colobot/src/CBot/CBotInstr/CBotPreIncExpr.cpp

104 lines
2.9 KiB
C++

/*
* This file is part of the Colobot: Gold Edition source code
* Copyright (C) 2001-2018, 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
*/
#include "CBot/CBotInstr/CBotPreIncExpr.h"
#include "CBot/CBotInstr/CBotExprVar.h"
#include "CBot/CBotStack.h"
#include "CBot/CBotVar/CBotVar.h"
namespace CBot
{
////////////////////////////////////////////////////////////////////////////////
CBotPreIncExpr::CBotPreIncExpr()
{
m_instr = nullptr;
}
////////////////////////////////////////////////////////////////////////////////
CBotPreIncExpr::~CBotPreIncExpr()
{
delete m_instr;
}
////////////////////////////////////////////////////////////////////////////////
bool CBotPreIncExpr::Execute(CBotStack* &pj)
{
CBotStack* pile = pj->AddStack(this);
if (pile->IfStep()) return false;
CBotVar* var1;
if (pile->GetState() == 0)
{
CBotStack* pile2 = pile;
// retrieves the variable fields and indexes according
// pile2 is modified on return
if (!(static_cast<CBotExprVar*>(m_instr))->ExecuteVar(var1, pile2, nullptr, true)) return false;
if (var1->IsNAN())
{
pile->SetError(CBotErrNan, &m_token);
return pj->Return(pile); // operation performed
}
if (!var1->IsDefined())
{
pile->SetError(CBotErrNotInit, &m_token);
return pj->Return(pile); // operation performed
}
if (GetTokenType() == ID_INC) var1->Inc();
else var1->Dec(); // ((CBotVarInt*)var1)->m_val
pile->IncState();
}
if (!m_instr->Execute(pile)) return false;
return pj->Return(pile); // operation performed
}
////////////////////////////////////////////////////////////////////////////////
void CBotPreIncExpr::RestoreState(CBotStack* &pj, bool bMain)
{
if (!bMain) return;
CBotStack* pile = pj->RestoreStack(this);
if (pile == nullptr) return;
if (pile->GetState() == 0)
{
return;
}
m_instr->RestoreState(pile, bMain);
}
std::map<std::string, CBotInstr*> CBotPreIncExpr::GetDebugLinks()
{
auto links = CBotInstr::GetDebugLinks();
links["m_instr"] = m_instr;
return links;
}
} // namespace CBot