]>
Commit | Line | Data |
---|---|---|
b2dad0e3 BK |
1 | // Iostreams base classes -*- C++ -*- |
2 | ||
bc2631e0 PC |
3 | // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
4 | // 2006, 2007, 2008, 2009 | |
17325050 | 5 | // Free Software Foundation, Inc. |
b2dad0e3 BK |
6 | // |
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 2, or (at your option) | |
11 | // any later version. | |
12 | ||
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. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License along | |
19 | // with this library; see the file COPYING. If not, write to the Free | |
83f51799 | 20 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
b2dad0e3 BK |
21 | // USA. |
22 | ||
23 | // As a special exception, you may use this file as part of a free software | |
24 | // library without restriction. Specifically, if other files instantiate | |
25 | // templates or use macros or inline functions from this file, or you compile | |
26 | // this file and link it with other files to produce an executable, this | |
27 | // file does not by itself cause the resulting executable to be covered by | |
28 | // the GNU General Public License. This exception does not however | |
29 | // invalidate any other reasons why the executable file might be covered by | |
30 | // the GNU General Public License. | |
31 | ||
32 | // | |
33 | // ISO C++ 14882: 27.4 Iostreams base classes | |
34 | // | |
35 | ||
54c1bf78 | 36 | #include <ios> |
c755e77d | 37 | #include <limits> |
a7817e1d | 38 | |
3cbc7af0 BK |
39 | _GLIBCXX_BEGIN_NAMESPACE(std) |
40 | ||
0479a462 | 41 | // Definitions for static const members of ios_base. |
b2dad0e3 BK |
42 | const ios_base::fmtflags ios_base::boolalpha; |
43 | const ios_base::fmtflags ios_base::dec; | |
44 | const ios_base::fmtflags ios_base::fixed; | |
45 | const ios_base::fmtflags ios_base::hex; | |
46 | const ios_base::fmtflags ios_base::internal; | |
47 | const ios_base::fmtflags ios_base::left; | |
48 | const ios_base::fmtflags ios_base::oct; | |
49 | const ios_base::fmtflags ios_base::right; | |
50 | const ios_base::fmtflags ios_base::scientific; | |
51 | const ios_base::fmtflags ios_base::showbase; | |
52 | const ios_base::fmtflags ios_base::showpoint; | |
53 | const ios_base::fmtflags ios_base::showpos; | |
54 | const ios_base::fmtflags ios_base::skipws; | |
55 | const ios_base::fmtflags ios_base::unitbuf; | |
56 | const ios_base::fmtflags ios_base::uppercase; | |
57 | const ios_base::fmtflags ios_base::adjustfield; | |
58 | const ios_base::fmtflags ios_base::basefield; | |
59 | const ios_base::fmtflags ios_base::floatfield; | |
60 | ||
61 | const ios_base::iostate ios_base::badbit; | |
62 | const ios_base::iostate ios_base::eofbit; | |
63 | const ios_base::iostate ios_base::failbit; | |
64 | const ios_base::iostate ios_base::goodbit; | |
65 | ||
66 | const ios_base::openmode ios_base::app; | |
67 | const ios_base::openmode ios_base::ate; | |
68 | const ios_base::openmode ios_base::binary; | |
69 | const ios_base::openmode ios_base::in; | |
70 | const ios_base::openmode ios_base::out; | |
71 | const ios_base::openmode ios_base::trunc; | |
72 | ||
73 | const ios_base::seekdir ios_base::beg; | |
74 | const ios_base::seekdir ios_base::cur; | |
75 | const ios_base::seekdir ios_base::end; | |
76 | ||
fa972243 | 77 | _Atomic_word ios_base::Init::_S_refcount; |
c755e77d | 78 | |
469550eb | 79 | bool ios_base::Init::_S_synced_with_stdio = true; |
0479a462 | 80 | |
c755e77d | 81 | ios_base::ios_base() |
26c691a8 BK |
82 | : _M_precision(), _M_width(), _M_flags(), _M_exception(), |
83 | _M_streambuf_state(), _M_callbacks(0), _M_word_zero(), | |
84 | _M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale() | |
5de197f2 | 85 | { |
c755e77d BK |
86 | // Do nothing: basic_ios::init() does it. |
