1 /* 2 * This file is part of the Colobot: Gold Edition source code 3 * Copyright (C) 2001-2020, Daniel Roux, EPSITEC SA & TerranovaTeam 4 * http://epsitec.ch; http://colobot.info; http://github.com/colobot 5 * 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 14 * See the GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see http://gnu.org/licenses 18 */ 19 20 #include "CBot/CBotInstr/CBotExprLitNull.h" 21 22 #include "CBot/CBotStack.h" 23 24 #include "CBot/CBotVar/CBotVar.h" 25 26 namespace CBot 27 { 28 29 //////////////////////////////////////////////////////////////////////////////// CBotExprLitNull()30CBotExprLitNull::CBotExprLitNull() 31 { 32 } 33 34 //////////////////////////////////////////////////////////////////////////////// ~CBotExprLitNull()35CBotExprLitNull::~CBotExprLitNull() 36 { 37 } 38 39 //////////////////////////////////////////////////////////////////////////////// Execute(CBotStack * & pj)40bool CBotExprLitNull::Execute(CBotStack* &pj) 41 { 42 CBotStack* pile = pj->AddStack(this); 43 44 if (pile->IfStep()) return false; 45 CBotVar* var = CBotVar::Create("", CBotTypNullPointer); 46 47 var->SetInit(CBotVar::InitType::DEF); // null pointer valid 48 pile->SetVar(var); // place on the stack 49 return pj->Return(pile); // forwards below 50 } 51 52 //////////////////////////////////////////////////////////////////////////////// RestoreState(CBotStack * & pj,bool bMain)53void CBotExprLitNull::RestoreState(CBotStack* &pj, bool bMain) 54 { 55 if (bMain) pj->RestoreStack(this); 56 } 57 58 } // namespace CBot 59