/* General bitsets.
- 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
#endif
#include <stdlib.h>
+#include <string.h>
#include "bitset.h"
#include "abitset.h"
#include "lbitset.h"
#include "ebitset.h"
+#include "vbitset.h"
#include "bitset_stats.h"
#include "obstack.h"
-static void bitset_print PARAMS ((FILE *, bitset, int));
+const char * const bitset_type_names[] = BITSET_TYPE_NAMES;
/* Return number of bytes required to create a N_BIT bitset
of TYPE. The bitset may grow to require more bytes than this. */
-int
-bitset_bytes (type, n_bits)
- enum bitset_type type;
- bitset_bindex n_bits;
+size_t
+bitset_bytes (enum bitset_type type, bitset_bindex n_bits)
{
- unsigned int bytes;
+ size_t bytes;
if (bitset_stats_enabled)
return bitset_stats_bytes ();
bytes = ebitset_bytes (n_bits);
break;
+ case BITSET_VARRAY:
+ bytes = vbitset_bytes (n_bits);
+ break;
+
default:
abort ();
}
/* Initialise bitset BSET of TYPE for N_BITS. */
bitset
-bitset_init (bset, n_bits, type)
- bitset bset;
- bitset_bindex n_bits;
- enum bitset_type type;
+bitset_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
{
if (bitset_stats_enabled)
return bitset_stats_init (bset, n_bits, type);
-
+
switch (type)
{
case BITSET_ARRAY:
case BITSET_TABLE:
return ebitset_init (bset, n_bits);
+ case BITSET_VARRAY:
+ return vbitset_init (bset, n_bits);
+
default:
abort ();
}
specified by ATTR. For variable size bitsets, N_BITS is only a
hint and may be zero. */
enum bitset_type
-bitset_type_choose (n_bits, attr)
- bitset_bindex n_bits ATTRIBUTE_UNUSED;
- unsigned int attr;
+bitset_type_choose (bitset_bindex n_bits ATTRIBUTE_UNUSED, unsigned int attr)
{
- enum bitset_type type;
-
/* Check attributes. */
if (attr & BITSET_FIXED && attr & BITSET_VARIABLE)
abort ();
if (attr & BITSET_SPARSE && attr & BITSET_DENSE)
abort ();
- /* Note that sometimes we will be asked for a zero length
- fixed size bitset. */
+ /* Choose the type of bitset. Note that sometimes we will be asked
+ for a zero length fixed size bitset. */
- /* Choose the type of bitset. */
+
+ /* If no attributes selected, choose a good compromise. */
+ if (!attr)
+ return BITSET_VARRAY;
- type = BITSET_ARRAY;
- /* Currently, the simple bitsets do not support a variable size. */
- if (attr & BITSET_VARIABLE || attr & BITSET_SPARSE)
- {
- type = BITSET_LIST;
- if (attr & BITSET_DENSE || attr & BITSET_GREEDY)
- type = BITSET_TABLE;
- }
+ if (attr & BITSET_SPARSE)
+ return BITSET_LIST;
+
+ if (attr & BITSET_FIXED)
+ return BITSET_ARRAY;
- return type;
+ if (attr & BITSET_GREEDY)
+ return BITSET_TABLE;
+
+ return BITSET_VARRAY;
}
/* Create a bitset of N_BITS of type TYPE. */
bitset
-bitset_alloc (n_bits, type)
- bitset_bindex n_bits;
- enum bitset_type type;
+bitset_alloc (bitset_bindex n_bits, enum bitset_type type)
{
- unsigned int bytes;
+ size_t bytes;
bitset bset;
bytes = bitset_bytes (type, n_bits);
/* Create a bitset of N_BITS of type TYPE. */
bitset
-bitset_obstack_alloc (bobstack, n_bits, type)
- struct obstack *bobstack;
- bitset_bindex n_bits;
- enum bitset_type type;
+bitset_obstack_alloc (struct obstack *bobstack,
+ bitset_bindex n_bits, enum bitset_type type)
{
- unsigned int bytes;
+ size_t bytes;
bitset bset;
bytes = bitset_bytes (type, n_bits);
/* Create a bitset of N_BITS and with attribute hints specified by
ATTR. */
bitset
-bitset_create (n_bits, attr)
- bitset_bindex n_bits;
- unsigned int attr;
+bitset_create (bitset_bindex n_bits, unsigned int attr)
{
enum bitset_type type;
/* Free bitset BSET. */
void
-bitset_free (bset)
- bitset bset;
+bitset_free (bitset bset)
{
BITSET_FREE_ (bset);
free (bset);
/* Free bitset BSET allocated on obstack. */
void
-bitset_obstack_free (bset)
- bitset bset;
+bitset_obstack_free (bitset bset)
{
BITSET_FREE_ (bset);
}
/* Return bitset type. */
enum bitset_type
-bitset_type_get (bset)
- bitset bset;
+bitset_type_get (bitset bset)
{
enum bitset_type type;
type = BITSET_TYPE_ (bset);
if (type != BITSET_STATS)
return type;
-
+
return bitset_stats_type_get (bset);
}
+/* Return name of bitset type. */
+const char *
+bitset_type_name_get (bitset bset)
+{
+ enum bitset_type type;
+
+ type = bitset_type_get (bset);
+
+ return bitset_type_names[type];
+}
+
+
/* Find next bit set in SRC starting from and including BITNO.
