#include "time_new.h"
static const unsigned char mon_lengths[2][MONSPERYEAR] =
{
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
} ;
static const unsigned short year_lengths[2] =
{
365,
366
} ;
tm_new local_time;
unsigned long UTCTime;
void gmtime_new(tm_new * res,const unsigned long timestamp)
{
unsigned long days, rem,temp_d;
unsigned int y;
unsigned int yleap;
const unsigned char * ip;
days = timestamp / SECSPERDAY; //得到天
rem = timestamp % SECSPERDAY; //得到天之后秒数
/* compute hour, min, and sec */
temp_d = (rem / SECSPERHOUR);
res->tm_hour=temp_d;
temp_d = rem % SECSPERHOUR;
rem = temp_d;
res->tm_min = (rem / SECSPERMIN);
res->tm_sec = (rem % SECSPERMIN);
/* compute day of week */
if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
res->tm_wday += DAYSPERWEEK;
/* compute year & day of year */
y = EPOCH_YEAR;
for (;;)
{
yleap = isleap(y);
if (days < year_lengths[yleap])
{
break;
}
y++;
days -= year_lengths[yleap];
}
res->tm_year = y - YEAR_BASE;
res->tm_yday = days;
ip = mon_lengths[yleap];
for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
{
days -= ip[res->tm_mon];
}
++res->tm_mon;
res->tm_mday = days + 1;
/* set daylight saving time flag */
res->tm_isdst = -1;
}
static const unsigned short _DAYS_BEFORE_MONTH[12] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
#define _ISLEAP(y) (((y) % 4) == 0 && (((y) % 100) != 0 || (((y)+1900) % 400) == 0))
#define _DAYS_IN_YEAR(year) (_ISLEAP(year) ? 366 : 365)
unsigned long mktime_new( tm_new * tim_p)
{
unsigned long tim=0;
unsigned long days = 0;
unsigned long year;
/* compute hours, minutes, seconds */
tim += tim_p->tm_sec + (tim_p->tm_min * _SEC_IN_MINUTE) +
((tim_p->tm_hour) * _SEC_IN_HOUR);
/* compute days in year */
days += tim_p->tm_mday - 1;
days += _DAYS_BEFORE_MONTH[tim_p->tm_mon - 1];
//if (tim_p->tm_mon > 1 && _DAYS_IN_YEAR (tim_p->tm_year) == 366)
if (tim_p->tm_mon > 2 && _DAYS_IN_YEAR (tim_p->tm_year) == 366)
days++;
/* compute days in other years */
for (year = 70; year < tim_p->tm_year; year++)
days += _DAYS_IN_YEAR (year);
/* compute total seconds */
tim += (days * _SEC_IN_DAY);
return tim;
}
