#endif
/* Currently we support three flavours of bitsets:
- BITSET_ARRAY: Array of bits (fixed size, faster).
+ 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).
+ 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.
*/
BITSET_STATS};
#define BITSET_TYPE_NAMES {"abitset", "lbitset", "ebitset"}
+extern const char * const bitset_type_names[];
+
enum bitset_alloc_type {BITSET_MALLOC, BITSET_OBALLOC};
/* Non-zero to use inline functions instead of macros. */
/* Data type used to store a word of bits. */
typedef unsigned long bitset_word;
-#define BITSET_WORD_BITS ((unsigned) CHAR_BIT * sizeof (bitset_word))
+#define BITSET_WORD_BITS ((unsigned) (CHAR_BIT * sizeof (bitset_word)))
-/* Bit index. */
-typedef unsigned long bitset_bindex;
+/* 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. 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 unsigned long bitset_windex;
+typedef size_t bitset_windex;
+
+/* 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)
-#define BITSET_INDEX_MAX ((1U << (BITSET_WORD_BITS - 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 (1U << (BITSET_WORD_BITS - 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;
+ bitset_windex cindex; /* Cache word index. */
+ bitset_windex csize; /* Cache size in words. */
+ bitset_word *cdata; /* Cache data pointer. */
+ /* 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.
+ This would speed up some of the searches but slightly slow down
+ bit set/reset operations of cached bits. */
+};
+
+
+typedef union bitset_union *bitset;
+
+
+/* The contents of this structure should be considered private. */
+struct bitset_vtable
+{
+ void (*set) PARAMS ((bitset, bitset_bindex));
+ void (*reset) PARAMS ((bitset, bitset_bindex));
+ int (*toggle) PARAMS ((bitset, bitset_bindex));
+ int (*test) PARAMS ((bitset, bitset_bindex));
+ bitset_bindex (*size) PARAMS ((bitset));
+ bitset_bindex (*count) PARAMS ((bitset));
+
+ int (*empty_p) PARAMS ((bitset));
+ void (*ones) PARAMS ((bitset));
+ void (*zero) PARAMS ((bitset));
+
+ void (*copy) PARAMS ((bitset, bitset));
+ int (*disjoint_p) PARAMS ((bitset, bitset));
+ int (*equal_p) PARAMS ((bitset, bitset));
+ void (*not) PARAMS ((bitset, bitset));
+ int (*subset_p) PARAMS ((bitset, bitset));
+
+ void (*and) PARAMS ((bitset, bitset, bitset));
+ int (*and_cmp) PARAMS ((bitset, bitset, bitset));
+ void (*andn) PARAMS ((bitset, bitset, bitset));
+ int (*andn_cmp) PARAMS ((bitset, bitset, bitset));
+ void (*or) PARAMS ((bitset, bitset, bitset));
+ int (*or_cmp) PARAMS ((bitset, bitset, bitset));
+ void (*xor) PARAMS ((bitset, bitset, bitset));
+ int (*xor_cmp) PARAMS ((bitset, bitset, bitset));
+
+ void (*and_or) PARAMS ((bitset, bitset, bitset, bitset));