- Return -1 if SRC empty. */
-int
-bitset_next (src, bitno)
- bitset src;
- bitset_bindex bitno;
+ Return BITSET_BINDEX_MAX if SRC empty. */
+bitset_bindex
+bitset_next (bitset src, bitset_bindex bitno)
{
bitset_bindex val;
bitset_bindex next = bitno;
if (!bitset_list (src, &val, 1, &next))
- return -1;
+ return BITSET_BINDEX_MAX;
return val;
}
+/* Return true if both bitsets are of the same type and size. */
+extern bool
+bitset_compatible_p (bitset bset1, bitset bset2)
+{
+ return BITSET_COMPATIBLE_ (bset1, bset2);
+}
+
+
/* Find previous bit set in SRC starting from and including BITNO.
- Return -1 if SRC empty. */
-int
-bitset_prev (src, bitno)
- bitset src;
- bitset_bindex bitno;
+ Return BITSET_BINDEX_MAX if SRC empty. */
+bitset_bindex
+bitset_prev (bitset src, bitset_bindex bitno)
{
bitset_bindex val;
bitset_bindex next = bitno;
- if (!bitset_reverse_list (src, &val, 1, &next))
- return -1;
+ if (!bitset_list_reverse (src, &val, 1, &next))
+ return BITSET_BINDEX_MAX;
return val;
}
/* Find first set bit. */
-int
-bitset_first (src)
- bitset src;
+bitset_bindex
+bitset_first (bitset src)
{
return bitset_next (src, 0);
}
/* Find last set bit. */
-int
-bitset_last (src)
- bitset src;
+bitset_bindex
+bitset_last (bitset src)
{
return bitset_prev (src, 0);
}
-/* Return non-zero if BITNO in SRC is the only set bit. */
-int
-bitset_only_set_p (src, bitno)
- bitset src;
- bitset_bindex bitno;
+/* Is BITNO in SRC the only set bit? */
+bool
+bitset_only_set_p (bitset src, bitset_bindex bitno)
{
bitset_bindex val[2];
bitset_bindex next = 0;
if (bitset_list (src, val, 2, &next) != 1)
- return 0;
+ return false;
return val[0] == bitno;
}
-/* Toggle bit BITNO in bitset BSET and return non-zero if now set. */
-int
-bitset_toggle (bset, bitno)
- bitset bset;
- bitset_bindex bitno;
-{
- /* This routine is for completeness. It could be optimized if
- required. */
- if (bitset_test (bset, bitno))
- {
- bitset_reset (bset, bitno);
- return 0;
- }
- else
- {
- bitset_set (bset, bitno);
- return 1;
- }
-}
-
-
/* Print contents of bitset BSET to FILE. */
static void
-bitset_print (file, bset, verbose)
- FILE *file;
- bitset bset;
- int verbose;
+bitset_print (FILE *file, bitset bset, bool verbose)
{
- unsigned int i, pos;
+ unsigned int pos;
+ bitset_bindex i;
bitset_iterator iter;
if (verbose)
- fprintf (file, "n_bits = %d, set = {", bitset_size (bset));
+ fprintf (file, "n_bits = %lu, set = {",
+ (unsigned long int) bitset_size (bset));
pos = 30;
BITSET_FOR_EACH (iter, bset, i, 0)
}
-/* DST = SRC. Return non-zero if DST != SRC. */
-int
-bitset_copy (dst, src)
- bitset dst;
- bitset src;
+/* Dump bitset BSET to FILE. */
+void
+bitset_dump (FILE *file, bitset bset)
{
- unsigned int i;
- bitset_iterator iter;
+ bitset_print (file, bset, false);
+}
- if (BITSET_COMPATIBLE_ (dst, src))
- return BITSET_COPY_ (dst, src);
- /* Convert bitset types. We assume that the DST bitset
