mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2015 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_WEED_DETAIL_XDIGITS_HPP
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#define SPROUT_WEED_DETAIL_XDIGITS_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/string.hpp>
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#include <sprout/array/array.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/algorithm/find.hpp>
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#include <sprout/detail/literal_def.hpp>
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namespace sprout {
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namespace weed {
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namespace detail {
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SPROUT_LITERAL_STRING_DEF(xdigits, "0123456789abcdefABCDEF", 22);
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template<typename Dummy>
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struct xvalues;
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# define SPROUT_WEED_XDIGITS_TABLE_DEF \
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{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13, 14, 15}}
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template<>
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struct xvalues<void> {
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public:
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typedef sprout::array<std::uint8_t, 22> value_type;
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public:
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SPROUT_STATIC_CONSTEXPR value_type value
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SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_INNER(SPROUT_WEED_XDIGITS_TABLE_DEF)
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;
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};
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SPROUT_CONSTEXPR_OR_CONST sprout::weed::detail::xvalues<void>::value_type
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sprout::weed::detail::xvalues<void>::value
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SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(SPROUT_WEED_XDIGITS_TABLE_DEF)
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;
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# undef SPROUT_WEED_XDIGITS_TABLE_DEF
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template<typename IntType>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> xvalue_at(std::size_t i) {
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return i < 22
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? sprout::tuples::tuple<IntType, bool>(
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static_cast<IntType>(sprout::weed::detail::xvalues<void>::value[i]),
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true
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)
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: sprout::tuples::tuple<IntType, bool>(
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IntType(),
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false
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)
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;
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}
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template<typename IntType, typename Elem>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<IntType, bool> from_xdigit(Elem c) {
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return sprout::weed::detail::xvalue_at<IntType>(
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sprout::distance(
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sprout::weed::detail::xdigits<Elem>::value.begin(),
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sprout::find(
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sprout::weed::detail::xdigits<Elem>::value.begin(),
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sprout::weed::detail::xdigits<Elem>::value.end(),
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c
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)
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)
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);
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}
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} // namespace detail
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_DETAIL_XDIGITS_HPP
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