mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
64 lines
2.9 KiB
C++
64 lines
2.9 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_DETAIL_CHAR_CONVERSION_HPP
|
|
#define SPROUT_DETAIL_CHAR_CONVERSION_HPP
|
|
|
|
#include <stdexcept>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/ctype/ascii.hpp>
|
|
#include <sprout/assert.hpp>
|
|
#include <sprout/static_assert.hpp>
|
|
#include <sprout/detail/char_literal.hpp>
|
|
#include <sprout/detail/char_type_of_consecutive.hpp>
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename Elem, typename IntType>
|
|
inline SPROUT_CONSTEXPR Elem
|
|
int_to_char(IntType val, int base) {
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_digits<Elem>::value);
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_lower_alphabet<Elem>::value);
|
|
return SPROUT_ASSERT(2 <= base && base <= 36), SPROUT_ASSERT(IntType(0) <= val && val < static_cast<IntType>(base)),
|
|
val < 10 ? SPROUT_CHAR_LITERAL('0', Elem) + val
|
|
: SPROUT_CHAR_LITERAL('a', Elem) + (val - 10)
|
|
;
|
|
}
|
|
template<typename Elem, typename IntType>
|
|
inline SPROUT_CONSTEXPR Elem
|
|
int_to_char(IntType val) {
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_digits<Elem>::value);
|
|
return SPROUT_ASSERT(IntType(0) <= val && val < IntType(10)),
|
|
SPROUT_CHAR_LITERAL('0', Elem) + val
|
|
;
|
|
}
|
|
|
|
template<typename IntType, typename Elem>
|
|
inline SPROUT_CONSTEXPR IntType
|
|
char_to_int(Elem c, int base) {
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_digits<Elem>::value);
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_lower_alphabet<Elem>::value);
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_upper_alphabet<Elem>::value);
|
|
return sprout::ascii::isdigit(c) && c - SPROUT_CHAR_LITERAL('0', Elem) < base ? c - SPROUT_CHAR_LITERAL('0', Elem)
|
|
: sprout::ascii::islower(c) && c - SPROUT_CHAR_LITERAL('a', Elem) + 10 < base ? c - SPROUT_CHAR_LITERAL('a', Elem) + 10
|
|
: sprout::ascii::isupper(c) && c - SPROUT_CHAR_LITERAL('A', Elem) + 10 < base ? c - SPROUT_CHAR_LITERAL('A', Elem) + 10
|
|
: static_cast<IntType>(-1)
|
|
;
|
|
}
|
|
template<typename IntType, typename Elem>
|
|
inline SPROUT_CONSTEXPR IntType
|
|
char_to_int(Elem c) {
|
|
SPROUT_STATIC_ASSERT(sprout::detail::is_char_type_of_consecutive_digits<Elem>::value);
|
|
return sprout::ascii::isdigit(c) ? c - SPROUT_CHAR_LITERAL('0', Elem)
|
|
: static_cast<IntType>(-1)
|
|
;
|
|
}
|
|
} // namespace detail
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_DETAIL_CHAR_CONVERSION_HPP
|