--- /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 split_join_fn_imps.hpp
+ * Contains an implementation for rb_tree_.
+ */
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+join(PB_DS_CLASS_C_DEC& other)
+{
+ _GLIBCXX_DEBUG_ONLY(assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.base_type::assert_valid();)
+ if (base_type::join_prep(other) == false)
+ {
+ _GLIBCXX_DEBUG_ONLY(assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
+ return;
+ }
+
+ const node_pointer p_x = other.split_min();
+ join_imp(p_x, other.m_p_head->m_p_parent);
+ base_type::join_finish(other);
+ _GLIBCXX_DEBUG_ONLY(assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.base_type::assert_valid();)
+ }
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+join_imp(node_pointer p_x, node_pointer p_r)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_x != NULL);
+ if (p_r != NULL)
+ p_r->m_red = false;
+
+ const size_type h = black_height(base_type::m_p_head->m_p_parent);
+ const size_type other_h = black_height(p_r);
+ node_pointer p_x_l;
+ node_pointer p_x_r;
+ std::pair<node_pointer, node_pointer> join_pos;
+ const bool right_join = h >= other_h;
+ if (right_join)
+ {
+ join_pos = find_join_pos_right(base_type::m_p_head->m_p_parent,
+ h, other_h);
+ p_x_l = join_pos.first;
+ p_x_r = p_r;
+ }
+ else
+ {
+ p_x_l = base_type::m_p_head->m_p_parent;
+ base_type::m_p_head->m_p_parent = p_r;
+ if (p_r != NULL)
+ p_r->m_p_parent = base_type::m_p_head;
+
+ join_pos = find_join_pos_left(base_type::m_p_head->m_p_parent,
+ h, other_h);
+ p_x_r = join_pos.first;
+ }
+
+ node_pointer p_parent = join_pos.second;
+ if (p_parent == base_type::m_p_head)
+ {
+ base_type::m_p_head->m_p_parent = p_x;
+ p_x->m_p_parent = base_type::m_p_head;
+ }
+ else
+ {
+ p_x->m_p_parent = p_parent;
+ if (right_join)
+ p_x->m_p_parent->m_p_right = p_x;
+ else
+ p_x->m_p_parent->m_p_left = p_x;
+ }
+
+ p_x->m_p_left = p_x_l;
+ if (p_x_l != NULL)
+ p_x_l->m_p_parent = p_x;
+
+ p_x->m_p_right = p_x_r;
+ if (p_x_r != NULL)
+ p_x_r->m_p_parent = p_x;
+
+ p_x->m_red = true;
+
+ base_type::initialize_min_max();
+ _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid();)
+ base_type::update_to_top(p_x, (node_update* )this);
+ insert_fixup(p_x);
+ _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid());
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::node_pointer
+PB_DS_CLASS_C_DEC::
+split_min()
+{
+ node_pointer p_min = base_type::m_p_head->m_p_left;
+
+#ifdef _GLIBCXX_DEBUG
+ const node_pointer p_head = base_type::m_p_head;
+ _GLIBCXX_DEBUG_ASSERT(p_min != p_head);
+#endif
+
+ remove_node(p_min);
+ return p_min;
+}
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::node_pointer,
+ typename PB_DS_CLASS_C_DEC::node_pointer>
+PB_DS_CLASS_C_DEC::
+find_join_pos_right(node_pointer p_l, size_type h_l, size_type h_r)
+{
+ _GLIBCXX_DEBUG_ASSERT(h_l >= h_r);
+
+ if (base_type::m_p_head->m_p_parent == NULL)
+ return (std::make_pair((node_pointer)NULL, base_type::m_p_head));
+
+ node_pointer p_l_parent = base_type::m_p_head;
+ while (h_l > h_r)
+ {
+ if (p_l->m_red == false)
+ {
+ _GLIBCXX_DEBUG_ASSERT(h_l > 0);
+ --h_l;
+ }
+
+ p_l_parent = p_l;
+ p_l = p_l->m_p_right;
+ }
+
+ if (!is_effectively_black(p_l))
+ {
+ p_l_parent = p_l;
+ p_l = p_l->m_p_right;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(is_effectively_black(p_l));
