// basic_ios member functions -*- C++ -*- // Copyright (C) 1999-2020 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file bits/basic_ios.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{ios} */ #ifndef _BASIC_IOS_TCC #define _BASIC_IOS_TCC 1 #pragma GCC system_header namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _CharT, typename _Traits> void basic_ios<_CharT, _Traits>::clear(iostate __state) { if (this->rdbuf()) _M_streambuf_state = __state; else _M_streambuf_state = __state | badbit; if (this->exceptions() & this->rdstate()) __throw_ios_failure(__N("basic_ios::clear")); } template<typename _CharT, typename _Traits> basic_streambuf<_CharT, _Traits>* basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb) { basic_streambuf<_CharT, _Traits>* __old = _M_streambuf; _M_streambuf = __sb; this->clear(); return __old; } template<typename _CharT, typename _Traits> basic_ios<_CharT, _Traits>& basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 292. effects of a.copyfmt (a) if (this != &__rhs) { // Per 27.1.1, do not call imbue, yet must trash all caches // associated with imbue() // Alloc any new word array first, so if it fails we have "rollback". _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ? _M_local_word : new _Words[__rhs._M_word_size]; // Bump refs before doing callbacks, for safety. _Callback_list* __cb = __rhs._M_callbacks; if (__cb) __cb->_M_add_reference(); _M_call_callbacks(erase_event); if (_M_word != _M_local_word) { delete [] _M_word; _M_word = 0; } _M_dispose_callbacks(); // NB: Don't want any added during above. _M_callbacks = __cb; for (int __i = 0; __i < __rhs._M_word_size; ++__i) __words[__i] = __rhs._M_word[__i]; _M_word = __words; _M_word_size = __rhs._M_word_size; this->flags(__rhs.flags()); this->width(__rhs.width()); this->precision(__rhs.precision()); this->tie(__rhs.tie()); this->fill(__rhs.fill()); _M_ios_locale = __rhs.getloc(); _M_cache_locale(_M_ios_locale); _M_call_callbacks(copyfmt_event); // The next is required to be the last assignment. this->exceptions(__rhs.exceptions()); } return *this; } // Locales: template<typename _CharT, typename _Traits> locale basic_ios<_CharT, _Traits>::imbue(const locale& __loc) { locale __old(this->getloc()); ios_base::imbue(__loc); _M_cache_locale(__loc); if (this->rdbuf() != 0) this->rdbuf()->pubimbue(__loc); return __old; } template<typename _CharT, typename _Traits> void basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) { // NB: This may be called more than once on the same object. ios_base::_M_init(); // Cache locale data and specific facets used by iostreams. _M_cache_locale(_M_ios_locale); // NB: The 27.4.4.1 Postconditions Table specifies requirements // after basic_ios::init() has been called. As part of this, // fill() must return widen(' ') any time after init() has been // called, which needs an imbued ctype facet of char_type to // return without throwing an exception. Unfortunately, // ctype<char_type> is not necessarily a required facet, so // streams with char_type != [char, wchar_t] will not have it by // default. Because of this, the correct value for _M_fill is // constructed on the first call of fill(). That way, // unformatted input and output with non-required basic_ios // instantiations is possible even without imbuing the expected // ctype<char_type> facet. _M_fill = _CharT(); _M_fill_init = false; _M_tie = 0; _M_exception = goodbit; _M_streambuf = __sb; _M_streambuf_state = __sb ? goodbit : badbit; } template<typename _CharT, typename _Traits> void basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) { if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) _M_ctype = std::__addressof(use_facet<__ctype_type>(__loc)); else _M_ctype = 0; if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) _M_num_put = std::__addressof(use_facet<__num_put_type>(__loc)); else _M_num_put = 0; if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) _M_num_get = std::__addressof(use_facet<__num_get_type>(__loc)); else _M_num_get = 0; } // Inhibit implicit instantiations for required instantiations, // which are defined via explicit instantiations elsewhere. #if _GLIBCXX_EXTERN_TEMPLATE extern template class basic_ios<char>; #ifdef _GLIBCXX_USE_WCHAR_T extern template class basic_ios<wchar_t>; #endif #endif _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif