1// basic_ios member functions -*- C++ -*- 2 3// Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005 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 basic_ios<_CharT, _Traits>::clear(iostate __state) 46 { 47 if (this->rdbuf()) 48 _M_streambuf_state = __state; 49 else 50 _M_streambuf_state = __state | badbit; 51 if (this->exceptions() & this->rdstate()) 52 __throw_ios_failure(__N("basic_ios::clear")); 53 } 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 template<typename _CharT, typename _Traits> 116 char 117 basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const 118 { return __check_facet(_M_ctype).narrow(__c, __dfault); } 119 120 template<typename _CharT, typename _Traits> 121 _CharT 122 basic_ios<_CharT, _Traits>::widen(char __c) const 123 { return __check_facet(_M_ctype).widen(__c); } 124 125 // Locales: 126 template<typename _CharT, typename _Traits> 127 locale 128 basic_ios<_CharT, _Traits>::imbue(const locale& __loc) 129 { 130 locale __old(this->getloc()); 131 ios_base::imbue(__loc); 132 _M_cache_locale(__loc); 133 if (this->rdbuf() != 0) 134 this->rdbuf()->pubimbue(__loc); 135 return __old; 136 } 137 138 template<typename _CharT, typename _Traits> 139 void 140 basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) 141 { 142 // NB: This may be called more than once on the same object. 143 ios_base::_M_init(); 144 145 // Cache locale data and specific facets used by iostreams. 146 _M_cache_locale(_M_ios_locale); 147 148 // NB: The 27.4.4.1 Postconditions Table specifies requirements 149 // after basic_ios::init() has been called. As part of this, 150 // fill() must return widen(' ') any time after init() has been 151 // called, which needs an imbued ctype facet of char_type to 152 // return without throwing an exception. Unfortunately, 153 // ctype<char_type> is not necessarily a required facet, so 154 // streams with char_type != [char, wchar_t] will not have it by 155 // default. Because of this, the correct value for _M_fill is 156 // constructed on the first call of fill(). That way, 157 // unformatted input and output with non-required basic_ios 158 // instantiations is possible even without imbuing the expected 159 // ctype<char_type> facet. 160 _M_fill = _CharT(); 161 _M_fill_init = false; 162 163 _M_tie = 0; 164 _M_exception = goodbit; 165 _M_streambuf = __sb; 166 _M_streambuf_state = __sb ? goodbit : badbit; 167 } 168 169 template<typename _CharT, typename _Traits> 170 void 171 basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) 172 { 173 if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) 174 _M_ctype = &use_facet<__ctype_type>(__loc); 175 else 176 _M_ctype = 0; 177 178 if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) 179 _M_num_put = &use_facet<__num_put_type>(__loc); 180 else 181 _M_num_put = 0; 182 183 if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) 184 _M_num_get = &use_facet<__num_get_type>(__loc); 185 else 186 _M_num_get = 0; 187 } 188 189 // Inhibit implicit instantiations for required instantiations, 190 // which are defined via explicit instantiations elsewhere. 191 // NB: This syntax is a GNU extension. 192#if _GLIBCXX_EXTERN_TEMPLATE 193 extern template class basic_ios<char>; 194 195#ifdef _GLIBCXX_USE_WCHAR_T 196 extern template class basic_ios<wchar_t>; 197#endif 198#endif 199 200_GLIBCXX_END_NAMESPACE 201 202#endif 203