Loading...
Searching...
No Matches
largest.h
Go to the documentation of this file.
/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2014 John Wellbelove
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#ifndef ETL_LARGEST_INCLUDED
#define ETL_LARGEST_INCLUDED
#include "platform.h"
#include "smallest.h"
#include "static_assert.h"
#include "type_traits.h"
namespace etl
{
#if ETL_USING_CPP11 && !defined(ETL_LARGEST_TYPE_FORCE_CPP03_IMPLEMENTATION)
//***************************************************************************
//***************************************************************************
template <typename T1, typename... TRest>
class largest_type
{
private:
// Define 'largest_other' as 'largest_type' with all but the first
// parameter.
using largest_other = typename largest_type<TRest...>::type;
public:
// Set 'type' to be the largest of the first parameter and any of the
// others. This is recursive.
using type = typename etl::conditional< (etl::size_of<T1>::value > etl::size_of<largest_other>::value), // Boolean
T1, // TrueType
largest_other> // FalseType
::type; // The largest type of the two.
// The size of the largest type.
enum
{
size = etl::size_of<type>::value
};
};
//***************************************************************************
// Specialisation for one template parameter.
//***************************************************************************
template <typename T1>
class largest_type<T1>
{
public:
using type = T1;
enum
{
size = etl::size_of<type>::value
};
};
#if ETL_USING_CPP11
template <typename... T>
using largest_type_t = typename largest_type<T...>::type;
#endif
#if ETL_USING_CPP17
template <typename... T>
constexpr size_t largest_type_v = largest_type<T...>::size;
#endif
#else
#include "private/largest_type_cpp03.h"
#endif
#if ETL_USING_CPP11 && !defined(ETL_LARGEST_ALIGNMENT_FORCE_CPP03_IMPLEMENTATION)
//***************************************************************************
//***************************************************************************
template <typename T1, typename... TRest>
struct largest_alignment
{
// Define 'largest_other' as 'largest_type' with all but the first
// parameter.
using largest_other = typename largest_alignment<TRest...>::type;
// Set 'type' to be the largest of the first parameter and any of the
// others. This is recursive.
using type = typename etl::conditional< (etl::alignment_of<T1>::value > etl::alignment_of<largest_other>::value), // Boolean
T1, // TrueType
largest_other> // FalseType
::type; // The largest type of the two.
// The largest alignment.
enum
{
value = etl::alignment_of<type>::value
};
};
//***************************************************************************
// Specialisation for one template parameter.
//***************************************************************************
template <typename T1>
struct largest_alignment<T1>
{
typedef T1 type;
enum
{
value = etl::alignment_of<type>::value
};
};
#if ETL_USING_CPP17
template <typename... T>
inline constexpr size_t largest_alignment_v = largest_alignment<T...>::value;
#endif
#else
#include "private/largest_alignment_cpp03.h"
#endif
//***************************************************************************
//***************************************************************************
template <typename T>
struct larger_int_type
{
ETL_STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
typedef typename etl::smallest_int_for_bits< etl::integral_limits<typename etl::make_signed<T>::type>::bits + 1>::type type;
};
#if ETL_USING_CPP11
template <typename T>
using larger_int_type_t = typename larger_int_type<T>::type;
#endif
//***************************************************************************
//***************************************************************************
template <typename T>
struct larger_uint_type
{
ETL_STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
typedef typename etl::smallest_uint_for_bits< etl::integral_limits<typename etl::make_unsigned<T>::type>::bits + 1>::type type;
};
#if ETL_USING_CPP11
template <typename T>
using larger_uint_type_t = typename larger_uint_type<T>::type;
#endif
//***************************************************************************
//***************************************************************************
template <typename T, bool IS_SIGNED = etl::is_signed<T>::value>
struct larger_type;
template <typename T>
struct larger_type<T, false>
{
ETL_STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
typedef typename etl::smallest_uint_for_bits<etl::integral_limits<T>::bits + 1>::type type;
};
template <typename T>
struct larger_type<T, true>
{
ETL_STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
typedef typename etl::smallest_int_for_bits<etl::integral_limits<T>::bits + 1>::type type;
};
#if ETL_USING_CPP11
template <typename T>
using larger_type_t = typename larger_type<T>::type;
#endif
#if ETL_USING_CPP11 && !defined(ETL_LARGEST_FORCE_CPP03_IMPLEMENTATION)
//***************************************************************************
//***************************************************************************
template <typename... T>
struct largest
{
using type = typename etl::largest_type<T...>::type;
enum
{
size = etl::largest_type<T...>::size,
alignment = etl::largest_alignment<T...>::value
};
};
#if ETL_USING_CPP11
template <typename... T>
using largest_t = typename largest<T...>::type;
#endif
#if ETL_USING_CPP17
template <typename... T>
inline constexpr size_t largest_size = largest<T...>::size;
#endif
#else
#include "private/largest_cpp03.h"
#endif
} // namespace etl
#endif
type
etl::larger_type
Definition largest.h:199
etl::larger_uint_type
Definition largest.h:181
etl::largest
Definition largest.h:45
etl::largest_alignment
Definition largest.h:45
etl::largest_type
Definition largest.h:46
largest_type
Definition largest_type_cpp03.h:45
etl::smallest_int_for_bits
Definition smallest.h:233
etl::smallest_uint_for_bits
Definition smallest.h:205
etl
Definition absolute.h:40
etl::size
ETL_CONSTEXPR TContainer::size_type size(const TContainer &container)
Definition iterator.h:1434
platform.h
smallest.h
etl::larger_int_type
\ingroup largest
Definition largest.h:163
etl::type
type_traits.h