// Iostreams base classes -*- C++ -*- // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, // 2006, 2007, 2008, 2009, 2010 // 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 // . // // ISO C++ 14882: 27.4 Iostreams base classes // #include #include _GLIBCXX_BEGIN_NAMESPACE(std) // Definitions for static const members of ios_base. const ios_base::fmtflags ios_base::boolalpha; const ios_base::fmtflags ios_base::dec; const ios_base::fmtflags ios_base::fixed; const ios_base::fmtflags ios_base::hex; const ios_base::fmtflags ios_base::internal; const ios_base::fmtflags ios_base::left; const ios_base::fmtflags ios_base::oct; const ios_base::fmtflags ios_base::right; const ios_base::fmtflags ios_base::scientific; const ios_base::fmtflags ios_base::showbase; const ios_base::fmtflags ios_base::showpoint; const ios_base::fmtflags ios_base::showpos; const ios_base::fmtflags ios_base::skipws; const ios_base::fmtflags ios_base::unitbuf; const ios_base::fmtflags ios_base::uppercase; const ios_base::fmtflags ios_base::adjustfield; const ios_base::fmtflags ios_base::basefield; const ios_base::fmtflags ios_base::floatfield; const ios_base::iostate ios_base::badbit; const ios_base::iostate ios_base::eofbit; const ios_base::iostate ios_base::failbit; const ios_base::iostate ios_base::goodbit; const ios_base::openmode ios_base::app; const ios_base::openmode ios_base::ate; const ios_base::openmode ios_base::binary; const ios_base::openmode ios_base::in; const ios_base::openmode ios_base::out; const ios_base::openmode ios_base::trunc; const ios_base::seekdir ios_base::beg; const ios_base::seekdir ios_base::cur; const ios_base::seekdir ios_base::end; _Atomic_word ios_base::Init::_S_refcount; bool ios_base::Init::_S_synced_with_stdio = true; ios_base::ios_base() throw() : _M_precision(), _M_width(), _M_flags(), _M_exception(), _M_streambuf_state(), _M_callbacks(0), _M_word_zero(), _M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale() { // Do nothing: basic_ios::init() does it. // NB: _M_callbacks and _M_word must be zero for non-initialized // ios_base to go through ~ios_base gracefully. } // 27.4.2.7 ios_base constructors/destructors ios_base::~ios_base() { _M_call_callbacks(erase_event); _M_dispose_callbacks(); if (_M_word != _M_local_word) { delete [] _M_word; _M_word = 0; } } // 27.4.2.5 ios_base storage functions int ios_base::xalloc() throw() { // Implementation note: Initialize top to zero to ensure that // initialization occurs before main() is started. static _Atomic_word _S_top = 0; return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4; } void ios_base::register_callback(event_callback __fn, int __index) { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); } // 27.4.2.5 iword/pword storage ios_base::_Words& ios_base::_M_grow_words(int __ix, bool __iword) { // Precondition: _M_word_size <= __ix int __newsize = _S_local_word_size; _Words* __words = _M_local_word; if (__ix > _S_local_word_size - 1) { if (__ix < numeric_limits::max()) { __newsize = __ix + 1; __try { __words = new _Words[__newsize]; } __catch(const std::bad_alloc&) { _M_streambuf_state |= badbit; if (_M_streambuf_state & _M_exception) __throw_ios_failure(__N("ios_base::_M_grow_words " "allocation failed")); if (__iword) _M_word_zero._M_iword = 0; else _M_word_zero._M_pword = 0; return _M_word_zero; } for (int __i = 0; __i < _M_word_size; __i++) __words[__i] = _M_word[__i]; if (_M_word && _M_word != _M_local_word) { delete [] _M_word; _M_word = 0; } } else { _M_streambuf_state |= badbit; if (_M_streambuf_state & _M_exception) __throw_ios_failure(__N("ios_base::_M_grow_words is not valid")); if (__iword) _M_word_zero._M_iword = 0; else _M_word_zero._M_pword = 0; return _M_word_zero; } } _M_word = __words; _M_word_size = __newsize; return _M_word[__ix]; } void ios_base::_M_call_callbacks(event __e) throw() { _Callback_list* __p = _M_callbacks; while (__p) { __try { (*__p->_M_fn) (__e, *this, __p->_M_index); } __catch(...) { } __p = __p->_M_next; } } void ios_base::_M_dispose_callbacks(void) throw() { _Callback_list* __p = _M_callbacks; while (__p && __p->_M_remove_reference() == 0) { _Callback_list* __next = __p->_M_next; delete __p; __p = __next; } _M_callbacks = 0; } _GLIBCXX_END_NAMESPACE