#ifndef _BITSET_H
#define _BITSET_H
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+/* This file is the public interface to the bitset abstract data type.
+ Only use the functions and macros defined in this file. */
-#define BITSET_STATS 1
-
-# ifndef PARAMS
-# if defined PROTOTYPES || (defined __STDC__ && __STDC__)
-# define PARAMS(Args) Args
-# else
-# define PARAMS(Args) ()
-# endif
-# endif
-
-# ifndef __attribute__
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
-# define __attribute__(x)
-# endif
-# endif
-
-# ifndef ATTRIBUTE_NORETURN
-# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-# endif
-
-# ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-# endif
-
-#include "bitset-int.h"
-#include "sbitset.h"
-#include "lbitset.h"
-#include "ebitset.h"
+#include "bbitset.h"
#include "obstack.h"
#include <stdio.h>
-#include "xalloc.h"
+/* Attributes used to select a bitset implementation. */
enum bitset_attr {BITSET_FIXED = 1, /* Bitset size fixed. */
BITSET_VARIABLE = 2, /* Bitset size variable. */
BITSET_DENSE = 4, /* Bitset dense. */
typedef unsigned int bitset_attrs;
-/* The elements of these structures should be considered
- to be private. */
-typedef struct bitset_struct
-{
- struct bitset_ops_struct *ops;
- bitset_windex cindex; /* Cache word index. */
- bitset_windex csize; /* Cache size in words. */
- bitset_word *cdata; /* Cache data pointer. */
- union bitset_data
- {
- struct sbitset_struct s;
- struct lbitset_struct l;
- struct ebitset_struct e;
- } u;
-} *bitset;
-
-
-/* The contents of this structure should be considered private. */
-struct bitset_ops_struct
+/* 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
{
- void (*set) PARAMS ((struct bitset_struct *, bitset_bindex));
- void (*reset) PARAMS ((struct bitset_struct *, bitset_bindex));
- int (*test) PARAMS ((struct bitset_struct *, bitset_bindex));
- int (*size) PARAMS ((struct bitset_struct *));
- int (*op1) PARAMS ((struct bitset_struct *, enum bitset_ops));
- int (*op2) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- enum bitset_ops));
- int (*op3) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, enum bitset_ops));
- int (*op4) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *,
- enum bitset_ops));
- int (*list) PARAMS ((struct bitset_struct *, bitset_bindex *,
- bitset_bindex, bitset_bindex *));
- int (*reverse_list) PARAMS ((struct bitset_struct *, bitset_bindex *,
- bitset_bindex, bitset_bindex *));
- void (*free) PARAMS ((struct bitset_struct *));
- enum bitset_type type;
+ struct bbitset_struct b;
};
-
/* Return bytes required for bitset of desired type and size. */
extern int 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));
+/* Select an implementation type based on the desired bitset size
+ and attributes. */
extern enum bitset_type bitset_type_choose PARAMS ((bitset_bindex,
bitset_attrs));
-/* Create a bitset of desired type and size. */
+/* Create a bitset of desired type and size. The bitset is zeroed. */
extern bitset bitset_alloc PARAMS ((bitset_bindex, enum bitset_type));
/* Free bitset. */
extern void bitset_free PARAMS ((bitset));
-/* Create a bitset of desired type and size using obstack. */
+/* Create a bitset of desired type and size using an obstack. The
+ bitset is zeroed. */
extern bitset bitset_obstack_alloc PARAMS ((struct obstack *bobstack,
bitset_bindex, enum bitset_type));
/* Free bitset allocated on obstack. */
extern void bitset_obstack_free PARAMS ((bitset));
-/* Create a bitset of desired size and attributes. */
+/* 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));
+
#if BITSET_CACHE && BITSET_INLINE
static inline void bitset_set PARAMS ((bitset, bitset_bindex));
static inline void bitset_reset PARAMS ((bitset, bitset_bindex));
bitset_bindex bitno;
{
bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->cindex;
+ bitset_windex offset = index - bset->b.cindex;
- if (offset < bset->csize)
- bset->cdata[offset] |= (1 << (bitno % BITSET_WORD_BITS));
+ if (offset < bset->b.csize)
+ bset->b.cdata[offset] |= (1 << (bitno % BITSET_WORD_BITS));
else
- BITSET__SET (bset, bitno);
+ BITSET_SET_ (bset, bitno);
}
bitset_bindex bitno;
{
bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->cindex;
+ bitset_windex offset = index - bset->b.cindex;
- if (offset < bset->csize)
- bset->cdata[offset] &= ~(1 << (bitno % BITSET_WORD_BITS));
+ if (offset < bset->b.csize)
+ bset->b.cdata[offset] &= ~(1 << (bitno % BITSET_WORD_BITS));
else
- BITSET__RESET (bset, bitno);
+ BITSET_RESET_ (bset, bitno);
}
bitset_bindex bitno;
{
bitset_windex index = bitno / BITSET_WORD_BITS;
- bitset_windex offset = index - bset->cindex;
