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1 : : // basic_ios member functions -*- C++ -*-
2 : :
3 : : // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 : : // Free Software Foundation, Inc.
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
19 : : // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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 : : /** @file basic_ios.tcc
32 : : * This is an internal header file, included by other library headers.
33 : : * You should not attempt to use it directly.
34 : : */
35 : :
36 : : #ifndef _BASIC_IOS_TCC
37 : : #define _BASIC_IOS_TCC 1
38 : :
39 : : #pragma GCC system_header
40 : :
41 : : _GLIBCXX_BEGIN_NAMESPACE(std)
42 : :
43 : : template<typename _CharT, typename _Traits>
44 : : void
45 : 55 : basic_ios<_CharT, _Traits>::clear(iostate __state)
46 : : {
47 [ + - ]: 55 : if (this->rdbuf())
48 : 55 : _M_streambuf_state = __state;
49 : : else
50 : 0 : _M_streambuf_state = __state | badbit;
51 [ - + ]: 55 : if (this->exceptions() & this->rdstate())
52 : 0 : __throw_ios_failure(__N("basic_ios::clear"));
53 : 55 : }
54 : :
55 : : template<typename _CharT, typename _Traits>
56 : : basic_streambuf<_CharT, _Traits>*
57 : : basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb)
58 : : {
59 : : basic_streambuf<_CharT, _Traits>* __old = _M_streambuf;
60 : : _M_streambuf = __sb;
61 : : this->clear();
62 : : return __old;
63 : : }
64 : :
65 : : template<typename _CharT, typename _Traits>
66 : : basic_ios<_CharT, _Traits>&
67 : : basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
68 : : {
69 : : // _GLIBCXX_RESOLVE_LIB_DEFECTS
70 : : // 292. effects of a.copyfmt (a)
71 : : if (this != &__rhs)
72 : : {
73 : : // Per 27.1.1, do not call imbue, yet must trash all caches
74 : : // associated with imbue()
75 : :
76 : : // Alloc any new word array first, so if it fails we have "rollback".
77 : : _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ?
78 : : _M_local_word : new _Words[__rhs._M_word_size];
79 : :
80 : : // Bump refs before doing callbacks, for safety.
81 : : _Callback_list* __cb = __rhs._M_callbacks;
82 : : if (__cb)
83 : : __cb->_M_add_reference();
84 : : _M_call_callbacks(erase_event);
85 : : if (_M_word != _M_local_word)
86 : : {
87 : : delete [] _M_word;
88 : : _M_word = 0;
89 : : }
90 : : _M_dispose_callbacks();
91 : :
92 : : // NB: Don't want any added during above.
93 : : _M_callbacks = __cb;
94 : : for (int __i = 0; __i < __rhs._M_word_size; ++__i)
95 : : __words[__i] = __rhs._M_word[__i];
96 : : _M_word = __words;
97 : : _M_word_size = __rhs._M_word_size;
98 : :
99 : : this->flags(__rhs.flags());
100 : : this->width(__rhs.width());
101 : : this->precision(__rhs.precision());
102 : : this->tie(__rhs.tie());
103 : : this->fill(__rhs.fill());
104 : : _M_ios_locale = __rhs.getloc();
105 : : _M_cache_locale(_M_ios_locale);
106 : :
107 : : _M_call_callbacks(copyfmt_event);
108 : :
109 : : // The next is required to be the last assignment.
110 : : this->exceptions(__rhs.exceptions());
111 : : }
112 : : return *this;
113 : : }
114 : :
115 : : // Locales:
116 : : template<typename _CharT, typename _Traits>
117 : : locale
118 : : basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
119 : : {
120 : : locale __old(this->getloc());
121 : : ios_base::imbue(__loc);
122 : : _M_cache_locale(__loc);
123 : : if (this->rdbuf() != 0)
124 : : this->rdbuf()->pubimbue(__loc);
125 : : return __old;
126 : : }
127 : :
128 : : template<typename _CharT, typename _Traits>
129 : : void
130 : 530316 : basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb)
131 : : {
132 : : // NB: This may be called more than once on the same object.
133 : 530316 : ios_base::_M_init();
134 : :
135 : : // Cache locale data and specific facets used by iostreams.
136 : 530316 : _M_cache_locale(_M_ios_locale);
137 : :
138 : : // NB: The 27.4.4.1 Postconditions Table specifies requirements
139 : : // after basic_ios::init() has been called. As part of this,
140 : : // fill() must return widen(' ') any time after init() has been
141 : : // called, which needs an imbued ctype facet of char_type to
142 : : // return without throwing an exception. Unfortunately,
143 : : // ctype<char_type> is not necessarily a required facet, so
144 : : // streams with char_type != [char, wchar_t] will not have it by
145 : : // default. Because of this, the correct value for _M_fill is
146 : : // constructed on the first call of fill(). That way,
147 : : // unformatted input and output with non-required basic_ios
148 : : // instantiations is possible even without imbuing the expected
149 : : // ctype<char_type> facet.
150 : 530316 : _M_fill = _CharT();
151 : 530316 : _M_fill_init = false;
152 : :
153 : 530316 : _M_tie = 0;
154 : 530316 : _M_exception = goodbit;
155 : 530316 : _M_streambuf = __sb;
156 [ + + ]: 530316 : _M_streambuf_state = __sb ? goodbit : badbit;
157 : 530316 : }
158 : :
159 : : template<typename _CharT, typename _Traits>
160 : : void
161 : 0 : basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc)
162 : : {
163 [ # # ]: 0 : if (__builtin_expect(has_facet<__ctype_type>(__loc), true))
164 : 0 : _M_ctype = &use_facet<__ctype_type>(__loc);
165 : : else
166 : 0 : _M_ctype = 0;
167 : :
168 [ # # ]: 0 : if (__builtin_expect(has_facet<__num_put_type>(__loc), true))
169 : 0 : _M_num_put = &use_facet<__num_put_type>(__loc);
170 : : else
171 : 0 : _M_num_put = 0;
172 : :
173 [ # # ]: 0 : if (__builtin_expect(has_facet<__num_get_type>(__loc), true))
174 : 0 : _M_num_get = &use_facet<__num_get_type>(__loc);
175 : : else
176 : 0 : _M_num_get = 0;
177 : 0 : }
178 : :
179 : : // Inhibit implicit instantiations for required instantiations,
180 : : // which are defined via explicit instantiations elsewhere.
181 : : // NB: This syntax is a GNU extension.
182 : : #if _GLIBCXX_EXTERN_TEMPLATE
183 : : extern template class _GLIBCXX_IMPORT basic_ios<char>;
184 : :
185 : : #ifdef _GLIBCXX_USE_WCHAR_T
186 : : extern template class _GLIBCXX_IMPORT basic_ios<wchar_t>;
187 : : #endif
188 : : #endif
189 : :
190 : : _GLIBCXX_END_NAMESPACE
191 : :
192 : : #endif
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