X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/613f5e1a895b0742c9b6c5e9461e4cf3f7389d7e..c843aaab352ab1f40c7d218fb5bb2c6fd6fd3a88:/lib/bbitset.h
diff --git a/lib/bbitset.h b/lib/bbitset.h
index 8ea98a8c..d9d5e4b5 100644
--- a/lib/bbitset.h
+++ b/lib/bbitset.h
@@ -1,228 +1,302 @@
/* Base bitset stuff.
- Copyright (C) 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2006, 2009 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
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see . */
#ifndef _BBITSET_H
#define _BBITSET_H
#include "libiberty.h"
-#ifdef HAVE_LIMITS_H
+#include
#include
-#endif
-
-/* Currently we support three flavours of bitsets:
- BITSET_ARRAY: Array of bits (fixed size, faster).
- 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.
+#include
+
+/* Currently we support five flavours of bitsets:
+ BITSET_ARRAY: Array of bits (fixed size, fast for dense bitsets).
+ 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"}
-enum bitset_alloc_type {BITSET_MALLOC, BITSET_OBALLOC};
+extern const char * const bitset_type_names[];
-/* Non-zero to use inline functions instead of macros. */
-#define BITSET_INLINE 0
+enum bitset_alloc_type {BITSET_MALLOC, BITSET_OBALLOC};
/* 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. */
-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. */
+ 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.
+ This would speed up some of the searches but slightly slow down
+ bit set/reset operations of cached bits. */
+};
+
+
+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) (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_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 ();
+
+
+/* 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.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. */
+extern bool bitset_toggle_ (bitset, bitset_bindex);
-typedef struct bitset_struct *bitset;
+extern bitset_bindex bitset_count_ (bitset);
+extern bitset_bindex bitset_size_ (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 bool bitset_copy_ (bitset, bitset);
-#define BITSET_COMPATIBLE_(BSET1, BSET2) ((BSET1)->b.ops == (BSET2)->b.ops)
+extern void bitset_and_or_ (bitset, bitset, bitset, bitset);
-#define BITSET_CHECK2_(DST, SRC) \
-if (!BITSET_COMPATIBLE_ (DST, SRC)) abort ();
+extern bool bitset_and_or_cmp_ (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_ (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 bool bitset_andn_or_cmp_ (bitset, bitset, bitset, bitset);
+extern void bitset_or_and_ (bitset, bitset, bitset, bitset);
-extern int bitset_op4 PARAMS ((bitset, bitset, bitset, bitset,
- enum bitset_ops op));
+extern bool bitset_or_and_cmp_ (bitset, bitset, bitset, bitset);
#endif /* _BBITSET_H */