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1 | // Iostreams base classes -*- C++ -*- |
2 | ||
3cbc7af0 | 3 | // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
17325050 | 4 | // Free Software Foundation, Inc. |
b2dad0e3 BK |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 2, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING. If not, write to the Free | |
83f51799 | 19 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
b2dad0e3 BK |
20 | // USA. |
21 | ||
22 | // As a special exception, you may use this file as part of a free software | |
23 | // library without restriction. Specifically, if other files instantiate | |
24 | // templates or use macros or inline functions from this file, or you compile | |
25 | // this file and link it with other files to produce an executable, this | |
26 | // file does not by itself cause the resulting executable to be covered by | |
27 | // the GNU General Public License. This exception does not however | |
28 | // invalidate any other reasons why the executable file might be covered by | |
29 | // the GNU General Public License. | |
30 | ||
31 | // | |
32 | // ISO C++ 14882: 27.4 Iostreams base classes | |
33 | // | |
34 | ||
54c1bf78 | 35 | #include <ios> |
c755e77d | 36 | #include <limits> |
17325050 | 37 | #include <bits/atomicity.h> |
a7817e1d | 38 | |
3cbc7af0 BK |
39 | _GLIBCXX_BEGIN_NAMESPACE(std) |
40 | ||
bd80bd9b BK |
41 | // XXX GLIBCXX_ABI Deprecated |
42 | // Definitions for static const data members of __ios_flags. | |
0479a462 BK |
43 | const __ios_flags::__int_type __ios_flags::_S_boolalpha; |
44 | const __ios_flags::__int_type __ios_flags::_S_dec; | |
45 | const __ios_flags::__int_type __ios_flags::_S_fixed; | |
46 | const __ios_flags::__int_type __ios_flags::_S_hex; | |
47 | const __ios_flags::__int_type __ios_flags::_S_internal; | |
48 | const __ios_flags::__int_type __ios_flags::_S_left; | |
49 | const __ios_flags::__int_type __ios_flags::_S_oct; | |
50 | const __ios_flags::__int_type __ios_flags::_S_right; | |
51 | const __ios_flags::__int_type __ios_flags::_S_scientific; | |
52 | const __ios_flags::__int_type __ios_flags::_S_showbase; | |
53 | const __ios_flags::__int_type __ios_flags::_S_showpoint; | |
54 | const __ios_flags::__int_type __ios_flags::_S_showpos; | |
55 | const __ios_flags::__int_type __ios_flags::_S_skipws; | |
56 | const __ios_flags::__int_type __ios_flags::_S_unitbuf; | |
57 | const __ios_flags::__int_type __ios_flags::_S_uppercase; | |
58 | const __ios_flags::__int_type __ios_flags::_S_adjustfield; | |
59 | const __ios_flags::__int_type __ios_flags::_S_basefield; | |
60 | const __ios_flags::__int_type __ios_flags::_S_floatfield; | |
61 | ||
62 | const __ios_flags::__int_type __ios_flags::_S_badbit; | |
63 | const __ios_flags::__int_type __ios_flags::_S_eofbit; | |
64 | const __ios_flags::__int_type __ios_flags::_S_failbit; | |
65 | ||
66 | const __ios_flags::__int_type __ios_flags::_S_app; | |
67 | const __ios_flags::__int_type __ios_flags::_S_ate; | |
68 | const __ios_flags::__int_type __ios_flags::_S_bin; | |
69 | const __ios_flags::__int_type __ios_flags::_S_in; | |
70 | const __ios_flags::__int_type __ios_flags::_S_out; | |
71 | const __ios_flags::__int_type __ios_flags::_S_trunc; | |
72 | ||
73 | // Definitions for static const members of ios_base. | |
b2dad0e3 BK |
74 | const ios_base::fmtflags ios_base::boolalpha; |
75 | const ios_base::fmtflags ios_base::dec; | |
76 | const ios_base::fmtflags ios_base::fixed; | |
77 | const ios_base::fmtflags ios_base::hex; | |
78 | const ios_base::fmtflags ios_base::internal; | |
79 | const ios_base::fmtflags ios_base::left; | |
80 | const ios_base::fmtflags ios_base::oct; | |
81 | const ios_base::fmtflags ios_base::right; | |
82 | const ios_base::fmtflags ios_base::scientific; | |
83 | const ios_base::fmtflags ios_base::showbase; | |
84 | const ios_base::fmtflags ios_base::showpoint; | |
85 | const ios_base::fmtflags ios_base::showpos; | |
86 | const ios_base::fmtflags ios_base::skipws; | |
87 | const ios_base::fmtflags ios_base::unitbuf; | |
88 | const ios_base::fmtflags ios_base::uppercase; | |
89 | const ios_base::fmtflags ios_base::adjustfield; | |
90 | const ios_base::fmtflags ios_base::basefield; | |
91 | const ios_base::fmtflags ios_base::floatfield; | |
92 | ||
93 | const ios_base::iostate ios_base::badbit; | |
94 | const ios_base::iostate ios_base::eofbit; | |
95 | const ios_base::iostate ios_base::failbit; | |
96 | const ios_base::iostate ios_base::goodbit; | |
97 | ||
98 | const ios_base::openmode ios_base::app; | |
99 | const ios_base::openmode ios_base::ate; | |
100 | const ios_base::openmode ios_base::binary; | |
101 | const ios_base::openmode ios_base::in; | |