+ int (*and_or_cmp) PARAMS ((bitset, bitset, bitset, bitset));
+ void (*andn_or) PARAMS ((bitset, bitset, bitset, bitset));
+ int (*andn_or_cmp) PARAMS ((bitset, bitset, bitset, bitset));
+ void (*or_and) PARAMS ((bitset, bitset, bitset, bitset));
+ int (*or_and_cmp) PARAMS ((bitset, bitset, bitset, bitset));
+
+ bitset_bindex (*list) PARAMS ((bitset, bitset_bindex *,
+ bitset_bindex, bitset_bindex *));
+ bitset_bindex (*list_reverse) PARAMS ((bitset,
+ bitset_bindex *, bitset_bindex,
+ bitset_bindex *));
+ void (*free) PARAMS ((bitset));
+ enum bitset_type type;
+};
+
+#define BITSET_COMPATIBLE_(BSET1, BSET2) ((BSET1)->b.vtable == (BSET2)->b.vtable)
+
+#define BITSET_CHECK2_(DST, SRC) \
+if (!BITSET_COMPATIBLE_ (DST, SRC)) abort ();
+
+#define BITSET_CHECK3_(DST, SRC1, SRC2) \
+if (!BITSET_COMPATIBLE_ (DST, SRC1) \
+ || !BITSET_COMPATIBLE_ (DST, SRC2)) abort ();
+
+#define BITSET_CHECK4_(DST, SRC1, SRC2, SRC3) \
+if (!BITSET_COMPATIBLE_ (DST, SRC1) || !BITSET_COMPATIBLE_ (DST, SRC2) \
+ || !BITSET_COMPATIBLE_ (DST, SRC3)) abort ();
+
+
/* Return size in bits of bitset SRC. */
-#define BITSET_SIZE_(SRC) (SRC)->b.ops->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)
/* Return type of bitset SRC. */
-#define BITSET_TYPE_(DST) (DST)->b.ops->type
+#define BITSET_TYPE_(DST) (DST)->b.vtable->type
/* Set bit BITNO in bitset DST. */
-#define BITSET_SET_(DST, BITNO) (DST)->b.ops->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.ops->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)
/* Return non-zero if bit BITNO in bitset SRC is set. */
-#define BITSET_TEST_(SRC, BITNO) (SRC)->b.ops->test (SRC, BITNO)
+#define BITSET_TEST_(SRC, BITNO) (SRC)->b.vtable->test (SRC, BITNO)
/* Free bitset SRC. */
#define BITSET_FREE_(SRC)\
- ((SRC)->b.ops->free ? (SRC)->b.ops->free (SRC) :(void)0)
+ ((SRC)->b.vtable->free ? (SRC)->b.vtable->free (SRC) :(void)0)
-/* Perform operation OP on DST. */
-#define BITSET_OP1_(DST, OP) (DST)->b.ops->op1 (DST, OP)
-/* Perform operation OP on SRC and store in DST. */
-#define BITSET_OP2_(DST, SRC, OP) (DST)->b.ops->op2 (DST, SRC, OP)
-
-/* DST = SRC1 OP SRC2. */
-#define BITSET_OP3_(DST, SRC1, SRC2, OP) \
-(DST)->b.ops->op3 (DST, SRC1, SRC2, OP)
+/* Return SRC == 0. */
+#define BITSET_EMPTY_P_(SRC) (SRC)->b.vtable->empty_p (SRC)
-/* DST = (SRC1 OP1 SRC2) OP2 SRC3. */
-#define BITSET_OP4_(DST, SRC1, SRC2, SRC3, OP) \
-(DST)->b.ops->op4 (DST, SRC1, SRC2, SRC3, OP)
+/* DST = ~0. */
+#define BITSET_ONES_(DST) (DST)->b.vtable->ones (DST)
/* DST = 0. */
-#define BITSET_ZERO_(DST) BITSET_OP1_ (DST, BITSET_OP_ZERO);
+#define BITSET_ZERO_(DST) (DST)->b.vtable->zero (DST)
-/* DST = ~0. */
-#define BITSET_ONES_(DST) BITSET_OP1_ (DST, BITSET_OP_ONES);
-/* Return SRC == 0. */
