/* Base bitset stuff.
- Copyright (C) 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004 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
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _BBITSET_H
#define _BBITSET_H
#include "libiberty.h"
-#ifdef HAVE_LIMITS_H
+#include <stdbool.h>
#include <limits.h>
-#endif
+#include <stddef.h>
-/* Currently we support three flavours of bitsets:
+/* Currently we support five flavours of bitsets:
BITSET_ARRAY: Array of bits (fixed size, fast for dense bitsets).
- BITSET_LIST: Linked list of array of bits (variable size, least storage
- for large very sparse sets).
- BITSET_TABLE: Expandable table of pointers to array of bits
- (variable size, less storage for large sparse sets).
-
- BITSET_STATS: Wrapper bitset for internal use only.
+ Memory for bit array and bitset structure allocated
+ contiguously.
+ BITSET_LIST: Linked list of arrays of bits (variable size, least storage
+ for large very sparse sets).
+ BITSET_TABLE: Expandable table of pointers to arrays of bits
+ (variable size, less storage for large sparse sets).
+ Faster than BITSET_LIST for random access.
+ BITSET_VARRAY: Variable array of bits (variable size, fast for
+ dense bitsets).
+ BITSET_STATS: Wrapper bitset for internal use only. Used for gathering
+ statistics and/or better run-time checking.
*/
-enum bitset_type {BITSET_ARRAY, BITSET_LIST, BITSET_TABLE, BITSET_TYPE_NUM,
- BITSET_STATS};
-#define BITSET_TYPE_NAMES {"abitset", "lbitset", "ebitset"}
+enum bitset_type {BITSET_ARRAY, BITSET_LIST, BITSET_TABLE, BITSET_VARRAY,
+ BITSET_TYPE_NUM, BITSET_STATS};
+#define BITSET_TYPE_NAMES {"abitset", "lbitset", "ebitset", "vbitset"}
extern const char * const bitset_type_names[];
enum bitset_alloc_type {BITSET_MALLOC, BITSET_OBALLOC};
-/* Non-zero to use inline functions instead of macros. */
-#define BITSET_INLINE 0
-
/* Data type used to store a word of bits. */
-typedef unsigned long bitset_word;
-#define BITSET_WORD_BITS ((unsigned) (CHAR_BIT * sizeof (bitset_word)))
+typedef unsigned long int bitset_word;
+#define BITSET_WORD_BITS ((unsigned int) (CHAR_BIT * sizeof (bitset_word)))
/* Bit index. In theory we might need a type wider than size_t, but
in practice we lose at most a factor of CHAR_BIT by going with
- size_t, and that is good enough. */
+ size_t, and that is good enough. If this type is changed to be
+ wider than size_t, the code needs to be modified to check for
+ overflow when converting bit counts to byte or word counts.
+ The bit and word index types must be unsigned. */
typedef size_t bitset_bindex;
/* Word index. */
typedef size_t bitset_windex;
-#define BITSET_INDEX_MAX ((bitset_word) 1 << (BITSET_WORD_BITS - 1))
+/* Maximum values for commonly-used unsigned types. BITSET_SIZE_MAX
+ always equals SIZE_MAX, but some older systems lack SIZE_MAX. */
+#define BITSET_BINDEX_MAX ((bitset_bindex) -1)
+
+/* Limit max word index to the maximum value of a signed integer
+ to simplify cache disabling. */
+#define BITSET_WINDEX_MAX (((bitset_windex) -1) >> 1)
+#define BITSET_SIZE_MAX ((size_t) -1)
#define BITSET_MSB ((bitset_word) 1 << (BITSET_WORD_BITS - 1))
#define BITSET_LIST_SIZE 1024
-enum bitset_ops {BITSET_OP_ZERO, BITSET_OP_ONES,
- BITSET_OP_COPY, BITSET_OP_NOT,
+enum bitset_ops {BITSET_OP_ZERO, BITSET_OP_ONES,
+ BITSET_OP_COPY, BITSET_OP_NOT,
BITSET_OP_EMPTY_P, BITSET_OP_EQUAL_P,
BITSET_OP_SUBSET_P, BITSET_OP_DISJOINT_P,
- BITSET_OP_AND, BITSET_OP_OR, BITSET_OP_XOR, BITSET_OP_ANDN,
+ BITSET_OP_AND, BITSET_OP_OR, BITSET_OP_XOR, BITSET_OP_ANDN,
BITSET_OP_OR_AND, BITSET_OP_AND_OR, BITSET_OP_ANDN_OR};
struct bbitset_struct
{
- const struct bitset_vtable * vtable;
+ const struct bitset_vtable *vtable;
bitset_windex cindex; /* Cache word index. */
bitset_windex csize; /* Cache size in words. */
bitset_word *cdata; /* Cache data pointer. */
+ bitset_bindex n_bits; /* Number of bits. */
/* Perhaps we could sacrifice another word to indicate
that the bitset is known to be zero, that a bit has been set
in the cache, and that a bit has been cleared in the cache.
