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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibCrypto/BigFraction/BigFraction.h>
// This type implements the regular calculator
// behavior, such as performing arithmetic
// operations and providing a memory cell.
// It does not deal with number input; you
// have to pass in already parsed double
// values.
class Calculator final {
public:
Calculator() = default;
~Calculator() = default;
enum class Operation {
None,
Add,
Subtract,
Multiply,
Divide,
Sqrt,
Inverse,
Percent,
ToggleSign,
MemClear,
MemRecall,
MemSave,
MemAdd
};
Crypto::BigFraction begin_operation(Operation, Crypto::BigFraction);
Crypto::BigFraction finish_operation(Crypto::BigFraction);
bool has_error() const { return m_has_error; }
void clear_operation();
void clear_error() { m_has_error = false; }
private:
Operation m_operation_in_progress { Operation::None };
Crypto::BigFraction m_saved_argument {};
Crypto::BigFraction m_mem {};
bool m_has_error { false };
};
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