X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6aa452a643c65a8df244013e05d41854531ec762..26a69b31fa0e2c84cbc0a38f198fb456a42e0424:/lib/bbitset.h?ds=inline diff --git a/lib/bbitset.h b/lib/bbitset.h index 059c3e44..3bcb92cd 100644 --- a/lib/bbitset.h +++ b/lib/bbitset.h @@ -1,5 +1,5 @@ /* 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 @@ -14,68 +14,81 @@ GNU General Public License for more details. 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 #include -#endif +#include -/* 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. @@ -84,68 +97,64 @@ struct bbitset_struct }; -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 (); @@ -159,26 +168,29 @@ if (!BITSET_COMPATIBLE_ (DST, SRC1) || !BITSET_COMPATIBLE_ (DST, SRC2) \ || !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)\ @@ -252,31 +264,39 @@ if (!BITSET_COMPATIBLE_ (DST, SRC1) || !BITSET_COMPATIBLE_ (DST, SRC2) \ (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 */