403 lines
14 KiB
C++
403 lines
14 KiB
C++
///\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.
|
|
******************************************************************************/
|
|
|
|
#if 0
|
|
#error THIS HEADER IS A GENERATOR. DO NOT INCLUDE.
|
|
#endif
|
|
|
|
//***************************************************************************
|
|
// THIS FILE HAS BEEN AUTO GENERATED. DO NOT EDIT THIS FILE.
|
|
//***************************************************************************
|
|
|
|
//***************************************************************************
|
|
// To generate to header file, run this at the command line.
|
|
// Note: You will need Python and COG installed.
|
|
//
|
|
// python -m cogapp -d -e -osmallest.h -DNTypes=<n> smallest_generator.h
|
|
// Where <n> is the number of types to support.
|
|
//
|
|
// e.g.
|
|
// To generate handlers for up to 16 types...
|
|
// python -m cogapp -d -e -osmallest.h -DNTypes=16 smallest_generator.h
|
|
//
|
|
// See generate.bat
|
|
//***************************************************************************
|
|
|
|
#ifndef ETL_SMALLEST_INCLUDED
|
|
#define ETL_SMALLEST_INCLUDED
|
|
|
|
#include "platform.h"
|
|
#include "integral_limits.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
///\defgroup smallest smallest
|
|
///\ingroup utilities
|
|
|
|
namespace etl
|
|
{
|
|
#if ETL_USING_CPP11 && !defined(ETL_SMALLEST_TYPE_FORCE_CPP03_IMPLEMENTATION)
|
|
//***************************************************************************
|
|
/// Template to determine the largest type and size.
|
|
/// Defines 'value_type' which is the type of the largest parameter.
|
|
/// Defines 'size' which is the size of the largest parameter.
|
|
///\ingroup largest
|
|
//***************************************************************************
|
|
template <typename T1, typename... TRest>
|
|
class smallest_type
|
|
{
|
|
private:
|
|
|
|
// Define 'smallest_other' as 'smallest_type' with all but the first parameter.
|
|
using smallest_other = typename smallest_type<TRest...>::type;
|
|
|
|
public:
|
|
|
|
// Set 'type' to be the smallest 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<smallest_other>::value), // Boolean
|
|
T1, // TrueType
|
|
smallest_other> // FalseType
|
|
::type; // The smallest type of the two.
|
|
|
|
// The size of the smallest type.
|
|
enum
|
|
{
|
|
size = etl::size_of<type>::value
|
|
};
|
|
};
|
|
|
|
//***************************************************************************
|
|
// Specialisation for one template parameter.
|
|
//***************************************************************************
|
|
template <typename T1>
|
|
class smallest_type<T1>
|
|
{
|
|
public:
|
|
|
|
using type = T1;
|
|
|
|
enum
|
|
{
|
|
size = etl::size_of<type>::value
|
|
};
|
|
};
|
|
|
|
#if ETL_USING_CPP11
|
|
template <typename... T>
|
|
using smallest_type_t = typename smallest_type<T...>::type;
|
|
#endif
|
|
|
|
#if ETL_USING_CPP17
|
|
template <typename... T>
|
|
constexpr size_t smallest_type_v = smallest_type<T...>::size;
|
|
#endif
|
|
|
|
#else
|
|
//***************************************************************************
|
|
/// Template to determine the smallest type and size.
|
|
/// Supports up to 16 types.
|
|
/// Defines 'value_type' which is the type of the smallest parameter.
|
|
/// Defines 'size' which is the size of the smallest parameter.
|
|
///\ingroup smallest
|
|
//***************************************************************************
|
|
template <typename T1, typename T2 = void, typename T3 = void, typename T4 = void,
|
|
typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void,
|
|
typename T9 = void, typename T10 = void, typename T11 = void, typename T12 = void,
|
|
typename T13 = void, typename T14 = void, typename T15 = void, typename T16 = void>
|
|
struct smallest_type
|
|
{
|
|
private:
|
|
|
|
// Declaration.
|
|
template <bool Boolean, typename TrueType, typename FalseType>
|
|
struct choose_type;
|
|
|
|
// Specialisation for 'true'.
|
|
// Defines 'type' as 'TrueType'.
|
|
template <typename TrueType, typename FalseType>
|
|
struct choose_type<true, TrueType, FalseType>
|
|
{
|
|
typedef TrueType type;
|
|
};
|
|
|
|
// Specialisation for 'false'.