- is large enough to hold the SRC bitset. */
- bitset_zero (dst);
- BITSET_FOR_EACH (iter, src, i, 0)
- {
- bitset_set (dst, i);
- };
+/* Release memory associated with bitsets. */
+void
+bitset_release_memory (void)
+{
+ lbitset_release_memory ();
+ ebitset_release_memory ();
+}
+
- return 1;
+/* Toggle bit BITNO in bitset BSET and the new value of the bit. */
+bool
+bitset_toggle_ (bitset bset, bitset_bindex bitno)
+{
+ /* This routine is for completeness. It could be optimized if
+ required. */
+ if (bitset_test (bset, bitno))
+ {
+ bitset_reset (bset, bitno);
+ return false;
+ }
+ else
+ {
+ bitset_set (bset, bitno);
+ return true;
+ }
}
-/* Return size in bits of bitset SRC. */
-int
-bitset_size (src)
- bitset src;
+/* Return number of bits in bitset SRC. */
+bitset_bindex
+bitset_size_ (bitset src)
{
- return BITSET_SIZE_ (src);
+ return BITSET_NBITS_ (src);
}
/* Return number of bits set in bitset SRC. */
-int
-bitset_count (src)
- bitset src;
+bitset_bindex
+bitset_count_ (bitset src)
{
bitset_bindex list[BITSET_LIST_SIZE];
bitset_bindex next;
- int num;
- int count;
-
+ bitset_bindex num;
+ bitset_bindex count;
+
/* This could be greatly sped up by adding a count method for each
bitset implementation that uses a direct technique (based on
masks) for counting the number of bits set in a word. */
for (count = 0; (num = bitset_list (src, list, BITSET_LIST_SIZE, &next));
count += num)
continue;
-
- return count;
-}
-
-
-/* DST = 0. */
-int
-bitset_zero (dst)
- bitset dst;
-{
- return BITSET_ZERO_ (dst);
-}
-
-
-/* DST = ~0. */
-int
-bitset_ones (dst)
- bitset dst;
-{
- return BITSET_ONES_ (dst);
-}
-
-
-/* Return SRC == 0. */
-int
-bitset_empty_p (src)
- bitset src;
-{
- return BITSET_EMPTY_P_ (src);
-}
-
-
-/* Return DST == DST | SRC. */
-int
-bitset_subset_p (dst, src)
- bitset dst;
- bitset src;
-{
- return BITSET_SUBSET_P_ (dst, src);
-}
-
-
-/* Return DST == SRC. */
-int
-bitset_equal_p (dst, src)
- bitset dst;
- bitset src;
-{
- return BITSET_EQUAL_P_ (dst, src);
-}
-
-
-/* Return DST & SRC == 0. */
-int
-bitset_disjoint_p (dst, src)
- bitset dst;
- bitset src;
-{
- return BITSET_DISJOINT_P_ (dst, src);
-}
-
-
-/* DST = ~SRC. */
-int
-bitset_not (dst, src)
- bitset dst;
- bitset src;
-{
- return BITSET_NOT_ (dst, src);
-}
-
-
-/* DST = SRC1 | SRC2. Return non-zero if DST != SRC1 | SRC2. */
-int
-bitset_or (dst, src1, src2)
- bitset dst;
- bitset src1;
- bitset src2;
-{
- return BITSET_OR_ (dst, src1, src2);
-}
-
-/* DST = SRC1 & SRC2. Return non-zero if DST != SRC1 & SRC2. */
-int
-bitset_and (dst, src1, src2)
- bitset dst;
- bitset src1;
- bitset src2;
-{
- return BITSET_AND_ (dst, src1, src2);
+ return count;
}
-/* DST = SRC1 ^ SRC2. Return non-zero if DST != SRC1 ^ SRC2. */
-int
-bitset_xor (dst, src1, src2)
- bitset dst;
- bitset src1;
- bitset src2;
+/* DST = SRC. Return true if DST != SRC.
