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 <config.h>
   6 #include <stdio.h>
   7
   8 #include "ntp_fp.h"
   9 #include "ntp_unixtime.h"
  10 #include "lib_strbuf.h"
  11 #include "ntp_stdlib.h"
  12
  13
  14 char *
  15 uglydate(
  16         l_fp *ts
  17         )
  18 {
  19         char *bp;
  20         char *timep;
  21         struct tm *tm;
  22         time_t sec;
  23         long msec;
  24         int year;
  25
  26         timep = ulfptoa(ts, 6);         /* returns max 17 characters */
  27         LIB_GETBUF(bp);
  28         sec = ts->l_ui - JAN_1970;
  29         msec = ts->l_uf / 4294967;      /* fract / (2**32/1000) */
  30         tm = gmtime(&sec);
  31         if (ts->l_ui == 0) {
  32                 /*
  33                  * Probably not a real good thing to do.  Oh, well.
  34                  */
  35                 year = 0;
  36                 tm->tm_yday = 0;
  37                 tm->tm_hour = 0;
  38                 tm->tm_min = 0;
  39                 tm->tm_sec = 0;
  40         } else {
  41                 year = tm->tm_year;
  42                 while (year >= 100)
  43                     year -= 100;
  44         }
  45         snprintf(bp, LIB_BUFLENGTH,
  46                  "%17s %02d:%03d:%02d:%02d:%02d.%03ld", timep, year,
  47                  tm->tm_yday, tm->tm_hour, tm->tm_min, tm->tm_sec,
  48                  msec);
  49
  50         return bp;
  51 }