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 #ifndef TM_IN_SYS_TIME
  12 #include <time.h>
  13 #endif
  14
  15 static const char *months[] = {
  16   "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  17   "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  18 };
  19
  20 static const char *days[] = {
  21   "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  22 };
  23
  24 char *
  25 prettydate(
  26         l_fp *ts
  27         )
  28 {
  29         char *bp;
  30         struct tm *tm;
  31         time_t sec;
  32         u_long msec;
  33
  34         LIB_GETBUF(bp);
  35
  36         sec = ts->l_ui - JAN_1970;
  37         msec = ts->l_uf / 4294967;      /* fract / (2 ** 32 / 1000) */
  38
  39         tm = localtime(&sec);
  40
  41         (void) sprintf(bp, "%08lx.%08lx  %s, %s %2d %4d %2d:%02d:%02d.%03lu",
  42                        (u_long)ts->l_ui, (u_long)ts->l_uf, days[tm->tm_wday],
  43                        months[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year,
  44                        tm->tm_hour,tm->tm_min, tm->tm_sec, msec);
  45
  46         return bp;
  47 }
  48
  49 char *
  50 gmprettydate(
  51         l_fp *ts
  52         )
  53 {
  54         char *bp;
  55         struct tm *tm;
  56         time_t sec;
  57         u_long msec;
  58
  59         LIB_GETBUF(bp);
  60
  61         sec = ts->l_ui - JAN_1970;
  62         msec = ts->l_uf / 4294967;      /* fract / (2 ** 32 / 1000) */
  63
  64         tm = gmtime(&sec);
  65
  66         (void) sprintf(bp, "%08lx.%08lx  %s, %s %2d %4d %2d:%02d:%02d.%03lu UTC",
  67                        (u_long)ts->l_ui, (u_long)ts->l_uf, days[tm->tm_wday],
  68                        months[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year,
  69                        tm->tm_hour,tm->tm_min, tm->tm_sec, msec);
  70
  71         return bp;
  72 }