// (C) Copyright Jonathan Turkanis 2003.

 // 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_CHAR_TRAITS_HPP_INCLUDED

 #define BOOST_IOSTREAMS_CHAR_TRAITS_HPP_INCLUDED

 #if defined(_MSC_VER) && (_MSC_VER >= 1020)

 # pragma once

 #endif 

 #include <boost/config.hpp>

 #include <cstddef>

 #include <cstdio>  // EOF.

 #include <string>  // std::char_traits.

 #include <boost/iostreams/detail/char_traits.hpp>

 #include <boost/iostreams/detail/config/wide_streams.hpp>

 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS

 # include <cwchar>

 #endif

 #ifdef BOOST_NO_STDC_NAMESPACE

 namespace std { using ::wint_t; }

 #endif

 namespace boost { namespace iostreams {

 // Dinkumware that comes with QNX Momentics 6.3.0, 4.0.2, incorrectly defines the

 // EOF and WEOF macros to not std:: qualify the wint_t type (and so does

 // Sun C++ 5.8 + STLport 4). Fix by placing the def in this scope.

 // NOTE: Use BOOST_WORKAROUND?

 #if (defined(__QNX__) && defined(BOOST_DINKUMWARE_STDLIB))  \

     || defined(__SUNPRO_CC)

 using ::std::wint_t;

 #endif

 const int WOULD_BLOCK = (int) (EOF - 1);

 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS

 const std::wint_t WWOULD_BLOCK = (std::wint_t) (WEOF - 1);

 #endif

 template<typename Ch>

 struct char_traits;

 template<>

 struct char_traits<char> : BOOST_IOSTREAMS_CHAR_TRAITS(char) {

     static char newline() { return '\n'; }

     static int good() { return '\n'; }

     static int would_block() { return WOULD_BLOCK; }

     static bool is_good(int c) { return c != EOF && c != WOULD_BLOCK; }

     static bool is_eof(int c) { return c == EOF; }

     static bool would_block(int c) { return c == WOULD_BLOCK; }

 };

 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS

 template<>

 struct char_traits<wchar_t> : std::char_traits<wchar_t> {

     static wchar_t newline() { return L'\n'; }

     static std::wint_t good() { return L'\n'; }

     static std::wint_t would_block() { return WWOULD_BLOCK; }

     static bool is_good(std::wint_t c) { return c != WEOF && c != WWOULD_BLOCK; }

     static bool is_eof(std::wint_t c) { return c == WEOF; }

     static bool would_block(std::wint_t c) { return c == WWOULD_BLOCK; }

 };

 #endif

 } } // End namespaces iostreams, boost.

 #endif // #ifndef BOOST_IOSTREAMS_CHAR_TRAITS_HPP_INCLUDED