datetotimeconversion.c

zilog的实时操作系统RZK,可以移植到多种处理器上

/*
* File				:	DateToTimeConversion
*
* Description		:	This file contains definition of MkTime function 
* 
* Copyright 2004 ZiLOG Inc.  ALL RIGHTS RESERVED.
*
* This file contains unpublished confidential and proprietary information
* of ZiLOG, Inc.
* NO PART OF THIS WORK MAY BE DUPLICATED, STORED, PUBLISHED OR DISCLOSED 
* IN ANY FORM WITHOUT THE PRIOR WRITTEN CONSENT OF ZiLOG, INC.
* This is not a license and no use of any kind of this work is authorized
* in the absence of a written license granted by ZiLOG, Inc. in ZiLOG's 
* sole discretion 
*/
#include "ZClock.h"
#include "ZTypes.h"

/* Function			:	MkTime
*
* Description		:	This function returns the seconds for the particular
*						Date and time that has specified. 
* 
* Inputs			:	year - Specifies the year.
*						mon  - Specifies the month.
*						day	 - Specifies the day.
*						hour - Specifies the hour.
*						min  - Specifies the minutes.
*						sec  - Specifies the seconds.
*							
* Outputs			:	returns the seconds for the above mentioned Date and Time. 
*							
*
* Dependencies		:	None.
*/
UINT32 MkTime(UINT year, UINT mon,UINT day, UINT16 hour,UINT16 min, UINT16 sec)
{
	if (0 >= (INT) (mon -= 2)) {	/* 1..12 -> 11,12,1..10 */
		mon += 12;	/* Puts Feb last since it has leap day */
		year -= 1;
	}
	
	{
	        UINT temp4 = year/4;
	        UINT temp100 = year/100;
	        UINT temp400 = year/400;
	        UINT tempmon = (367 * mon/12);
	        UINT32 temp365 = (UINT32)year * (UINT32)365;
	        
		UINT32 yeartemp = (UINT32)(temp4 - temp100 + temp400 + tempmon + day) + temp365 - 719499;
                UINT32 returntemp = ((yeartemp*24 + hour)*60 + min)*60 + sec;
		return (returntemp); /* finally seconds */
	}
}