minor rewording, no fixes

[unix-history] / usr / src / usr.bin / w / pr_time.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)pr_time.c   5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <string.h>

#define HR      (60 * 60)
#define DAY     (24 * HR)
#define MON     (30 * DAY)

static time_t now;
/*
* prttime prints a time in hours and minutes or minutes and seconds.
* The character string tail is printed at the end, obvious
* strings to pass are "", " ", or "am".
*/
static char *
prttime(tim, tail)
       time_t tim;
       char *tail;
{
       int mins;
       static char timebuf[32];

       if (tim >= 60) {
               mins = tim % 60;
               (void) sprintf(timebuf, "%2d:%02d%s", (int)(tim / 60), mins,
                   tail);
       } else if (tim >= 0)
               (void) sprintf(timebuf, "    %2d%s", (int)tim, tail);
       else
               (void) strcpy(timebuf, tail);

       return (timebuf);
}

static char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
               "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };

/* prtat prints a 12 hour time given a pointer to a time of day */
char *
attime(started)
       time_t *started;
{
       struct tm *p;
       register int hr, pm;
       static char prbuff[64];

       if (now == 0)
               (void) time(&now);
       p = localtime(started);
       hr = p->tm_hour;
       pm = (hr > 11);
       if (hr > 11)
               hr -= 12;
       if (hr == 0)
               hr = 12;
       if (now - *started <= 18 * HR)
               return (prttime((time_t)hr * 60 + p->tm_min, pm ? "pm" : "am"));
       if (now - *started <= 7 * DAY)
               (void) sprintf(prbuff, "%*s%d%s", hr < 10 ? 4 : 3,
                       weekday[p->tm_wday], hr, pm ? "pm" : "am");
       else
               (void) sprintf(prbuff, "%2d%s%2d", p->tm_mday,
                       month[p->tm_mon], p->tm_year);

       return (prbuff);
}