gen/common/asctime.c

	asctime.c revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
 * Copyright 1987 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*LINTLIBRARY*/

#include <time.h>
#include <tzfile.h>

static  char    cbuf[26];

static char *ct_numb(char *, int);

char *
asctime(struct tm *t)
{
    char *cp, *ncp;
    int *tp;

    cp = cbuf;
    for (ncp = "Day Mon 00 00:00:00 1900\n"; *cp++ = *ncp++;);
    ncp = &"SunMonTueWedThuFriSat"[3*t->tm_wday];
    cp = cbuf;
    *cp++ = *ncp++;
    *cp++ = *ncp++;
    *cp++ = *ncp++;
    cp++;
    tp = &t->tm_mon;
    ncp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[(*tp)*3];
    *cp++ = *ncp++;
    *cp++ = *ncp++;
    *cp++ = *ncp++;
    cp = ct_numb(cp, *--tp);
    cp = ct_numb(cp, *--tp+100);
    cp = ct_numb(cp, *--tp+100);
    cp = ct_numb(cp, *--tp+100);
    cp = ct_numb(cp, (t->tm_year + TM_YEAR_BASE)/100);
    cp--;
    cp = ct_numb(cp, t->tm_year+100);
    return (cbuf);
}

static char *
ct_numb(char *cp, int n)
{
    cp++;
    if (n>=10)
        *cp++ = (n/10)%10 + '0';
    else
        *cp++ = ' ';
    *cp++ = n%10 + '0';
    return (cp);
}