-#define BITSET_EMPTY_P_(SRC) BITSET_OP1_ (SRC, BITSET_OP_EMPTY_P);
+
+/* DST = SRC. */
+#define BITSET_COPY_(DST, SRC) (SRC)->b.vtable->copy (DST, SRC)
+
+/* Return DST & SRC == 0. */
+#define BITSET_DISJOINT_P_(DST, SRC) (SRC)->b.vtable->disjoint_p (DST, SRC)
/* Return DST == SRC. */
-#define BITSET_EQUAL_P_(DST, SRC) BITSET_OP2_ (DST, SRC, BITSET_OP_EQUAL_P)
+#define BITSET_EQUAL_P_(DST, SRC) (SRC)->b.vtable->equal_p (DST, SRC)
+
+/* DST = ~SRC. */
+#define BITSET_NOT_(DST, SRC) (SRC)->b.vtable->not (DST, SRC)
/* Return DST == DST | SRC. */
-#define BITSET_SUBSET_P_(DST, SRC) BITSET_OP2_ (DST, SRC, BITSET_OP_SUBSET_P)
+#define BITSET_SUBSET_P_(DST, SRC) (SRC)->b.vtable->subset_p (DST, SRC)
-/* Return DST & SRC == 0. */
-#define BITSET_DISJOINT_P_(DST, SRC)\
- BITSET_OP2_ (DST, SRC, BITSET_OP_DISJOINT_P)
-/* DST = SRC. */
-#define BITSET_COPY_(DST, SRC) BITSET_OP2_ (DST, SRC, BITSET_OP_COPY)
+/* DST = SRC1 & SRC2. */
+#define BITSET_AND_(DST, SRC1, SRC2) (SRC1)->b.vtable->and (DST, SRC1, SRC2)
+#define BITSET_AND_CMP_(DST, SRC1, SRC2) (SRC1)->b.vtable->and_cmp (DST, SRC1, SRC2)
-/* DST = ~SRC. */
-#define BITSET_NOT_(DST, SRC) BITSET_OP2_ (DST, SRC, BITSET_OP_NOT)
+/* DST = SRC1 & ~SRC2. */
+#define BITSET_ANDN_(DST, SRC1, SRC2) (SRC1)->b.vtable->andn (DST, SRC1, SRC2)
+#define BITSET_ANDN_CMP_(DST, SRC1, SRC2) (SRC1)->b.vtable->andn_cmp (DST, SRC1, SRC2)
/* DST = SRC1 | SRC2. */
-#define BITSET_OR_(DST, SRC1, SRC2) BITSET_OP3_ (DST, SRC1, SRC2,\
- BITSET_OP_OR)
+#define BITSET_OR_(DST, SRC1, SRC2) (SRC1)->b.vtable->or (DST, SRC1, SRC2)
+#define BITSET_OR_CMP_(DST, SRC1, SRC2) (SRC1)->b.vtable->or_cmp (DST, SRC1, SRC2)
/* DST = SRC1 ^ SRC2. */
-#define BITSET_XOR_(DST, SRC1, SRC2) BITSET_OP3_ (DST, SRC1, SRC2,\
- BITSET_OP_XOR)
+#define BITSET_XOR_(DST, SRC1, SRC2) (SRC1)->b.vtable->xor (DST, SRC1, SRC2)
+#define BITSET_XOR_CMP_(DST, SRC1, SRC2) (SRC1)->b.vtable->xor_cmp (DST, SRC1, SRC2)
-/* DST = SRC1 & SRC2. */
-#define BITSET_AND_(DST, SRC1, SRC2) BITSET_OP3_ (DST, SRC1, SRC2, \
- BITSET_OP_AND)
-/* DST = SRC1 & ~SRC2. */
-#define BITSET_ANDN_(DST, SRC1, SRC2) BITSET_OP3_ (DST, SRC1, SRC2, \
- BITSET_OP_ANDN)
/* DST = (SRC1 & SRC2) | SRC3. Return non-zero if
DST != (SRC1 & SRC2) | SRC3. */
-#define BITSET_AND_OR_(DST, SRC1, SRC2, SRC3)\
- BITSET_OP4_ (DST, SRC1, SRC2, SRC3, BITSET_OP_AND_OR)
+#define BITSET_AND_OR_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->and_or (DST, SRC1, SRC2, SRC3)
+#define BITSET_AND_OR_CMP_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->and_or_cmp (DST, SRC1, SRC2, SRC3)
+
+/* DST = (SRC1 & ~SRC2) | SRC3. Return non-zero if
+ DST != (SRC1 & ~SRC2) | SRC3. */
+#define BITSET_ANDN_OR_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->andn_or (DST, SRC1, SRC2, SRC3)
