1 /*
2  * Print time_t and nanoseconds in symbolic format.
3  *
4  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include "tests.h"
31 #include <stdio.h>
32 #include <time.h>
33 
34 static void
35 print_time_t_ex(const time_t t, const unsigned long long part_sec,
36 		const unsigned int max_part_sec, const int width,
37 		const int comment)
38 {
39 
40 	if ((!t && !part_sec) || part_sec > max_part_sec)
41 		return;
42 
43 	const struct tm *const p = localtime(&t);
44 	char buf[256];
45 	if (!p || !strftime(buf, sizeof(buf), "%FT%T", p))
46 		return;
47 
48 	if (comment)
49 		fputs(" /* ", stdout);
50 
51 	fputs(buf, stdout);
52 
53 	if (part_sec)
54 		printf(".%0*llu", width, part_sec);
55 
56 	if (strftime(buf, sizeof(buf), "%z", p))
57 		fputs(buf, stdout);
58 
59 	if (comment)
60 		fputs(" */", stdout);
61 }
62 
63 void
64 print_time_t_nsec(const time_t t, const unsigned long long nsec, int comment)
65 {
66 	print_time_t_ex(t, nsec, 999999999, 9, comment);
67 }
68 
69 void
70 print_time_t_usec(const time_t t, const unsigned long long usec, int comment)
71 {
72 	print_time_t_ex(t, usec, 999999, 6, comment);
73 }
74