55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file ai_date.cpp Implementation of AIDate. */
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#include "ai_date.hpp"
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#include "../../date_func.h"
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/* static */ int32 AIDate::GetCurrentDate()
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{
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return ::_date;
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}
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/* static */ int32 AIDate::GetYear(int32 date)
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{
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if (date < 0) return -1;
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::YearMonthDay ymd;
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::ConvertDateToYMD(date, &ymd);
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return ymd.year;
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}
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/* static */ int32 AIDate::GetMonth(int32 date)
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{
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if (date < 0) return -1;
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::YearMonthDay ymd;
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::ConvertDateToYMD(date, &ymd);
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return ymd.month + 1;
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}
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/* static */ int32 AIDate::GetDayOfMonth(int32 date)
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{
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if (date < 0) return -1;
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::YearMonthDay ymd;
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::ConvertDateToYMD(date, &ymd);
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return ymd.day;
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}
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/* static */ int32 AIDate::GetDate(int32 year, int32 month, int32 day_of_month)
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{
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if (month < 1 || month > 12) return -1;
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if (day_of_month < 1 || day_of_month > 31) return -1;
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if (year < 0 || year > MAX_YEAR) return -1;
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return ::ConvertYMDToDate(year, month - 1, day_of_month);
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}
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