#include <stdlib.h>
#include "bitset.h"
-#include "sbitset.h"
+#include "abitset.h"
#include "lbitset.h"
#include "ebitset.h"
+#include "bitset_stats.h"
#include "obstack.h"
static void bitset_print PARAMS ((FILE *, bitset, int));
-#if BITSET_STATS
-#define BITSET_STATS_FILE "bitset.dat"
-
-#define BITSET_LOG_COUNT_BINS 10
-#define BITSET_LOG_SIZE_BINS 16
-#define BITSET_DENSITY_BINS 20
-
-struct bitset_type_stats_struct
-{
- unsigned int xmallocs;
- unsigned int xfrees;
- unsigned int oballocs;
- unsigned int obfrees;
- unsigned int lists;
- unsigned int list_counts[BITSET_LOG_COUNT_BINS];
- unsigned int list_sizes[BITSET_LOG_SIZE_BINS];
- unsigned int list_density[BITSET_DENSITY_BINS];
-};
-
-struct bitset_stats_struct
-{
- unsigned int runs;
- struct bitset_type_stats_struct types[BITSET_TYPE_NUM];
-};
-
-struct bitset_stats_struct bitset_stats_data;
-struct bitset_stats_struct *bitset_stats;
-
-static void bitset_percent_histogram_print PARAMS ((FILE *, const char *,
- const char *,
- unsigned int,
- unsigned int *));
-static void bitset_log_histogram_print PARAMS ((FILE *, const char *,
- const char *,
- unsigned int,
- unsigned int *));
-static void bitset_stats_print_1
-PARAMS ((FILE *, const char *, struct bitset_type_stats_struct *));
-static void bitset_stats_print PARAMS ((FILE *, int));
-static void bitset_stats_read PARAMS ((void));
-static void bitset_stats_write PARAMS ((void));
-
-#define BITSET_STATS_XMALLOCS_INC(TYPE) \
- if (bitset_stats) \
- bitset_stats->types[(TYPE)].xmallocs++
-
-#define BITSET_STATS_XFREES_INC(BSET) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].xfrees++
-
-#define BITSET_STATS_OBALLOCS_INC(TYPE) \
- if (bitset_stats) \
- bitset_stats->types[(TYPE)].oballocs++
-
-#define BITSET_STATS_OBFREES_INC(BSET) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].obfrees++
-
-#define BITSET_STATS_LISTS_INC(BSET) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].lists++
-
-#define BITSET_STATS_LIST_COUNTS_INC(BSET, I) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].list_counts[(I)]++
-
-#define BITSET_STATS_LIST_SIZES_INC(BSET, I) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].list_sizes[(I)]++
-
-#define BITSET_STATS_LIST_DENSITY_INC(BSET, I) \
- if (bitset_stats) \
- bitset_stats->types[BITSET_TYPE_ (BSET)].list_density[(I)]++
-
-#else
-#define BITSET_STATS_XMALLOCS_INC(TYPE)
-
-#define BITSET_STATS_XFREES_INC(BSET)
-
-#define BITSET_STATS_OBALLOCS_INC(TYPE)
-
-#define BITSET_STATS_OBFREES_INC(BSET)
-
-#define BITSET_STATS_LISTS_INC(BSET)
-
-#define BITSET_STATS_LIST_COUNTS_INC(BSET, I)
-
-#define BITSET_STATS_LIST_SIZES_INC(BSET, I)
-
-#define BITSET_STATS_LIST_DENSITY_INC(BSET, I)
-#endif /* BITSET_STATS */
-
/* Return number of bytes required to create a N_BIT bitset
of TYPE. The bitset may grow to require more bytes than this. */
{
unsigned int bytes;
+ if (bitset_stats_enabled)
+ return bitset_stats_bytes ();
+
switch (type)
{
case BITSET_ARRAY:
- bytes = sbitset_bytes (n_bits);
+ bytes = abitset_bytes (n_bits);
break;
case BITSET_LIST:
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:
- return sbitset_init (bset, n_bits);
+ return abitset_init (bset, n_bits);
