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/* $Id: topsong.c,v 1.5 2002/07/21 09:26:02 in2 Exp $ */
#include "bbs.h"

#define MAX_SONGS 300
#define QCAST     int (*)(const void *, const void *)

typedef struct songcmp_t {
    char            name[100];
    char            cname[100];
    long int        count;
}               songcmp_t;

static long int totalcount = 0;

static int
count_cmp(songcmp_t * b, songcmp_t * a)
{
    return (a->count - b->count);
}

int
topsong()
{
    more(FN_TOPSONG, YEA);
    return 0;
}

static int
strip_blank(char *cbuf, char *buf)
{
    for (; *buf; buf++)
    if (*buf != ' ')
        *cbuf++ = *buf;
    *cbuf = 0;
    return 0;
}

void
sortsong()
{
    FILE           *fo, *fp = fopen(BBSHOME "/" FN_USSONG, "r");
    songcmp_t       songs[MAX_SONGS + 1];
    int             n;
    char            buf[256], cbuf[256];

    memset(songs, 0, sizeof(songs));
    if (!fp)
    return;
    if (!(fo = fopen(FN_TOPSONG, "w"))) {
    fclose(fp);
    return;
    }
    totalcount = 0;
    while (fgets(buf, 200, fp)) {
    strtok(buf, "\n\r");
    strip_blank(cbuf, buf);
    if (!cbuf[0] || !isprint2(cbuf[0]))
        continue;

    for (n = 0; n < MAX_SONGS && songs[n].name[0]; n++)
        if (!strcmp(songs[n].cname, cbuf))
        break;
    strlcpy(songs[n].name, buf, sizeof(songs[n].name));
    strlcpy(songs[n].cname, cbuf, sizeof(songs[n].cname));
    songs[n].count++;
    totalcount++;
    }
    qsort(songs, MAX_SONGS, sizeof(songcmp_t), (QCAST) count_cmp);
    fprintf(fo,
        "    \033[36m──\033[37m名次\033[36m──────\033[37m歌"
        "  名\033[36m───────────\033[37m次數\033[36m"
        "──\033[32m共%ld次\033[36m──\033[m\n", totalcount);
    for (n = 0; n < 100 && songs[n].name[0]; n++) {
    fprintf(fo, "      %5d. %-38.38s %4ld \033[32m[%.2f]\033[m\n", n + 1,
        songs[n].name, songs[n].count,
        (float)songs[n].count / totalcount);
    }
    fclose(fp);
    fclose(fo);
}