+ bitset_windex offset = index - bset->b.cindex;
- if (offset < bset->csize)
- return (bset->cdata[offset] >> (bitno % BITSET_WORD_BITS)) & 1;
+ if (offset < bset->b.csize)
+ return (bset->b.cdata[offset] >> (bitno % BITSET_WORD_BITS)) & 1;
else
- return BITSET__TEST (bset, bitno);
+ return BITSET_TEST_ (bset, bitno);
}
#endif
{ \
bitset_bindex _bitno = (bitno); \
bitset_windex _index = _bitno / BITSET_WORD_BITS; \
- bitset_windex _offset = _index - (bset)->cindex; \
+ bitset_windex _offset = _index - (bset)->b.cindex; \
\
- if (_offset < (bset)->csize) \
- (bset)->cdata[_offset] |= (1 << (_bitno % BITSET_WORD_BITS)); \
+ if (_offset < (bset)->b.csize) \
+ (bset)->b.cdata[_offset] |= (1 << (_bitno % BITSET_WORD_BITS)); \
else \
- BITSET__SET ((bset), _bitno); \
+ BITSET_SET_ ((bset), _bitno); \
} while (0)
{ \
bitset_bindex _bitno = (bitno); \
bitset_windex _index = _bitno / BITSET_WORD_BITS; \
- bitset_windex _offset = _index - (bset)->cindex; \
+ bitset_windex _offset = _index - (bset)->b.cindex; \
\
- if (_offset < (bset)->csize) \
- (bset)->cdata[_offset] &= ~(1 << (_bitno % BITSET_WORD_BITS)); \
+ if (_offset < (bset)->b.csize) \
+ (bset)->b.cdata[_offset] &= ~(1 << (_bitno % BITSET_WORD_BITS)); \
else \
- BITSET__RESET ((bset), _bitno); \
+ BITSET_RESET_ ((bset), _bitno); \
} while (0)
/* Test bit BITNO in bitset BSET. */
#define bitset_test(bset, bitno) \
-(((((bitno) / BITSET_WORD_BITS) - (bset)->cindex) < (bset)->csize) \
- ? ((bset)->cdata[(((bitno) / BITSET_WORD_BITS) - (bset)->cindex)] \
+(((((bitno) / BITSET_WORD_BITS) - (bset)->b.cindex) < (bset)->b.csize) \
+ ? ((bset)->b.cdata[(((bitno) / BITSET_WORD_BITS) - (bset)->b.cindex)] \
>> ((bitno) % BITSET_WORD_BITS)) & 1 \
- : (unsigned int) BITSET__TEST ((bset), (bitno)))
+ : (unsigned int) BITSET_TEST_ ((bset), (bitno)))
#endif
#if ! BITSET_CACHE
/* Set bit BITNO in bitset SRC. */
-#define bitset_set(SRC, BITNO) BITSET__SET (SRC, BITNO)
+#define bitset_set(SRC, BITNO) BITSET_SET_ (SRC, BITNO)
/* Reset bit BITNO in bitset SRC. */
-#define bitset_reset(SRC, BITNO) BITSET__RESET (SRC, BITNO)
+#define bitset_reset(SRC, BITNO) BITSET_RESET_ (SRC, BITNO)
/* Return non-zero if bit BITNO in bitset SRC is set. */
-#define bitset_test(SRC, BITNO) BITSET__TEST (SRC, BITNO)
+#define bitset_test(SRC, BITNO) BITSET_TEST_ (SRC, BITNO)
#endif
+/* Toggle bit BITNO in bitset BSET and return non-zero if now set. */
+extern int bitset_toggle PARAMS ((bitset, bitset_bindex));
+
/* DST = 0. */
extern int bitset_zero PARAMS ((bitset));
/* Return DST == SRC. */
extern int bitset_equal_p PARAMS ((bitset, bitset));
+/* Return DST & SRC == 0. */
+extern int bitset_disjoint_p PARAMS ((bitset, bitset));
+
/* DST == SRC. */
extern int bitset_copy PARAMS ((bitset, bitset));
/* DST = SRC1 & ~SRC2. Return non-zero if DST != SRC1 & ~SRC2. */
extern int bitset_andn PARAMS ((bitset, bitset, bitset));
-/* DST = SRC1 | ~SRC2. Return non-zero if DST != SRC1 | ~SRC2. */
-extern int bitset_orn PARAMS ((bitset, bitset, bitset));
-
/* 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) | SRC3. Return non-zero if
DST != (SRC1 & ~SRC2) | SRC3. */
-#define bitset_andn_or(DST, SRC1, SRC2, SRC3) \
+extern int bitset_andn_or PARAMS ((bitset, bitset, bitset, bitset));
/* Find next bit set in BSET starting from and including BITNO. */
extern int bitset_next PARAMS ((bitset, bitset_bindex));
/* 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));
+
/* 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. */
bitset_bindex *));
#else
#define bitset_list(BSET, LIST, NUM, NEXT) \
-BITSET__LIST (BSET, LIST, NUM, NEXT)
+BITSET_LIST_ (BSET, LIST, NUM, NEXT)
#endif
/* 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)
+BITSET_REVERSE_LIST_ (BSET, LIST, NUM, NEXT)
/* Find first set bit. */
extern int bitset_first PARAMS ((bitset));
} while (0)
-/* Define set operations in terms of bit operations. */
+/* Define set operations in terms of logical operations. */
#define bitset_diff(DST, SRC1, SRC2) bitset_andn (DST, SRC1, SRC2)
#define bitset_union(DST, SRC1, SRC2) bitset_or (DST, SRC1, SRC2)
#define bitset_diff_union(DST, SRC1, SRC2, SRC3) \
-bitset_andn_or (DST, SRC1, SRC2, SRC3)
+ bitset_andn_or (DST, SRC1, SRC2, SRC3)
+
/* Release any memory tied up with bitsets. */
extern void bitset_release_memory PARAMS ((void));
/* Function to debug bitset stats from debugger. */
extern void debug_bitset_stats PARAMS ((void));
-extern bitset sbitset_init PARAMS ((bitset, bitset_bindex));
-
-extern bitset lbitset_init PARAMS ((bitset, bitset_bindex));
-
-extern bitset ebitset_init PARAMS ((bitset, bitset_bindex));
-
#endif /* _BITSET_H */
projects / bison.git / blobdiff