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/*
* Copyright (c) [2011-2014] Novell, Inc.
*
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, contact Novell, Inc.
*
* To contact Novell about this file by physical or electronic mail, you may
* find current contact information at www.novell.com.
*/
#include <time.h>
#include "equal-date.h"
#define isleapyear(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
int
yday_of_weeks_monday(const struct tm& tmp)
{
return tmp.tm_yday - (tmp.tm_wday != 0 ? tmp.tm_wday : 7);
}
int
days_in_year(const struct tm& tmp)
{
return isleapyear(tmp.tm_year) ? 366 : 365;
}
bool
equal_year(const struct tm& tmp1, const struct tm& tmp2)
{
return tmp1.tm_year == tmp2.tm_year;
}
bool
equal_month(const struct tm& tmp1, const struct tm& tmp2)
{
return equal_year(tmp1, tmp2) && tmp1.tm_mon == tmp2.tm_mon;
}
bool
equal_week(const struct tm& tmp1, const struct tm& tmp2)
{
if (tmp1.tm_year == tmp2.tm_year)
return yday_of_weeks_monday(tmp1) == yday_of_weeks_monday(tmp2);
if (tmp1.tm_year + 1 == tmp2.tm_year)
return yday_of_weeks_monday(tmp1) == yday_of_weeks_monday(tmp2) + days_in_year(tmp1);
if (tmp1.tm_year == tmp2.tm_year + 1)
return yday_of_weeks_monday(tmp1) + days_in_year(tmp2) == yday_of_weeks_monday(tmp2);
return false;
}
bool
equal_day(const struct tm& tmp1, const struct tm& tmp2)
{
return equal_month(tmp1, tmp2) && tmp1.tm_mday == tmp2.tm_mday;
}
bool
equal_hour(const struct tm& tmp1, const struct tm& tmp2)
{
return equal_day(tmp1, tmp2) && tmp1.tm_hour == tmp2.tm_hour;
}
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