colobot/src/CBot/CBotInstr/CBotPostIncExpr.cpp

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/*
* This file is part of the Colobot: Gold Edition source code
* Copyright (C) 2001-2015, Daniel Roux, EPSITEC SA & TerranovaTeam
* http://epsitec.ch; http://colobot.info; http://github.com/colobot
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://gnu.org/licenses
*/
// Modules inlcude
#include "CBotPostIncExpr.h"
#include "CBotExprVar.h"
#include "CBotStack.h"
#include "CBotVar/CBotVar.h"
// Local include
// Global include
////////////////////////////////////////////////////////////////////////////////
CBotPostIncExpr::CBotPostIncExpr()
{
m_Instr = nullptr;
name = "CBotPostIncExpr";
}
////////////////////////////////////////////////////////////////////////////////
CBotPostIncExpr::~CBotPostIncExpr()
{
delete m_Instr;
}
////////////////////////////////////////////////////////////////////////////////
bool CBotPostIncExpr::Execute(CBotStack* &pj)
{
CBotStack* pile1 = pj->AddStack(this);
CBotStack* pile2 = pile1;
CBotVar* var1 = nullptr;
// retrieves the variable fields and indexes according
if (!(static_cast<CBotExprVar*>(m_Instr))->ExecuteVar(var1, pile2, nullptr, true)) return false;
pile1->SetState(1);
pile1->SetCopyVar(var1); // places the result (before incrementation);
CBotStack* pile3 = pile2->AddStack(this);
if (pile3->IfStep()) return false;
if (var1->IsNAN())
{
pile1->SetError(TX_OPNAN, &m_token);
}
if (!var1->IsDefined())
{
pile1->SetError(TX_NOTINIT, &m_token);
}
if (GetTokenType() == ID_INC) var1->Inc();
else var1->Dec();
return pj->Return(pile1); // operation done, result on pile2
}
////////////////////////////////////////////////////////////////////////////////
void CBotPostIncExpr::RestoreState(CBotStack* &pj, bool bMain)
{
if (!bMain) return;
CBotStack* pile1 = pj->RestoreStack(this);
if (pile1 == nullptr) return;
(static_cast<CBotExprVar*>(m_Instr))->RestoreStateVar(pile1, bMain);
if (pile1 != nullptr) pile1->RestoreStack(this);
}