138 lines
3.8 KiB
C++
138 lines
3.8 KiB
C++
/*
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* This file is part of the Colobot: Gold Edition source code
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* Copyright (C) 2001-2016, Daniel Roux, EPSITEC SA & TerranovaTeam
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* http://epsitec.ch; http://colobot.info; http://github.com/colobot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://gnu.org/licenses
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*/
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#include "CBot/CBotInstr/CBotFieldExpr.h"
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#include "CBot/CBotStack.h"
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#include "CBot/CBotCStack.h"
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#include "CBot/CBotClass.h"
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#include "CBot/CBotVar/CBotVarClass.h"
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#include <cassert>
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#include <sstream>
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namespace CBot
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{
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////////////////////////////////////////////////////////////////////////////////
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CBotFieldExpr::CBotFieldExpr()
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{
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m_nIdent = 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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CBotFieldExpr::~CBotFieldExpr()
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{
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}
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////////////////////////////////////////////////////////////////////////////////
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void CBotFieldExpr::SetUniqNum(int num)
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{
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m_nIdent = num;
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}
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////////////////////////////////////////////////////////////////////////////////
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bool CBotFieldExpr::ExecuteVar(CBotVar* &pVar, CBotCStack* &pile)
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{
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if (pVar->GetType(CBotVar::GetTypeMode::CLASS_AS_POINTER) != CBotTypPointer)
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assert(0);
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pVar = pVar->GetItemRef(m_nIdent);
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if (pVar == nullptr)
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{
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pile->SetError(CBotErrUndefItem, &m_token);
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return false;
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}
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if ( m_next3 != nullptr &&
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!m_next3->ExecuteVar(pVar, pile) ) return false;
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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bool CBotFieldExpr::ExecuteVar(CBotVar* &pVar, CBotStack* &pile, CBotToken* prevToken, bool bStep, bool bExtend)
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{
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CBotStack* pj = pile;
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pile = pile->AddStack(this); // changes in output stack
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if (pVar->GetType(CBotVar::GetTypeMode::CLASS_AS_POINTER) != CBotTypPointer)
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assert(0);
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CBotVarClass* pItem = pVar->GetPointer();
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if (pItem == nullptr)
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{
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pile->SetError(CBotErrNull, prevToken);
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return pj->Return(pile);
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}
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if (pItem->GetUserPtr() == OBJECTDELETED)
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{
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pile->SetError(CBotErrDeletedPtr, prevToken);
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return pj->Return(pile);
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}
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if (bStep && pile->IfStep()) return false;
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pVar = pVar->GetItemRef(m_nIdent);
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if (pVar == nullptr)
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{
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pile->SetError(CBotErrUndefItem, &m_token);
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return pj->Return(pile);
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}
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if (pVar->IsStatic())
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{
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// for a static variable, takes it in the class itself
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CBotClass* pClass = pItem->GetClass();
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pVar = pClass->GetItem(m_token.GetString());
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}
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// request the update of the element, if applicable
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pVar->Update(pile->GetUserPtr());
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if ( m_next3 != nullptr &&
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!m_next3->ExecuteVar(pVar, pile, &m_token, bStep, bExtend) ) return false;
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// does not release the stack
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// to maintain the state SetState () corresponding to step
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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void CBotFieldExpr::RestoreStateVar(CBotStack* &pj, bool bMain)
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{
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pj = pj->RestoreStack(this);
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if (pj == nullptr) return;
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if (m_next3 != nullptr)
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m_next3->RestoreStateVar(pj, bMain);
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}
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std::string CBotFieldExpr::GetDebugData()
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{
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std::stringstream ss;
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ss << "VarID = " << m_nIdent;
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return ss.str();
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}
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} // namespace CBot
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