00001 /* $Id$ */ 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 "ai_date.hpp" 00013 #include "../../date_func.h" 00014 00015 /* static */ int32 AIDate::GetCurrentDate() 00016 { 00017 return ::_date; 00018 } 00019 00020 /* static */ int32 AIDate::GetYear(int32 date) 00021 { 00022 if (date < 0) return -1; 00023 00024 ::YearMonthDay ymd; 00025 ::ConvertDateToYMD(date, &ymd); 00026 return ymd.year; 00027 } 00028 00029 /* static */ int32 AIDate::GetMonth(int32 date) 00030 { 00031 if (date < 0) return -1; 00032 00033 ::YearMonthDay ymd; 00034 ::ConvertDateToYMD(date, &ymd); 00035 return ymd.month + 1; 00036 } 00037 00038 /* static */ int32 AIDate::GetDayOfMonth(int32 date) 00039 { 00040 if (date < 0) return -1; 00041 00042 ::YearMonthDay ymd; 00043 ::ConvertDateToYMD(date, &ymd); 00044 return ymd.day; 00045 } 00046 00047 /* static */ int32 AIDate::GetDate(int32 year, int32 month, int32 day_of_month) 00048 { 00049 if (month < 1 || month > 12) return -1; 00050 if (day_of_month < 1 || day_of_month > 31) return -1; 00051 if (year < 0 || year > MAX_YEAR) return -1; 00052 00053 return ::ConvertYMDToDate(year, month - 1, day_of_month); 00054 }