+ _GLIBCXX_DEBUG_ASSERT(black_height(p_l) == h_r);
+ _GLIBCXX_DEBUG_ASSERT(p_l == NULL || p_l->m_p_parent == p_l_parent);
+ return std::make_pair(p_l, p_l_parent);
+}
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::node_pointer,
+ typename PB_DS_CLASS_C_DEC::node_pointer>
+PB_DS_CLASS_C_DEC::
+find_join_pos_left(node_pointer p_r, size_type h_l, size_type h_r)
+{
+ _GLIBCXX_DEBUG_ASSERT(h_r > h_l);
+ if (base_type::m_p_head->m_p_parent == NULL)
+ return (std::make_pair((node_pointer)NULL,
+ base_type::m_p_head));
+ node_pointer p_r_parent = base_type::m_p_head;
+ while (h_r > h_l)
+ {
+ if (p_r->m_red == false)
+ {
+ _GLIBCXX_DEBUG_ASSERT(h_r > 0);
+ --h_r;
+ }
+
+ p_r_parent = p_r;
+ p_r = p_r->m_p_left;
+ }
+
+ if (!is_effectively_black(p_r))
+ {
+ p_r_parent = p_r;
+ p_r = p_r->m_p_left;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(is_effectively_black(p_r));
+ _GLIBCXX_DEBUG_ASSERT(black_height(p_r) == h_l);
+ _GLIBCXX_DEBUG_ASSERT(p_r == NULL || p_r->m_p_parent == p_r_parent);
+ return std::make_pair(p_r, p_r_parent);
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::size_type
+PB_DS_CLASS_C_DEC::
+black_height(node_pointer p_nd)
+{
+ size_type h = 1;
+ while (p_nd != NULL)
+ {
+ if (p_nd->m_red == false)
+ ++h;
+ p_nd = p_nd->m_p_left;
+ }
+ return h;
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other)
+{
+ _GLIBCXX_DEBUG_ONLY(assert_valid());
+ _GLIBCXX_DEBUG_ONLY(base_type::assert_valid();)
+
+ _GLIBCXX_DEBUG_ONLY(other.assert_valid());
+ _GLIBCXX_DEBUG_ONLY(other.base_type::assert_valid();)
+
+ if (base_type::split_prep(r_key, other) == false)
+ {
+ _GLIBCXX_DEBUG_ONLY(assert_valid());
+ _GLIBCXX_DEBUG_ONLY(other.assert_valid());
+ return;
+ }
+
+ _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.base_type::structure_only_assert_valid();)
+ node_pointer p_nd = upper_bound(r_key).m_p_nd;
+ do
+ {
+ node_pointer p_next_nd = p_nd->m_p_parent;
+ if (Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
+ split_at_node(p_nd, other);
+
+ _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(other.base_type::structure_only_assert_valid();)
+ p_nd = p_next_nd;
+ }
+ while (p_nd != base_type::m_p_head);
+
+ base_type::split_finish(other);
+ _GLIBCXX_DEBUG_ONLY(assert_valid();)
+ _GLIBCXX_DEBUG_ONLY(assert_valid();)
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+split_at_node(node_pointer p_nd, PB_DS_CLASS_C_DEC& other)
+{
+ _GLIBCXX_DEBUG_ASSERT(p_nd != NULL);
+
+ node_pointer p_l = p_nd->m_p_left;
+ node_pointer p_r = p_nd->m_p_right;
+ node_pointer p_parent = p_nd->m_p_parent;
+ if (p_parent == base_type::m_p_head)
+ {
+ base_type::m_p_head->m_p_parent = p_l;
+ if (p_l != NULL)
+ {
+ p_l->m_p_parent = base_type::m_p_head;
+ p_l->m_red = false;
+ }
+ }
+ else
+ {
+ if (p_parent->m_p_left == p_nd)
+ p_parent->m_p_left = p_l;
+ else
+ p_parent->m_p_right = p_l;
+
+ if (p_l != NULL)
+ p_l->m_p_parent = p_parent;
+
+ update_to_top(p_parent, (node_update* )this);
+
+ if (!p_nd->m_red)
+ remove_fixup(p_l, p_parent);
+ }
+
+ base_type::initialize_min_max();
+ other.join_imp(p_nd, p_r);
+ _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid());
+ _GLIBCXX_DEBUG_ONLY(other.base_type::structure_only_assert_valid());
+}
+
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