source: trunk/minix/lib/ansi/asctime.c@ 15

/*
 * asctime - print a date
 */
/* $Header: /cvsup/minix/src/lib/ansi/asctime.c,v 1.1.1.1 2005/04/21 14:56:04 beng Exp $ */

#include        <string.h>
#include        <time.h>
#include        "loc_time.h"

#define DATE_STR        "??? ??? ?? ??:??:?? ????\n"

static char *
two_digits(register char *pb, int i, int nospace)
{
        *pb = (i / 10) % 10 + '0';
        if (!nospace && *pb == '0') *pb = ' ';
        pb++;
        *pb++ = (i % 10) + '0';
        return ++pb;
}

static char *
four_digits(register char *pb, int i)
{
        i %= 10000;
        *pb++ = (i / 1000) + '0';
        i %= 1000;
        *pb++ = (i / 100) + '0';
        i %= 100;
        *pb++ = (i / 10) + '0';
        *pb++ = (i % 10) + '0';
        return ++pb;
}

char *asctime(const struct tm *timeptr)
{
        static char buf[26];
        register char *pb = buf;
        register const char *ps;
        register int n;

        strcpy(pb, DATE_STR);
        ps = _days[timeptr->tm_wday];
        n = ABB_LEN;
        while(--n >= 0) *pb++ = *ps++;
        pb++;
        ps = _months[timeptr->tm_mon];
        n = ABB_LEN;
        while(--n >= 0) *pb++ = *ps++;
        pb++;
        pb = two_digits(
                    two_digits(
                            two_digits(two_digits(pb, timeptr->tm_mday, 0)
                                        , timeptr->tm_hour, 1)
                            , timeptr->tm_min, 1)
                    , timeptr->tm_sec, 1);

        four_digits(pb, timeptr->tm_year + 1900);
        return buf;
}