ceph/src/boost/libs/iostreams/include/boost/iostreams/char_traits.hpp

   1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
   2 // (C) Copyright 2003-2007 Jonathan Turkanis
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
   5
   6 // See http://www.boost.org/libs/iostreams for documentation.
   7
   8 #ifndef BOOST_IOSTREAMS_CHAR_TRAITS_HPP_INCLUDED
   9 #define BOOST_IOSTREAMS_CHAR_TRAITS_HPP_INCLUDED
  10
  11 #if defined(_MSC_VER)
  12 # pragma once
  13 #endif
  14
  15 #include <boost/config.hpp>
  16 #include <cstddef>
  17 #include <cstdio>  // EOF.
  18 #include <string>  // std::char_traits.
  19 #include <boost/iostreams/detail/char_traits.hpp>
  20 #include <boost/iostreams/detail/config/wide_streams.hpp>
  21 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
  22 # include <cwchar>
  23 #endif
  24
  25 #ifdef BOOST_NO_STDC_NAMESPACE
  26 namespace std { using ::wint_t; }
  27 #endif
  28
  29 namespace boost { namespace iostreams {
  30
  31 // Dinkumware that comes with QNX Momentics 6.3.0, 4.0.2, incorrectly defines
  32 // the EOF and WEOF macros to not std:: qualify the wint_t type (and so does
  33 // Sun C++ 5.8 + STLport 4). Fix by placing the def in this scope.
  34 // NOTE: Use BOOST_WORKAROUND?
  35 #if (defined(__QNX__) && defined(BOOST_DINKUMWARE_STDLIB))  \
  36     || defined(__SUNPRO_CC)
  37 using ::std::wint_t;
  38 #endif
  39
  40 const int WOULD_BLOCK = (int) (EOF - 1);
  41
  42 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
  43 const std::wint_t WWOULD_BLOCK = (std::wint_t) (WEOF - 1);
  44 #endif
  45
  46 template<typename Ch>
  47 struct char_traits;
  48
  49 template<>
  50 struct char_traits<char> : BOOST_IOSTREAMS_CHAR_TRAITS(char) {
  51     static char newline() { return '\n'; }
  52     static int good() { return '\n'; }
  53     static int would_block() { return WOULD_BLOCK; }
  54     static bool is_good(int c) { return c != EOF && c != WOULD_BLOCK; }
  55     static bool is_eof(int c) { return c == EOF; }
  56     static bool would_block(int c) { return c == WOULD_BLOCK; }
  57 };
  58
  59 #ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
  60 template<>
  61 struct char_traits<wchar_t> : std::char_traits<wchar_t> {
  62     static wchar_t newline() { return L'\n'; }
  63     static std::wint_t good() { return L'\n'; }
  64     static std::wint_t would_block() { return WWOULD_BLOCK; }
  65     static bool is_good(std::wint_t c) { return c != WEOF && c != WWOULD_BLOCK; }
  66     static bool is_eof(std::wint_t c) { return c == WEOF; }
  67     static bool would_block(std::wint_t c) { return c == WWOULD_BLOCK; }
  68 };
  69 #endif
  70
  71 } } // End namespaces iostreams, boost.
  72
  73 #endif // #ifndef BOOST_IOSTREAMS_CHAR_TRAITS_HPP_INCLUDED