mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-25 00:43:44 +00:00
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2017 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_INTEGER_INTEGER_DIGITS_HPP
|
|
#define SPROUT_INTEGER_INTEGER_DIGITS_HPP
|
|
|
|
#include <climits>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/type_traits/integral_constant.hpp>
|
|
#include <sprout/type_traits/is_signed.hpp>
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename IntType, long N, long D>
|
|
struct integer_digits_impl
|
|
: public sprout::integral_constant<
|
|
std::size_t,
|
|
(CHAR_BIT * sizeof(IntType) - (sprout::is_signed<IntType>::value ? 1 : 0)) * N / D
|
|
+ ((CHAR_BIT * sizeof(IntType) - (sprout::is_signed<IntType>::value ? 1 : 0)) * N % D ? 1 : 0)
|
|
>
|
|
{};
|
|
} // namespace detail
|
|
|
|
//
|
|
// integer_digits
|
|
//
|
|
template<typename IntType, std::size_t Base = 10>
|
|
struct integer_digits;
|
|
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 2>
|
|
: public sprout::detail::integer_digits_impl<IntType, 1, 1>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 3>
|
|
: public sprout::detail::integer_digits_impl<IntType, 630, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 4>
|
|
: public sprout::detail::integer_digits_impl<IntType, 1, 2>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 5>
|
|
: public sprout::detail::integer_digits_impl<IntType, 430, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 6>
|
|
: public sprout::detail::integer_digits_impl<IntType, 386, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 7>
|
|
: public sprout::detail::integer_digits_impl<IntType, 356, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 8>
|
|
: public sprout::detail::integer_digits_impl<IntType, 1, 3>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 9>
|
|
: public sprout::detail::integer_digits_impl<IntType, 315, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 10>
|
|
: public sprout::detail::integer_digits_impl<IntType, 301, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 11>
|
|
: public sprout::detail::integer_digits_impl<IntType, 289, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 12>
|
|
: public sprout::detail::integer_digits_impl<IntType, 278, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 13>
|
|
: public sprout::detail::integer_digits_impl<IntType, 270, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 14>
|
|
: public sprout::detail::integer_digits_impl<IntType, 262, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 15>
|
|
: public sprout::detail::integer_digits_impl<IntType, 255, 1000>
|
|
{};
|
|
template<typename IntType>
|
|
struct integer_digits<IntType, 16>
|
|
: public sprout::detail::integer_digits_impl<IntType, 1, 4>
|
|
{};
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_INTEGER_INTEGER_DIGITS_HPP
|