1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
// (C) Copyright Gennadiy Rozental 2002-2014.
// (C) Copyright Daryle Walker 2000-2001.
// 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/test for the library home page.
//
// File : $RCSfile$
//
// Version : $Revision$
//
// Description : simulate /dev/null stream
// ***************************************************************************
#ifndef BOOST_TEST_UTILS_NULLSTREAM_HPP
#define BOOST_TEST_UTILS_NULLSTREAM_HPP
// STL
#include <ostream> // for std::basic_ostream
#include <streambuf> // for std::basic_streambuf
#include <string> // for std::char_traits
// Boost
#include <boost/utility/base_from_member.hpp>
#include <boost/test/detail/suppress_warnings.hpp>
//____________________________________________________________________________//
namespace boost {
// ************************************************************************** //
// ************** basic_nullbuf ************** //
// ************************************************************************** //
// Class for a buffer that reads nothing and writes to nothing.
// Idea from an Usenet post by Tom <the_wid@my-deja.com> at
// 27 Oct 2000 14:06:21 GMT on comp.lang.c++.
template<typename CharType, class CharTraits = ::std::char_traits<CharType> >
class basic_nullbuf : public ::std::basic_streambuf<CharType, CharTraits> {
typedef ::std::basic_streambuf<CharType, CharTraits> base_type;
public:
// Types
typedef typename base_type::char_type char_type;
typedef typename base_type::traits_type traits_type;
typedef typename base_type::int_type int_type;
typedef typename base_type::pos_type pos_type;
typedef typename base_type::off_type off_type;
// Use automatic default constructor and destructor
protected:
// The default implementations of the miscellaneous virtual
// member functions are sufficient.
// The default implementations of the input & putback virtual
// member functions, being nowhere but EOF, are sufficient.
// The output virtual member functions need to be changed to
// accept anything without any problems, instead of being at EOF.
virtual ::std::streamsize xsputn( char_type const* /*s*/, ::std::streamsize n ) { return n; } // "s" is unused
virtual int_type overflow( int_type c = traits_type::eof() ) { return traits_type::not_eof( c ); }
};
typedef basic_nullbuf<char> nullbuf;
typedef basic_nullbuf<wchar_t> wnullbuf;
// ************************************************************************** //
// ************** basic_onullstream ************** //
// ************************************************************************** //
// Output streams based on basic_nullbuf.
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable: 4355) // 'this' : used in base member initializer list
#endif
template< typename CharType, class CharTraits = ::std::char_traits<CharType> >
class basic_onullstream : private boost::base_from_member<basic_nullbuf<CharType, CharTraits> >
, public ::std::basic_ostream<CharType, CharTraits> {
typedef boost::base_from_member<basic_nullbuf<CharType, CharTraits> > pbase_type;
typedef ::std::basic_ostream<CharType, CharTraits> base_type;
public:
// Constructor
basic_onullstream() : pbase_type(), base_type( &this->pbase_type::member ) {}
};
#ifdef BOOST_MSVC
# pragma warning(default: 4355)
# pragma warning(pop)
#endif
typedef basic_onullstream<char> onullstream;
typedef basic_onullstream<wchar_t> wonullstream;
} // namespace boost
//____________________________________________________________________________//
#include <boost/test/detail/enable_warnings.hpp>
#endif // BOOST_TEST_UTILS_NULLSTREAM_HPP
|
