2020-01-18 11:38:21 +03:00
|
|
|
/*
|
2020-01-24 16:45:29 +03:00
|
|
|
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
|
2020-01-18 11:38:21 +03:00
|
|
|
*
|
2021-04-22 11:24:48 +03:00
|
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
2020-01-18 11:38:21 +03:00
|
|
|
*/
|
|
|
|
|
2019-08-09 13:55:20 +03:00
|
|
|
#include "Calculator.h"
|
|
|
|
#include <AK/Assertions.h>
|
2021-07-17 19:29:28 +03:00
|
|
|
#include <AK/Math.h>
|
2019-08-09 13:55:20 +03:00
|
|
|
|
|
|
|
Calculator::Calculator()
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
Calculator::~Calculator()
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
double Calculator::begin_operation(Operation operation, double argument)
|
|
|
|
{
|
|
|
|
double res = 0.0;
|
|
|
|
|
|
|
|
switch (operation) {
|
|
|
|
case Operation::None:
|
2021-02-23 22:42:32 +03:00
|
|
|
VERIFY_NOT_REACHED();
|
2019-08-09 13:55:20 +03:00
|
|
|
|
|
|
|
case Operation::Add:
|
|
|
|
case Operation::Subtract:
|
|
|
|
case Operation::Multiply:
|
|
|
|
case Operation::Divide:
|
|
|
|
m_saved_argument = argument;
|
|
|
|
m_operation_in_progress = operation;
|
|
|
|
return argument;
|
|
|
|
|
|
|
|
case Operation::Sqrt:
|
|
|
|
if (argument < 0.0) {
|
|
|
|
m_has_error = true;
|
|
|
|
return argument;
|
|
|
|
}
|
2021-07-17 19:29:28 +03:00
|
|
|
res = AK::sqrt(argument);
|
2019-08-09 13:55:20 +03:00
|
|
|
clear_operation();
|
|
|
|
break;
|
|
|
|
case Operation::Inverse:
|
|
|
|
if (argument == 0.0) {
|
|
|
|
m_has_error = true;
|
|
|
|
return argument;
|
|
|
|
}
|
|
|
|
res = 1 / argument;
|
|
|
|
clear_operation();
|
|
|
|
break;
|
|
|
|
case Operation::Percent:
|
|
|
|
res = argument * 0.01;
|
|
|
|
break;
|
|
|
|
case Operation::ToggleSign:
|
|
|
|
res = -argument;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case Operation::MemClear:
|
|
|
|
m_mem = 0.0;
|
|
|
|
res = argument;
|
|
|
|
break;
|
|
|
|
case Operation::MemRecall:
|
|
|
|
res = m_mem;
|
|
|
|
break;
|
|
|
|
case Operation::MemSave:
|
|
|
|
m_mem = argument;
|
|
|
|
res = argument;
|
|
|
|
break;
|
|
|
|
case Operation::MemAdd:
|
|
|
|
m_mem += argument;
|
|
|
|
res = m_mem;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
double Calculator::finish_operation(double argument)
|
|
|
|
{
|
|
|
|
double res = 0.0;
|
|
|
|
|
|
|
|
switch (m_operation_in_progress) {
|
|
|
|
case Operation::None:
|
|
|
|
return argument;
|
|
|
|
|
|
|
|
case Operation::Add:
|
|
|
|
res = m_saved_argument + argument;
|
|
|
|
break;
|
|
|
|
case Operation::Subtract:
|
|
|
|
res = m_saved_argument - argument;
|
|
|
|
break;
|
|
|
|
case Operation::Multiply:
|
|
|
|
res = m_saved_argument * argument;
|
|
|
|
break;
|
|
|
|
case Operation::Divide:
|
|
|
|
if (argument == 0.0) {
|
|
|
|
m_has_error = true;
|
|
|
|
return argument;
|
|
|
|
}
|
|
|
|
res = m_saved_argument / argument;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case Operation::Sqrt:
|
|
|
|
case Operation::Inverse:
|
|
|
|
case Operation::Percent:
|
|
|
|
case Operation::ToggleSign:
|
|
|
|
case Operation::MemClear:
|
|
|
|
case Operation::MemRecall:
|
|
|
|
case Operation::MemSave:
|
|
|
|
case Operation::MemAdd:
|
2021-02-23 22:42:32 +03:00
|
|
|
VERIFY_NOT_REACHED();
|
2019-08-09 13:55:20 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
clear_operation();
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Calculator::clear_operation()
|
|
|
|
{
|
|
|
|
m_operation_in_progress = Operation::None;
|
|
|
|
m_saved_argument = 0.0;
|
2020-11-23 11:33:37 +03:00
|
|
|
clear_error();
|
2019-08-09 13:55:20 +03:00
|
|
|
}
|