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) {
newlineboost::iostreams::char_traits51     static char newline() { return '\n'; }
goodboost::iostreams::char_traits52     static int good() { return '\n'; }
would_blockboost::iostreams::char_traits53     static int would_block() { return WOULD_BLOCK; }
is_goodboost::iostreams::char_traits54     static bool is_good(int c) { return c != EOF && c != WOULD_BLOCK; }
is_eofboost::iostreams::char_traits55     static bool is_eof(int c) { return c == EOF; }
would_blockboost::iostreams::char_traits56     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> {
newlineboost::iostreams::char_traits62     static wchar_t newline() { return L'\n'; }
goodboost::iostreams::char_traits63     static std::wint_t good() { return L'\n'; }
would_blockboost::iostreams::char_traits64     static std::wint_t would_block() { return WWOULD_BLOCK; }
is_goodboost::iostreams::char_traits65     static bool is_good(std::wint_t c) { return c != WEOF && c != WWOULD_BLOCK; }
is_eofboost::iostreams::char_traits66     static bool is_eof(std::wint_t c) { return c == WEOF; }
would_blockboost::iostreams::char_traits67     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