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1e4a89177e
When a game script is in company mode, it pretends to be another company. When that company disappear (bankruptcy/merger), the game script still uses that company and it keeps calling functions as if it is that company. For example, ScriptEngine::IsBuildable internally dereferences Company without checks, causing a null dereference for any ScriptEngine function when called from a company scope of a company that has disappeared. Guard against this by extending the ScriptCompanyScope::IsValid check to also check for the company still being active.
39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
/*
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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 script_companymode.cpp Implementation of ScriptCompanyMode. */
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#include "../../stdafx.h"
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#include "../../company_base.h"
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#include "script_companymode.hpp"
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#include "../../safeguards.h"
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ScriptCompanyMode::ScriptCompanyMode(SQInteger company)
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{
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if (company < OWNER_BEGIN || company >= MAX_COMPANIES) company = INVALID_COMPANY;
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if (!::Company::IsValidID(company)) company = INVALID_COMPANY;
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this->last_company = ScriptObject::GetCompany();
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ScriptObject::SetCompany((::CompanyID)company);
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}
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ScriptCompanyMode::~ScriptCompanyMode()
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{
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ScriptObject::SetCompany(this->last_company);
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}
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/* static */ bool ScriptCompanyMode::IsValid()
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{
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return ::Company::IsValidID(ScriptObject::GetCompany());
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}
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/* static */ bool ScriptCompanyMode::IsDeity()
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{
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return ScriptObject::GetCompany() == OWNER_DEITY;
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}
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