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/*=============================================================================
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 T, boost::endian::order endian, std::size_t bits>
struct binary_lit_parser
: parser<binary_lit_parser<T, endian, bits> >
{
static bool const has_attribute = false;
typedef unused_type attribute_type;
constexpr binary_lit_parser(T 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;
}
constexpr binary_lit_parser<T, endian, bits> operator()(T 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 T, std::size_t bits>
struct get_info<binary_lit_parser<T, endian::order::little, bits>>
{
typedef std::string result_type;
std::string operator()(binary_lit_parser<T, endian::order::little, bits> const&) const
{
return "little-endian binary";
}
};
template <typename T, std::size_t bits>
struct get_info<binary_lit_parser<T, endian::order::big, bits>>
{
typedef std::string result_type;
std::string operator()(binary_lit_parser<T, endian::order::big, bits> const&) const
{
return "big-endian binary";
}
};
}}}
#endif
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