contrib/ntp/libntp/uglydate.c

   1 /*
   2  * uglydate - convert a time stamp to something barely readable
   3  *            The string returned is 37 characters long.
   4  */
   5 #include <stdio.h>
   6
   7 #include "ntp_fp.h"
   8 #include "ntp_unixtime.h"
   9 #include "lib_strbuf.h"
  10 #include "ntp_stdlib.h"
  11
  12
  13 char *
  14 uglydate(
  15         l_fp *ts
  16         )
  17 {
  18         char *bp;
  19         char *timep;
  20         struct tm *tm;
  21         time_t sec;
  22         long msec;
  23         int year;
  24
  25         timep = ulfptoa(ts, 6);         /* returns max 17 characters */
  26         LIB_GETBUF(bp);
  27         sec = ts->l_ui - JAN_1970;
  28         msec = ts->l_uf / 4294967;      /* fract / (2**32/1000) */
  29         tm = gmtime(&sec);
  30         if (ts->l_ui == 0) {
  31                 /*
  32                  * Probably not a real good thing to do.  Oh, well.
  33                  */
  34                 year = 0;
  35                 tm->tm_yday = 0;
  36                 tm->tm_hour = 0;
  37                 tm->tm_min = 0;
  38                 tm->tm_sec = 0;
  39         } else {
  40                 year = tm->tm_year;
  41                 while (year >= 100)
  42                     year -= 100;
  43         }
  44         (void) sprintf(bp, "%17s %02d:%03d:%02d:%02d:%02d.%03ld",
  45                        timep, year, tm->tm_yday, tm->tm_hour, tm->tm_min,
  46                        tm->tm_sec, msec);
  47         return bp;
  48 }