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#include "config.h"
#include <cdt/dthdr.h>
#include <stdlib.h>
/* Get statistics of a dictionary
**
** Written by Kiem-Phong Vo (5/25/96)
*/
static void dttstat(Dtstat_t *ds, Dtlink_t *root, size_t depth, size_t *level) {
if (root->left)
dttstat(ds, root->left, depth + 1, level);
if (root->right)
dttstat(ds, root->right, depth + 1, level);
if (depth > ds->dt_n)
ds->dt_n = depth;
if (level)
level[depth] += 1;
}
static void dthstat(Dtdata_t data, Dtstat_t *ds, size_t *count) {
for (int h = data.ntab - 1; h >= 0; --h) {
size_t n = 0;
for (Dtlink_t *t = data.htab[h]; t; t = t->right)
n += 1;
if (count)
count[n] += 1;
else if (n > 0) {
ds->dt_n += 1;
if (n > ds->dt_max)
ds->dt_max = n;
}
}
}
int dtstat(Dt_t *dt, Dtstat_t *ds, int all) {
static size_t *Count;
UNFLATTEN(dt);
ds->dt_n = ds->dt_max = 0;
ds->dt_count = NULL;
ds->dt_size = dtsize(dt);
ds->dt_meth = dt->data.type & DT_METHODS;
if (!all)
return 0;
if (dt->data.type & DT_SET) {
dthstat(dt->data, ds, NULL);
free(Count);
if (!(Count = calloc(ds->dt_max + 1, sizeof(size_t))))
return -1;
dthstat(dt->data, ds, Count);
} else if (dt->data.type & (DT_OSET | DT_OBAG)) {
if (dt->data.here) {
dttstat(ds, dt->data.here, 0, NULL);
free(Count);
if (!(Count = calloc(ds->dt_n + 1, sizeof(size_t))))
return -1;
dttstat(ds, dt->data.here, 0, Count);
for (size_t i = 0; i <= ds->dt_n; ++i)
if (Count[i] > ds->dt_max)
ds->dt_max = Count[i];
}
}
ds->dt_count = Count;
return 0;
}
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