basic_ios.tcc

00001 // basic_ios locale and locale-related member functions -*- C++ -*- 00002 00003 // Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 #ifndef _CPP_BITS_BASICIOS_TCC 00031 #define _CPP_BITS_BASICIOS_TCC 1 00032 00033 #pragma GCC system_header 00034 00035 namespace std 00036 { 00037 template<typename _CharT, typename _Traits> 00038 void 00039 basic_ios<_CharT, _Traits>::clear(iostate __state) 00040 { 00041 if (this->rdbuf()) 00042 _M_streambuf_state = __state; 00043 else 00044 _M_streambuf_state = __state | badbit; 00045 if ((this->rdstate() & this->exceptions())) 00046 __throw_ios_failure("basic_ios::clear(iostate) caused exception"); 00047 } 00048 00049 template<typename _CharT, typename _Traits> 00050 basic_streambuf<_CharT, _Traits>* 00051 basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb) 00052 { 00053 basic_streambuf<_CharT, _Traits>* __old = _M_streambuf; 00054 _M_streambuf = __sb; 00055 this->clear(); 00056 return __old; 00057 } 00058 00059 template<typename _CharT, typename _Traits> 00060 basic_ios<_CharT, _Traits>& 00061 basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs) 00062 { 00063 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00064 // 292. effects of a.copyfmt (a) 00065 if (this != &__rhs) 00066 { 00067 // Per 27.1.1.1, do not call imbue, yet must trash all caches 00068 // associated with imbue() 00069 00070 // Alloc any new word array first, so if it fails we have "rollback". 00071 _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ? 00072 _M_local_word : new _Words[__rhs._M_word_size]; 00073 00074 // Bump refs before doing callbacks, for safety. 00075 _Callback_list* __cb = __rhs._M_callbacks; 00076 if (__cb) 00077 __cb->_M_add_reference(); 00078 _M_call_callbacks(erase_event); 00079 if (_M_word != _M_local_word) 00080 { 00081 delete [] _M_word; 00082 _M_word = 0; 00083 } 00084 _M_dispose_callbacks(); 00085 00086 _M_callbacks = __cb; // NB: Don't want any added during above. 00087 for (int __i = 0; __i < __rhs._M_word_size; ++__i) 00088 __words[__i] = __rhs._M_word[__i]; 00089 if (_M_word != _M_local_word) 00090 { 00091 delete [] _M_word; 00092 _M_word = 0; 00093 } 00094 _M_word = __words; 00095 _M_word_size = __rhs._M_word_size; 00096 00097 this->flags(__rhs.flags()); 00098 this->width(__rhs.width()); 00099 this->precision(__rhs.precision()); 00100 this->tie(__rhs.tie()); 00101 this->fill(__rhs.fill()); 00102 _M_ios_locale = __rhs.getloc(); 00103 00104 // This removes the link to __rhs locale cache 00105 _M_call_callbacks(copyfmt_event); 00106 00107 _M_cache_locale(_M_ios_locale); 00108 00109 00110 // The next is required to be the last assignment. 00111 this->exceptions(__rhs.exceptions()); 00112 } 00113 return *this; 00114 } 00115 00116 template<typename _CharT, typename _Traits> 00117 char 00118 basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const 00119 { 00120 char __ret = __dfault; 00121 if (_M_check_facet(_M_fctype)) 00122 __ret = _M_fctype->narrow(__c, __dfault); 00123 return __ret; 00124 } 00125 00126 template<typename _CharT, typename _Traits> 00127 _CharT 00128 basic_ios<_CharT, _Traits>::widen(char __c) const 00129 { 00130 char_type __ret = char_type(); 00131 if (_M_check_facet(_M_fctype)) 00132 __ret = _M_fctype->widen(__c); 00133 return __ret; 00134 } 00135 00136 // Locales: 00137 template<typename _CharT, typename _Traits> 00138 locale 00139 basic_ios<_CharT, _Traits>::imbue(const locale& __loc) 00140 { 00141 locale __old(this->getloc()); 00142 ios_base::imbue(__loc); 00143 _M_cache_locale(__loc); 00144 if (this->rdbuf() != 0) 00145 this->rdbuf()->pubimbue(__loc); 00146 return __old; 00147 } 00148 00149 template<typename _CharT, typename _Traits> 00150 void 00151 basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) 00152 { 00153 // NB: This may be called more than once on the same object. 00154 ios_base::_M_init(); 00155 _M_cache_locale(_M_ios_locale); 00156 _M_tie = 0; 00157 00158 // NB: The 27.4.4.1 Postconditions Table specifies requirements 00159 // after basic_ios::init() has been called. As part of this, 00160 // fill() must return widen(' ') any time after init() has been 00161 // called, which needs an imbued ctype facet of char_type to 00162 // return without throwing an exception. Unfortunately, 00163 // ctype<char_type> is not necessarily a required facet, so 00164 // streams with char_type != [char, wchar_t] will not have it by 00165 // default. Because of this, the correct value for _M_fill is 00166 // constructed on the first call of fill(). That way, 00167 // unformatted input and output with non-required basic_ios 00168 // instantiations is possible even without imbuing the expected 00169 // ctype<char_type> facet. 00170 _M_fill = _CharT(); 00171 _M_fill_init = false; 00172 00173 _M_exception = goodbit; 00174 _M_streambuf = __sb; 00175 _M_streambuf_state = __sb ? goodbit : badbit; 00176 } 00177 00178 template<typename _CharT, typename _Traits> 00179 void 00180 basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) 00181 { 00182 if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) 00183 _M_fctype = &use_facet<__ctype_type>(__loc); 00184 else 00185 _M_fctype = 0; 00186 if (__builtin_expect(has_facet<__numput_type>(__loc), true)) 00187 _M_fnumput = &use_facet<__numput_type>(__loc); 00188 else 00189 _M_fnumput = 0; 00190 if (__builtin_expect(has_facet<__numget_type>(__loc), true)) 00191 _M_fnumget = &use_facet<__numget_type>(__loc); 00192 else 00193 _M_fnumget = 0; 00194 } 00195 00196 #if 1 00197 // XXX GLIBCXX_ABI Deprecated, compatibility only. 00198 template<typename _CharT, typename _Traits> 00199 void 00200 basic_ios<_CharT, _Traits>::_M_cache_facets(const locale& __loc) 00201 { 00202 if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) 00203 _M_fctype = &use_facet<__ctype_type>(__loc); 00204 if (__builtin_expect(has_facet<__numput_type>(__loc), true)) 00205 _M_fnumput = &use_facet<__numput_type>(__loc); 00206 if (__builtin_expect(has_facet<__numget_type>(__loc), true)) 00207 _M_fnumget = &use_facet<__numget_type>(__loc); 00208 } 00209 #endif 00210 00211 // Inhibit implicit instantiations for required instantiations, 00212 // which are defined via explicit instantiations elsewhere. 00213 // NB: This syntax is a GNU extension. 00214 #if _GLIBCPP_EXTERN_TEMPLATE 00215 extern template class basic_ios<char>; 00216 00217 #ifdef _GLIBCPP_USE_WCHAR_T 00218 extern template class basic_ios<wchar_t>; 00219 #endif 00220 #endif 00221 } // namespace std 00222 00223 #endif

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