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) && (_MSC_VER >= 1020)
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
26namespace std { using ::wint_t; }
27#endif
28
29namespace 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)
37using ::std::wint_t;
38#endif
39
40const int WOULD_BLOCK = (int) (EOF - 1);
41
42#ifndef BOOST_IOSTREAMS_NO_WIDE_STREAMS
43const std::wint_t WWOULD_BLOCK = (std::wint_t) (WEOF - 1);
44#endif
45
46template<typename Ch>
47struct char_traits;
48
49template<>
50struct 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
60template<>
61struct 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
74

source code of boost/boost/iostreams/char_traits.hpp