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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
// Iostreams base classes -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
// 2006, 2007, 2008, 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
//
// ISO C++ 14882: 27.4 Iostreams base classes
//
#include <ios>
#include <limits>
_GLIBCXX_BEGIN_NAMESPACE(std)
// Definitions for static const members of ios_base.
const ios_base::fmtflags ios_base::boolalpha;
const ios_base::fmtflags ios_base::dec;
const ios_base::fmtflags ios_base::fixed;
const ios_base::fmtflags ios_base::hex;
const ios_base::fmtflags ios_base::internal;
const ios_base::fmtflags ios_base::left;
const ios_base::fmtflags ios_base::oct;
const ios_base::fmtflags ios_base::right;
const ios_base::fmtflags ios_base::scientific;
const ios_base::fmtflags ios_base::showbase;
const ios_base::fmtflags ios_base::showpoint;
const ios_base::fmtflags ios_base::showpos;
const ios_base::fmtflags ios_base::skipws;
const ios_base::fmtflags ios_base::unitbuf;
const ios_base::fmtflags ios_base::uppercase;
const ios_base::fmtflags ios_base::adjustfield;
const ios_base::fmtflags ios_base::basefield;
const ios_base::fmtflags ios_base::floatfield;
const ios_base::iostate ios_base::badbit;
const ios_base::iostate ios_base::eofbit;
const ios_base::iostate ios_base::failbit;
const ios_base::iostate ios_base::goodbit;
const ios_base::openmode ios_base::app;
const ios_base::openmode ios_base::ate;
const ios_base::openmode ios_base::binary;
const ios_base::openmode ios_base::in;
const ios_base::openmode ios_base::out;
const ios_base::openmode ios_base::trunc;
const ios_base::seekdir ios_base::beg;
const ios_base::seekdir ios_base::cur;
const ios_base::seekdir ios_base::end;
_Atomic_word ios_base::Init::_S_refcount;
bool ios_base::Init::_S_synced_with_stdio = true;
ios_base::ios_base() throw()
: _M_precision(), _M_width(), _M_flags(), _M_exception(),
_M_streambuf_state(), _M_callbacks(0), _M_word_zero(),
_M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale()
{
// Do nothing: basic_ios::init() does it.
// NB: _M_callbacks and _M_word must be zero for non-initialized
// ios_base to go through ~ios_base gracefully.
}
// 27.4.2.7 ios_base constructors/destructors
ios_base::~ios_base()
{
_M_call_callbacks(erase_event);
_M_dispose_callbacks();
if (_M_word != _M_local_word)
{
delete [] _M_word;
_M_word = 0;
}
}
// 27.4.2.5 ios_base storage functions
int
ios_base::xalloc() throw()
{
// Implementation note: Initialize top to zero to ensure that
// initialization occurs before main() is started.
static _Atomic_word _S_top = 0;
return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4;
}
void
ios_base::register_callback(event_callback __fn, int __index)
{ _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); }
// 27.4.2.5 iword/pword storage
ios_base::_Words&
ios_base::_M_grow_words(int __ix, bool __iword)
{
// Precondition: _M_word_size <= __ix
int __newsize = _S_local_word_size;
_Words* __words = _M_local_word;
if (__ix > _S_local_word_size - 1)
{
if (__ix < numeric_limits<int>::max())
{
__newsize = __ix + 1;
__try
{ __words = new _Words[__newsize]; }
__catch(const std::bad_alloc&)
{
_M_streambuf_state |= badbit;
if (_M_streambuf_state & _M_exception)
__throw_ios_failure(__N("ios_base::_M_grow_words "
"allocation failed"));
if (__iword)
_M_word_zero._M_iword = 0;
else
_M_word_zero._M_pword = 0;
return _M_word_zero;
}
for (int __i = 0; __i < _M_word_size; __i++)
__words[__i] = _M_word[__i];
if (_M_word && _M_word != _M_local_word)
{
delete [] _M_word;
_M_word = 0;
}
}
else
{
_M_streambuf_state |= badbit;
if (_M_streambuf_state & _M_exception)
__throw_ios_failure(__N("ios_base::_M_grow_words is not valid"));
if (__iword)
_M_word_zero._M_iword = 0;
else
_M_word_zero._M_pword = 0;
return _M_word_zero;
}
}
_M_word = __words;
_M_word_size = __newsize;
return _M_word[__ix];
}
void
ios_base::_M_call_callbacks(event __e) throw()
{
_Callback_list* __p = _M_callbacks;
while (__p)
{
__try
{ (*__p->_M_fn) (__e, *this, __p->_M_index); }
__catch(...)
{ }
__p = __p->_M_next;
}
}
void
ios_base::_M_dispose_callbacks(void) throw()
{
_Callback_list* __p = _M_callbacks;
while (__p && __p->_M_remove_reference() == 0)
{
_Callback_list* __next = __p->_M_next;
delete __p;
__p = __next;
}
_M_callbacks = 0;
}
_GLIBCXX_END_NAMESPACE
|
