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ed46d52252
AK's version should see better inlining behaviors, than the LibM one. We avoid mixed usage for now though. Also clean up some stale math includes and improper floatingpoint usage.
124 lines
2.6 KiB
C++
124 lines
2.6 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Calculator.h"
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#include <AK/Assertions.h>
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#include <AK/Math.h>
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Calculator::Calculator()
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{
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}
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Calculator::~Calculator()
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{
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}
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double Calculator::begin_operation(Operation operation, double argument)
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{
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double res = 0.0;
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switch (operation) {
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case Operation::None:
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VERIFY_NOT_REACHED();
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case Operation::Add:
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case Operation::Subtract:
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case Operation::Multiply:
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case Operation::Divide:
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m_saved_argument = argument;
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m_operation_in_progress = operation;
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return argument;
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case Operation::Sqrt:
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if (argument < 0.0) {
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m_has_error = true;
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return argument;
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}
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res = AK::sqrt(argument);
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clear_operation();
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break;
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case Operation::Inverse:
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if (argument == 0.0) {
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m_has_error = true;
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return argument;
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}
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res = 1 / argument;
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clear_operation();
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break;
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case Operation::Percent:
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res = argument * 0.01;
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break;
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case Operation::ToggleSign:
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res = -argument;
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break;
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case Operation::MemClear:
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m_mem = 0.0;
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res = argument;
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break;
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case Operation::MemRecall:
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res = m_mem;
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break;
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case Operation::MemSave:
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m_mem = argument;
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res = argument;
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break;
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case Operation::MemAdd:
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m_mem += argument;
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res = m_mem;
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break;
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}
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return res;
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}
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double Calculator::finish_operation(double argument)
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{
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double res = 0.0;
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switch (m_operation_in_progress) {
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case Operation::None:
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return argument;
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case Operation::Add:
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res = m_saved_argument + argument;
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break;
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case Operation::Subtract:
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res = m_saved_argument - argument;
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break;
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case Operation::Multiply:
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res = m_saved_argument * argument;
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break;
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case Operation::Divide:
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if (argument == 0.0) {
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m_has_error = true;
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return argument;
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}
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res = m_saved_argument / argument;
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break;
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case Operation::Sqrt:
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case Operation::Inverse:
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case Operation::Percent:
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case Operation::ToggleSign:
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case Operation::MemClear:
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case Operation::MemRecall:
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case Operation::MemSave:
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case Operation::MemAdd:
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VERIFY_NOT_REACHED();
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}
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clear_operation();
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return res;
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}
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void Calculator::clear_operation()
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{
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m_operation_in_progress = Operation::None;
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m_saved_argument = 0.0;
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clear_error();
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}
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