| /////////////////////////////////////////////////////////////// |
| // Copyright 2013 John Maddock. 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_ |
| |
| #ifndef BOOST_MP_CPP_INT_LITERALS_HPP |
| #define BOOST_MP_CPP_INT_LITERALS_HPP |
| |
| #include <boost/multiprecision/cpp_int/cpp_int_config.hpp> |
| |
| namespace boost{ namespace multiprecision{ |
| |
| namespace literals{ namespace detail{ |
| |
| template <char> struct hex_value; |
| template <> struct hex_value<'0'> { static constexpr limb_type value = 0; }; |
| template <> struct hex_value<'1'> { static constexpr limb_type value = 1; }; |
| template <> struct hex_value<'2'> { static constexpr limb_type value = 2; }; |
| template <> struct hex_value<'3'> { static constexpr limb_type value = 3; }; |
| template <> struct hex_value<'4'> { static constexpr limb_type value = 4; }; |
| template <> struct hex_value<'5'> { static constexpr limb_type value = 5; }; |
| template <> struct hex_value<'6'> { static constexpr limb_type value = 6; }; |
| template <> struct hex_value<'7'> { static constexpr limb_type value = 7; }; |
| template <> struct hex_value<'8'> { static constexpr limb_type value = 8; }; |
| template <> struct hex_value<'9'> { static constexpr limb_type value = 9; }; |
| template <> struct hex_value<'a'> { static constexpr limb_type value = 10; }; |
| template <> struct hex_value<'b'> { static constexpr limb_type value = 11; }; |
| template <> struct hex_value<'c'> { static constexpr limb_type value = 12; }; |
| template <> struct hex_value<'d'> { static constexpr limb_type value = 13; }; |
| template <> struct hex_value<'e'> { static constexpr limb_type value = 14; }; |
| template <> struct hex_value<'f'> { static constexpr limb_type value = 15; }; |
| template <> struct hex_value<'A'> { static constexpr limb_type value = 10; }; |
| template <> struct hex_value<'B'> { static constexpr limb_type value = 11; }; |
| template <> struct hex_value<'C'> { static constexpr limb_type value = 12; }; |
| template <> struct hex_value<'D'> { static constexpr limb_type value = 13; }; |
| template <> struct hex_value<'E'> { static constexpr limb_type value = 14; }; |
| template <> struct hex_value<'F'> { static constexpr limb_type value = 15; }; |
| |
| template <class Pack, limb_type value> |
| struct combine_value_to_pack; |
| template <limb_type first, limb_type...ARGS, limb_type value> |
| struct combine_value_to_pack<value_pack<first, ARGS...>, value> |
| { |
| typedef value_pack<first | value, ARGS...> type; |
| }; |
| |
| template <char NextChar, char...CHARS> |
| struct pack_values |
| { |
| static constexpr unsigned chars_per_limb = sizeof(limb_type) * CHAR_BIT / 4; |
| static constexpr unsigned shift = ((sizeof...(CHARS)) % chars_per_limb) * 4; |
| static constexpr limb_type value_to_add = shift ? hex_value<NextChar>::value << shift : hex_value<NextChar>::value; |
| |
| typedef typename pack_values<CHARS...>::type recursive_packed_type; |
| typedef typename boost::mpl::if_c<shift == 0, |
| typename recursive_packed_type::next_type, |
| recursive_packed_type>::type pack_type; |
| typedef typename combine_value_to_pack<pack_type, value_to_add>::type type; |
| }; |
| template <char NextChar> |
| struct pack_values<NextChar> |
| { |
| static constexpr limb_type value_to_add = hex_value<NextChar>::value; |
| |
| typedef value_pack<value_to_add> type; |
| }; |
| |
| template <class T> |
| struct strip_leading_zeros_from_pack; |
| template <limb_type...PACK> |
| struct strip_leading_zeros_from_pack<value_pack<PACK...> > |
| { |
| typedef value_pack<PACK...> type; |
| }; |
| template <limb_type...PACK> |
| struct strip_leading_zeros_from_pack<value_pack<0u, PACK...> > |
| { |
| typedef typename strip_leading_zeros_from_pack<value_pack<PACK...> >::type type; |
| }; |
| |
| template <limb_type v, class PACK> |
| struct append_value_to_pack; |
| template <limb_type v, limb_type...PACK> |
| struct append_value_to_pack<v, value_pack<PACK...> > |
| { |
| typedef value_pack<PACK..., v> type; |
| }; |
| |
| template <class T> |
| struct reverse_value_pack; |
| template <limb_type v, limb_type...VALUES> |
| struct reverse_value_pack<value_pack<v, VALUES...> > |
| { |
| typedef typename reverse_value_pack<value_pack<VALUES...> >::type lead_values; |
| typedef typename append_value_to_pack<v, lead_values>::type type; |
| }; |
| template <limb_type v> |
| struct reverse_value_pack<value_pack<v> > |
| { |
| typedef value_pack<v> type; |
| }; |
| template <> |
| struct reverse_value_pack<value_pack<> > |
| { |
| typedef value_pack<> type; |
| }; |
| |
| template <char l1, char l2, char...STR> |
| struct make_packed_value_from_str |
| { |
| BOOST_STATIC_ASSERT_MSG(l1 == '0', "Multi-precision integer literals must be in hexadecimal notation."); |
