contrib/ntp/libntp/prettydate.c

   1 /*
   2  * prettydate - convert a time stamp to something readable
   3  */
   4 #include <stdio.h>
   5
   6 #include "ntp_fp.h"
   7 #include "ntp_unixtime.h"       /* includes <sys/time.h> */
   8 #include "lib_strbuf.h"
   9 #include "ntp_stdlib.h"
  10
  11 static const char *months[] = {
  12   "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  13   "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  14 };
  15
  16 static const char *days[] = {
  17   "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  18 };
  19
  20 char *
  21 prettydate(
  22         l_fp *ts
  23         )
  24 {
  25         char *bp;
  26         struct tm *tm;
  27         time_t sec;
  28         u_long msec;
  29
  30         LIB_GETBUF(bp);
  31
  32         sec = ts->l_ui - JAN_1970;
  33         msec = ts->l_uf / 4294967;      /* fract / (2 ** 32 / 1000) */
  34
  35         tm = localtime(&sec);
  36
  37         (void) sprintf(bp, "%08lx.%08lx  %s, %s %2d %4d %2d:%02d:%02d.%03lu",
  38                        (u_long)ts->l_ui, (u_long)ts->l_uf, days[tm->tm_wday],
  39                        months[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year,
  40                        tm->tm_hour,tm->tm_min, tm->tm_sec, msec);
  41
  42         return bp;
  43 }
  44
  45 char *
  46 gmprettydate(
  47         l_fp *ts
  48         )
  49 {
  50         char *bp;
  51         struct tm *tm;
  52         time_t sec;
  53         u_long msec;
  54
  55         LIB_GETBUF(bp);
  56
  57         sec = ts->l_ui - JAN_1970;
  58         msec = ts->l_uf / 4294967;      /* fract / (2 ** 32 / 1000) */
  59
  60         tm = gmtime(&sec);
  61
  62         (void) sprintf(bp, "%08lx.%08lx  %s, %s %2d %4d %2d:%02d:%02d.%03lu UTC",
  63                        (u_long)ts->l_ui, (u_long)ts->l_uf, days[tm->tm_wday],
  64                        months[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year,
  65                        tm->tm_hour,tm->tm_min, tm->tm_sec, msec);
  66
  67         return bp;
  68 }