ai_subsidy.cpp

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00001 /* $Id: ai_subsidy.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_subsidy.hpp"
00014 #include "ai_date.hpp"
00015 #include "../../subsidy_base.h"
00016 #include "../../station_base.h"
00017 
00018 /* static */ bool AISubsidy::IsValidSubsidy(SubsidyID subsidy_id)
00019 {
00020   return ::Subsidy::IsValidID(subsidy_id);
00021 }
00022 
00023 /* static */ bool AISubsidy::IsAwarded(SubsidyID subsidy_id)
00024 {
00025   if (!IsValidSubsidy(subsidy_id)) return false;
00026 
00027   return ::Subsidy::Get(subsidy_id)->IsAwarded();
00028 }
00029 
00030 /* static */ AICompany::CompanyID AISubsidy::GetAwardedTo(SubsidyID subsidy_id)
00031 {
00032   if (!IsAwarded(subsidy_id)) return AICompany::COMPANY_INVALID;
00033 
00034   return (AICompany::CompanyID)((byte)::Subsidy::Get(subsidy_id)->awarded);
00035 }
00036 
00037 /* static */ int32 AISubsidy::GetExpireDate(SubsidyID subsidy_id)
00038 {
00039   if (!IsValidSubsidy(subsidy_id)) return -1;
00040 
00041   int year = AIDate::GetYear(AIDate::GetCurrentDate());
00042   int month = AIDate::GetMonth(AIDate::GetCurrentDate());
00043 
00044   month += ::Subsidy::Get(subsidy_id)->remaining;
00045 
00046   year += (month - 1) / 12;
00047   month = ((month - 1) % 12) + 1;
00048 
00049   return AIDate::GetDate(year, month, 1);
00050 }
00051 
00052 /* static */ CargoID AISubsidy::GetCargoType(SubsidyID subsidy_id)
00053 {
00054   if (!IsValidSubsidy(subsidy_id)) return CT_INVALID;
00055 
00056   return ::Subsidy::Get(subsidy_id)->cargo_type;
00057 }
00058 
00059 /* static */ AISubsidy::SubsidyParticipantType AISubsidy::GetSourceType(SubsidyID subsidy_id)
00060 {
00061   if (!IsValidSubsidy(subsidy_id)) return SPT_INVALID;
00062 
00063   return (SubsidyParticipantType)(uint)::Subsidy::Get(subsidy_id)->src_type;
00064 }
00065 
00066 /* static */ int32 AISubsidy::GetSourceIndex(SubsidyID subsidy_id)
00067 {
00068   if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;
00069 
00070   return ::Subsidy::Get(subsidy_id)->src;
00071 }
00072 
00073 /* static */ AISubsidy::SubsidyParticipantType AISubsidy::GetDestinationType(SubsidyID subsidy_id)
00074 {
00075   if (!IsValidSubsidy(subsidy_id)) return SPT_INVALID;
00076 
00077   return (SubsidyParticipantType)(uint)::Subsidy::Get(subsidy_id)->dst_type;
00078 }
00079 
00080 /* static */ int32 AISubsidy::GetDestinationIndex(SubsidyID subsidy_id)
00081 {
00082   if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;
00083 
00084   return ::Subsidy::Get(subsidy_id)->dst;
00085 }

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