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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp | |
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Diffstat (limited to 'libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp')
-rw-r--r-- | libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp new file mode 100644 index 000000000..f9bae2263 --- /dev/null +++ b/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/splay_fn_imps.hpp @@ -0,0 +1,283 @@ +// -*- C++ -*- + +// Copyright (C) 2005, 2006, 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 +// <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 != 0) + p_b->m_p_parent = p_parent; + + p_grandparent->m_p_right = p_c; + if (p_c != 0) + 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 != 0) + p_b->m_p_parent = p_parent; + + p_grandparent->m_p_left = p_c; + if (p_c != 0) + 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 != 0) + p_b->m_p_parent = p_parent; + + p_grandparent->m_p_left = p_c; + if (p_c != 0) + 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 != 0) + p_b->m_p_parent = p_parent; + + p_grandparent->m_p_right = p_c; + if (p_c != 0) + 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 != 0); + _GLIBCXX_DEBUG_ASSERT(p_parent != 0); + _GLIBCXX_DEBUG_ASSERT(p_grandparent != 0); + + 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);) +} + |