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/usr/include/boost/spirit/home/x3/binary/binary.hpp
(6675B)
/*============================================================================= Copyright (c) 2001-2011 Hartmut Kaiser Copyright (c) 2001-2011 Joel de Guzman 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) ==============================================================================*/ #if !defined(BOOST_SPIRIT_X3_BINARY_MAY_08_2007_0808AM) #define BOOST_SPIRIT_X3_BINARY_MAY_08_2007_0808AM #include <boost/spirit/home/x3/core/parser.hpp> #include <boost/spirit/home/x3/core/skip_over.hpp> #include <boost/spirit/home/x3/support/traits/move_to.hpp> #include <cstdint> #include <boost/endian/conversion.hpp> #include <boost/endian/arithmetic.hpp> #include <boost/mpl/or.hpp> #include <boost/type_traits/is_integral.hpp> #include <boost/type_traits/is_enum.hpp> #include <boost/type_traits/is_floating_point.hpp> #include <boost/config.hpp> #include <climits> namespace boost { namespace spirit { namespace x3 { template <typename V, typename T , boost::endian::order endian, std::size_t bits> struct binary_lit_parser : parser<binary_lit_parser<V, T, endian, bits> > { static bool const has_attribute = false; typedef unused_type attribute_type; constexpr binary_lit_parser(V n_) : n(n_) {} template <typename Iterator, typename Context, typename Attribute> bool parse(Iterator& first, Iterator const& last , Context const& context, unused_type, Attribute& attr_param) const { x3::skip_over(first, last, context); unsigned char const* bytes = n.data(); Iterator it = first; for (unsigned int i = 0; i < sizeof(n); ++i) { if (it == last || *bytes++ != static_cast<unsigned char>(*it++)) return false; } first = it; x3::traits::move_to(n, attr_param); return true; } boost::endian::endian_arithmetic<endian, T, bits> n; }; /////////////////////////////////////////////////////////////////////////// template <typename T, boost::endian::order endian, std::size_t bits> struct any_binary_parser : parser<any_binary_parser<T, endian, bits > > { typedef T attribute_type; static bool const has_attribute = !is_same<unused_type, attribute_type>::value; template <typename Iterator, typename Context, typename Attribute> bool parse(Iterator& first, Iterator const& last , Context const& context, unused_type, Attribute& attr_param) const { x3::skip_over(first, last, context); // Properly align the buffer for performance reasons alignas(T) unsigned char buf[sizeof(T)]; unsigned char * bytes = buf; Iterator it = first; for (unsigned int i = 0; i < sizeof(T); ++i) { if (it == last) return false; *bytes++ = *it++; } first = it; static_assert(bits % CHAR_BIT == 0, "Boost.Endian supports only multiples of CHAR_BIT"); x3::traits::move_to( endian::endian_load<T, bits / CHAR_BIT, endian>(buf), attr_param); return true; } template <typename V> constexpr binary_lit_parser< V, T, endian, bits> operator()(V n) const { return {n}; } }; #define BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(name, endiantype, attrtype, bits) \ typedef any_binary_parser< attrtype, boost::endian::order::endiantype, bits > name##type; \ constexpr name##type name = name##type(); BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(byte_, native, uint_least8_t, 8) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(word, native, uint_least16_t, 16) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(big_word, big, uint_least16_t, 16) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(little_word, little, uint_least16_t, 16) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(dword, native, uint_least32_t, 32) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(big_dword, big, uint_least32_t, 32) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(little_dword, little, uint_least32_t, 32) #ifdef BOOST_HAS_LONG_LONG BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(qword, native, uint_least64_t, 64) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(big_qword, big, uint_least64_t, 64) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(little_qword, little, uint_least64_t, 64) #endif BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(bin_float, native, float, sizeof(float) * CHAR_BIT) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(big_bin_float, big, float, sizeof(float) * CHAR_BIT) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(little_bin_float, little, float, sizeof(float) * CHAR_BIT) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(bin_double, native, double, sizeof(double) * CHAR_BIT) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(big_bin_double, big, double, sizeof(double) * CHAR_BIT) BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE(little_bin_double, little, double, sizeof(double) * CHAR_BIT) #undef BOOST_SPIRIT_MAKE_BINARY_PRIMITIVE /////////////////////////////////////////////////////////////////////////// template <typename T, std::size_t bits> struct get_info<any_binary_parser<T, endian::order::little, bits>> { typedef std::string result_type; std::string operator()(any_binary_parser<T, endian::order::little, bits> const&) const { return "little-endian binary"; } }; template <typename T, std::size_t bits> struct get_info<any_binary_parser<T, endian::order::big, bits>> { typedef std::string result_type; std::string operator()(any_binary_parser<T, endian::order::big, bits> const&) const { return "big-endian binary"; } }; template <typename V, typename T, std::size_t bits> struct get_info<binary_lit_parser<V, T, endian::order::little, bits>> { typedef std::string result_type; std::string operator()(binary_lit_parser<V, T, endian::order::little, bits> const&) const { return "little-endian binary"; } }; template <typename V, typename T, std::size_t bits> struct get_info<binary_lit_parser<V, T, endian::order::big, bits>> { typedef std::string result_type; std::string operator()(binary_lit_parser<V, T, endian::order::big, bits> const&) const { return "big-endian binary"; } }; }}} #endif
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