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Initial experimental unaligned fundamental types
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John Wellbelove
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commit
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@ -86,9 +86,9 @@ namespace etl
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private:
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static etl::endian get()
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ETL_CONSTEXPR static etl::endian get()
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{
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static const union U
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static ETL_CONSTANT union U
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{
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U()
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: ui32(0x12345678UL)
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152
include/etl/unaligned_type.h
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152
include/etl/unaligned_type.h
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@ -0,0 +1,152 @@
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///\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 jwellbelove
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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_UNALIGNED_TYPE_INCLUDED
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#define ETL_UNALIGNED_TYPE_INCLUDED
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///\defgroup unaligned_types unaligned_types
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/// Unaligned types utilities
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///\ingroup utilities
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#include "platform.h"
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#include "type_traits.h"
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#include "endianness.h"
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namespace etl
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{
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template <typename T, etl::endian Endian, typename = typename etl::enable_if<etl::is_fundamental<T>::value, void>::type>
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class unaligned_type
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{
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public:
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typedef type T;
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//*************************************************************************
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///
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//*************************************************************************
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unaligned_type(T value)
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{
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// Same as host?
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if (Endian != etl::endianness::get())
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{
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value = etl::reverse_bytes(value);
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}
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mempy(storage, &value, sizeof(T));
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}
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//*************************************************************************
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///
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//*************************************************************************
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operator T() const
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{
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T value;
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mempy(&value, storage, sizeof(T));
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// Same as host?
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if (Endian != etl::endianness::get())
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{
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value = etl::reverse_bytes(value);
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}
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return value;
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}
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private:
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char storage[sizeof(T)];
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};
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// Network Order
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typedef unaligned_type<char, etl::endian::big> net_char_t;
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typedef unaligned_type<signed char, etl::endian::big> net_schar_t;
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typedef unaligned_type<unsigned char, etl::endian::big> net_uchar_t;
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typedef unaligned_type<short, etl::endian::big> net_short_t;
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typedef unaligned_type<unsigned short, etl::endian::big> net_unsigned_short_t;
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typedef unaligned_type<int, etl::endian::big> net_int_t;
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typedef unaligned_type<unsigned int, etl::endian::big> net_unsigned_int_t;
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typedef unaligned_type<long, etl::endian::big> net_long_t;
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typedef unaligned_type<unsigned long, etl::endian::big> net_unsigned_long_t;
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typedef unaligned_type<long long, etl::endian::big> net_long_long_t;
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typedef unaligned_type<unsigned long long, etl::endian::big> net_unsigned_long_long_t;
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#if ETL_8BIT_SUPPORT
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typedef unaligned_type<int8_t, etl::endian::big> net_int8_t_t;
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typedef unaligned_type<uint8_t, etl::endian::big> net_uint8_t_t;
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#endif
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typedef unaligned_type<int16_t, etl::endian::big> net_int16_t_t;
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typedef unaligned_type<uint16_t, etl::endian::big> net_uint16_t_t;
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typedef unaligned_type<int32_t, etl::endian::big> net_int32_t_t;
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typedef unaligned_type<uint32_t, etl::endian::big> net_uint32_t_t;
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#if ETL_USING_64BIT_TYPES
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typedef unaligned_type<int64_t, etl::endian::big> net_int64_t_t;
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typedef unaligned_type<uint64_t, etl::endian::big> net_uint64_t_t;
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#endif
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typedef unaligned_type<float, etl::endian::big> net_float_t;
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typedef unaligned_type<double, etl::endian::big> net_double_t;
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typedef unaligned_type<long double, etl::endian::big> net_long_double_t;
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#if ETL_CPP11_SUPPORTED
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// Host order
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typedef unaligned_type<char, etl::endian::get()> host_char_t;
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typedef unaligned_type<signed char, etl::endian::get()> host_schar_t;
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typedef unaligned_type<unsigned char, etl::endian::get()> host_uchar_t;
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typedef unaligned_type<short, etl::endian::get()> host_short_t;
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typedef unaligned_type<unsigned short, etl::endian::get()> host_unsigned_short_t;
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typedef unaligned_type<int, etl::endian::get()> host_int_t;
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typedef unaligned_type<unsigned int, etl::endian::get()> host_unsigned_int_t;
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typedef unaligned_type<long, etl::endian::get()> host_long_t;
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typedef unaligned_type<unsigned long, etl::endian::get()> host_unsigned_long_t;
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typedef unaligned_type<long long, etl::endian::get()> host_long_long_t;
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typedef unaligned_type<unsigned long long, etl::endian::get()> host_unsigned_long_long_t;
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#if ETL_8BIT_SUPPORT
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typedef unaligned_type<int8_t, etl::endian::get()> host_int8_t_t;
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typedef unaligned_type<uint8_t, etl::endian::get()> host_uint8_t_t;
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#endif
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typedef unaligned_type<int16_t, etl::endian::get()> host_int16_t_t;
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typedef unaligned_type<uint16_t, etl::endian::get()> host_uint16_t_t;
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typedef unaligned_type<int32_t, etl::endian::get()> host_int32_t_t;
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typedef unaligned_type<uint32_t, etl::endian::get()> host_uint32_t_t;
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#if ETL_USING_64BIT_TYPES
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typedef unaligned_type<int64_t, etl::endian::get()> host_int64_t_t;
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typedef unaligned_type<uint64_t, etl::endian::get()> host_uint64_t_t;
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#endif
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typedef unaligned_type<float, etl::endian::get()> host_float_t;
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typedef unaligned_type<double, etl::endian::get()> host_double_t;
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typedef unaligned_type<long double, etl::endian::get()> host_long_double_t;
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#endif
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#if ETL_CPP11_SUPPORTED
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template <typename T>
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using unaligned_type_t = typename etl::unaligned_type<T>::type
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#endif
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}
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#endif
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