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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2004-2007 Jonathan Turkanis
// 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.)
// See http://www.boost.org/libs/iostreams for documentation.
#ifndef BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED
#define BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/config.hpp> // BOOST_MSVC, make sure size_t is in std.
#include <boost/detail/workaround.hpp>
#include <cstddef> // std::size_t.
#include <utility> // pair.
#include <boost/iostreams/categories.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/is_same.hpp>
namespace boost { namespace iostreams {
namespace detail {
template<typename Mode, typename Ch>
class array_adapter {
public:
typedef Ch char_type;
typedef std::pair<char_type*, char_type*> pair_type;
struct category
: public Mode,
public device_tag,
public direct_tag
{ };
array_adapter(char_type* begin, char_type* end);
array_adapter(char_type* begin, std::size_t length);
array_adapter(const char_type* begin, const char_type* end);
array_adapter(const char_type* begin, std::size_t length);
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
template<int N>
array_adapter(char_type (&ar)[N])
: begin_(ar), end_(ar + N)
{ }
#endif
pair_type input_sequence();
pair_type output_sequence();
private:
char_type* begin_;
char_type* end_;
};
} // End namespace detail.
// Local macros, #undef'd below.
#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
# define BOOST_IOSTREAMS_ARRAY_CTOR(name, ch) \
template<int N> \
BOOST_PP_CAT(basic_, name)(ch (&ar)[N]) \
: base_type(ar) { } \
/**/
#else
# define BOOST_IOSTREAMS_ARRAY_CTOR(name, ch)
#endif
#define BOOST_IOSTREAMS_ARRAY(name, mode) \
template<typename Ch> \
struct BOOST_PP_CAT(basic_, name) : detail::array_adapter<mode, Ch> { \
private: \
typedef detail::array_adapter<mode, Ch> base_type; \
public: \
typedef typename base_type::char_type char_type; \
typedef typename base_type::category category; \
BOOST_PP_CAT(basic_, name)(char_type* begin, char_type* end) \
: base_type(begin, end) { } \
BOOST_PP_CAT(basic_, name)(char_type* begin, std::size_t length) \
: base_type(begin, length) { } \
BOOST_PP_CAT(basic_, name)(const char_type* begin, const char_type* end) \
: base_type(begin, end) { } \
BOOST_PP_CAT(basic_, name)(const char_type* begin, std::size_t length) \
: base_type(begin, length) { } \
BOOST_IOSTREAMS_ARRAY_CTOR(name, Ch) \
}; \
typedef BOOST_PP_CAT(basic_, name)<char> name; \
typedef BOOST_PP_CAT(basic_, name)<wchar_t> BOOST_PP_CAT(w, name); \
/**/
BOOST_IOSTREAMS_ARRAY(array_source, input_seekable)
BOOST_IOSTREAMS_ARRAY(array_sink, output_seekable)
BOOST_IOSTREAMS_ARRAY(array, seekable)
#undef BOOST_IOSTREAMS_ARRAY_CTOR
#undef BOOST_IOSTREAMS_ARRAY
//------------------Implementation of array_adapter---------------------------//
namespace detail {
template<typename Mode, typename Ch>
array_adapter<Mode, Ch>::array_adapter
(char_type* begin, char_type* end)
: begin_(begin), end_(end)
{ }
template<typename Mode, typename Ch>
array_adapter<Mode, Ch>::array_adapter
(char_type* begin, std::size_t length)
: begin_(begin), end_(begin + length)
{ }
template<typename Mode, typename Ch>
array_adapter<Mode, Ch>::array_adapter
(const char_type* begin, const char_type* end)
: begin_(const_cast<char_type*>(begin)), // Treated as read-only.
end_(const_cast<char_type*>(end)) // Treated as read-only.
{ BOOST_STATIC_ASSERT((!is_convertible<Mode, output>::value)); }
template<typename Mode, typename Ch>
array_adapter<Mode, Ch>::array_adapter
(const char_type* begin, std::size_t length)
: begin_(const_cast<char_type*>(begin)), // Treated as read-only.
end_(const_cast<char_type*>(begin) + length) // Treated as read-only.
{ BOOST_STATIC_ASSERT((!is_convertible<Mode, output>::value)); }
template<typename Mode, typename Ch>
typename array_adapter<Mode, Ch>::pair_type
array_adapter<Mode, Ch>::input_sequence()
{ BOOST_STATIC_ASSERT((is_convertible<Mode, input>::value));
return pair_type(begin_, end_); }
template<typename Mode, typename Ch>
typename array_adapter<Mode, Ch>::pair_type
array_adapter<Mode, Ch>::output_sequence()
{ BOOST_STATIC_ASSERT((is_convertible<Mode, output>::value));
return pair_type(begin_, end_); }
} // End namespace detail.
//----------------------------------------------------------------------------//
} } // End namespaces iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED
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