1// basic_ios member functions -*- C++ -*- 2 3// Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 4// 2009, 2010, 2011 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 3, 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// Under Section 7 of GPL version 3, you are granted additional 18// permissions described in the GCC Runtime Library Exception, version 19// 3.1, as published by the Free Software Foundation. 20 21// You should have received a copy of the GNU General Public License and 22// a copy of the GCC Runtime Library Exception along with this program; 23// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24// <http://www.gnu.org/licenses/>. 25 26/** @file bits/basic_ios.tcc 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. @headername{ios} 29 */ 30 31#ifndef _BASIC_IOS_TCC 32#define _BASIC_IOS_TCC 1 33 34#pragma GCC system_header 35 36namespace std _GLIBCXX_VISIBILITY(default) 37{ 38_GLIBCXX_BEGIN_NAMESPACE_VERSION 39 40 template<typename _CharT, typename _Traits> 41 void 42 basic_ios<_CharT, _Traits>::clear(iostate __state) 43 { 44 if (this->rdbuf()) 45 _M_streambuf_state = __state; 46 else 47 _M_streambuf_state = __state | badbit; 48 if (this->exceptions() & this->rdstate()) 49 __throw_ios_failure(__N("basic_ios::clear")); 50 } 51 52 template<typename _CharT, typename _Traits> 53 basic_streambuf<_CharT, _Traits>* 54 basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb) 55 { 56 basic_streambuf<_CharT, _Traits>* __old = _M_streambuf; 57 _M_streambuf = __sb; 58 this->clear(); 59 return __old; 60 } 61 62 template<typename _CharT, typename _Traits> 63 basic_ios<_CharT, _Traits>& 64 basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs) 65 { 66 // _GLIBCXX_RESOLVE_LIB_DEFECTS 67 // 292. effects of a.copyfmt (a) 68 if (this != &__rhs) 69 { 70 // Per 27.1.1, do not call imbue, yet must trash all caches 71 // associated with imbue() 72 73 // Alloc any new word array first, so if it fails we have "rollback". 74 _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ? 75 _M_local_word : new _Words[__rhs._M_word_size]; 76 77 // Bump refs before doing callbacks, for safety. 78 _Callback_list* __cb = __rhs._M_callbacks; 79 if (__cb) 80 __cb->_M_add_reference(); 81 _M_call_callbacks(erase_event); 82 if (_M_word != _M_local_word) 83 { 84 delete [] _M_word; 85 _M_word = 0; 86 } 87 _M_dispose_callbacks(); 88 89 // NB: Don't want any added during above. 90 _M_callbacks = __cb; 91 for (int __i = 0; __i < __rhs._M_word_size; ++__i) 92 __words[__i] = __rhs._M_word[__i]; 93 _M_word = __words; 94 _M_word_size = __rhs._M_word_size; 95 96 this->flags(__rhs.flags()); 97 this->width(__rhs.width()); 98 this->precision(__rhs.precision()); 99 this->tie(__rhs.tie()); 100 this->fill(__rhs.fill()); 101 _M_ios_locale = __rhs.getloc(); 102 _M_cache_locale(_M_ios_locale); 103 104 _M_call_callbacks(copyfmt_event); 105 106 // The next is required to be the last assignment. 107 this->exceptions(__rhs.exceptions()); 108 } 109 return *this; 110 } 111 112 // Locales: 113 template<typename _CharT, typename _Traits> 114 locale 115 basic_ios<_CharT, _Traits>::imbue(const locale& __loc) 116 { 117 locale __old(this->getloc()); 118 ios_base::imbue(__loc); 119 _M_cache_locale(__loc); 120 if (this->rdbuf() != 0) 121 this->rdbuf()->pubimbue(__loc); 122 return __old; 123 } 124 125 template<typename _CharT, typename _Traits> 126 void 127 basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) 128 { 129 // NB: This may be called more than once on the same object. 130 ios_base::_M_init(); 131 132 // Cache locale data and specific facets used by iostreams. 133 _M_cache_locale(_M_ios_locale); 134 135 // NB: The 27.4.4.1 Postconditions Table specifies requirements 136 // after basic_ios::init() has been called. As part of this, 137 // fill() must return widen(' ') any time after init() has been 138 // called, which needs an imbued ctype facet of char_type to 139 // return without throwing an exception. Unfortunately, 140 // ctype<char_type> is not necessarily a required facet, so 141 // streams with char_type != [char, wchar_t] will not have it by 142 // default. Because of this, the correct value for _M_fill is 143 // constructed on the first call of fill(). That way, 144 // unformatted input and output with non-required basic_ios 145 // instantiations is possible even without imbuing the expected 146 // ctype<char_type> facet. 147 _M_fill = _CharT(); 148 _M_fill_init = false; 149 150 _M_tie = 0; 151 _M_exception = goodbit; 152 _M_streambuf = __sb; 153 _M_streambuf_state = __sb ? goodbit : badbit; 154 } 155 156 template<typename _CharT, typename _Traits> 157 void 158 basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) 159 { 160 if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) 161 _M_ctype = &use_facet<__ctype_type>(__loc); 162 else 163 _M_ctype = 0; 164 165 if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) 166 _M_num_put = &use_facet<__num_put_type>(__loc); 167 else 168 _M_num_put = 0; 169 170 if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) 171 _M_num_get = &use_facet<__num_get_type>(__loc); 172 else 173 _M_num_get = 0; 174 } 175 176 // Inhibit implicit instantiations for required instantiations, 177 // which are defined via explicit instantiations elsewhere. 178#if _GLIBCXX_EXTERN_TEMPLATE 179 extern template class basic_ios<char>; 180 181#ifdef _GLIBCXX_USE_WCHAR_T 182 extern template class basic_ios<wchar_t>; 183#endif 184#endif 185 186_GLIBCXX_END_NAMESPACE_VERSION 187} // namespace std 188 189#endif 190