case BITSET_LIST:
return lbitset_init (bset, n_bits);
{
enum bitset_type type;
-#if BITSET_CHECK
/* Check attributes. */
if (attr & BITSET_FIXED && attr & BITSET_VARIABLE)
abort ();
/* Note that sometimes we will be asked for a zero length
fixed size bitset. */
-#endif
/* Choose the type of bitset. */
unsigned int bytes;
bitset bset;
- BITSET_STATS_XMALLOCS_INC (type);
-
bytes = bitset_bytes (type, n_bits);
bset = (bitset) xcalloc (1, bytes);
/* The cache is disabled until some elements are allocated. If we
- have variable length arrays, then we may need to allocate dummy
+ have variable length arrays, then we may need to allocate a dummy
element. */
return bitset_init (bset, n_bits, type);
unsigned int bytes;
bitset bset;
- BITSET_STATS_OBALLOCS_INC (type);
-
bytes = bitset_bytes (type, n_bits);
bset = obstack_alloc (bobstack, bytes);
bitset_free (bset)
bitset bset;
{
- BITSET_STATS_XFREES_INC (bset);
-
BITSET_FREE_ (bset);
free (bset);
}
bitset_obstack_free (bset)
bitset bset;
{
- BITSET_STATS_OBFREES_INC (bset);
-
BITSET_FREE_ (bset);
}
+/* Return bitset type. */
+enum bitset_type
+bitset_type_get (bset)
+ bitset bset;
+{
+ enum bitset_type type;
+
+ type = BITSET_TYPE_ (bset);
+ if (type != BITSET_STATS)
+ return type;
+
+ return bitset_stats_type_get (bset);
+}
+
+
/* Find next bit set in SRC starting from and including BITNO.
Return -1 if SRC empty. */
int
}
+/* Return non-zero if BITNO in SRC is the only set bit. */
+int
+bitset_only_set_p (src, bitno)
+ bitset src;
+ bitset_bindex bitno;
+{
+ bitset_bindex val[2];
+ bitset_bindex next = 0;
+
+ if (bitset_list (src, val, 2, &next) != 1)
+ return 0;
+ 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)
int verbose;
{
unsigned int i, pos;
+ bitset_iterator iter;
if (verbose)
fprintf (file, "n_bits = %d, set = {", bitset_size (bset));
pos = 30;
- BITSET_EXECUTE (bset, 0, i,
+ BITSET_FOR_EACH (iter, bset, i, 0)
{
if (pos > 70)
{
fprintf (file, "%d ", i);
pos += 1 + (i >= 10) + (i >= 100);
- });
+ };
if (verbose)
fprintf (file, "}\n");
bitset src;
{
unsigned int i;
+ bitset_iterator iter;
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_EXECUTE (src, 0, i,
+ BITSET_FOR_EACH (iter, src, i, 0)
{
bitset_set (dst, i);
- });
+ };
return 1;
}
int num;
int 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. */
+
next = 0;
for (count = 0; (num = bitset_list (src, list, BITSET_LIST_SIZE, &next));
count += num)
bitset dst;
bitset src;
{
- BITSET_CHECK2_ (dst, src);
return BITSET_SUBSET_P_ (dst, src);
}
bitset dst;
bitset src;
{
- BITSET_CHECK2_ (dst, src);
return BITSET_EQUAL_P_ (dst, src);
}
bitset dst;
bitset src;
{
- BITSET_CHECK2_ (dst, src);
return BITSET_DISJOINT_P_ (dst, src);
}
bitset dst;
bitset src;
{
- BITSET_CHECK2_ (dst, src);
return BITSET_NOT_ (dst, src);
}
bitset src1;
bitset src2;
{
- BITSET_CHECK3_ (dst, src1, src2);
return BITSET_OR_ (dst, src1, src2);
}
bitset src1;
bitset src2;
{
- BITSET_CHECK3_ (dst, src1, src2);
return BITSET_AND_ (dst, src1, src2);
}
bitset src1;
bitset src2;
{
- BITSET_CHECK3_ (dst, src1, src2);
return BITSET_XOR_ (dst, src1, src2);
}
bitset src1;
bitset src2;
{
- BITSET_CHECK3_ (dst, src1, src2);
