CTime引起的崩溃以及解决方案

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1、头文件

#include <atltime.h>

2、崩溃原因

取值范围越界导致，比如 CTime ct(3001,1,1,0,0,0);就会导致崩溃

范围如下：

nYear

1970-3000 

nMonth

1-12 

nDay

1-31 

nHour

0-23 

nMin

0-59 

nSec

0-59

3、解决方案

使用CTime的时候先进行有效性检查，比如时间有效性检查函数

bool CDBBagInfoControl::bCheckDate(int year, int month, int day)
{
	time_t time_tmp;
	struct tm tm_new;
	struct tm *tm_old;

	if(year < 1900 || month <= 0 || month > 12 || day <= 0 || day > 31)
	{
		return false;
	}
	
	tm_new.tm_year = year - 1900;
	tm_new.tm_mon = month - 1;
	tm_new.tm_mday = day;
	tm_new.tm_hour = 0;
	tm_new.tm_min = 0;
	tm_new.tm_sec = 0;
	time_tmp = mktime(&tm_new);

	if (time_tmp == -1)
	{
		return false;
	}

	tm_old = localtime(&time_tmp);

	if(tm_old->tm_year != year - 1900 || tm_old->tm_mon != month - 1 || tm_old->tm_mday != day)
	{
		return false;
	}
	else
	{
		return true;
	}
}