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// basic_ios member functions -*- C++ -*- |
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// Copyright (C) 1999-2021 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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|
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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|
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file bits/basic_ios.tcc |
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* This is an internal header file, included by other library headers. |
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* Do not attempt to use it directly. @headername{ios} |
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*/ |
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|
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#ifndef _BASIC_IOS_TCC |
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#define _BASIC_IOS_TCC 1 |
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|
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#pragma GCC system_header |
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|
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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template<typename _CharT, typename _Traits> |
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void |
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basic_ios<_CharT, _Traits>::clear(iostate __state) |
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{ |
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if (this->rdbuf()) |
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_M_streambuf_state = __state; |
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else |
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_M_streambuf_state = __state | badbit; |
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if (this->exceptions() & this->rdstate()) |
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__throw_ios_failure(__N("basic_ios::clear")); |
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} |
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|
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template<typename _CharT, typename _Traits> |
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basic_streambuf<_CharT, _Traits>* |
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basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb) |
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{ |
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basic_streambuf<_CharT, _Traits>* __old = _M_streambuf; |
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_M_streambuf = __sb; |
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this->clear(); |
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return __old; |
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} |
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|
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template<typename _CharT, typename _Traits> |
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basic_ios<_CharT, _Traits>& |
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basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs) |
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{ |
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// _GLIBCXX_RESOLVE_LIB_DEFECTS |
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// 292. effects of a.copyfmt (a) |
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if (this != &__rhs) |
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{ |
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// Per 27.1.1, do not call imbue, yet must trash all caches |
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// associated with imbue() |
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|
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// Alloc any new word array first, so if it fails we have "rollback". |
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_Words* __words = (__rhs._M_word_size <= _S_local_word_size) ? |
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_M_local_word : new _Words[__rhs._M_word_size]; |
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|
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// Bump refs before doing callbacks, for safety. |
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_Callback_list* __cb = __rhs._M_callbacks; |
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if (__cb) |
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__cb->_M_add_reference(); |
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_M_call_callbacks(erase_event); |
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if (_M_word != _M_local_word) |
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{ |
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delete [] _M_word; |
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_M_word = 0; |
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} |
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_M_dispose_callbacks(); |
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|
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// NB: Don't want any added during above. |
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_M_callbacks = __cb; |
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for (int __i = 0; __i < __rhs._M_word_size; ++__i) |
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__words[__i] = __rhs._M_word[__i]; |
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_M_word = __words; |
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_M_word_size = __rhs._M_word_size; |
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|
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this->flags(__rhs.flags()); |
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this->width(__rhs.width()); |
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this->precision(__rhs.precision()); |
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this->tie(__rhs.tie()); |
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this->fill(__rhs.fill()); |
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_M_ios_locale = __rhs.getloc(); |
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_M_cache_locale(_M_ios_locale); |
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|
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_M_call_callbacks(copyfmt_event); |
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|
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// The next is required to be the last assignment. |
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this->exceptions(__rhs.exceptions()); |
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} |
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return *this; |
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} |
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|
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// Locales: |
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template<typename _CharT, typename _Traits> |
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locale |
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basic_ios<_CharT, _Traits>::imbue(const locale& __loc) |
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{ |
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locale __old(this->getloc()); |
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ios_base::imbue(__loc); |
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_M_cache_locale(__loc); |
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if (this->rdbuf() != 0) |
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this->rdbuf()->pubimbue(__loc); |
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return __old; |
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} |
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|
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template<typename _CharT, typename _Traits> |
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void |
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basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb) |
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{ |
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// NB: This may be called more than once on the same object. |
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ios_base::_M_init(); |
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|
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// Cache locale data and specific facets used by iostreams. |
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_M_cache_locale(_M_ios_locale); |
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|
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// NB: The 27.4.4.1 Postconditions Table specifies requirements |
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// after basic_ios::init() has been called. As part of this, |
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// fill() must return widen(' ') any time after init() has been |
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// called, which needs an imbued ctype facet of char_type to |
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// return without throwing an exception. Unfortunately, |
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// ctype<char_type> is not necessarily a required facet, so |
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// streams with char_type != [char, wchar_t] will not have it by |
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// default. Because of this, the correct value for _M_fill is |
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// constructed on the first call of fill(). That way, |
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// unformatted input and output with non-required basic_ios |
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// instantiations is possible even without imbuing the expected |
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// ctype<char_type> facet. |
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_M_fill = _CharT(); |
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_M_fill_init = false; |
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|
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_M_tie = 0; |
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_M_exception = goodbit; |
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_M_streambuf = __sb; |
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_M_streambuf_state = __sb ? goodbit : badbit; |
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} |
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|
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template<typename _CharT, typename _Traits> |
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void |
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basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc) |
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{ |
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if (__builtin_expect(has_facet<__ctype_type>(__loc), true)) |
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_M_ctype = std::__addressof(use_facet<__ctype_type>(__loc)); |
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else |
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_M_ctype = 0; |
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|
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if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) |
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_M_num_put = std::__addressof(use_facet<__num_put_type>(__loc)); |
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else |
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_M_num_put = 0; |
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|
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if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) |
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_M_num_get = std::__addressof(use_facet<__num_get_type>(__loc)); |
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else |
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_M_num_get = 0; |
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} |
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|
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// Inhibit implicit instantiations for required instantiations, |
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// which are defined via explicit instantiations elsewhere. |
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#if _GLIBCXX_EXTERN_TEMPLATE |
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extern template class basic_ios<char>; |
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|
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#ifdef _GLIBCXX_USE_WCHAR_T |
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extern template class basic_ios<wchar_t>; |
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#endif |
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#endif |
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|
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_GLIBCXX_END_NAMESPACE_VERSION |
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} // namespace std |
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|
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#endif |