return BITSET_ANDN_ (dst, src1, src2);
}
-/* DST = SRC1 | ~SRC2. Return non-zero if DST != SRC1 | ~SRC2. */
-int
-bitset_orn (dst, src1, src2)
- bitset dst;
- bitset src1;
- bitset src2;
-{
- BITSET_CHECK3_ (dst, src1, src2);
- return BITSET_ORN_ (dst, src1, src2);
-}
-
-
+/* This is a fallback for implementations that do not support
+ four operand operations. */
int
bitset_op4 (dst, src1, src2, src3, op)
bitset dst;
bitset tmp;
/* Create temporary bitset. */
- tmp = bitset_alloc (BITSET_TYPE_ (dst), 0);
+ tmp = bitset_alloc (0, bitset_type_get (dst));
switch (op)
{
bitset src2;
bitset src3;
{
- BITSET_CHECK4_ (dst, src1, src2, src3);
return BITSET_OR_AND_ (dst, src1, src2, src3);
}
bitset src2;
bitset src3;
{
- BITSET_CHECK4_ (dst, src1, src2, src3);
return BITSET_AND_OR_ (dst, src1, src2, src3);
}
bitset src2;
bitset src3;
{
- BITSET_CHECK4_ (dst, src1, src2, src3);
return BITSET_ANDN_OR_ (dst, src1, src2, src3);
}
lbitset_release_memory ();
ebitset_release_memory ();
}
-
-
-#if BITSET_STATS
-int
-bitset_list (bset, list, num, next)
- bitset bset;
- bitset_bindex *list;
- bitset_bindex num;
- bitset_bindex *next;
-{
- bitset_bindex count;
-
- count = BITSET_LIST_ (bset, list, num, next);
-
- if (bitset_stats)
- {
- bitset_bindex tmp;
- bitset_bindex size;
- bitset_bindex i;
- enum bitset_type type;
-
- type = BITSET_TYPE_ (bset);
- BITSET_STATS_LISTS_INC (bset);
-
- /* Log histogram of number of set bits. */
- for (i = 0, tmp = count; tmp; tmp >>= 1, i++)
- continue;
- if (i >= BITSET_LOG_COUNT_BINS)
- i = BITSET_LOG_COUNT_BINS - 1;
- BITSET_STATS_LIST_COUNTS_INC (bset, i);
-
- /* Log histogram of number of bits in set. */
- size = bitset_size (bset);
- for (i = 0, tmp = size; tmp; tmp >>= 1, i++)
- continue;
- if (i >= BITSET_LOG_SIZE_BINS)
- i = BITSET_LOG_SIZE_BINS - 1;
- BITSET_STATS_LIST_SIZES_INC (bset, i);
-
- /* Histogram of fraction of bits set. */
- i = size ? (count * BITSET_DENSITY_BINS) / size : 0;
- if (i >= BITSET_DENSITY_BINS)
- i = BITSET_DENSITY_BINS - 1;
- BITSET_STATS_LIST_DENSITY_INC (bset, i);
- }
- return count;
-}
-
-
-/* Print a percentage histogram with message MSG to FILE. */
-static void
-bitset_percent_histogram_print (file, name, msg, n_bins, bins)
- FILE *file;
- const char *name;
- const char *msg;
- unsigned int n_bins;
- unsigned int *bins;
-{
- unsigned int i;
- unsigned int total;
-
- total = 0;
- for (i = 0; i < n_bins; i++)
- total += bins[i];
-
- if (!total)
- return;
-
- fprintf (file, "%s %s", name, msg);
- for (i = 0; i < n_bins; i++)
- fprintf (file, "%.0f-%.0f%%\t%8d (%5.1f%%)\n",
- i * 100.0 / n_bins,
- (i + 1) * 100.0 / n_bins, bins[i],
- (100.0 * bins[i]) / total);
-}
-
-
-/* Print a log histogram with message MSG to FILE. */
-static void
-bitset_log_histogram_print (file, name, msg, n_bins, bins)
- FILE *file;
- const char *name;
- const char *msg;
- unsigned int n_bins;
- unsigned int *bins;
-{
- unsigned int i;
- unsigned int total;
- unsigned int max_width;
-
- total = 0;
- for (i = 0; i < n_bins; i++)
- total += bins[i];
-
- if (!total)
- return;
-
- /* 2 * ceil (log10(2) * (N - 1)) + 1 */
- max_width = 2 * (unsigned int) (0.30103 * (n_bins - 1) + 0.9999) + 1;
-