+#define BITSET_ANDN_OR_CMP_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->andn_or_cmp (DST, SRC1, SRC2, SRC3)
/* DST = (SRC1 | SRC2) & SRC3. Return non-zero if
DST != (SRC1 | SRC2) & SRC3. */
-#define BITSET_OR_AND_(DST, SRC1, SRC2, SRC3)\
- BITSET_OP4_ (DST, SRC1, SRC2, SRC3, BITSET_OP_OR_AND)
+#define BITSET_OR_AND_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->or_and (DST, SRC1, SRC2, SRC3)
+#define BITSET_OR_AND_CMP_(DST, SRC1, SRC2, SRC3) \
+ (SRC1)->b.vtable->or_and_cmp (DST, SRC1, SRC2, SRC3)
-/* DST = (SRC1 & ~SRC2) | SRC3. Return non-zero if
- DST != (SRC1 & ~SRC2) | SRC3. */
-#define BITSET_ANDN_OR_(DST, SRC1, SRC2, SRC3)\
- BITSET_OP4_ (DST, SRC1, SRC2, SRC3, BITSET_OP_ANDN_OR)
-/* 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.ops->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_REVERSE_LIST_(BSET, LIST, NUM, NEXT) \
-(BSET)->b.ops->reverse_list (BSET, LIST, NUM, NEXT)
-
+#define BITSET_LIST_REVERSE_(BSET, LIST, NUM, NEXT) \
+ (BSET)->b.vtable->list_reverse (BSET, LIST, NUM, NEXT)
-struct bbitset_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. */
- /* 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.
- This would speed up some of the searches but slightly slow down
- bit set/reset operations of cached bits. */
-};
+/* Private functions for bitset implementations. */
-typedef struct bitset_struct *bitset;
+extern int bitset_toggle_ PARAMS ((bitset, bitset_bindex));
+extern bitset_bindex bitset_count_ PARAMS ((bitset));
-/* The contents of this structure should be considered private. */
-struct bitset_ops_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;
-};
+extern int bitset_copy_ PARAMS ((bitset, bitset));
-#define BITSET_COMPATIBLE_(BSET1, BSET2) ((BSET1)->b.ops == (BSET2)->b.ops)
+extern void bitset_and_or_ PARAMS ((bitset, bitset, bitset, bitset));
-#define BITSET_CHECK2_(DST, SRC) \
-if (!BITSET_COMPATIBLE_ (DST, SRC)) abort ();
+extern int bitset_and_or_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
-#define BITSET_CHECK3_(DST, SRC1, SRC2) \
-if (!BITSET_COMPATIBLE_ (DST, SRC1) \
- || !BITSET_COMPATIBLE_ (DST, SRC2)) abort ();
+extern void bitset_andn_or_ PARAMS ((bitset, bitset, bitset, bitset));
-#define BITSET_CHECK4_(DST, SRC1, SRC2, SRC3) \
-if (!BITSET_COMPATIBLE_ (DST, SRC1) || !BITSET_COMPATIBLE_ (DST, SRC2) \
- || !BITSET_COMPATIBLE_ (DST, SRC3)) abort ();
+extern int bitset_andn_or_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
+extern void bitset_or_and_ PARAMS ((bitset, bitset, bitset, bitset));
-extern int bitset_op4 PARAMS ((bitset, bitset, bitset, bitset,
- enum bitset_ops op));
+extern int bitset_or_and_cmp_ PARAMS ((bitset, bitset, bitset, bitset));
#endif /* _BBITSET_H */
projects / bison.git / blobdiff