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4b2b0a4d0e
At this point, the double conversions should really only be implementation details of the KeypadValue class. Therefore, the constructor-from double and conversion-operator-to double of KeypadValue are made private. Instead, the required functionality is provided by KeypadValue itself. The internal implementation is still done using doubles. However, this opens us up to the possibility of having loss-free square root, inversion and division in the future.
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Math.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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class KeypadValue {
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friend class Keypad;
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public:
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KeypadValue(i64, u8);
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KeypadValue(i64);
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explicit KeypadValue(StringView);
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KeypadValue operator+(KeypadValue const&);
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KeypadValue operator-(KeypadValue const&);
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KeypadValue operator*(KeypadValue const&);
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KeypadValue operator-(void) const;
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bool operator<(KeypadValue const&);
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bool operator>(KeypadValue const&);
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bool operator==(KeypadValue const&);
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KeypadValue sqrt() const;
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KeypadValue invert() const;
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KeypadValue operator/(KeypadValue const&);
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private:
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explicit KeypadValue(double);
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explicit operator double() const;
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template<typename T, typename F>
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T operator_helper(KeypadValue const& lhs, KeypadValue const& rhs, F callback);
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// This class represents a pair of a value together with the amount of decimal places that value is offset by.
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// For example, if we were to represent the value -123.55 in this format, m_value would be -12355 and
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// m_decimal_places would be 2, because when you shift -12355 2 digits to the right, you get -123.55.
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// This way, most operations don't have to be performed on doubles, but can be performed without loss of
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// precision on this class.
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i64 m_value { 0 };
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u8 m_decimal_places { 0 };
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};
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