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/* 単語の頻度を計算する */
#include <stdlib.h>
#include "mkdic.h"
static int
count_nr_words(struct yomi_entry_list *yl)
{
int nr = 0;
struct yomi_entry *ye;
for (ye = yl->head; ye; ye = ye->next) {
nr += ye->nr_entries;
}
return nr;
}
static struct word_entry **
make_word_array(struct yomi_entry_list *yl, int nr)
{
struct word_entry **array = malloc(sizeof(struct word_entry *) *
nr);
int nth = 0;
struct yomi_entry *ye;
for (ye = yl->head; ye; ye = ye->next) {
int i;
for (i = 0; i < ye->nr_entries; i++) {
array[nth] = &ye->entries[i];
nth ++;
}
}
return array;
}
/** qsort用の比較関数 */
static int
compare_word_entry_by_freq(const void *p1, const void *p2)
{
const struct word_entry * const *e1 = p1;
const struct word_entry * const *e2 = p2;
return abs((*e2)->raw_freq) - abs((*e1)->raw_freq);
}
static void
set_freq(struct word_entry **array, int nr)
{
int i;
int percent = nr / 100;
for (i = 0; i < nr; i++) {
struct word_entry *we = array[i];
we->freq = 99 - (i / percent);
if (we->freq < 1) {
we->freq = 1;
}
we->freq *= 100;
we->freq -= we->source_order;
if (we->raw_freq < 0) {
we->freq *= -1;
}
}
}
void
calc_freq(struct yomi_entry_list *yl)
{
int nr;
struct word_entry **we;
/**/
nr = count_nr_words(yl);
we = make_word_array(yl, nr);
/**/
qsort(we, nr,
sizeof(struct word_entry *),
compare_word_entry_by_freq);
set_freq(we, nr);
/**/
free(we);
}
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