time_t
mktime(struct tm *pt)
{
time_t res = 0;
int unix_year;
time_t year_secs;
pt->tm_wday = 0;
pt->tm_yday = 0;
if (tm_out_of_range(pt)) {
errno = EOVERFLOW;
return (time_t)(-1);
}
unix_year = (1900 + pt->tm_year) - 1970;
if (unix_year != 0) {
if (unix_year < 0) {
res += get_year_seconds(abs(unix_year) - 1, 1971 + unix_year);
} else {
res += get_year_seconds(unix_year, 1970);
}
}
pt->tm_yday = get_yday(pt);
if (unix_year < 0) {
year_secs = pt->tm_yday * 86400;
year_secs += pt->tm_hour * 3600;
year_secs += pt->tm_min * 60;
year_secs += pt->tm_sec;
if (is_leap_year(1970 + unix_year)) {
res += (31622400 - year_secs);
} else {
res += (31536000 - year_secs);
}
res = -res;
} else {
res += pt->tm_yday * 86400;
res += pt->tm_hour * 3600;
res += pt->tm_min * 60;
res += pt->tm_sec;
}
pt->tm_wday = get_week_day(res / 86400);
_tz_add_offset(&res);
return res;
}
//-----------------------------------------------------------------//
long get_total_day(short year, char mon, char day)
{
if(year < 1970) return -1L;
long d = 0;
short i = 1970;
while(i < year) {
d += (long)get_yday(i);
i++;
}
i = 0;
while(i < mon) {
d += get_mday(year, i);
i++;
}
d += day - 1;
return d;
}
//-----------------------------------------------------------------//
struct tm *gmtime(const time_t *tp)
{
time_t t;
short i, j, k;
t = *tp;
time_st_.tm_sec = t % (time_t)60;
t /= (time_t)60;
time_st_.tm_min = t % (time_t)60;
t /= (time_t)60;
time_st_.tm_hour = t % (time_t)24;
t /= (time_t)24;
time_st_.tm_wday = (t + 4) % 7;
j = 1970;
while(t >= (i = get_yday(j))) {
t -= (time_t)i;
j++;
}
time_st_.tm_year = j - 1900;
time_st_.tm_yday = t;
k = 0;
while(t >= (i = get_mday(j, k))) {
t -= (time_t)i;
k++;
}
time_st_.tm_mon = k;
time_st_.tm_mday = t + 1;
return &time_st_;
}