| // basic_ios member functions -*- C++ -*- |
| |
| // Copyright (C) 1999-2015 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 = &use_facet<__ctype_type>(__loc); |
| else |
| _M_ctype = 0; |
| |
| if (__builtin_expect(has_facet<__num_put_type>(__loc), true)) |
| _M_num_put = &use_facet<__num_put_type>(__loc); |
| else |
| _M_num_put = 0; |
| |
| if (__builtin_expect(has_facet<__num_get_type>(__loc), true)) |
| _M_num_get = &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 |