102 | const ios_base::openmode ios_base::out; | |
103 | const ios_base::openmode ios_base::trunc; | |
104 | ||
105 | const ios_base::seekdir ios_base::beg; | |
106 | const ios_base::seekdir ios_base::cur; | |
107 | const ios_base::seekdir ios_base::end; | |
108 | ||
663653eb | 109 | const int ios_base::_S_local_word_size; |
c755e77d | 110 | |
fa972243 | 111 | _Atomic_word ios_base::Init::_S_refcount; |
c755e77d | 112 | |
469550eb | 113 | bool ios_base::Init::_S_synced_with_stdio = true; |
0479a462 | 114 | |
c755e77d | 115 | ios_base::ios_base() |
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116 | : _M_precision(), _M_width(), _M_flags(), _M_exception(), |
117 | _M_streambuf_state(), _M_callbacks(0), _M_word_zero(), | |
118 | _M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale() | |
5de197f2 | 119 | { |
c755e77d BK |
120 | // Do nothing: basic_ios::init() does it. |
121 | // NB: _M_callbacks and _M_word must be zero for non-initialized | |
122 | // ios_base to go through ~ios_base gracefully. | |
5de197f2 | 123 | } |
c755e77d BK |
124 | |
125 | // 27.4.2.7 ios_base constructors/destructors | |
126 | ios_base::~ios_base() | |
b2dad0e3 | 127 | { |
c755e77d BK |
128 | _M_call_callbacks(erase_event); |
129 | _M_dispose_callbacks(); | |
130 | if (_M_word != _M_local_word) | |
2aacd735 | 131 | { |
c755e77d BK |
132 | delete [] _M_word; |
133 | _M_word = 0; | |
2aacd735 | 134 | } |
c755e77d | 135 | } |
b2dad0e3 BK |
136 | |
137 | // 27.4.2.5 ios_base storage functions | |
138 | int | |
139 | ios_base::xalloc() throw() | |
140 | { | |
17325050 AP |
141 | // Implementation note: Initialize top to zero to ensure that |
142 | // initialization occurs before main() is started. | |
663653eb | 143 | static _Atomic_word _S_top = 0; |
2c5d0ae8 | 144 | return __gnu_cxx::__exchange_and_add(&_S_top, 1) + 4; |
b2dad0e3 BK |
145 | } |
146 | ||
c755e77d BK |
147 | void |
148 | ios_base::register_callback(event_callback __fn, int __index) | |
149 | { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); } | |
150 | ||
b2dad0e3 BK |
151 | // 27.4.2.5 iword/pword storage |
152 | ios_base::_Words& | |
705debec | 153 | ios_base::_M_grow_words(int __ix, bool __iword) |
b2dad0e3 | 154 | { |
705debec PC |
155 | // Precondition: _M_word_size <= __ix |
156 | int __newsize = _S_local_word_size; | |
157 | _Words* __words = _M_local_word; | |
158 | if (__ix > _S_local_word_size - 1) | |
b2dad0e3 | 159 | { |
705debec | 160 | if (__ix < numeric_limits<int>::max()) |
d02475fd | 161 | { |
705debec | 162 | __newsize = __ix + 1; |
d02475fd | 163 | try |
705debec | 164 | { __words = new _Words[__newsize]; } |
d02475fd BK |
165 | catch (...) |
166 | { | |
d02475fd BK |
167 | _M_streambuf_state |= badbit; |
168 | if (_M_streambuf_state & _M_exception) | |
ba9119ec PC |
169 | __throw_ios_failure(__N("ios_base::_M_grow_words " |
170 | "allocation failed")); | |
705debec | 171 | if (__iword) |
2a837cf8 JQ |
172 | _M_word_zero._M_iword = 0; |
173 | else | |
174 | _M_word_zero._M_pword = 0; | |
d02475fd BK |
175 | return _M_word_zero; |
176 | } | |
705debec PC |
177 | for (int __i = 0; __i < _M_word_size; __i++) |
178 | __words[__i] = _M_word[__i]; | |
d02475fd BK |
179 | if (_M_word && _M_word != _M_local_word) |
180 | { | |
181 | delete [] _M_word; | |
182 | _M_word = 0; | |
183 | } | |
184 | } | |
663653eb | 185 | else |
b2dad0e3 | 186 | { |
663653eb | 187 | _M_streambuf_state |= badbit; |
c524ed5d | 188 | if (_M_streambuf_state & _M_exception) |
ba9119ec | 189 | __throw_ios_failure(__N("ios_base::_M_grow_words is not valid")); |
705debec | 190 | if (__iword) |
2a837cf8 JQ |
191 | _M_word_zero._M_iword = 0; |
192 | else | |
193 | _M_word_zero._M_pword = 0; | |
663653eb BK |
194 | return _M_word_zero; |
195 | } | |
b2dad0e3 | 196 | } |
705debec PC |
197 | _M_word = __words; |
198 | _M_word_size = __newsize; | |
199 | return _M_word[__ix]; | |
b2dad0e3 | 200 | } |
b2dad0e3 BK |
201 | |
202 | void | |
203 | ios_base::_M_call_callbacks(event __e) throw() | |
204 | { | |
1bc59af5 BK |
205 | _Callback_list* __p = _M_callbacks; |
206 | while (__p) | |
b2dad0e3 | 207 | { |
1bc59af5 BK |
208 | try |
209 | { (*__p->_M_fn) (__e, *this, __p->_M_index); } | |
210 | catch (...) | |
211 | { } | |
212 | __p = __p->_M_next; | |
b2dad0e3 BK |
213 | } |
214 | } | |
215 | ||
216 | void | |
217 | ios_base::_M_dispose_callbacks(void) | |
218 | { | |
219 | _Callback_list* __p = _M_callbacks; | |
220 | while (__p && __p->_M_remove_reference() == 0) | |
221 | { | |
222 | _Callback_list* __next = __p->_M_next; | |
223 | delete __p; | |
224 | __p = __next; | |
225 | } | |
226 | _M_callbacks = 0; | |
227 | } | |
3cbc7af0 BK |
228 | |
229 | _GLIBCXX_END_NAMESPACE |