--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file pairing_heap_/erase_fn_imps.hpp
+ * Contains an implementation class for a pairing heap.
+ */
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+pop()
+{
+ PB_DS_ASSERT_VALID((*this))
+ _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
+
+ node_pointer p_new_root = join_node_children(base_type::m_p_root);
+ PB_DS_ASSERT_NODE_CONSISTENT(p_new_root, false)
+ if (p_new_root != 0)
+ p_new_root->m_p_prev_or_parent = 0;
+
+ base_type::actual_erase_node(base_type::m_p_root);
+ base_type::m_p_root = p_new_root;
+ PB_DS_ASSERT_VALID((*this))
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+erase(point_iterator it)
+{
+ PB_DS_ASSERT_VALID((*this))
+ _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
+ remove_node(it.m_p_nd);
+ base_type::actual_erase_node(it.m_p_nd);
+ PB_DS_ASSERT_VALID((*this))
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+remove_node(node_pointer p_nd)
+{
+ PB_DS_ASSERT_VALID((*this))
+ _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
+ node_pointer p_new_child = join_node_children(p_nd);
+
+ PB_DS_ASSERT_NODE_CONSISTENT(p_new_child, false)
+
+ if (p_nd == base_type::m_p_root)
+ {
+ if (p_new_child != 0)
+ p_new_child->m_p_prev_or_parent = 0;
+ base_type::m_p_root = p_new_child;
+ PB_DS_ASSERT_NODE_CONSISTENT(base_type::m_p_root, false)
+ return;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_prev_or_parent != 0);
+ if (p_nd->m_p_prev_or_parent->m_p_l_child == p_nd)
+ {
+ if (p_new_child != 0)
+ {
+ p_new_child->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ p_new_child->m_p_next_sibling = p_nd->m_p_next_sibling;
+ if (p_new_child->m_p_next_sibling != 0)
+ p_new_child->m_p_next_sibling->m_p_prev_or_parent = p_new_child;
+ p_nd->m_p_prev_or_parent->m_p_l_child = p_new_child;
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd->m_p_prev_or_parent, false)
+ return;
+ }
+
+ p_nd->m_p_prev_or_parent->m_p_l_child = p_nd->m_p_next_sibling;
+ if (p_nd->m_p_next_sibling != 0)
+ p_nd->m_p_next_sibling->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd->m_p_prev_or_parent, false)
+ return;
+ }
+
+ if (p_new_child != 0)
+ {
+ p_new_child->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ p_new_child->m_p_next_sibling = p_nd->m_p_next_sibling;
+ if (p_new_child->m_p_next_sibling != 0)
+ p_new_child->m_p_next_sibling->m_p_prev_or_parent = p_new_child;
+ p_new_child->m_p_prev_or_parent->m_p_next_sibling = p_new_child;
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd->m_p_prev_or_parent, false)
+ return;
+ }
+
+ p_nd->m_p_prev_or_parent->m_p_next_sibling = p_nd->m_p_next_sibling;
+ if (p_nd->m_p_next_sibling != 0)
+ p_nd->m_p_next_sibling->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd->m_p_prev_or_parent, false)
+}
+
+PB_DS_CLASS_T_DEC
+typename PB_DS_CLASS_C_DEC::node_pointer
+PB_DS_CLASS_C_DEC::
+join_node_children(node_pointer p_nd)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
+ node_pointer p_ret = p_nd->m_p_l_child;
+ if (p_ret == 0)
+ return 0;
+ while (p_ret->m_p_next_sibling != 0)
+ p_ret = forward_join(p_ret, p_ret->m_p_next_sibling);
+ while (p_ret->m_p_prev_or_parent != p_nd)
+ p_ret = back_join(p_ret->m_p_prev_or_parent, p_ret);
+ PB_DS_ASSERT_NODE_CONSISTENT(p_ret, false)
+ return p_ret;
+}
+
+PB_DS_CLASS_T_DEC
+typename PB_DS_CLASS_C_DEC::node_pointer
+PB_DS_CLASS_C_DEC::
+forward_join(node_pointer p_nd, node_pointer p_next)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_next_sibling == p_next);
+ if (Cmp_Fn::operator()(p_nd->m_value, p_next->m_value))
+ {
+ p_next->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ base_type::make_child_of(p_nd, p_next);
+ return p_next->m_p_next_sibling == 0
+ ? p_next : p_next->m_p_next_sibling;
+ }
+
+ if (p_next->m_p_next_sibling != 0)
+ {
+ p_next->m_p_next_sibling->m_p_prev_or_parent = p_nd;
+ p_nd->m_p_next_sibling = p_next->m_p_next_sibling;
+ base_type::make_child_of(p_next, p_nd);
+ return p_nd->m_p_next_sibling;
+ }
+
+ p_nd->m_p_next_sibling = 0;
+ base_type::make_child_of(p_next, p_nd);
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd, false)
+ return p_nd;
+}
+
+PB_DS_CLASS_T_DEC
+typename PB_DS_CLASS_C_DEC::node_pointer
+PB_DS_CLASS_C_DEC::
+back_join(node_pointer p_nd, node_pointer p_next)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
+ _GLIBCXX_DEBUG_ASSERT(p_next->m_p_next_sibling == 0);
+
+ if (Cmp_Fn::operator()(p_nd->m_value, p_next->m_value))
+ {
+ p_next->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
+ base_type::make_child_of(p_nd, p_next);
+ PB_DS_ASSERT_NODE_CONSISTENT(p_next, false)
+ return p_next;
+ }
+
+ p_nd->m_p_next_sibling = 0;
+ base_type::make_child_of(p_next, p_nd);
+ PB_DS_ASSERT_NODE_CONSISTENT(p_nd, false)
+ return p_nd;
+}
+
+PB_DS_CLASS_T_DEC
+template<typename Pred>
+typename PB_DS_CLASS_C_DEC::size_type
+PB_DS_CLASS_C_DEC::
+erase_if(Pred pred)
+{
+ PB_DS_ASSERT_VALID((*this))
+ if (base_type::empty())
+ {
+ PB_DS_ASSERT_VALID((*this))
+ return 0;
+ }
+ base_type::to_linked_list();
+ node_pointer p_out = base_type::prune(pred);
+ size_type ersd = 0;
+ while (p_out != 0)
+ {
+ ++ersd;
+ node_pointer p_next = p_out->m_p_next_sibling;
+ base_type::actual_erase_node(p_out);
+ p_out = p_next;
+ }
+
+ node_pointer p_cur = base_type::m_p_root;
+ base_type::m_p_root = 0;
+ while (p_cur != 0)
+ {
+ node_pointer p_next = p_cur->m_p_next_sibling;
+ p_cur->m_p_l_child = p_cur->m_p_next_sibling = p_cur->m_p_prev_or_parent = 0;
+
+ push_imp(p_cur);
+ p_cur = p_next;
+ }
+ PB_DS_ASSERT_VALID((*this))
+ return ersd;
+}
+
projects / cross.git / blobdiff