office-gobmx/i18npool/inc/calendar_hijri.hxx
Hossein 0308e48e46 tdf#145759 30.6001 -> monthDaysWithoutJanFeb
30.6001 shows month days without Jan and Feb.
According to the below link, it is calcuated as (365-31-28)/10 = 30.6
but because of a floating point bug, it was used as 30.6001 as a
workaround.

"30.6001, 25 year old hack?"
https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv011.cgi?read=31650

The value 30.6 is used as i18nutil::monthDaysWithoutJanFeb here
instead of 30.6001. The new value is ~30.60000038 which is > 30.6, so
the calculations should be correct. In order to make sure, a unit test
is added, and part of the values are checked against the values
calculated by this website:

Julian Day and Civil Date Calculator
https://core2.gsfc.nasa.gov/time/julian.html

Change-Id: I8cc7e046514dc3de652a1c37399e351cb2b614dc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/125813
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>
2022-02-25 19:12:41 +01:00

49 lines
1.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include "calendar_gregorian.hxx"
namespace i18npool {
class Calendar_hijri final : public Calendar_gregorian
{
public:
// Constructors
Calendar_hijri();
private:
void mapToGregorian() override;
void mapFromGregorian() override;
public:
static double SAL_DLLPUBLIC_EXPORT NewMoon(sal_Int32 n);
static void SAL_DLLPUBLIC_EXPORT getHijri(sal_Int32 *day, sal_Int32 *month, sal_Int32 *year);
static void SAL_DLLPUBLIC_EXPORT ToGregorian(sal_Int32 *day, sal_Int32 *month, sal_Int32 *year);
static void SAL_DLLPUBLIC_EXPORT getGregorianDay(sal_Int32 jd, sal_Int32 *pnDay, sal_Int32 *pnMonth, sal_Int32 *pnYear);
static sal_Int32 SAL_DLLPUBLIC_EXPORT getJulianDay(sal_Int32 day, sal_Int32 month, sal_Int32 year);
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */