testdate.c

unix环境下c语言屏幕编程开发

#include "../inc/screen.h"

/*
 *	检查日期是否正确
 */

testdate(ymd)
struct	date	ymd;
{
	register int	tag,year,month,day;

	tag = ymd.year / 100;
	year = ymd.year;
	month = ymd.month;
	day = ymd.day;

	if(day < 1)
		return(FALSE);

	if((tag != 0 && (tag < 19 || tag > 20)) || year < 70 || day == 0)
		return(FALSE);
	
	switch(month)
	{
		case 1: case 3: case 5: case 7:
		case 8: case 10: case 12:
			
			if(day > 31)
				return(FALSE);
			break;

		case 4: case 6: case 9: case 11:

			if(day > 30)
				return(FALSE);
			break;
		
		case 2:

			if(day > 29)
				return(FALSE);
			else if(day == 29 && year % 400 != 0 && (year % 4 != 0
				|| year % 100 == 0))
				return(FALSE);
			break;

		default:

			return(FALSE);
	}

	return(TRUE);
}

testldate(ymd)
long	ymd;
{
	struct	date	ymdx;

	ymdx.year = (int)(ymd / 10000l);
	ymdx.month = (int)((ymd % 10000l) / 100l);
	ymdx.day = (int)(ymd % 100l);

	return(testdate(ymdx));
}

testsdate(ymd)
int	ymd;
{
	struct	date	ymdx;

	ymdx.ymd = ymd;
	xdate(&ymdx);
	return(testdate(ymdx));
}