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Diffstat (limited to 'libstdc++-v3/src/list.cc')
| -rw-r--r-- | libstdc++-v3/src/list.cc | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/libstdc++-v3/src/list.cc b/libstdc++-v3/src/list.cc new file mode 100644 index 000000000..92b007f58 --- /dev/null +++ b/libstdc++-v3/src/list.cc @@ -0,0 +1,144 @@ +// std::list utilities implementation -*- C++ -*- + +// Copyright (C) 2003, 2005, 2009, 2010, 2011 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/>. + +/* + * + * Copyright (c) 1994 + * Hewlett-Packard Company + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Hewlett-Packard Company makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * + * Copyright (c) 1996,1997 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +#include <list> + +namespace std _GLIBCXX_VISIBILITY(default) +{ + namespace __detail + { + _GLIBCXX_BEGIN_NAMESPACE_VERSION + + void + _List_node_base::swap(_List_node_base& __x, _List_node_base& __y) throw() + { + if ( __x._M_next != &__x ) + { + if ( __y._M_next != &__y ) + { + // Both __x and __y are not empty. + std::swap(__x._M_next,__y._M_next); + std::swap(__x._M_prev,__y._M_prev); + __x._M_next->_M_prev = __x._M_prev->_M_next = &__x; + __y._M_next->_M_prev = __y._M_prev->_M_next = &__y; + } + else + { + // __x is not empty, __y is empty. + __y._M_next = __x._M_next; + __y._M_prev = __x._M_prev; + __y._M_next->_M_prev = __y._M_prev->_M_next = &__y; + __x._M_next = __x._M_prev = &__x; + } + } + else if ( __y._M_next != &__y ) + { + // __x is empty, __y is not empty. + __x._M_next = __y._M_next; + __x._M_prev = __y._M_prev; + __x._M_next->_M_prev = __x._M_prev->_M_next = &__x; + __y._M_next = __y._M_prev = &__y; + } + } + + void + _List_node_base::_M_transfer(_List_node_base * const __first, + _List_node_base * const __last) throw() + { + if (this != __last) + { + // Remove [first, last) from its old position. + __last->_M_prev->_M_next = this; + __first->_M_prev->_M_next = __last; + this->_M_prev->_M_next = __first; + + // Splice [first, last) into its new position. + _List_node_base* const __tmp = this->_M_prev; + this->_M_prev = __last->_M_prev; + __last->_M_prev = __first->_M_prev; + __first->_M_prev = __tmp; + } + } + + void + _List_node_base::_M_reverse() throw() + { + _List_node_base* __tmp = this; + do + { + std::swap(__tmp->_M_next, __tmp->_M_prev); + + // Old next node is now prev. + __tmp = __tmp->_M_prev; + } + while (__tmp != this); + } + + void + _List_node_base::_M_hook(_List_node_base* const __position) throw() + { + this->_M_next = __position; + this->_M_prev = __position->_M_prev; + __position->_M_prev->_M_next = this; + __position->_M_prev = this; + } + + void + _List_node_base::_M_unhook() throw() + { + _List_node_base* const __next_node = this->_M_next; + _List_node_base* const __prev_node = this->_M_prev; + __prev_node->_M_next = __next_node; + __next_node->_M_prev = __prev_node; + } + + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace __detail +} // namespace std |