| BOOST_STATIC_ASSERT_MSG((l2 == 'X') || (l2 == 'x'), "Multi-precision integer literals must be in hexadecimal notation."); |
| typedef typename pack_values<STR...>::type packed_type; |
| typedef typename strip_leading_zeros_from_pack<packed_type>::type stripped_type; |
| typedef typename reverse_value_pack<stripped_type>::type type; |
| }; |
| |
| template <class Pack, class B> |
| struct make_backend_from_pack |
| { |
| static constexpr Pack p = {}; |
| static constexpr B value = p; |
| }; |
| |
| template <class Pack, class B> |
| constexpr B make_backend_from_pack<Pack, B>::value; |
| |
| template <unsigned Digits> |
| struct signed_cpp_int_literal_result_type |
| { |
| static constexpr unsigned bits = Digits * 4; |
| typedef boost::multiprecision::backends::cpp_int_backend<bits, bits, signed_magnitude, unchecked, void> backend_type; |
| typedef number<backend_type, et_off> number_type; |
| }; |
| |
| template <unsigned Digits> |
| struct unsigned_cpp_int_literal_result_type |
| { |
| static constexpr unsigned bits = Digits * 4; |
| typedef boost::multiprecision::backends::cpp_int_backend<bits, bits, unsigned_magnitude, unchecked, void> backend_type; |
| typedef number<backend_type, et_off> number_type; |
| }; |
| |
| } |
| |
| template <char... STR> |
| constexpr typename boost::multiprecision::literals::detail::signed_cpp_int_literal_result_type<(sizeof...(STR)) - 2>::number_type operator "" _cppi() |
| { |
| typedef typename boost::multiprecision::literals::detail::make_packed_value_from_str<STR...>::type pt; |
| return boost::multiprecision::literals::detail::make_backend_from_pack<pt, typename boost::multiprecision::literals::detail::signed_cpp_int_literal_result_type<(sizeof...(STR)) - 2>::backend_type>::value; |
| } |
| |
| template <char... STR> |
| constexpr typename boost::multiprecision::literals::detail::unsigned_cpp_int_literal_result_type<(sizeof...(STR)) - 2>::number_type operator "" _cppui() |
| { |
| typedef typename boost::multiprecision::literals::detail::make_packed_value_from_str<STR...>::type pt; |
| return boost::multiprecision::literals::detail::make_backend_from_pack<pt, typename boost::multiprecision::literals::detail::unsigned_cpp_int_literal_result_type<(sizeof...(STR)) - 2>::backend_type>::value; |
| } |
| |
| #define BOOST_MP_DEFINE_SIZED_CPP_INT_LITERAL(Bits)\ |
| template <char... STR> \ |
| constexpr boost::multiprecision::number<boost::multiprecision::backends::cpp_int_backend<Bits, Bits, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, void> > operator "" BOOST_JOIN(_cppi, Bits)()\ |
| {\ |
| typedef typename boost::multiprecision::literals::detail::make_packed_value_from_str<STR...>::type pt;\ |
| return boost::multiprecision::literals::detail::make_backend_from_pack<\ |
| pt, \ |
| boost::multiprecision::backends::cpp_int_backend<Bits, Bits, boost::multiprecision::signed_magnitude, boost::multiprecision::unchecked, void> \ |
| >::value;\ |
| }\ |
| template <char... STR> \ |
| constexpr boost::multiprecision::number<boost::multiprecision::backends::cpp_int_backend<Bits, Bits, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void> > operator "" BOOST_JOIN(_cppui, Bits)()\ |
| {\ |
| typedef typename boost::multiprecision::literals::detail::make_packed_value_from_str<STR...>::type pt;\ |
| return boost::multiprecision::literals::detail::make_backend_from_pack<\ |
| pt, \ |
| boost::multiprecision::backends::cpp_int_backend<Bits, Bits, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>\ |
| >::value;\ |
| }\ |
| |
| BOOST_MP_DEFINE_SIZED_CPP_INT_LITERAL(128) |
| BOOST_MP_DEFINE_SIZED_CPP_INT_LITERAL(256) |
| BOOST_MP_DEFINE_SIZED_CPP_INT_LITERAL(512) |
| BOOST_MP_DEFINE_SIZED_CPP_INT_LITERAL(1024) |
| |
| } |
| |
| // |
| // Overload unary minus operator for constexpr use: |
| // |
| template <unsigned MinBits, cpp_int_check_type Checked> |
| constexpr number<cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>, et_off> |
| operator - (const number<cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>, et_off>& a) |
| { |
| return cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>(a.backend(), boost::multiprecision::literals::detail::make_negate_tag()); |
| } |
| template <unsigned MinBits, cpp_int_check_type Checked> |
| constexpr number<cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>, et_off> |
| operator - (number<cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>, et_off>&& a) |
| { |
| return cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>(static_cast<const number<cpp_int_backend<MinBits, MinBits, signed_magnitude, Checked, void>, et_off>&>(a).backend(), boost::multiprecision::literals::detail::make_negate_tag()); |
| } |
| |
| }} // namespaces |
| |
| #endif // BOOST_MP_CPP_INT_CORE_HPP |
| |