};
-typedef struct bitset_struct *bitset;
+typedef union bitset_union *bitset;
+
+
+/* Private accessor macros to bitset structure. */
+#define BITSET_VTABLE_(SRC) (SRC)->b.vtable
+#define BITSET_CINDEX_(SRC) (SRC)->b.cindex
+#define BITSET_CDATA_(SRC) (SRC)->b.cdata
+#define BITSET_CSIZE_(SRC) (SRC)->b.csize
+#define BITSET_NBITS_(SRC) (SRC)->b.n_bits
/* The contents of this structure should be considered private. */
struct bitset_vtable
{
- void (*set) PARAMS ((struct bitset_struct *, bitset_bindex));
- void (*reset) PARAMS ((struct bitset_struct *, bitset_bindex));
- int (*toggle) PARAMS ((struct bitset_struct *, bitset_bindex));
- int (*test) PARAMS ((struct bitset_struct *, bitset_bindex));
- int (*size) PARAMS ((struct bitset_struct *));
- int (*count) PARAMS ((struct bitset_struct *));
-
- int (*empty_p) PARAMS ((struct bitset_struct *));
- void (*ones) PARAMS ((struct bitset_struct *));
- void (*zero) PARAMS ((struct bitset_struct *));
-
- void (*copy) PARAMS ((struct bitset_struct *, struct bitset_struct *));
- int (*disjoint_p) PARAMS ((struct bitset_struct *, struct bitset_struct *));
- int (*equal_p) PARAMS ((struct bitset_struct *, struct bitset_struct *));
- void (*not) PARAMS ((struct bitset_struct *, struct bitset_struct *));
- int (*subset_p) PARAMS ((struct bitset_struct *, struct bitset_struct *));
-
- void (*and) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- int (*and_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- void (*andn) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- int (*andn_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- void (*or) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- int (*or_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- void (*xor) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
- int (*xor_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *));
-
- void (*and_or) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
- int (*and_or_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
- void (*andn_or) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
- int (*andn_or_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
- void (*or_and) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
- int (*or_and_cmp) PARAMS ((struct bitset_struct *, struct bitset_struct *,
- struct bitset_struct *, struct bitset_struct *));
-
- int (*list) PARAMS ((struct bitset_struct *, bitset_bindex *,
- bitset_bindex, bitset_bindex *));
- int (*list_reverse) PARAMS ((struct bitset_struct *, bitset_bindex *,
- bitset_bindex, bitset_bindex *));
- void (*free) PARAMS ((struct bitset_struct *));
+ void (*set) (bitset, bitset_bindex);
+ void (*reset) (bitset, bitset_bindex);
+ bool (*toggle) (bitset, bitset_bindex);
+ bool (*test) (bitset, bitset_bindex);
+ bitset_bindex (*resize) (bitset, bitset_bindex);
+ bitset_bindex (*size) (bitset);
+ bitset_bindex (*count) (bitset);
+
+ bool (*empty_p) (bitset);
+ void (*ones) (bitset);
+ void (*zero) (bitset);
+
+ void (*copy) (bitset, bitset);
+ bool (*disjoint_p) (bitset, bitset);
+ bool (*equal_p) (bitset, bitset);
+ void (*not) (bitset, bitset);
+ bool (*subset_p) (bitset, bitset);
+
+ void (*and) (bitset, bitset, bitset);
+ bool (*and_cmp) (bitset, bitset, bitset);
+ void (*andn) (bitset, bitset, bitset);
+ bool (*andn_cmp) (bitset, bitset, bitset);
+ void (*or) (bitset, bitset, bitset);
+ bool (*or_cmp) (bitset, bitset, bitset);
+ void (*xor) (bitset, bitset, bitset);
+ bool (*xor_cmp) (bitset, bitset, bitset);
+
+ void (*and_or) (bitset, bitset, bitset, bitset);