- fprintf (file, "%s %s", name, msg);
- for (i = 0; i < 2; i++)
- fprintf (file, "%*d\t%8d (%5.1f%%)\n",
- max_width, i, bins[i], 100.0 * bins[i] / total);
-
- /* Perhaps we should bail out once the histogram goes to zero. */
- for (; i < n_bins; i++)
- fprintf (file, "%*d-%d\t%8d (%5.1f%%)\n",
- max_width - ((unsigned int) (0.30103 * (i) + 0.9999) + 1),
- 1 << (i - 1), (1 << i) - 1, bins[i],
- (100.0 * bins[i]) / total);
-}
-
-
-/* Print bitset statistics to FILE. */
-static void
-bitset_stats_print_1 (file, name, stats)
- FILE *file;
- const char *name;
- struct bitset_type_stats_struct *stats;
-{
- if (!stats)
- return;
-
- fprintf (file, "%d %ss xmalloced, %d freed.\n",
- stats->xmallocs, name, stats->xfrees);
- fprintf (file, "%d %ss oballoced, %d freed.\n",
- stats->oballocs, name, stats->obfrees);
-
- fprintf (file, "%d bitset_lists\n", stats->lists);
-
- bitset_log_histogram_print (file, name, "count log histogram\n",
- BITSET_LOG_COUNT_BINS, stats->list_counts);
-
- bitset_log_histogram_print (file, name, "size log histogram\n",
- BITSET_LOG_SIZE_BINS, stats->list_sizes);
-
- bitset_percent_histogram_print (file, name, "density histogram\n",
- BITSET_DENSITY_BINS, stats->list_density);
-}
-
-
-/* Print all bitset statistics to FILE. */
-static void
-bitset_stats_print (file, verbose)
- FILE *file;
- int verbose ATTRIBUTE_UNUSED;
-{
- int i;
- static const char *names[] = BITSET_TYPE_NAMES;
-
- if (!bitset_stats)
- return;
-
- fprintf (file, "Bitset statistics:\n\n");
-
- if (bitset_stats->runs > 1)
- fprintf (file, "Accumulated runs = %d\n", bitset_stats->runs);
-
- for (i = 0; i < BITSET_TYPE_NUM; i++)
- bitset_stats_print_1 (file, names[i], &bitset_stats->types[i]);
-}
-#endif /* BITSET_STATS */
-
-
-/* Initialise bitset statistics logging. */
-void
-bitset_stats_init ()
-{
-#if BITSET_STATS
- bitset_stats = &bitset_stats_data;
- bitset_stats_read ();
-#endif /* BITSET_STATS */
-}
-
-
-/* Read bitset statistics file. */
-static void
-bitset_stats_read ()
-{
- FILE *file;
-
- if (!bitset_stats)
- return;
-
- file = fopen (BITSET_STATS_FILE, "r");
- if (file)
- {
- if (fread (&bitset_stats_data, sizeof (bitset_stats_data),
- 1, file) != 1)
- {
- if (ferror (file))
- perror ("Could not read stats file.");
- else
- fprintf (stderr, "Bad stats file size.\n");
- }
- fclose (file);
- }
- bitset_stats_data.runs++;
-}
-
-
-/* Write bitset statistics file. */
-static void
-bitset_stats_write ()
-{
- FILE *file;
-
- if (!bitset_stats)
- return;
-
- file = fopen (BITSET_STATS_FILE, "w");
- if (file)
- {
- if (fwrite (&bitset_stats_data, sizeof (bitset_stats_data),
- 1, file) != 1)
- perror ("Could not write stats file.");
- fclose (file);
- }
- else
- perror ("Could not open stats file for writing.");
-}
-
-
-/* Dump bitset statistics to FILE. */
-void
-bitset_stats_dump (file)
- FILE *file;
-{
-#if BITSET_STATS
- bitset_stats_print (file, 0);
- bitset_stats_write ();
-#endif /* BITSET_STATS */
-}
-
-
-/* Function to be called from debugger to print bitset stats. */
-void
-debug_bitset_stats (void)
-{
-#if BITSET_STATS
- bitset_stats_print (stderr, 1);
-#endif /* BITSET_STATS */
-}
projects / bison.git / blobdiff