Sprout/sprout/weed/detail/xdigits.hpp
2014-01-08 16:48:12 +09:00

123 lines
4.2 KiB
C++

/*=============================================================================
Copyright (c) 2011-2014 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_WEED_DETAIL_XDIGITS_HPP
#define SPROUT_WEED_DETAIL_XDIGITS_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/string.hpp>
#include <sprout/array/array.hpp>
#include <sprout/tuple/tuple.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/find.hpp>
namespace sprout {
namespace weed {
namespace detail {
template<typename Elem>
struct xdigits;
template<>
struct xdigits<char> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char, 22> table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string("0123456789abcdefABCDEF"))
;
};
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char, 22> sprout::weed::detail::xdigits<char>::table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string("0123456789abcdefABCDEF"))
;
template<>
struct xdigits<wchar_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<wchar_t, 22> table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(L"0123456789abcdefABCDEF"))
;
};
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<wchar_t, 22> sprout::weed::detail::xdigits<wchar_t>::table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(L"0123456789abcdefABCDEF"))
;
#if SPROUT_USE_UNICODE_LITERALS
template<>
struct xdigits<char16_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char16_t, 22> table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(u"0123456789abcdefABCDEF"))
;
};
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char16_t, 22> sprout::weed::detail::xdigits<char16_t>::table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(u"0123456789abcdefABCDEF"))
;
template<>
struct xdigits<char32_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char32_t, 22> table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(sprout::to_string(U"0123456789abcdefABCDEF"))
;
};
SPROUT_CONSTEXPR_OR_CONST sprout::basic_string<char32_t, 22> sprout::weed::detail::xdigits<char32_t>::table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(sprout::to_string(U"0123456789abcdefABCDEF"))
;
#endif
template<typename Dummy>
struct xvalues;
# define SPROUT_WEED_XDIGITS_TABLE_DEF \
table_type{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13, 14, 15}}
template<>
struct xvalues<void> {
public:
typedef sprout::array<std::uint8_t, 22> table_type;
public:
SPROUT_STATIC_CONSTEXPR table_type table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(SPROUT_WEED_XDIGITS_TABLE_DEF)
;
};
SPROUT_CONSTEXPR_OR_CONST sprout::weed::detail::xvalues<void>::table_type
sprout::weed::detail::xvalues<void>::table
SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(SPROUT_WEED_XDIGITS_TABLE_DEF)
;
# undef SPROUT_WEED_XDIGITS_TABLE_DEF
template<typename IntType>
inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> xvalue_at(std::size_t i) {
return i < 22
? sprout::tuples::tuple<IntType, bool>(
static_cast<IntType>(sprout::weed::detail::xvalues<void>::table[i]),
true
)
: sprout::tuples::tuple<IntType, bool>(
IntType(),
false
)
;
}
template<typename IntType, typename Elem>
inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> from_xdigit(Elem c) {
return sprout::weed::detail::xvalue_at<IntType>(
sprout::distance(
sprout::weed::detail::xdigits<Elem>::table.begin(),
sprout::find(
sprout::weed::detail::xdigits<Elem>::table.begin(),
sprout::weed::detail::xdigits<Elem>::table.end(),
c
)
)
);
}
} // namespace detail
} // namespace weed
} // namespace sprout
#endif // #ifndef SPROUT_WEED_DETAIL_XDIGITS_HPP