sl@0: // (C) Copyright Jonathan Turkanis 2004.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See accompanying
sl@0: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
sl@0: 
sl@0: // See http://www.boost.org/libs/iostreams for documentation.
sl@0: 
sl@0: #ifndef BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED
sl@0: 
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: #include <boost/config.hpp>         // BOOST_MSVC, make sure size_t is in std.
sl@0: #include <boost/detail/workaround.hpp>
sl@0: #include <cstddef>                  // std::size_t.
sl@0: #include <utility>                  // pair.
sl@0: #include <boost/iostreams/categories.hpp>
sl@0: #include <boost/preprocessor/cat.hpp>
sl@0: #include <boost/static_assert.hpp>
sl@0: #include <boost/type_traits/is_convertible.hpp>
sl@0: #include <boost/type_traits/is_same.hpp>
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: class array_adapter {
sl@0: public:
sl@0:     typedef Ch                                 char_type;
sl@0:     typedef std::pair<char_type*, char_type*>  pair_type;
sl@0:     struct category
sl@0:         : public Mode,
sl@0:           public device_tag,
sl@0:           public direct_tag
sl@0:         { };
sl@0:     array_adapter(char_type* begin, char_type* end);
sl@0:     array_adapter(char_type* begin, std::size_t length);
sl@0:     array_adapter(const char_type* begin, const char_type* end);
sl@0:     array_adapter(const char_type* begin, std::size_t length);
sl@0: #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
sl@0:     template<int N>
sl@0:     array_adapter(char_type (&ar)[N])
sl@0:         : begin_(ar), end_(ar + N) 
sl@0:         { }
sl@0: #endif
sl@0:     pair_type input_sequence();
sl@0:     pair_type output_sequence();
sl@0: private:
sl@0:     char_type* begin_;
sl@0:     char_type* end_;
sl@0: };
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: // Local macros, #undef'd below.
sl@0: #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
sl@0: # define BOOST_IOSTREAMS_ARRAY_CTOR(name, ch) \
sl@0:     template<int N> \
sl@0:     BOOST_PP_CAT(basic_, name)(ch (&ar)[N]) \
sl@0:         : base_type(ar) { } \
sl@0:     /**/
sl@0: #else
sl@0: # define BOOST_IOSTREAMS_ARRAY_CTOR(name, ch)
sl@0: #endif
sl@0: #define BOOST_IOSTREAMS_ARRAY(name, mode) \
sl@0:     template<typename Ch> \
sl@0:     struct BOOST_PP_CAT(basic_, name) : detail::array_adapter<mode, Ch> { \
sl@0:     private: \
sl@0:         typedef detail::array_adapter<mode, Ch>  base_type; \
sl@0:     public: \
sl@0:         typedef typename base_type::char_type    char_type; \
sl@0:         typedef typename base_type::category     category; \
sl@0:         BOOST_PP_CAT(basic_, name)(char_type* begin, char_type* end) \
sl@0:             : base_type(begin, end) { } \
sl@0:         BOOST_PP_CAT(basic_, name)(char_type* begin, std::size_t length) \
sl@0:             : base_type(begin, length) { } \
sl@0:         BOOST_PP_CAT(basic_, name)(const char_type* begin, const char_type* end) \
sl@0:             : base_type(begin, end) { } \
sl@0:         BOOST_PP_CAT(basic_, name)(const char_type* begin, std::size_t length) \
sl@0:             : base_type(begin, length) { } \
sl@0:         BOOST_IOSTREAMS_ARRAY_CTOR(name, Ch) \
sl@0:     }; \
sl@0:     typedef BOOST_PP_CAT(basic_, name)<char>     name; \
sl@0:     typedef BOOST_PP_CAT(basic_, name)<wchar_t>  BOOST_PP_CAT(w, name); \
sl@0:     /**/
sl@0: BOOST_IOSTREAMS_ARRAY(array_source, input_seekable)
sl@0: BOOST_IOSTREAMS_ARRAY(array_sink, output_seekable)
sl@0: BOOST_IOSTREAMS_ARRAY(array, seekable)
sl@0: #undef BOOST_IOSTREAMS_ARRAY_CTOR
sl@0: #undef BOOST_IOSTREAMS_ARRAY
sl@0: 
sl@0: 
sl@0: //------------------Implementation of array_adapter---------------------------//
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: array_adapter<Mode, Ch>::array_adapter
sl@0:     (char_type* begin, char_type* end) 
sl@0:     : begin_(begin), end_(end) 
sl@0:     { }
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: array_adapter<Mode, Ch>::array_adapter
sl@0:     (char_type* begin, std::size_t length) 
sl@0:     : begin_(begin), end_(begin + length) 
sl@0:     { }
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: array_adapter<Mode, Ch>::array_adapter
sl@0:     (const char_type* begin, const char_type* end) 
sl@0:     : begin_(const_cast<char_type*>(begin)),  // Treated as read-only.
sl@0:       end_(const_cast<char_type*>(end))       // Treated as read-only.
sl@0: { BOOST_STATIC_ASSERT((!is_convertible<Mode, output>::value)); }
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: array_adapter<Mode, Ch>::array_adapter
sl@0:     (const char_type* begin, std::size_t length) 
sl@0:     : begin_(const_cast<char_type*>(begin)),       // Treated as read-only.
sl@0:       end_(const_cast<char_type*>(begin) + length) // Treated as read-only.
sl@0: { BOOST_STATIC_ASSERT((!is_convertible<Mode, output>::value)); }
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: typename array_adapter<Mode, Ch>::pair_type
sl@0: array_adapter<Mode, Ch>::input_sequence()
sl@0: { BOOST_STATIC_ASSERT((is_convertible<Mode, input>::value));
sl@0:   return pair_type(begin_, end_); }
sl@0: 
sl@0: template<typename Mode, typename Ch>
sl@0: typename array_adapter<Mode, Ch>::pair_type
sl@0: array_adapter<Mode, Ch>::output_sequence()
sl@0: { BOOST_STATIC_ASSERT((is_convertible<Mode, output>::value));
sl@0:   return pair_type(begin_, end_); }
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: //----------------------------------------------------------------------------//
sl@0: 
sl@0: } } // End namespaces iostreams, boost.
sl@0: 
sl@0: #endif // #ifndef BOOST_IOSTREAMS_ARRAY_HPP_INCLUDED