7
time_t xmas2002 = 1040786563ll;
10
// Make sure stime() always fails.
11
printf("stime: %d\n", stime(&xmas2002));
13
// Verify that tzname sets *something*.
15
printf("tzname[0] set: %d\n", strlen(tzname[0]) >= 3);
16
printf("tzname[1] set: %d\n", strlen(tzname[1]) >= 3);
18
// Verify gmtime() creates correct struct.
19
tm_ptr = gmtime(&xmas2002);
20
printf("sec: %d\n", tm_ptr->tm_sec);
21
printf("min: %d\n", tm_ptr->tm_min);
22
printf("hour: %d\n", tm_ptr->tm_hour);
23
printf("day: %d\n", tm_ptr->tm_mday);
24
printf("mon: %d\n", tm_ptr->tm_mon);
25
printf("year: %d\n", tm_ptr->tm_year);
26
printf("wday: %d\n", tm_ptr->tm_wday);
27
printf("yday: %d\n", tm_ptr->tm_yday);
28
printf("dst: %d\n", tm_ptr->tm_isdst);
29
printf("off: %d\n", tm_ptr->tm_gmtoff);
30
printf("zone: %s\n", tm_ptr->tm_zone);
32
// Verify timegm() reverses gmtime.
33
printf("timegm <-> gmtime: %d\n", timegm(tm_ptr) == xmas2002);
35
// Verify gmtime_r() doesn't clobber static data.
39
printf("old year: %d\n", tm_ptr->tm_year);
40
printf("new year: %d\n", tm1.tm_year);
42
printf("old year again: %d\n", tm_ptr->tm_year);
44
// Verify localtime() picks up timezone data.
45
time_t t2 = xmas2002 - 60 * 60 * 24 * 30 * 6;
46
tm_ptr = localtime(&t2);
47
time_t dst_diff = (tm_ptr->tm_isdst == 1) ? tm_ptr->tm_isdst * 60 * 60 : 0;
48
printf("localtime timezone: %d\n", (_timezone + tm_ptr->tm_gmtoff == dst_diff)); // glibc needs
49
printf("localtime daylight: %d\n", _daylight == tm_ptr->tm_isdst); // no prefix "_"s
50
printf("localtime tzname: %d\n", (!strcmp(tzname[0], tm_ptr->tm_zone) ||
51
!strcmp(tzname[1], tm_ptr->tm_zone)));
53
// Verify localtime() and mktime() reverse each other.
54
printf("localtime <-> mktime: %d\n", mktime(localtime(&xmas2002)) == xmas2002);
56
// Verify localtime_r() doesn't clobber static data.
59
localtime_r(&t3, &tm2);
60
printf("localtime_r(1): %d\n", tm2.tm_year != tm_ptr->tm_year);
62
printf("localtime_r(2): %d\n", tm2.tm_year != tm_ptr->tm_year);
64
// Verify time() returns reasonable value (between 2011 and 2030).
67
printf("time: %d\n", t4 > 1309635200ll && t4 < 1893362400ll);
69
// Verify difftime() calculates accurate time difference.
70
time_t t5 = 1309635200ll;
71
printf("difftime+: %lf\n", difftime(t5, xmas2002));
72
printf("difftime-: %lf\n", difftime(xmas2002, t5));
74
// Verify dysize() knows its leap years.
75
printf("1854 days: %d\n", dysize(1854));
76
printf("2000 days: %d\n", dysize(2000));
77
printf("2001 days: %d\n", dysize(2001));
78
printf("2004 days: %d\n", dysize(2004));
80
// Verify asctime() formatting().
81
printf("asctime: %s", asctime(gmtime(&xmas2002)));
83
// Verify asctime_r() doesn't clobber static data.
84
time_t t6 = 1309635200ll;
85
tm_ptr = gmtime(&xmas2002);
86
char* formatted = asctime(tm_ptr);
88
asctime_r(gmtime(&t6), buffer);
89
printf("old asctime: %s", formatted);
90
printf("new asctime_r: %s", buffer);
91
asctime_r(tm_ptr, buffer);
92
printf("old asctime again: %s", formatted);
94
// Verify that clock() advances.
95
time_t start_t = time(NULL);
96
clock_t start = clock();
97
printf("clock(start): %d\n", start >= 0);
98
while (clock() - start < 2 * CLOCKS_PER_SEC); // Poor man's sleep().
99
clock_t diff = time(NULL) - start_t;
100
printf("clock(end): %d\n", diff >= 2 && diff < 30);
102
// Verify that ctime_r(x, buf) is equivalent to asctime_r(localtime(x), buf).
106
printf("ctime: %d\n", strcmp(ctime_r(&t7, buffer2),
107
asctime_r(localtime(&t7), buffer3)));