|
|
// Defines 'type' as 'FalseType'.
|
|
template <typename TrueType, typename FalseType>
|
|
struct choose_type<false, TrueType, FalseType>
|
|
{
|
|
typedef FalseType type;
|
|
};
|
|
|
|
public:
|
|
|
|
// Define 'smallest_other' as 'smallest_type' with all but the first parameter.
|
|
typedef typename smallest_type<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>::type smallest_other;
|
|
|
|
// Set 'type' to be the smallest of the first parameter and any of the others.
|
|
// This is recursive.
|
|
typedef typename choose_type<(sizeof(T1) < sizeof(smallest_other)), // Boolean
|
|
T1, // TrueType
|
|
smallest_other> // FalseType
|
|
::type type; // The smallest type of the two.
|
|
|
|
// The size of the smallest type.
|
|
enum
|
|
{
|
|
size = sizeof(type)
|
|
};
|
|
};
|
|
|
|
//***************************************************************************
|
|
// Specialisation for one template parameter.
|
|
//***************************************************************************
|
|
template <typename T1>
|
|
struct smallest_type<T1, void, void, void, void, void, void, void,
|
|
void, void, void, void, void, void, void, void>
|
|
{
|
|
typedef T1 type;
|
|
|
|
enum
|
|
{
|
|
size = sizeof(type)
|
|
};
|
|
};
|
|
#endif
|
|
|
|
namespace private_smallest
|
|
{
|
|
//*************************************************************************
|
|
// Determine the type to hold the number of bits based on the index.
|
|
//*************************************************************************
|
|
template <int index>
|
|
struct best_fit_uint_type;
|
|
|
|
//*************************************************************************
|
|
// Less than or equal to 8 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_uint_type<0>
|
|
{
|
|
typedef uint_least8_t type;
|
|
};
|
|
|
|
//*************************************************************************
|
|
// 9 to 16 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_uint_type<1>
|
|
{
|
|
typedef uint_least16_t type;
|
|
};
|
|
|
|
//*************************************************************************
|
|
// 17 to 31 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_uint_type<2>
|
|
{
|
|
typedef uint_least32_t type;
|
|
};
|
|
|
|
#if ETL_USING_64BIT_TYPES
|
|
//*************************************************************************
|
|
// Greater than 32 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_uint_type<3>
|
|
{
|
|
typedef uint_least64_t type;
|
|
};
|
|
#endif
|
|
|
|
//*************************************************************************
|
|
// Determine the type to hold the number of bits based on the index.
|
|
//*************************************************************************
|
|
template <int index>
|
|
struct best_fit_int_type;
|
|
|
|
//*************************************************************************
|
|
// Less than or equal to 8 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_int_type<0>
|
|
{
|
|
typedef int_least8_t type;
|
|
};
|
|
|
|
//*************************************************************************
|
|
// 9 to 16 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_int_type<1>
|
|
{
|
|
typedef int_least16_t type;
|
|
};
|
|
|
|
//*************************************************************************
|
|
// 17 to 31 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_int_type<2>
|
|
{
|
|
typedef int_least32_t type;
|
|
};
|
|
|
|
#if ETL_USING_64BIT_TYPES
|
|
//*************************************************************************
|
|
// Greater than 32 bits.
|
|
//*************************************************************************
|
|
template <>
|
|
struct best_fit_int_type<3>
|
|
{
|
|
typedef int_least64_t type;
|
|
};
|
|
#endif
|
|
}
|
|
|
|
//***************************************************************************
|
|
/// Template to determine the smallest unsigned int type that can contain a
|
|
/// value with the specified number of bits.
|
|
/// Defines 'type' which is the type of the smallest unsigned integer.
|
|
///\ingroup smallest
|
|
//***************************************************************************
|
|
template <size_t NBITS>
|
|
struct smallest_uint_for_bits
|
|
{
|
|
private:
|
|
|
|
// Determines the index of the best unsigned type for the required number of bits.
|
|
static ETL_CONSTANT int TYPE_INDEX = ((NBITS > 8) ? 1 : 0) +
|
|
((NBITS > 16) ? 1 : 0) +
|
|
((NBITS > 32) ? 1 : 0);
|
|
|
|
public:
|
|
|
|
typedef typename private_smallest::best_fit_uint_type<TYPE_INDEX>::type type;
|
|
};
|
|
|
|
template <size_t NBITS>
|
|
ETL_CONSTANT int smallest_uint_for_bits<NBITS>::TYPE_INDEX;
|
|
|
|
#if ETL_USING_CPP11
|
|
template <size_t NBITS>
|
|
using smallest_uint_for_bits_t = typename smallest_uint_for_bits<NBITS>::type;
|
|
#endif
|
|
|
|
//***************************************************************************
|
|
/// Template to determine the smallest signed int type that can contain a
|
|
/// value with the specified number of bits.
