xref: /freebsd/contrib/ntp/libntp/uglydate.c (revision f5f40dd63bc7acbb5312b26ac1ea1103c12352a6)
1c0b746e5SOllivier Robert /*
2c0b746e5SOllivier Robert  * uglydate - convert a time stamp to something barely readable
3c0b746e5SOllivier Robert  *	      The string returned is 37 characters long.
4c0b746e5SOllivier Robert  */
5*2b15cb3dSCy Schubert #include <config.h>
6c0b746e5SOllivier Robert #include <stdio.h>
7c0b746e5SOllivier Robert 
8c0b746e5SOllivier Robert #include "ntp_fp.h"
9c0b746e5SOllivier Robert #include "ntp_unixtime.h"
10c0b746e5SOllivier Robert #include "ntp_stdlib.h"
11224ba2bdSOllivier Robert 
12c0b746e5SOllivier Robert 
13c0b746e5SOllivier Robert char *
14c0b746e5SOllivier Robert uglydate(
15c0b746e5SOllivier Robert 	l_fp *ts
16c0b746e5SOllivier Robert 	)
17c0b746e5SOllivier Robert {
18c0b746e5SOllivier Robert 	char *bp;
19c0b746e5SOllivier Robert 	char *timep;
20c0b746e5SOllivier Robert 	struct tm *tm;
21c0b746e5SOllivier Robert 	time_t sec;
22c0b746e5SOllivier Robert 	long msec;
23c0b746e5SOllivier Robert 	int year;
24c0b746e5SOllivier Robert 
25c0b746e5SOllivier Robert 	timep = ulfptoa(ts, 6);		/* returns max 17 characters */
26c0b746e5SOllivier Robert 	LIB_GETBUF(bp);
27c0b746e5SOllivier Robert 	sec = ts->l_ui - JAN_1970;
28c0b746e5SOllivier Robert 	msec = ts->l_uf / 4294967;	/* fract / (2**32/1000) */
29c0b746e5SOllivier Robert 	tm = gmtime(&sec);
30c0b746e5SOllivier Robert 	if (ts->l_ui == 0) {
31c0b746e5SOllivier Robert 		/*
32c0b746e5SOllivier Robert 		 * Probably not a real good thing to do.  Oh, well.
33c0b746e5SOllivier Robert 		 */
34c0b746e5SOllivier Robert 		year = 0;
35c0b746e5SOllivier Robert 		tm->tm_yday = 0;
36c0b746e5SOllivier Robert 		tm->tm_hour = 0;
37c0b746e5SOllivier Robert 		tm->tm_min = 0;
38c0b746e5SOllivier Robert 		tm->tm_sec = 0;
39c0b746e5SOllivier Robert 	} else {
40c0b746e5SOllivier Robert 		year = tm->tm_year;
41c0b746e5SOllivier Robert 		while (year >= 100)
42c0b746e5SOllivier Robert 		    year -= 100;
43c0b746e5SOllivier Robert 	}
44*2b15cb3dSCy Schubert 	snprintf(bp, LIB_BUFLENGTH,
45*2b15cb3dSCy Schubert 		 "%17s %02d:%03d:%02d:%02d:%02d.%03ld", timep, year,
46*2b15cb3dSCy Schubert 		 tm->tm_yday, tm->tm_hour, tm->tm_min, tm->tm_sec,
47*2b15cb3dSCy Schubert 		 msec);
48*2b15cb3dSCy Schubert 
49c0b746e5SOllivier Robert 	return bp;
50c0b746e5SOllivier Robert }
51