324 lines
11 KiB
C++
324 lines
11 KiB
C++
///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2022 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_BYTE_INCLUDED
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#define ETL_BYTE_INCLUDED
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#include "platform.h"
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#include "type_traits.h"
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namespace etl
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{
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#if ETL_USING_CPP11 && !defined(ETL_BYTE_FORCE_CPP03_IMPLEMENTATION)
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enum class byte : unsigned char {};
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//*************************************************************************
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/// To integer.
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//*************************************************************************
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template <typename TInteger>
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constexpr
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typename etl::enable_if<etl::is_integral<TInteger>::value, TInteger>::type
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to_integer(etl::byte b) noexcept
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{
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return TInteger(b);
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}
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//*************************************************************************
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/// Shift left.
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//*************************************************************************
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template <typename TInteger>
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constexpr
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte>::type
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operator <<(etl::byte b, TInteger shift) noexcept
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{
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return etl::byte(static_cast<unsigned int>(b) << shift);
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}
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//*************************************************************************
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/// Shift right
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//*************************************************************************
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template <typename TInteger>
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constexpr
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte>::type
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operator >>(etl::byte b, TInteger shift) noexcept
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{
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return etl::byte(static_cast<unsigned int>(b) >> shift);
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}
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//*************************************************************************
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/// Shift left equals.
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//*************************************************************************
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template <typename TInteger>
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constexpr
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte&>::type
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operator <<=(etl::byte& b, TInteger shift) noexcept
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{
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return b = b << shift;;
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}
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//*************************************************************************
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/// Shift right equals.
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//*************************************************************************
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template <typename TInteger>
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constexpr
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte&>::type
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operator >>=(etl::byte& b, TInteger shift) noexcept
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{
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return b = b >> shift;
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}
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//*************************************************************************
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/// Or.
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//*************************************************************************
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inline constexpr etl::byte operator |(etl::byte lhs, etl::byte rhs) noexcept
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{
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return etl::byte(static_cast<unsigned int>(lhs) | static_cast<unsigned int>(rhs));
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}
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//*************************************************************************
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/// And.
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//*************************************************************************
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inline constexpr etl::byte operator &(etl::byte lhs, etl::byte rhs) noexcept
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{
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return etl::byte(static_cast<unsigned int>(lhs) & static_cast<unsigned int>(rhs));
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}
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//*************************************************************************
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/// Exclusive Or.
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//*************************************************************************
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inline constexpr etl::byte operator ^(etl::byte lhs, etl::byte rhs) noexcept
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{
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return etl::byte(static_cast<unsigned int>(lhs) ^ static_cast<unsigned int>(rhs));
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}
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//*************************************************************************
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/// Or equals.
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//*************************************************************************
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inline ETL_CONSTEXPR14 etl::byte& operator |=(etl::byte& lhs, etl::byte rhs) noexcept
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{
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return lhs = lhs | rhs;
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}
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//*************************************************************************
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/// And equals
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//*************************************************************************
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inline ETL_CONSTEXPR14 etl::byte& operator &=(etl::byte& lhs, etl::byte rhs) noexcept
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{
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return lhs = lhs & rhs;
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}
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//*************************************************************************
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/// Exclusive or equals.
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//*************************************************************************
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inline ETL_CONSTEXPR14 etl::byte& operator ^=(etl::byte& lhs, etl::byte rhs) noexcept
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{
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return lhs = lhs ^ rhs;
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}
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//*************************************************************************
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/// Not.
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//*************************************************************************
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inline constexpr etl::byte operator ~(etl::byte b) noexcept
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{
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return etl::byte(~static_cast<unsigned int>(b));
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}
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#else
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//*************************************************************************
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/// The byte class.