+ bool (*and_or_cmp) (bitset, bitset, bitset, bitset);
+ void (*andn_or) (bitset, bitset, bitset, bitset);
+ bool (*andn_or_cmp) (bitset, bitset, bitset, bitset);
+ void (*or_and) (bitset, bitset, bitset, bitset);
+ bool (*or_and_cmp) (bitset, bitset, bitset, bitset);
+
+ bitset_bindex (*list) (bitset, bitset_bindex *, bitset_bindex,
+ bitset_bindex *);
+ bitset_bindex (*list_reverse) (bitset, bitset_bindex *, bitset_bindex,
+ bitset_bindex *);
+ void (*free) (bitset);
enum bitset_type type;
};
-#define BITSET_COMPATIBLE_(BSET1, BSET2) ((BSET1)->b.vtable == (BSET2)->b.vtable)
+#define BITSET_COMPATIBLE_(BSET1, BSET2) \
+((BSET1)->b.vtable == (BSET2)->b.vtable)
#define BITSET_CHECK2_(DST, SRC) \
if (!BITSET_COMPATIBLE_ (DST, SRC)) abort ();
|| !BITSET_COMPATIBLE_ (DST, SRC3)) abort ();
+/* Redefine number of bits in bitset DST. */
+#define BITSET_RESIZE_(DST, SIZE) (DST)->b.vtable->resize (DST, SIZE)
+
/* Return size in bits of bitset SRC. */
-#define BITSET_SIZE_(SRC) (SRC)->b.vtable->size (SRC)
+#define BITSET_SIZE_(SRC) (SRC)->b.vtable->size (SRC)
/* Return number of bits set in bitset SRC. */
-#define BITSET_COUNT_(SRC) (SRC)->b.vtable->count (SRC)
+#define BITSET_COUNT_(SRC) (SRC)->b.vtable->count (SRC)
/* Return type of bitset SRC. */
-#define BITSET_TYPE_(DST) (DST)->b.vtable->type
+#define BITSET_TYPE_(DST) (DST)->b.vtable->type
/* Set bit BITNO in bitset DST. */
-#define BITSET_SET_(DST, BITNO) (DST)->b.vtable->set (DST, BITNO)
+#define BITSET_SET_(DST, BITNO) (DST)->b.vtable->set (DST, BITNO)
/* Reset bit BITNO in bitset DST. */
-#define BITSET_RESET_(DST, BITNO) (DST)->b.vtable->reset (DST, BITNO)
+#define BITSET_RESET_(DST, BITNO) (DST)->b.vtable->reset (DST, BITNO)
/* Toggle bit BITNO in bitset DST. */
-#define BITSET_TOGGLE_(DST, BITNO) (DST)->b.vtable->toggle (DST, BITNO)
+#define BITSET_TOGGLE_(DST, BITNO) (DST)->b.vtable->toggle (DST, BITNO)
/* Return non-zero if bit BITNO in bitset SRC is set. */
-#define BITSET_TEST_(SRC, BITNO) (SRC)->b.vtable->test (SRC, BITNO)
+#define BITSET_TEST_(SRC, BITNO) (SRC)->b.vtable->test (SRC, BITNO)
/* Free bitset SRC. */
#define BITSET_FREE_(SRC)\
(SRC1)->b.vtable->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) \
- (BSET)->b.vtable->list (BSET, LIST, NUM, NEXT)
+ (BSET)->b.vtable->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_LIST_REVERSE_(BSET, LIST, NUM, NEXT) \
- (BSET)->b.vtable->list_reverse (BSET, LIST, NUM, NEXT)
+ (BSET)->b.vtable->list_reverse (BSET, LIST, NUM, NEXT)
/* Private functions for bitset implementations. */
-
-extern int bitset_toggle_ PARAMS ((bitset, bitset_bindex));
-extern int bitset_count_ PARAMS ((bitset));
+extern bool bitset_toggle_ (bitset, bitset_bindex);
+
+extern bitset_bindex bitset_count_ (bitset);
+
+extern bitset_bindex bitset_size_ (bitset);
+
+extern bool bitset_copy_ (bitset, bitset);
+
+extern void bitset_and_or_ (bitset, bitset, bitset, bitset);
+
+extern bool bitset_and_or_cmp_ (bitset, bitset, bitset, bitset);
-extern int bitset_copy_ PARAMS ((bitset, bitset));
+extern void bitset_andn_or_ (bitset, bitset, bitset, bitset);
-extern int bitset_and_or_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
+extern bool bitset_andn_or_cmp_ (bitset, bitset, bitset, bitset);
-extern int bitset_andn_or_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
+extern void bitset_or_and_ (bitset, bitset, bitset, bitset);
-extern int bitset_or_and_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
+extern bool bitset_or_and_cmp_ (bitset, bitset, bitset, bitset);
#endif /* _BBITSET_H */
projects / bison.git / blobdiff