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sprout/weed.hpp 追加

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bolero-MURAKAMI 2011-11-13 17:54:38 +09:00
parent 8103682fdb
commit ecfc2b297a
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sprout/weed/detail/xdigits.hpp Normal file
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#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.hpp>
#include <sprout/tuple/tuple.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::to_string("0123456789abcdefABCDEF");
};
SPROUT_CONSTEXPR sprout::basic_string<char, 22> sprout::weed::detail::xdigits<char>::table;
template<>
struct xdigits<wchar_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<wchar_t, 22> table = sprout::to_string(L"0123456789abcdefABCDEF");
};
SPROUT_CONSTEXPR sprout::basic_string<wchar_t, 22> sprout::weed::detail::xdigits<wchar_t>::table;
template<>
struct xdigits<char16_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char16_t, 22> table = sprout::to_string(u"0123456789abcdefABCDEF");
};
SPROUT_CONSTEXPR sprout::basic_string<char16_t, 22> sprout::weed::detail::xdigits<char16_t>::table;
template<>
struct xdigits<char32_t> {
public:
SPROUT_STATIC_CONSTEXPR sprout::basic_string<char32_t, 22> table = sprout::to_string(U"0123456789abcdefABCDEF");
};
SPROUT_CONSTEXPR sprout::basic_string<char32_t, 22> sprout::weed::detail::xdigits<char32_t>::table;
template<typename Dummy>
struct xvalues;
template<>
struct xvalues<void> {
public:
SPROUT_STATIC_CONSTEXPR sprout::array<std::uint8_t, 22> table = sprout::array<std::uint8_t, 22>{
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13, 14, 15}
};
};
SPROUT_CONSTEXPR sprout::array<std::uint8_t, 22> sprout::weed::detail::xvalues<void>::table;
template<typename IntType>
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>
SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> from_xdigit(Elem c) {
return sprout::weed::detail::xvalue_at<IntType>(
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(
sprout::weed::detail::xdigits<Elem>::table.begin(),
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::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