1 // Iostreams base classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 // 2006, 2007, 2008, 2009
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 _GLIBCXX_BEGIN_NAMESPACE(std)
36 // Definitions for static const members of ios_base.
37 const ios_base::fmtflags ios_base::boolalpha;
38 const ios_base::fmtflags ios_base::dec;
39 const ios_base::fmtflags ios_base::fixed;
40 const ios_base::fmtflags ios_base::hex;
41 const ios_base::fmtflags ios_base::internal;
42 const ios_base::fmtflags ios_base::left;
43 const ios_base::fmtflags ios_base::oct;
44 const ios_base::fmtflags ios_base::right;
45 const ios_base::fmtflags ios_base::scientific;
46 const ios_base::fmtflags ios_base::showbase;
47 const ios_base::fmtflags ios_base::showpoint;
48 const ios_base::fmtflags ios_base::showpos;
49 const ios_base::fmtflags ios_base::skipws;
50 const ios_base::fmtflags ios_base::unitbuf;
51 const ios_base::fmtflags ios_base::uppercase;
52 const ios_base::fmtflags ios_base::adjustfield;
53 const ios_base::fmtflags ios_base::basefield;
54 const ios_base::fmtflags ios_base::floatfield;
56 const ios_base::iostate ios_base::badbit;
57 const ios_base::iostate ios_base::eofbit;
58 const ios_base::iostate ios_base::failbit;
59 const ios_base::iostate ios_base::goodbit;
61 const ios_base::openmode ios_base::app;
62 const ios_base::openmode ios_base::ate;
63 const ios_base::openmode ios_base::binary;
64 const ios_base::openmode ios_base::in;
65 const ios_base::openmode ios_base::out;
66 const ios_base::openmode ios_base::trunc;
68 const ios_base::seekdir ios_base::beg;
69 const ios_base::seekdir ios_base::cur;
70 const ios_base::seekdir ios_base::end;
72 _Atomic_word ios_base::Init::_S_refcount;
74 bool ios_base::Init::_S_synced_with_stdio = true;
77 : _M_precision(), _M_width(), _M_flags(), _M_exception(),
78 _M_streambuf_state(), _M_callbacks(0), _M_word_zero(),
79 _M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale()
81 // Do nothing: basic_ios::init() does it.
82 // NB: _M_callbacks and _M_word must be zero for non-initialized
83 // ios_base to go through ~ios_base gracefully.
86 // 27.4.2.7 ios_base constructors/destructors
89 _M_call_callbacks(erase_event);
90 _M_dispose_callbacks();
91 if (_M_word != _M_local_word)
98 // 27.4.2.5 ios_base storage functions
100 ios_base::xalloc() throw()
102 // Implementation note: Initialize top to zero to ensure that
103 // initialization occurs before main() is started.
104 static _Atomic_word _S_top = 0;
105 return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4;
109 ios_base::register_callback(event_callback __fn, int __index)
110 { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); }
112 // 27.4.2.5 iword/pword storage
114 ios_base::_M_grow_words(int __ix, bool __iword)
116 // Precondition: _M_word_size <= __ix
117 int __newsize = _S_local_word_size;
118 _Words* __words = _M_local_word;
119 if (__ix > _S_local_word_size - 1)
121 if (__ix < numeric_limits<int>::max())
123 __newsize = __ix + 1;
125 { __words = new _Words[__newsize]; }
128 _M_streambuf_state |= badbit;
129 if (_M_streambuf_state & _M_exception)
130 __throw_ios_failure(__N("ios_base::_M_grow_words "
131 "allocation failed"));
133 _M_word_zero._M_iword = 0;
135 _M_word_zero._M_pword = 0;
138 for (int __i = 0; __i < _M_word_size; __i++)
139 __words[__i] = _M_word[__i];
140 if (_M_word && _M_word != _M_local_word)
148 _M_streambuf_state |= badbit;
149 if (_M_streambuf_state & _M_exception)
150 __throw_ios_failure(__N("ios_base::_M_grow_words is not valid"));
152 _M_word_zero._M_iword = 0;
154 _M_word_zero._M_pword = 0;
159 _M_word_size = __newsize;
160 return _M_word[__ix];
164 ios_base::_M_call_callbacks(event __e) throw()
166 _Callback_list* __p = _M_callbacks;
170 { (*__p->_M_fn) (__e, *this, __p->_M_index); }
178 ios_base::_M_dispose_callbacks(void)
180 _Callback_list* __p = _M_callbacks;
181 while (__p && __p->_M_remove_reference() == 0)
183 _Callback_list* __next = __p->_M_next;
190 _GLIBCXX_END_NAMESPACE