1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#include <euler/syscall.hpp>
#include <ctime>
time_t time(time_t *arg) {
time_t t = euler::syscall::get_time();
if (arg) *arg = t;
return t;
}
static tm static_tm;
static int days_per_month[] = {
31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
tm *gmtime(const time_t *time) {
time_t t = *time / 1024;
static_tm.tm_isdst = 0;
static_tm.tm_sec = t % 60; t /= 60;
static_tm.tm_min = t % 60; t /= 60;
static_tm.tm_hour = t % 24; t /= 24;
static_tm.tm_wday = (t + 5) % 7 + 1;
static_tm.tm_year = (t / 1461) * 4 + 100;
int days_into_quadyear = t % 1461;
static_tm.tm_yday = 0;
static_tm.tm_mon = 0;
static_tm.tm_mday = 1;
for (int i = 0; i < 48; ++i) {
if (days_into_quadyear >= days_per_month[i]) {
days_into_quadyear -= days_per_month[i];
if (static_tm.tm_mon == 11) {
static_tm.tm_mon = 0;
static_tm.tm_yday = 0;
}
else {
++static_tm.tm_mon;
static_tm.tm_yday += days_per_month[i];
}
}
else {
static_tm.tm_yday += days_into_quadyear;
static_tm.tm_mday += days_into_quadyear;
break;
}
}
return &static_tm;
}
|