87 | // NB: _M_callbacks and _M_word must be zero for non-initialized | |
88 | // ios_base to go through ~ios_base gracefully. | |
5de197f2 | 89 | } |
c755e77d BK |
90 | |
91 | // 27.4.2.7 ios_base constructors/destructors | |
92 | ios_base::~ios_base() | |
b2dad0e3 | 93 | { |
c755e77d BK |
94 | _M_call_callbacks(erase_event); |
95 | _M_dispose_callbacks(); | |
96 | if (_M_word != _M_local_word) | |
2aacd735 | 97 | { |
c755e77d BK |
98 | delete [] _M_word; |
99 | _M_word = 0; | |
2aacd735 | 100 | } |
c755e77d | 101 | } |
b2dad0e3 BK |
102 | |
103 | // 27.4.2.5 ios_base storage functions | |
104 | int | |
105 | ios_base::xalloc() throw() | |
106 | { | |
17325050 AP |
107 | // Implementation note: Initialize top to zero to ensure that |
108 | // initialization occurs before main() is started. | |
663653eb | 109 | static _Atomic_word _S_top = 0; |
b7ee72de | 110 | return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4; |
b2dad0e3 BK |
111 | } |
112 | ||
c755e77d BK |
113 | void |
114 | ios_base::register_callback(event_callback __fn, int __index) | |
115 | { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); } | |
116 | ||
b2dad0e3 BK |
117 | // 27.4.2.5 iword/pword storage |
118 | ios_base::_Words& | |
705debec | 119 | ios_base::_M_grow_words(int __ix, bool __iword) |
b2dad0e3 | 120 | { |
705debec PC |
121 | // Precondition: _M_word_size <= __ix |
122 | int __newsize = _S_local_word_size; | |
123 | _Words* __words = _M_local_word; | |
124 | if (__ix > _S_local_word_size - 1) | |
b2dad0e3 | 125 | { |
705debec | 126 | if (__ix < numeric_limits<int>::max()) |
d02475fd | 127 | { |
705debec | 128 | __newsize = __ix + 1; |
bc2631e0 | 129 | __try |
705debec | 130 | { __words = new _Words[__newsize]; } |
bc2631e0 | 131 | __catch(...) |
d02475fd | 132 | { |
d02475fd BK |
133 | _M_streambuf_state |= badbit; |
134 | if (_M_streambuf_state & _M_exception) | |
ba9119ec PC |
135 | __throw_ios_failure(__N("ios_base::_M_grow_words " |
136 | "allocation failed")); | |
705debec | 137 | if (__iword) |
2a837cf8 JQ |
138 | _M_word_zero._M_iword = 0; |
139 | else | |
140 | _M_word_zero._M_pword = 0; | |
d02475fd BK |
141 | return _M_word_zero; |
142 | } | |
705debec PC |
143 | for (int __i = 0; __i < _M_word_size; __i++) |
144 | __words[__i] = _M_word[__i]; | |
d02475fd BK |
145 | if (_M_word && _M_word != _M_local_word) |
146 | { | |
147 | delete [] _M_word; | |
148 | _M_word = 0; | |
149 | } | |
150 | } | |
663653eb | 151 | else |
b2dad0e3 | 152 | { |
663653eb | 153 | _M_streambuf_state |= badbit; |
c524ed5d | 154 | if (_M_streambuf_state & _M_exception) |
ba9119ec | 155 | __throw_ios_failure(__N("ios_base::_M_grow_words is not valid")); |
705debec | 156 | if (__iword) |
2a837cf8 JQ |
157 | _M_word_zero._M_iword = 0; |
158 | else | |
159 | _M_word_zero._M_pword = 0; | |
663653eb BK |
160 | return _M_word_zero; |
161 | } | |
b2dad0e3 | 162 | } |
705debec PC |
163 | _M_word = __words; |
164 | _M_word_size = __newsize; | |
165 | return _M_word[__ix]; | |
b2dad0e3 | 166 | } |
b2dad0e3 BK |
167 | |
168 | void | |
169 | ios_base::_M_call_callbacks(event __e) throw() | |
170 | { | |
1bc59af5 BK |
171 | _Callback_list* __p = _M_callbacks; |
172 | while (__p) | |
b2dad0e3 | 173 | { |
bc2631e0 | 174 | __try |
1bc59af5 | 175 | { (*__p->_M_fn) (__e, *this, __p->_M_index); } |
bc2631e0 | 176 | __catch(...) |
1bc59af5 BK |
177 | { } |
178 | __p = __p->_M_next; | |
b2dad0e3 BK |
179 | } |
180 | } | |
181 | ||
182 | void | |
183 | ios_base::_M_dispose_callbacks(void) | |
184 | { | |
185 | _Callback_list* __p = _M_callbacks; | |
186 | while (__p && __p->_M_remove_reference() == 0) | |
187 | { | |
188 | _Callback_list* __next = __p->_M_next; | |
189 | delete __p; | |
190 | __p = __next; | |
191 | } | |
192 | _M_callbacks = 0; | |
193 | } | |
3cbc7af0 BK |
194 | |
195 | _GLIBCXX_END_NAMESPACE |