|
|
/// Defines 'type' which is the type of the smallest signed integer.
|
|
///\ingroup smallest
|
|
//***************************************************************************
|
|
template <size_t NBITS>
|
|
struct smallest_int_for_bits
|
|
{
|
|
private:
|
|
|
|
// Determines the index of the best unsigned type for the required number of bits.
|
|
static ETL_CONSTANT int TYPE_INDEX = ((NBITS > 8) ? 1 : 0) +
|
|
((NBITS > 16) ? 1 : 0) +
|
|
((NBITS > 32) ? 1 : 0);
|
|
|
|
public:
|
|
|
|
typedef typename private_smallest::best_fit_int_type<TYPE_INDEX>::type type;
|
|
};
|
|
|
|
template <size_t NBITS>
|
|
ETL_CONSTANT int smallest_int_for_bits<NBITS>::TYPE_INDEX;
|
|
|
|
#if ETL_USING_CPP11
|
|
template <size_t NBITS>
|
|
using smallest_int_for_bits_t = typename smallest_int_for_bits<NBITS>::type;
|
|
#endif
|
|
|
|
//***************************************************************************
|
|
/// Template to determine the smallest unsigned int type that can contain the
|
|
/// specified unsigned value.
|
|
/// Defines 'type' which is the type of the smallest unsigned integer.
|
|
///\ingroup smallest
|
|
//***************************************************************************
|
|
template <uintmax_t VALUE>
|
|
struct smallest_uint_for_value
|
|
{
|
|
private:
|
|
|
|
// Determines the index of the best unsigned type for the required value.
|
|
static ETL_CONSTANT int TYPE_INDEX = ((VALUE > UINT_LEAST8_MAX) ? 1 : 0) +
|
|
((VALUE > UINT16_MAX) ? 1 : 0) +
|
|
((VALUE > UINT32_MAX) ? 1 : 0);
|
|
|
|
public:
|
|
|
|
typedef typename private_smallest::best_fit_uint_type<TYPE_INDEX>::type type;
|
|
};
|
|
|
|
template <uintmax_t VALUE>
|
|
ETL_CONSTANT int smallest_uint_for_value<VALUE>::TYPE_INDEX;
|
|
|
|
#if ETL_USING_CPP11
|
|
template <uintmax_t VALUE>
|
|
using smallest_uint_for_value_t = typename smallest_uint_for_value<VALUE>::type;
|
|
#endif
|
|
|
|
//***************************************************************************
|
|
/// Template to determine the smallest int type that can contain the
|
|
/// specified signed value.
|
|
/// Defines 'type' which is the type of the smallest signed integer.
|
|
///\ingroup smallest
|
|
//***************************************************************************
|
|
template <intmax_t VALUE>
|
|
struct smallest_int_for_value
|
|
{
|
|
private:
|
|
|
|
// Determines the index of the best signed type for the required value.
|
|
static ETL_CONSTANT int TYPE_INDEX = (((VALUE > intmax_t(INT_LEAST8_MAX)) || (VALUE < intmax_t(INT_LEAST8_MIN))) ? 1 : 0) +
|
|
(((VALUE > intmax_t(INT16_MAX)) || (VALUE < intmax_t(INT16_MIN))) ? 1 : 0) +
|
|
(((VALUE > intmax_t(INT32_MAX)) || (VALUE < intmax_t(INT32_MIN))) ? 1 : 0);
|
|
|
|
public:
|
|
|
|
typedef typename private_smallest::best_fit_int_type<TYPE_INDEX>::type type;
|
|
};
|
|
|
|
template <intmax_t VALUE>
|
|
ETL_CONSTANT int smallest_int_for_value<VALUE>::TYPE_INDEX;
|
|
|
|
#if ETL_USING_CPP11
|
|
template <intmax_t VALUE>
|
|
using smallest_int_for_value_t = typename smallest_int_for_value<VALUE>::type;
|
|
#endif
|
|
}
|
|
|
|
#endif
|