--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009 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 splay_fn_imps.hpp
+ * Contains an implementation class for splay_tree_.
+ */
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+splay(node_pointer p_nd)
+{
+ while (p_nd->m_p_parent != base_type::m_p_head)
+ {
+#ifdef _GLIBCXX_DEBUG
+ {
+ node_pointer p_head = base_type::m_p_head;
+ assert_special_imp(p_head);
+ }
+#endif
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_nd);)
+
+ if (p_nd->m_p_parent->m_p_parent == base_type::m_p_head)
+ {
+ base_type::rotate_parent(p_nd);
+ _GLIBCXX_DEBUG_ASSERT(p_nd == this->m_p_head->m_p_parent);
+ }
+ else
+ {
+ const node_pointer p_parent = p_nd->m_p_parent;
+ const node_pointer p_grandparent = p_parent->m_p_parent;
+
+#ifdef _GLIBCXX_DEBUG
+ const size_type total =
+ base_type::recursive_count(p_grandparent);
+ _GLIBCXX_DEBUG_ASSERT(total >= 3);
+#endif
+
+ if (p_parent->m_p_left == p_nd &&
+ p_grandparent->m_p_right == p_parent)
+ splay_zig_zag_left(p_nd, p_parent, p_grandparent);
+ else if (p_parent->m_p_right == p_nd &&
+ p_grandparent->m_p_left == p_parent)
+ splay_zig_zag_right(p_nd, p_parent, p_grandparent);
+ else if (p_parent->m_p_left == p_nd &&
+ p_grandparent->m_p_left == p_parent)
+ splay_zig_zig_left(p_nd, p_parent, p_grandparent);
+ else
+ splay_zig_zig_right(p_nd, p_parent, p_grandparent);
+ _GLIBCXX_DEBUG_ASSERT(total ==this->recursive_count(p_nd));
+ }
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_nd);)
+ }
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zig_zag_left(node_pointer p_nd, node_pointer p_parent,
+ node_pointer p_grandparent)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent);
+ _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent);
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_grandparent);)
+
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_left == p_nd &&
+ p_grandparent->m_p_right == p_parent);
+
+ splay_zz_start(p_nd, p_parent, p_grandparent);
+
+ node_pointer p_b = p_nd->m_p_right;
+ node_pointer p_c = p_nd->m_p_left;
+
+ p_nd->m_p_right = p_parent;
+ p_parent->m_p_parent = p_nd;
+
+ p_nd->m_p_left = p_grandparent;
+ p_grandparent->m_p_parent = p_nd;
+
+ p_parent->m_p_left = p_b;
+ if (p_b != NULL)
+ p_b->m_p_parent = p_parent;
+
+ p_grandparent->m_p_right = p_c;
+ if (p_c != NULL)
+ p_c->m_p_parent = p_grandparent;
+
+ splay_zz_end(p_nd, p_parent, p_grandparent);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zig_zag_right(node_pointer p_nd, node_pointer p_parent,
+ node_pointer p_grandparent)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent);
+ _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent);
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_grandparent);)
+
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_right == p_nd &&
+ p_grandparent->m_p_left == p_parent);
+
+ splay_zz_start(p_nd, p_parent, p_grandparent);
+
+ node_pointer p_b = p_nd->m_p_left;
+ node_pointer p_c = p_nd->m_p_right;
+
+ p_nd->m_p_left = p_parent;
+ p_parent->m_p_parent = p_nd;
+
+ p_nd->m_p_right = p_grandparent;
+ p_grandparent->m_p_parent = p_nd;
+
+ p_parent->m_p_right = p_b;
+ if (p_b != NULL)
+ p_b->m_p_parent = p_parent;
+
+ p_grandparent->m_p_left = p_c;
+ if (p_c != NULL)
+ p_c->m_p_parent = p_grandparent;
+
+ splay_zz_end(p_nd, p_parent, p_grandparent);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zig_zig_left(node_pointer p_nd, node_pointer p_parent,
+ node_pointer p_grandparent)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent);
+ _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent);
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_grandparent);)
+
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_left == p_nd &&
+ p_nd->m_p_parent->m_p_parent->m_p_left == p_nd->m_p_parent);
+
+ splay_zz_start(p_nd, p_parent, p_grandparent);
+
+ node_pointer p_b = p_nd->m_p_right;
+ node_pointer p_c = p_parent->m_p_right;
+
+ p_nd->m_p_right = p_parent;
+ p_parent->m_p_parent = p_nd;
+
+ p_parent->m_p_right = p_grandparent;
+ p_grandparent->m_p_parent = p_parent;
+
+ p_parent->m_p_left = p_b;
+ if (p_b != NULL)
+ p_b->m_p_parent = p_parent;
+
+ p_grandparent->m_p_left = p_c;
+ if (p_c != NULL)
+ p_c->m_p_parent = p_grandparent;
+
+ splay_zz_end(p_nd, p_parent, p_grandparent);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zig_zig_right(node_pointer p_nd, node_pointer p_parent,
+ node_pointer p_grandparent)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent);
+ _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent);
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_grandparent);)
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_right == p_nd &&
+ p_nd->m_p_parent->m_p_parent->m_p_right == p_nd->m_p_parent);
+
+ splay_zz_start(p_nd, p_parent, p_grandparent);
+
+ node_pointer p_b = p_nd->m_p_left;
+ node_pointer p_c = p_parent->m_p_left;
+
+ p_nd->m_p_left = p_parent;
+ p_parent->m_p_parent = p_nd;
+
+ p_parent->m_p_left = p_grandparent;
+ p_grandparent->m_p_parent = p_parent;
+
+ p_parent->m_p_right = p_b;
+ if (p_b != NULL)
+ p_b->m_p_parent = p_parent;
+
+ p_grandparent->m_p_right = p_c;
+ if (p_c != NULL)
+ p_c->m_p_parent = p_grandparent;
+
+ base_type::update_to_top(p_grandparent, (node_update* )this);
+ splay_zz_end(p_nd, p_parent, p_grandparent);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zz_start(node_pointer p_nd,
+#ifdef _GLIBCXX_DEBUG
+ node_pointer p_parent,
+#else
+ node_pointer /*p_parent*/,
+#endif
+ node_pointer p_grandparent)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_nd != NULL);
+ _GLIBCXX_DEBUG_ASSERT(p_parent != NULL);
+ _GLIBCXX_DEBUG_ASSERT(p_grandparent != NULL);
+
+ const bool grandparent_head = p_grandparent->m_p_parent == base_type::m_p_head;
+
+ if (grandparent_head)
+ {
+ base_type::m_p_head->m_p_parent = base_type::m_p_head->m_p_parent;
+ p_nd->m_p_parent = base_type::m_p_head;
+ return;
+ }
+
+ node_pointer p_greatgrandparent = p_grandparent->m_p_parent;
+
+ p_nd->m_p_parent = p_greatgrandparent;
+
+ if (p_grandparent == p_greatgrandparent->m_p_left)
+ p_greatgrandparent->m_p_left = p_nd;
+ else
+ p_greatgrandparent->m_p_right = p_nd;
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+splay_zz_end(node_pointer p_nd, node_pointer p_parent,
+ node_pointer p_grandparent)
+{
+ if (p_nd->m_p_parent == base_type::m_p_head)
+ base_type::m_p_head->m_p_parent = p_nd;
+
+ apply_update(p_grandparent, (node_update* )this);
+ apply_update(p_parent, (node_update* )this);
+ apply_update(p_nd, (node_update* )this);
+
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(p_nd);)
+}
+
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