add_inputtime.c

来自「seed格式数据解压程序,地震分析人员必备」· C语言 代码 · 共 54 行

/*===========================================================================*/
/* DMC Interim     |              add_inputtime            |         utility */
/*===========================================================================*/
/*
	Name:		add_inputtime
	Purpose:	add two times in struct input_time fmt
	Usage:		struct input_time add_inputtime ();
				struct input_time time1;
				struct input_time time2;
				newtime = add_inputtime (time1, time2);
	Input:		time1 = time
				time2 = time
	Output:		newtime = output time in struct input_time form
	Externals:	none
	Warnings:	none
	Errors:		none
	Called by:	anything
	Calls to:	none
	Algorithm:	none
	Notes:		the second time should be the smaller of the two, if
				they are not the same size.
				if time2.year is non-zero, gregorian calendar years are
				assumed (ie., leap years are interspersed).
				use time2.days > 365 to get fixed length year offsets.
	Problems:	
				Currently ignores leap seconds.
	References:	none
	Language:	ANSI standard C
	Author:		03/10/89 mark wiederspahn written from add_time
	Revisions:	
*/

#include "output.h"

#define isaleap(year) (((year%100 != 0) && (year%4 == 0)) || (year%400 == 0))

struct	input_time 	add_inputtime (time1, time2)
struct	input_time 	time1;
struct	input_time 	time2;
{
	long				delta;
	int					year2;

	delta = time2.second;
	delta += (long)time2.minute * 60;
	delta += (long)time2.hour   * 60*60;
	delta += (long)time2.day    * 60*60*24;
	year2 = time2.year;
	time2 = add_longtime (time1, delta);
	time2.year += year2;

	return ( time2 );
}