浅谈时间戳与日期时间互转C语言
浅谈时间戳与日期时间互转C语言
/*
*ctime.h
*
*Createdon:May19,2016
*
*/
#ifndefCTIME_H_
#defineCTIME_H_
#include"common/micro_type.h"
#defineOFFSET_SECOND946684800/*��1970/1/1/0/0/0��2000/1/1/0/0/0֮���������*/
//#defineOFFSET_SECOND0/*��2000/1/1/0/0/0��2000/1/1/0/0/0֮���������*/
#defineSECOND_OF_DAY86400/*1�������*/
typedefstructdate_time
{
uint16iYear;
uint16iMon;
uint16iDay;
uint16iHour;
uint16iMin;
uint16iSec;
uint16iMsec;
}DATE_TIME;
voidGetDateTimeFromSecond(unsignedlonglSec,DATE_TIME*tTime);
#endif/*CTIME_H_*/
/*
*ctime.c
*
*Createdon:May19,2016
*Author:root
*/
#include"common/micro_type.h"
#include"ctime.h"
uint8DayOfMon[12]={31,28,31,30,31,30,31,31,30,31,30,31};
/*������1970/1/1/0/0/0�����ʱ*/
unsignedlongGetSecondTime(DATE_TIME*date_time)
{
uint16iYear,iMon,iDay,iHour,iMin,iSec;
iYear=date_time->iYear;
iMon=date_time->iMon;
iDay=date_time->iDay;
iHour=date_time->iHour;
iMin=date_time->iMin;
iSec=date_time->iSec;
uint16i,Cyear=0;
unsignedlongCountDay=0;
for(i=1970;i<iYear;i++)/*ͳ��1970�굽����֮ǰ��������*/
{
if(((i%4==0)&&(i%100!=0))||(i%400==0))Cyear++;
}
CountDay=Cyear*366+(iYear-1970-Cyear)*365;
for(i=1;i<iMon;i++)
{
if((i==2)&&(((iYear%4==0)&&(iYear%100!=0))||(iYear%400==0)))
CountDay+=29;
else
CountDay+=DayOfMon[i-1];
}
CountDay+=(iDay-1);
CountDay=CountDay*SECOND_OF_DAY+(unsignedlong)iHour*3600+(unsignedlong)iMin*60+iSec;
returnCountDay;
}
/*����ʱ�������1970/1/1/0/0������*/
voidGetDateTimeFromSecond(unsignedlonglSec,DATE_TIME*tTime)
{
uint16i,j,iDay;
unsignedlonglDay;
lDay=lSec/SECOND_OF_DAY;/*תΪ�������ʱ��*/
lSec=lSec%SECOND_OF_DAY;
i=1970;
while(lDay>365)
{
if(((i%4==0)&&(i%100!=0))||(i%400==0))/*����*/
lDay-=366;
else
lDay-=365;
i++;
}
if((lDay==365)&&!(((i%4==0)&&(i%100!=0))||(i%400==0)))/*ƽ��*/
{
lDay-=365;
i++;
}
tTime->iYear=i;/*�õ����*/
for(j=0;j<12;j++)/*�����·�*/
{
if((j==1)&&(((i%4==0)&&(i%100!=0))||(i%400==0)))
iDay=29;
else
iDay=DayOfMon[j];
if(lDay>=iDay)lDay-=iDay;
elsebreak;
}
tTime->iMon=j+1;
tTime->iDay=lDay+1;
tTime->iHour=((lSec/3600)+8)%24;//这里注意，世界时间已经加上北京时间差8，
tTime->iMin=(lSec%3600)/60;
tTime->iSec=(lSec%3600)%60;
}
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