1#include <limits.h>
2#include <stdlib.h>
3#include <string.h>
4#include <time.h>
5#include "test.h"
6
7static char buffer[100];
8
9static void checkStrftime(const char* format, const struct tm* tm,
10		const char* expected) {
11	size_t resultLength = strftime(buffer, sizeof(buffer), format, tm);
12
13	if (resultLength != 0 && strcmp(buffer, expected) != 0) {
14		t_error("\"%s\": expected \"%s\", got \"%s\"\n", format, expected, buffer);
15	} else if (resultLength == 0 && strlen(expected) != 0) {
16		t_error("\"%s\": expected \"%s\", got nothing\n", format, expected);
17	}
18}
19
20static struct tm tm1 = {
21	.tm_sec = 45,
22	.tm_min = 23,
23	.tm_hour = 13,
24	.tm_mday = 3,
25	.tm_mon = 0,
26	.tm_year = 2016 - 1900,
27	.tm_wday = 0,
28	.tm_yday = 2,
29	.tm_isdst = 0
30};
31
32static struct tm tm2 = {
33	.tm_sec = 53,
34	.tm_min = 17,
35	.tm_hour = 5,
36	.tm_mday = 5,
37	.tm_mon = 0,
38	.tm_year = 10009 - 1900,
39	.tm_wday = 1,
40	.tm_yday = 4,
41	.tm_isdst = 0
42};
43
44static struct tm tm3 = {
45	.tm_sec = 0,
46	.tm_min = 0,
47	.tm_hour = 12,
48	.tm_mday = 23,
49	.tm_mon = 1,
50	.tm_year = 0 - 1900,
51	.tm_wday = 3,
52	.tm_yday = 53,
53	.tm_isdst = 0
54};
55
56static struct tm tm4 = {
57	.tm_sec = 0,
58	.tm_min = 0,
59	.tm_hour = 0,
60	.tm_mday = 1,
61	.tm_mon = 0,
62	.tm_year = -123 - 1900,
63	.tm_wday = 1,
64	.tm_yday = 0,
65	.tm_isdst = 0
66};
67
68static struct tm tm5 = {
69	.tm_sec = 0,
70	.tm_min = 0,
71	.tm_hour = 0,
72	.tm_mday = 1,
73	.tm_mon = 0,
74	.tm_year = INT_MAX,
75	.tm_wday = 3,
76	.tm_yday = 0,
77	.tm_isdst = 0
78};
79
80int main() {
81	setenv("TZ", "UTC0", 1);
82
83	checkStrftime("%c", &tm1, "Sun Jan  3 13:23:45 2016");
84	checkStrftime("%c", &tm2, "Mon Jan  5 05:17:53 +10009");
85	checkStrftime("%c", &tm3, "Wed Feb 23 12:00:00 0000");
86
87	// The POSIX.1-2008 standard does not specify the padding character for
88	// "%C". The C standard requires that the number is padded by '0'.
89	// See also http://austingroupbugs.net/view.php?id=1184
90	checkStrftime("%C", &tm1, "20");
91	checkStrftime("%03C", &tm1, "020");
92	checkStrftime("%+3C", &tm1, "+20");
93	checkStrftime("%C", &tm2, "100");
94	checkStrftime("%C", &tm3, "00");
95	checkStrftime("%01C", &tm3, "0");
96
97	checkStrftime("%F", &tm1, "2016-01-03");
98	checkStrftime("%012F", &tm1, "002016-01-03");
99	checkStrftime("%+10F", &tm1, "2016-01-03");
100	checkStrftime("%+11F", &tm1, "+2016-01-03");
101	checkStrftime("%F", &tm2, "+10009-01-05");
102	checkStrftime("%011F", &tm2, "10009-01-05");
103	checkStrftime("%F", &tm3, "0000-02-23");
104	checkStrftime("%01F", &tm3, "0-02-23");
105	checkStrftime("%06F", &tm3, "0-02-23");
106	checkStrftime("%010F", &tm3, "0000-02-23");
107	checkStrftime("%F", &tm4, "-123-01-01");
108	checkStrftime("%011F", &tm4, "-0123-01-01");
109
110	checkStrftime("%g", &tm1, "15");
111	checkStrftime("%g", &tm2, "09");
112
113	checkStrftime("%G", &tm1, "2015");
114	checkStrftime("%+5G", &tm1, "+2015");
115	checkStrftime("%04G", &tm2, "10009");
116
117	checkStrftime("%r", &tm1, "01:23:45 PM");
118	checkStrftime("%r", &tm2, "05:17:53 AM");
119	checkStrftime("%r", &tm3, "12:00:00 PM");
120	checkStrftime("%r", &tm4, "12:00:00 AM");
121
122	// The "%s" specifier was accepted by the Austin Group for the next POSIX.1
123	// revision. See http://austingroupbugs.net/view.php?id=169
124	checkStrftime("%s", &tm1, "1451827425");
125	if (sizeof(time_t) * CHAR_BIT >= 64) {
126		checkStrftime("%s", &tm2, "253686748673");
127	}
128
129	checkStrftime("%T", &tm1, "13:23:45");
130	checkStrftime("%T", &tm2, "05:17:53");
131	checkStrftime("%T", &tm3, "12:00:00");
132	checkStrftime("%T", &tm4, "00:00:00");
133
134	checkStrftime("%U", &tm1, "01");
135	checkStrftime("%U", &tm2, "01");
136	checkStrftime("%U", &tm3, "08");
137
138	checkStrftime("%V", &tm1, "53");
139	checkStrftime("%V", &tm2, "02");
140	checkStrftime("%V", &tm3, "08");
141
142	checkStrftime("%W", &tm1, "00");
143	checkStrftime("%W", &tm2, "01");
144	checkStrftime("%W", &tm3, "08");
145
146	checkStrftime("%x", &tm1, "01/03/16");
147	checkStrftime("%X", &tm1, "13:23:45");
148	checkStrftime("%y", &tm1, "16");
149
150	// There is no standard that explicitly specifies the exact format of "%Y".
151	// The C standard says that "%F" is equivalent to "%Y-%m-%d". The
152	// POSIX.1-2008 standard says that "%F" is equivalent to "%+4Y-%m-%d".
153	// This implies that to conform to both standards "%Y" needs to be
154	// equivalent to "%+4Y".
155	// See also http://austingroupbugs.net/view.php?id=739
156	checkStrftime("%Y", &tm1, "2016");
157	checkStrftime("%05Y", &tm1, "02016");
158	checkStrftime("%+4Y", &tm1, "2016");
159	checkStrftime("%+5Y", &tm1, "+2016");
160	checkStrftime("%Y", &tm2, "+10009");
161	checkStrftime("%05Y", &tm2, "10009");
162	checkStrftime("%Y", &tm3, "0000");
163	checkStrftime("%02Y", &tm3, "00");
164	checkStrftime("%+5Y", &tm3, "+0000");
165	checkStrftime("%Y", &tm4, "-123");
166	checkStrftime("%+4Y", &tm4, "-123");
167	checkStrftime("%+5Y", &tm4, "-0123");
168
169	if (INT_MAX == 0x7FFFFFFF) {
170		// The standard does not specify any range for tm_year, so INT_MAX
171		// should be valid.
172		checkStrftime("%y", &tm5, "47");
173		checkStrftime("%Y", &tm5, "+2147485547");
174		checkStrftime("%011Y", &tm5, "02147485547");
175		if (sizeof(time_t) * CHAR_BIT >= 64) {
176			checkStrftime("%s", &tm5, "67768036160140800");
177		}
178	}
179
180	return t_status;
181}
182