+ This is a fallback for the case where SRC and DST are different
+ bitset types. */
+bool
+bitset_copy_ (bitset dst, bitset src)
{
- return BITSET_XOR_ (dst, src1, src2);
-}
+ bitset_bindex i;
+ bitset_iterator iter;
+ /* Convert bitset types. We assume that the DST bitset
+ is large enough to hold the SRC bitset. */
+ bitset_zero (dst);
+ BITSET_FOR_EACH (iter, src, i, 0)
+ {
+ bitset_set (dst, i);
+ };
-/* DST = SRC1 & ~SRC2. Return non-zero if DST != SRC1 & ~SRC2. */
-int
-bitset_andn (dst, src1, src2)
- bitset dst;
- bitset src1;
- bitset src2;
-{
- return BITSET_ANDN_ (dst, src1, src2);
+ return true;
}
/* This is a fallback for implementations that do not support
four operand operations. */
-int
-bitset_op4 (dst, src1, src2, src3, op)
- bitset dst;
- bitset src1;
- bitset src2;
- bitset src3;
- enum bitset_ops op;
+static inline bool
+bitset_op4_cmp (bitset dst, bitset src1, bitset src2, bitset src3,
+ enum bitset_ops op)
{
- int changed = 0;
+ bool changed = false;
+ bool stats_enabled_save;
bitset tmp;
/* Create temporary bitset. */
+ stats_enabled_save = bitset_stats_enabled;
+ bitset_stats_enabled = false;
tmp = bitset_alloc (0, bitset_type_get (dst));
+ bitset_stats_enabled = stats_enabled_save;
switch (op)
{
case BITSET_OP_OR_AND:
- BITSET_OR_ (tmp, src1, src2);
- changed = BITSET_AND_ (dst, src3, tmp);
+ bitset_or (tmp, src1, src2);
+ changed = bitset_and_cmp (dst, src3, tmp);
break;
case BITSET_OP_AND_OR:
- BITSET_AND_ (tmp, src1, src2);
- changed = BITSET_OR_ (dst, src3, tmp);
+ bitset_and (tmp, src1, src2);
+ changed = bitset_or_cmp (dst, src3, tmp);
break;
case BITSET_OP_ANDN_OR:
- BITSET_ANDN_ (tmp, src1, src2);
- changed = BITSET_OR_ (dst, src3, tmp);
+ bitset_andn (tmp, src1, src2);
+ changed = bitset_or_cmp (dst, src3, tmp);
break;
default:
}
-/* DST = (SRC1 | SRC2) & SRC3. Return non-zero if
- DST != (SRC1 | SRC2) & SRC3. */
-int
-bitset_or_and (dst, src1, src2, src3)
- bitset dst;
- bitset src1;
- bitset src2;
- bitset src3;
+/* DST = (SRC1 & SRC2) | SRC3. */
+void
+bitset_and_or_ (bitset dst, bitset src1, bitset src2, bitset src3)
{
- return BITSET_OR_AND_ (dst, src1, src2, src3);
+ bitset_and_or_cmp_ (dst, src1, src2, src3);
}
/* DST = (SRC1 & SRC2) | SRC3. Return non-zero if
DST != (SRC1 & SRC2) | SRC3. */
-int
-bitset_and_or (dst, src1, src2, src3)
- bitset dst;
- bitset src1;
- bitset src2;
- bitset src3;
+bool
+bitset_and_or_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)
{
- return BITSET_AND_OR_ (dst, src1, src2, src3);
+ return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_AND_OR);
+}
+
+
+/* DST = (SRC1 & ~SRC2) | SRC3. */
+void
+bitset_andn_or_ (bitset dst, bitset src1, bitset src2, bitset src3)
+{
+ bitset_andn_or_cmp_ (dst, src1, src2, src3);
}
/* DST = (SRC1 & ~SRC2) | SRC3. Return non-zero if
DST != (SRC1 & ~SRC2) | SRC3. */
-int
-bitset_andn_or (dst, src1, src2, src3)
- bitset dst;
- bitset src1;
- bitset src2;
- bitset src3;
+bool
+bitset_andn_or_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)
{
- return BITSET_ANDN_OR_ (dst, src1, src2, src3);
+ return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_ANDN_OR);
}
-/* Dump bitset BSET to FILE. */
+/* DST = (SRC1 | SRC2) & SRC3. */
void
-bitset_dump (file, bset)
- FILE *file;
- bitset bset;
+bitset_or_and_ (bitset dst, bitset src1, bitset src2, bitset src3)
{
- bitset_print (file, bset, 0);
+ bitset_or_and_cmp_ (dst, src1, src2, src3);
}
-/* Function to be called from debugger to print bitset. */
-void
-debug_bitset (bset)
- bitset bset;
+/* DST = (SRC1 | SRC2) & SRC3. Return non-zero if
+ DST != (SRC1 | SRC2) & SRC3. */
+bool
+bitset_or_and_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)
{
- if (bset)
- bitset_print (stderr, bset, 1);
+ return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_OR_AND);
}
-/* Release memory associated with bitsets. */
+/* Function to be called from debugger to print bitset. */
void
-bitset_release_memory ()
+debug_bitset (bitset bset)
{
- lbitset_release_memory ();
- ebitset_release_memory ();
+ if (bset)
+ bitset_print (stderr, bset, true);
}
projects / bison.git / blobdiff