1 // basic_ios member functions -*- C++ -*- 2 3 // Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 2, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING. If not, write to the Free 18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 19 // USA. 20 21 // As a special exception, you may use this file as part of a free software 22 // library without restriction. Specifically, if other files instantiate 23 // templates or use macros or inline functions from this file, or you compile 24 // this file and link it with other files to produce an executable, this 25 // file does not by itself cause the resulting executable to be covered by 26 // the GNU General Public License. This exception does not however 27 // invalidate any other reasons why the executable file might be covered by 28 // the GNU General Public License. 29 30 #ifndef _BASIC_IOS_TCC 31 #define _BASIC_IOS_TCC 1 32 33 #pragma GCC system_header 34 35 namespace std 36 { 37 template<typename _CharT, typename _Traits> 38 void 39 basic_ios<_CharT, _Traits>::clear(iostate __state) 40 { 41 if (this->rdbuf()) 42 _M_streambuf_state = __state; 43 else 44 _M_streambuf_state = __state | badbit; 45 if (this->exceptions() & this->rdstate()) 46 __throw_ios_failure(__N("basic_ios::clear")); 47 } 48 49 template<typename _CharT, typename _Traits> 50 basic_streambuf<_CharT, _Traits>* 51 basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb) 52 { 53 basic_streambuf<_CharT, _Traits>* __old = _M_streambuf; 54 _M_streambuf = __sb; 55 this->clear(); 56 return __old; 57 } 58 59 template<typename _CharT, typename _Traits> 60 basic_ios<_CharT, _Traits>& 61 basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs) 62 { 63 // _GLIBCXX_RESOLVE_LIB_DEFECTS 64 // 292. effects of a.copyfmt (a) 65 if (this != &__rhs) 66 { 67 // Per 27.1.1, do not call imbue, yet must trash all caches 68 // associated with imbue() 69 70 // Alloc any new word array first, so if it fails we have "rollback". 71 _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ? 72 _M_local_word : new _Words[__rhs._M_word_size]; 73 74 // Bump refs before doing callbacks, for safety. 75 _Callback_list* __cb = __rhs._M_callbacks; 76 if (__cb) 77 __cb->_M_add_reference(); 78 _M_call_callbacks(erase_event); 79 if (_M_word != _M_local_word) 80 { 81 delete [] _M_word; 82 _M_word = 0; 83 } 84 _M_dispose_callbacks(); 85 86 // NB: Don't want any added during above. 87 _M_callbacks = __cb; 88 for (int __i = 0; __i < __rhs._M_word_size; ++__i) 89 __words[__i] = __rhs._M_word[__i]; 90 if (_M_word != _M_local_word) 91 { 92 delete [] _M_word; 93 _M_word = 0; 94 } 95 _M_word = __words; 96 _M_word_size = __rhs._M_word_size; 97 98 this->flags(__rhs.flags()); 99 this->width(__rhs.width()); 100 this->precision(__rhs.precision()); 101 this->tie(__rhs.tie()); 102 this->fill(__rhs.fill()); 103 _M_ios_locale = __rhs.getloc(); 104 _M_cache_locale(_M_ios_locale); 105 106 _M_call_callbacks(copyfmt_event); 107 108 // The next is required to be the last assignment. 109 this->exceptions(__rhs.exceptions()); 110 } 111 return *this; 112 } 113 114 template<typename _CharT, typename _Traits> 115 char 116 basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const 117 { return __check_facet(_M_ctype).narrow(__c, __dfault); } 118 119 template<typename _CharT, typename _Traits> 120 _CharT 121 basic_ios<_CharT, _Traits>::widen(char __c) const 122 { return __check_facet(_M_ctype).widen(__c); } 123 124 // Locales: 125 template<typename _CharT, typename _Traits> 126 locale 127 basic_ios<_CharT, _Traits>::imbue(const locale& __loc) 128 { 129 locale __old(this->getloc()); 130 ios_base::imbue(__loc); 131 _M_cache_locale(__loc); 132 if (this->rdbuf() != 0) 133 this->rdbuf()->pubimbue(__loc); 134 return __old; 135 } 136 137 template<typename _CharT, typename _Traits> 138 void 139 basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) 140 { 141 // NB: This may be called more than once on the same object. 142 ios_base::_M_init(); 143 144 // Cache locale data and specific facets used by iostreams. 145 _M_cache_locale(_M_ios_locale); 146 147 // NB: The 27.4.4.1 Postconditions Table specifies requirements 148 // after basic_ios::init() has been called. As part of this, 149 // fill() must return widen(' ') any time after init() has been 150 // called, which needs an imbued ctype facet of char_type to 151 // return without throwing an exception. Unfortunately, 152 // ctype<char_type> is not necessarily a required facet, so 153 // streams with char_type != [char, wchar_t] will not have it by 154 // default. Because of this, the correct value for _M_fill is 155 // constructed on the first call of fill(). That way, 156 // unformatted input and output with non-required basic_ios 157 // instantiations is possible even without imbuing the expected 158 // ctype<char_type> facet. 159 _M_fill = _CharT(); 160 _M_fill_init = false; 161 162 _M_tie = 0; 163 _M_exception = goodbit; 164 _M_streambuf = __sb; 165 _M_streambuf_state = __sb ? goodbit : badbit; 166 } 167 168 template<typename _CharT, typename _Traits> 169 void 170 basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) 171 { 172 if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) 173 _M_ctype = &use_facet<__ctype_type>(__loc); 174 else 175 _M_ctype = 0; 176 177 if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) 178 _M_num_put = &use_facet<__num_put_type>(__loc); 179 else 180 _M_num_put = 0; 181 182 if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) 183 _M_num_get = &use_facet<__num_get_type>(__loc); 184 else 185 _M_num_get = 0; 186 } 187 188 // Inhibit implicit instantiations for required instantiations, 189 // which are defined via explicit instantiations elsewhere. 190 // NB: This syntax is a GNU extension. 191 #if _GLIBCXX_EXTERN_TEMPLATE 192 extern template class basic_ios<char>; 193 194 #ifdef _GLIBCXX_USE_WCHAR_T 195 extern template class basic_ios<wchar_t>; 196 #endif 197 #endif 198 } // namespace std 199 200 #endif 201