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

 
#ifndef CTIME_H_
#define CTIME_H_
#include "common/micro_type.h"
#define OFFSET_SECOND   946684800 
//#define OFFSET_SECOND  0     
#define SECOND_OF_DAY   86400   
 
typedef struct date_time
{
  uint16  iYear;
  uint16  iMon;
  uint16  iDay;
 
  uint16  iHour;
  uint16  iMin;
  uint16  iSec;
  uint16  iMsec;
} DATE_TIME;
 
void GetDateTimeFromSecond(unsigned long lSec, DATE_TIME *tTime);
#endif 
 


#include "common/micro_type.h"
#include "ctime.h"
uint8 DayOfMon[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
 

unsigned long GetSecondTime(DATE_TIME *date_time)
{
  uint16 iYear, 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;
 
  uint16 i, Cyear=0;
  unsigned long CountDay=0;
 
  for(i=1970; i 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))) 
  {
   lDay -= 365;
   i++;
  }
  tTime->iYear = i;   
  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;
   else break;
  }
  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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