59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// Solutions to the Advent Of Code 2024.
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// Copyright (C) 2024 Stefan Müller
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//
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// This program is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. 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 along with
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// this program. If not, see <http://www.gnu.org/licenses/>.
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#include "MullFactorState.h"
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MullFactorState::MullFactorState(const char expected, const int index)
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: expected_{ expected }, index_{ index }, successState_{}, failState_{} {}
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void MullFactorState::enter(StringStateMachine* stateMachine)
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{
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data_->setFactor(index_, 0);
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}
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void MullFactorState::next(StringStateMachine* stateMachine)
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{
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if (stateMachine->getCurrent() == expected_ && data_->getFactor(index_) > 0)
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{
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if (index_ == 2)
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{
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data_->updateResult();
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}
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stateMachine->setState(*successState_);
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}
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else
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{
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int x = stateMachine->getCurrent() - '0';
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if (0 <= x && x <= 9)
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{
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data_->setFactor(index_, data_->getFactor(index_) * 10 + x);
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if (data_->getFactor(index_) > 999)
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{
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stateMachine->setState(*failState_);
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}
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}
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else
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{
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stateMachine->setState(*failState_);
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}
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}
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}
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void MullFactorState::setTransitions(StringState& successState, StringState& failState)
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{
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successState_ = &successState;
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failState_ = &failState;
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}
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