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//*************************************************************************
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class byte
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{
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public:
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// Friend functions
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template <typename TInteger>
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friend
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typename etl::enable_if<etl::is_integral<TInteger>::value, TInteger>::type
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to_integer(etl::byte b);
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friend bool operator ==(etl::byte lhs, etl::byte rhs);
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// Default constructor
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byte()
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: value(0U)
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{
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}
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// Construct from a value castable to unsigned char
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template <typename T>
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explicit byte(T v)
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: value(static_cast<unsigned char>(v))
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{
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}
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// Cast to a T
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template <typename T>
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operator T() const
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{
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return static_cast<T>(value);
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}
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private:
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// The byte value
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unsigned char value;
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};
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//*************************************************************************
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/// Equality test
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//*************************************************************************
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inline bool operator ==(etl::byte lhs, etl::byte rhs)
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{
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return (lhs.value == rhs.value);
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}
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//*************************************************************************
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/// Inequality test
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//*************************************************************************
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inline bool operator !=(etl::byte lhs, etl::byte rhs)
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{
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return !(lhs == rhs);
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}
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//*************************************************************************
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/// To integer.
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//*************************************************************************
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template <typename TInteger>
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typename etl::enable_if<etl::is_integral<TInteger>::value, TInteger>::type
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to_integer(etl::byte b)
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{
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return TInteger(b);
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}
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//*************************************************************************
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/// Shift left.
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//*************************************************************************
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template <typename TInteger>
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte>::type
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operator <<(etl::byte b, TInteger shift)
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{
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return etl::byte(to_integer<unsigned int>(b) << shift);
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}
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//*************************************************************************
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/// Shift right
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//*************************************************************************
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template <typename TInteger>
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte>::type
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operator >>(etl::byte b, TInteger shift)
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{
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return etl::byte(to_integer<unsigned int>(b) >> shift);
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}
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//*************************************************************************
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/// Shift left equals.
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//*************************************************************************
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template <typename TInteger>
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte&>::type
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operator <<=(etl::byte& b, TInteger shift)
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{
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b = b << shift;
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return b;
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}
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//*************************************************************************
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/// Shift right equals.
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//*************************************************************************
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template <typename TInteger>
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typename etl::enable_if<etl::is_integral<TInteger>::value, etl::byte&>::type
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operator >>=(etl::byte& b, TInteger shift)
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{
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b = b >> shift;
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return b;
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}
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//*************************************************************************
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/// Or.
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//*************************************************************************
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inline etl::byte operator |(etl::byte lhs, etl::byte rhs)
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{
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return etl::byte(to_integer<unsigned int>(lhs) | to_integer<unsigned int>(rhs));
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}
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//*************************************************************************
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/// And.
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//*************************************************************************
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inline etl::byte operator &(etl::byte lhs, etl::byte rhs)
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{
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return etl::byte(to_integer<unsigned int>(lhs) & to_integer<unsigned int>(rhs));
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}
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//*************************************************************************
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/// Exclusive Or.
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//*************************************************************************
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inline etl::byte operator ^(etl::byte lhs, etl::byte rhs)
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{
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return etl::byte(to_integer<unsigned int>(lhs) ^ to_integer<unsigned int>(rhs));
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}
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//*************************************************************************
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/// Or equals.
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//*************************************************************************
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inline etl::byte& operator |=(etl::byte& lhs, etl::byte rhs)
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{
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return lhs = lhs | rhs;
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}
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//*************************************************************************
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/// And equals
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//*************************************************************************
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inline etl::byte& operator &=(etl::byte& lhs, etl::byte rhs)
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{
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return lhs = lhs & rhs;
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}
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//*************************************************************************
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/// Exclusive or equals.
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//*************************************************************************
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inline etl::byte& operator ^=(etl::byte& lhs, etl::byte rhs)
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{
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return lhs = lhs ^ rhs;
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}
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//*************************************************************************
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/// Not.
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//*************************************************************************
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inline etl::byte operator ~(etl::byte b)
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{
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return etl::byte(~to_integer<unsigned char>(b));
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}
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#endif
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}
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#endif
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