1 // Iostreams base classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 // 2006, 2007, 2008, 2009, 2010
5 // Free Software Foundation, Inc.
7 // This file is part of the GNU ISO C++ Library. This library is free
8 // software; you can redistribute it and/or modify it under the
9 // terms of the GNU General Public License as published by the
10 // Free Software Foundation; either version 3, or (at your option)
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // Under Section 7 of GPL version 3, you are granted additional
19 // permissions described in the GCC Runtime Library Exception, version
20 // 3.1, as published by the Free Software Foundation.
22 // You should have received a copy of the GNU General Public License and
23 // a copy of the GCC Runtime Library Exception along with this program;
24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 // <http://www.gnu.org/licenses/>.
28 // ISO C++ 14882: 27.4 Iostreams base classes
34 namespace std
_GLIBCXX_VISIBILITY(default)
36 _GLIBCXX_BEGIN_NAMESPACE_VERSION
38 // Definitions for static const members of ios_base.
39 const ios_base::fmtflags
ios_base::boolalpha
;
40 const ios_base::fmtflags
ios_base::dec
;
41 const ios_base::fmtflags
ios_base::fixed
;
42 const ios_base::fmtflags
ios_base::hex
;
43 const ios_base::fmtflags
ios_base::internal
;
44 const ios_base::fmtflags
ios_base::left
;
45 const ios_base::fmtflags
ios_base::oct
;
46 const ios_base::fmtflags
ios_base::right
;
47 const ios_base::fmtflags
ios_base::scientific
;
48 const ios_base::fmtflags
ios_base::showbase
;
49 const ios_base::fmtflags
ios_base::showpoint
;
50 const ios_base::fmtflags
ios_base::showpos
;
51 const ios_base::fmtflags
ios_base::skipws
;
52 const ios_base::fmtflags
ios_base::unitbuf
;
53 const ios_base::fmtflags
ios_base::uppercase
;
54 const ios_base::fmtflags
ios_base::adjustfield
;
55 const ios_base::fmtflags
ios_base::basefield
;
56 const ios_base::fmtflags
ios_base::floatfield
;
58 const ios_base::iostate
ios_base::badbit
;
59 const ios_base::iostate
ios_base::eofbit
;
60 const ios_base::iostate
ios_base::failbit
;
61 const ios_base::iostate
ios_base::goodbit
;
63 const ios_base::openmode
ios_base::app
;
64 const ios_base::openmode
ios_base::ate
;
65 const ios_base::openmode
ios_base::binary
;
66 const ios_base::openmode
ios_base::in
;
67 const ios_base::openmode
ios_base::out
;
68 const ios_base::openmode
ios_base::trunc
;
70 const ios_base::seekdir
ios_base::beg
;
71 const ios_base::seekdir
ios_base::cur
;
72 const ios_base::seekdir
ios_base::end
;
74 _Atomic_word
ios_base::Init::_S_refcount
;
76 bool ios_base::Init::_S_synced_with_stdio
= true;
78 ios_base::ios_base() throw()
79 : _M_precision(), _M_width(), _M_flags(), _M_exception(),
80 _M_streambuf_state(), _M_callbacks(0), _M_word_zero(),
81 _M_word_size(_S_local_word_size
), _M_word(_M_local_word
), _M_ios_locale()
83 // Do nothing: basic_ios::init() does it.
84 // NB: _M_callbacks and _M_word must be zero for non-initialized
85 // ios_base to go through ~ios_base gracefully.
88 // 27.4.2.7 ios_base constructors/destructors
91 _M_call_callbacks(erase_event
);
92 _M_dispose_callbacks();
93 if (_M_word
!= _M_local_word
)
100 // 27.4.2.5 ios_base storage functions
102 ios_base::xalloc() throw()
104 // Implementation note: Initialize top to zero to ensure that
105 // initialization occurs before main() is started.
106 static _Atomic_word _S_top
= 0;
107 return __gnu_cxx::__exchange_and_add_dispatch(&_S_top
, 1) + 4;
111 ios_base::register_callback(event_callback __fn
, int __index
)
112 { _M_callbacks
= new _Callback_list(__fn
, __index
, _M_callbacks
); }
114 // 27.4.2.5 iword/pword storage
116 ios_base::_M_grow_words(int __ix
, bool __iword
)
118 // Precondition: _M_word_size <= __ix
119 int __newsize
= _S_local_word_size
;
120 _Words
* __words
= _M_local_word
;
121 if (__ix
> _S_local_word_size
- 1)
123 if (__ix
< numeric_limits
<int>::max())
125 __newsize
= __ix
+ 1;
127 { __words
= new _Words
[__newsize
]; }
128 __catch(const std::bad_alloc
&)
130 _M_streambuf_state
|= badbit
;
131 if (_M_streambuf_state
& _M_exception
)
132 __throw_ios_failure(__N("ios_base::_M_grow_words "
133 "allocation failed"));
135 _M_word_zero
._M_iword
= 0;
137 _M_word_zero
._M_pword
= 0;
140 for (int __i
= 0; __i
< _M_word_size
; __i
++)
141 __words
[__i
] = _M_word
[__i
];
142 if (_M_word
&& _M_word
!= _M_local_word
)
150 _M_streambuf_state
|= badbit
;
151 if (_M_streambuf_state
& _M_exception
)
152 __throw_ios_failure(__N("ios_base::_M_grow_words is not valid"));
154 _M_word_zero
._M_iword
= 0;
156 _M_word_zero
._M_pword
= 0;
161 _M_word_size
= __newsize
;
162 return _M_word
[__ix
];
166 ios_base::_M_call_callbacks(event __e
) throw()
168 _Callback_list
* __p
= _M_callbacks
;
172 { (*__p
->_M_fn
) (__e
, *this, __p
->_M_index
); }
180 ios_base::_M_dispose_callbacks(void) throw()
182 _Callback_list
* __p
= _M_callbacks
;
183 while (__p
&& __p
->_M_remove_reference() == 0)
185 _Callback_list
* __next
= __p
->_M_next
;
192 _GLIBCXX_END_NAMESPACE_VERSION