127 lines
3.6 KiB
C++
127 lines
3.6 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/CBotReturn.h"
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#include "CBot/CBotInstr/CBotInstrUtils.h"
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#include "CBot/CBotInstr/CBotExpression.h"
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#include "CBot/CBotStack.h"
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#include "CBot/CBotCStack.h"
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namespace CBot
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{
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////////////////////////////////////////////////////////////////////////////////
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CBotReturn::CBotReturn()
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{
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m_instr = nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////
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CBotReturn::~CBotReturn()
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{
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delete m_instr;
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}
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////////////////////////////////////////////////////////////////////////////////
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CBotInstr* CBotReturn::Compile(CBotToken* &p, CBotCStack* pStack)
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{
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CBotToken* pp = p;
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if (!IsOfType(p, ID_RETURN)) return nullptr; // should never happen
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CBotReturn* inst = new CBotReturn(); // creates the object
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inst->SetToken( pp );
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CBotTypResult type = pStack->GetRetType();
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if ( type.GetType() == 0 ) // returned void ?
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{
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if ( IsOfType( p, ID_SEP ) ) return inst;
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pStack->SetError( CBotErrBadType1, pp );
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return nullptr;
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}
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inst->m_instr = CBotExpression::Compile(p, pStack);
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if ( pStack->IsOk() )
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{
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CBotTypResult retType = pStack->GetTypResult(CBotVar::GetTypeMode::CLASS_AS_INTRINSIC);
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if (TypeCompatible(retType, type, ID_ASS))
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{
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if ( IsOfType( p, ID_SEP ) )
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return inst;
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pStack->SetError(CBotErrNoTerminator, p->GetStart());
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}
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pStack->SetError(CBotErrBadType1, p->GetStart());
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}
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delete inst;
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return nullptr; // no object, the error is on the stack
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}
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////////////////////////////////////////////////////////////////////////////////
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bool CBotReturn::Execute(CBotStack* &pj)
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{
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CBotStack* pile = pj->AddStack(this);
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// if ( pile == EOX ) return true;
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if ( pile->GetState() == 0 )
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{
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if (m_instr != nullptr && !m_instr->Execute(pile) ) return false; // evaluate the result
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// the result is on the stack
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pile->IncState();
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}
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if ( pile->IfStep() ) return false;
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pile->SetBreak(3, std::string());
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return pj->Return(pile);
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}
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////////////////////////////////////////////////////////////////////////////////
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void CBotReturn::RestoreState(CBotStack* &pj, bool bMain)
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{
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if ( !bMain ) return;
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CBotStack* pile = pj->RestoreStack(this);
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if ( pile == nullptr ) return;
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if ( pile->GetState() == 0 )
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{
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if (m_instr != nullptr ) m_instr->RestoreState(pile, bMain); // evaluate the result
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return;
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}
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}
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bool CBotReturn::HasReturn()
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{
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return true;
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}
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std::map<std::string, CBotInstr*> CBotReturn::GetDebugLinks()
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{
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auto links = CBotInstr::GetDebugLinks();
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links["m_instr"] = m_instr;
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return links;
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}
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} // namespace CBot
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