122 lines
2.8 KiB
C++
122 lines
2.8 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <cinttypes>
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#include <type_traits>
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namespace OpenVulkano
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{
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class int24 final
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{
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uint8_t m_internal[3];
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public:
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constexpr int24() : m_internal{ 0, 0, 0 }
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{}
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constexpr int24(const int val)
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: m_internal{(uint8_t)(val & 0xff), (uint8_t)((val >> 8) & 0xff), (uint8_t)((val >> 16) & 0xff)}
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{}
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constexpr int24(const int24& val) : m_internal{ val.m_internal[0], val.m_internal[1], val.m_internal[2] }
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{}
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operator int() const
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{
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if (m_internal[2] & 0x80)
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{ // Negative numbers
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return (0xff << 24) | (m_internal[2] << 16) | (m_internal[1] << 8) | (m_internal[0] << 0);
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}
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else
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{
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return (m_internal[2] << 16) | (m_internal[1] << 8) | (m_internal[0] << 0);
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}
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}
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operator float() const
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{
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return (float)this->operator int();
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}
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int24& operator =(const int24& input)
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{
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m_internal[0] = input.m_internal[0];
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m_internal[1] = input.m_internal[1];
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m_internal[2] = input.m_internal[2];
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return *this;
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}
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int24& operator =(const int input)
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{
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m_internal[0] = ((unsigned char*)&input)[0];
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m_internal[1] = ((unsigned char*)&input)[1];
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m_internal[2] = ((unsigned char*)&input)[2];
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return *this;
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}
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#define INT24_OPERATORS(op) \
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template<typename T, std::enable_if_t<std::is_convertible_v<T, int>, bool> = true> \
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int24 operator op(const T& val) const { return int24( (int)*this op static_cast<int>(val) ); } \
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template<typename T, std::enable_if_t<std::is_convertible_v<T, int>, bool> = true> \
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int24& operator op##=(const T& val ) { *this = *this op static_cast<int>(val); return *this; }
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INT24_OPERATORS(+)
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INT24_OPERATORS(-)
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INT24_OPERATORS(*)
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INT24_OPERATORS(/)
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#undef INT24_OPERATORS
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int24 operator >>(const int val) const
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{
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return int24( (int)*this >> val );
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}
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int24 operator <<(const int val) const
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{
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return int24( (int)*this << val );
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}
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int24& operator >>=(const int val )
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{
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*this = *this >> val;
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return *this;
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}
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int24& operator <<=(const int val )
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{
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*this = *this << val;
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return *this;
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}
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operator bool() const
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{
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return (int)*this != 0;
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}
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bool operator !() const
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{
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return !((int)*this);
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}
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int24 operator -()
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{
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return int24( -(int)*this );
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}
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template<typename T, std::enable_if_t<std::is_convertible_v<T, int>, bool> = true>
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[[nodiscard]] bool operator==(const T& val) const
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{
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return static_cast<int>(*this) == static_cast<int>(val);
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}
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template<typename T, std::enable_if_t<std::is_convertible_v<T, int>, bool> = true>
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[[nodiscard]] constexpr auto operator<=>(const T& other) const
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{
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return operator int() <=> static_cast<int>(other);
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}
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};
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} |