ai_date.cpp

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00001 /* $Id: ai_date.cpp 21888 2011-01-22 10:33:16Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #include "../../stdafx.h"
00013 #include "ai_date.hpp"
00014 #include "../../date_func.h"
00015 
00016 /* static */ int32 AIDate::GetCurrentDate()
00017 {
00018   return ::_date;
00019 }
00020 
00021 /* static */ int32 AIDate::GetYear(int32 date)
00022 {
00023   if (date < 0) return -1;
00024 
00025 	::YearMonthDay ymd;
00026 	::ConvertDateToYMD(date, &ymd);
00027   return ymd.year;
00028 }
00029 
00030 /* static */ int32 AIDate::GetMonth(int32 date)
00031 {
00032   if (date < 0) return -1;
00033 
00034 	::YearMonthDay ymd;
00035 	::ConvertDateToYMD(date, &ymd);
00036   return ymd.month + 1;
00037 }
00038 
00039 /* static */ int32 AIDate::GetDayOfMonth(int32 date)
00040 {
00041   if (date < 0) return -1;
00042 
00043 	::YearMonthDay ymd;
00044 	::ConvertDateToYMD(date, &ymd);
00045   return ymd.day;
00046 }
00047 
00048 /* static */ int32 AIDate::GetDate(int32 year, int32 month, int32 day_of_month)
00049 {
00050   if (month < 1 || month > 12) return -1;
00051   if (day_of_month < 1 || day_of_month > 31) return -1;
00052   if (year < 0 || year > MAX_YEAR) return -1;
00053 
00054   return ::ConvertYMDToDate(year, month - 1, day_of_month);
00055 }

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