRC1 | SRC2) & SRC3. Return non-zero if
+ DST != (SRC1 | SRC2) & SRC3. */
+#define bitset_or_and_cmp(DST, SRC1, SRC2, SRC3)\
+ BITSET_OR_AND_CMP_ (DST, SRC1, SRC2, SRC3)
-/* Find list of up to NUM bits set in BSET starting from and including
+/* Find list of up to NUM bits set in BSET starting from and including
*NEXT. Return with actual number of bits found and with *NEXT
indicating where search stopped. */
#define bitset_list(BSET, LIST, NUM, NEXT) \
-BITSET_LIST_ (BSET, LIST, NUM, NEXT)
+ BITSET_LIST_ (BSET, LIST, NUM, NEXT)
/* Find reverse list of up to NUM bits set in BSET starting from and
including NEXT. Return with actual number of bits found and with
*NEXT indicating where search stopped. */
-#define bitset_reverse_list(BSET, LIST, NUM, NEXT) \
-BITSET_REVERSE_LIST_ (BSET, LIST, NUM, NEXT)
+#define bitset_list_reverse(BSET, LIST, NUM, NEXT) \
+ BITSET_LIST_REVERSE_ (BSET, LIST, NUM, NEXT)
+
+/* Return true if both bitsets are of the same type and size. */
+extern bool bitset_compatible_p (bitset bset1, bitset bset2);
+
+/* Find next set bit from the given bit index. */
+extern bitset_bindex bitset_next PARAMS ((bitset, bitset_bindex));
+
+/* Find previous set bit from the given bit index. */
+extern bitset_bindex bitset_prev PARAMS ((bitset, bitset_bindex));
/* Find first set bit. */
-extern int bitset_first PARAMS ((bitset));
+extern bitset_bindex bitset_first PARAMS ((bitset));
/* Find last set bit. */
-extern int bitset_last PARAMS ((bitset));
+extern bitset_bindex bitset_last PARAMS ((bitset));
+
+/* Return nonzero if this is the only set bit. */
+extern bool bitset_only_set_p PARAMS ((bitset, bitset_bindex));
/* Dump bitset. */
extern void bitset_dump PARAMS ((FILE *, bitset));
-/* Loop over all elements of BSET, starting with MIN, setting BIT
- to the index of each set bit. */
-#define BITSET_FOR_EACH(ITER, BSET, BIT, MIN) \
+/* Loop over all elements of BSET, starting with MIN, setting INDEX
+ to the index of each set bit. For example, the following will print
+ the bits set in a bitset:
+
+ bitset_bindex i;
+ bitset_iterator iter;
+
+ BITSET_FOR_EACH (iter, src, i, 0)
+ {
+ printf ("%lu ", (unsigned long int) i);
+ };
+*/
+#define BITSET_FOR_EACH(ITER, BSET, INDEX, MIN) \
for (ITER.next = (MIN), ITER.num = BITSET_LIST_SIZE; \
(ITER.num == BITSET_LIST_SIZE) \
&& (ITER.num = bitset_list (BSET, ITER.list, \
- BITSET_LIST_SIZE, &ITER.next));) \
- for (ITER.i = 0; (BIT) = ITER.list[ITER.i], ITER.i < ITER.num; ITER.i++)
+ BITSET_LIST_SIZE, &ITER.next));) \
+ for (ITER.i = 0; \
+ ITER.i < ITER.num && ((INDEX) = ITER.list[ITER.i], 1); \
+ ITER.i++)
/* Loop over all elements of BSET, in reverse order starting with
- MIN, setting BIT to the index of each set bit. */
-#define BITSET_FOR_EACH_REVERSE(ITER, BSET, BIT, MIN) \
+ MIN, setting INDEX to the index of each set bit. For example, the
+ following will print the bits set in a bitset in reverse order:
+
+ bitset_bindex i;
+ bitset_iterator iter;
+
+ BITSET_FOR_EACH_REVERSE (iter, src, i, 0)
+ {
+ printf ("%lu ", (unsigned long int) i);
+ };
+*/
+#define BITSET_FOR_EACH_REVERSE(ITER, BSET, INDEX, MIN) \
for (ITER.next = (MIN), ITER.num = BITSET_LIST_SIZE; \
(ITER.num == BITSET_LIST_SIZE) \
&& (ITER.num = bitset_list_reverse (BSET, ITER.list, \
- BITSET_LIST_SIZE, &ITER.next));) \
- for (ITER.i = 0; (BIT) = ITER.list[ITER.i], ITER.i < ITER.num; ITER.i++)
+ BITSET_LIST_SIZE, &ITER.next));) \
+ for (ITER.i = 0; \
+ ITER.i < ITER.num && ((INDEX) = ITER.list[ITER.i], 1); \
+ ITER.i++)
/* Define set operations in terms of logical operations. */
-#define bitset_diff(DST, SRC1, SRC2) bitset_andn (DST, SRC1, SRC2)
+#define bitset_diff(DST, SRC1, SRC2) bitset_andn (DST, SRC1, SRC2)
+#define bitset_diff_cmp(DST, SRC1, SRC2) bitset_andn_cmp (DST, SRC1, SRC2)
+
+#define bitset_intersection(DST, SRC1, SRC2) bitset_and (DST, SRC1, SRC2)
+#define bitset_intersection_cmp(DST, SRC1, SRC2) bitset_and_cmp (DST, SRC1, SRC2)
-#define bitset_intersection(DST, SRC1, SRC2) bitset_and (DST, SRC1, SRC2)
+#define bitset_union(DST, SRC1, SRC2) bitset_or (DST, SRC1, SRC2)
+#define bitset_union_cmp(DST, SRC1, SRC2) bitset_or_cmp (DST, SRC1, SRC2)
-#define bitset_union(DST, SRC1, SRC2) bitset_or (DST, SRC1, SRC2)
+/* Symmetrical difference. */
+#define bitset_symdiff(DST, SRC1, SRC2) bitset_xor (DST, SRC1, SRC2)
+#define bitset_symdiff_cmp(DST, SRC1, SRC2) bitset_xor_cmp (DST, SRC1, SRC2)
+/* Union of difference. */
#define bitset_diff_union(DST, SRC1, SRC2, SRC3) \
- bitset_andn_or (DST, SRC1, SRC2, SRC3)
+ bitset_andn_or (DST, SRC1, SRC2, SRC3)
+#define bitset_diff_union_cmp(DST, SRC1, SRC2, SRC3) \
+ bitset_andn_or_cmp (DST, SRC1, SRC2, SRC3)
/* Release any memory tied up with bitsets. */
projects / bison.git / blobdiff