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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/trie_policy/order_statistics_imp.hpp | |
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Diffstat (limited to 'libstdc++-v3/include/ext/pb_ds/detail/trie_policy/order_statistics_imp.hpp')
-rw-r--r-- | libstdc++-v3/include/ext/pb_ds/detail/trie_policy/order_statistics_imp.hpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pb_ds/detail/trie_policy/order_statistics_imp.hpp b/libstdc++-v3/include/ext/pb_ds/detail/trie_policy/order_statistics_imp.hpp new file mode 100644 index 000000000..cb8e24741 --- /dev/null +++ b/libstdc++-v3/include/ext/pb_ds/detail/trie_policy/order_statistics_imp.hpp @@ -0,0 +1,181 @@ +// -*- 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 order_statistics_imp.hpp + * Contains forward declarations for order_statistics_key + */ + +PB_DS_CLASS_T_DEC +inline typename PB_DS_CLASS_C_DEC::iterator +PB_DS_CLASS_C_DEC:: +find_by_order(size_type order) +{ + if (empty()) + return (end()); + + ++order; + + node_iterator nd_it = node_begin(); + + while (true) + { + if (order > nd_it.get_metadata()) + return (++base_type::rightmost_it(nd_it)); + + const size_type num_children = nd_it.num_children(); + + if (num_children == 0) + return (*nd_it); + + for (size_type i = 0; i < num_children; ++i) + { + node_iterator child_nd_it = nd_it.get_child(i); + + if (order <= child_nd_it.get_metadata()) + { + i = num_children; + + nd_it = child_nd_it; + } + else + order -= child_nd_it.get_metadata(); + } + } +} + +PB_DS_CLASS_T_DEC +inline typename PB_DS_CLASS_C_DEC::const_iterator +PB_DS_CLASS_C_DEC:: +find_by_order(size_type order) const +{ + return (const_cast<PB_DS_CLASS_C_DEC* >(this)->find_by_order(order)); +} + +PB_DS_CLASS_T_DEC +inline typename PB_DS_CLASS_C_DEC::size_type +PB_DS_CLASS_C_DEC:: +order_of_key(const_key_reference r_key) const +{ + const E_Access_Traits& r_traits = + const_cast<PB_DS_CLASS_C_DEC* >(this)->get_e_access_traits(); + + return (order_of_prefix( + r_traits.begin(r_key), + r_traits.end(r_key))); +} + +PB_DS_CLASS_T_DEC +inline typename PB_DS_CLASS_C_DEC::size_type +PB_DS_CLASS_C_DEC:: +order_of_prefix(typename e_access_traits::const_iterator b, typename e_access_traits::const_iterator e) const +{ + if (empty()) + return (0); + + const E_Access_Traits& r_traits = + const_cast<PB_DS_CLASS_C_DEC* >(this)->get_e_access_traits(); + + const_node_iterator nd_it = node_begin(); + + const_node_iterator end_nd_it = node_end(); + + size_type ord = 0; + + while (true) + { + const size_type num_children = nd_it.num_children(); + + if (num_children == 0) + { + const_key_reference r_key = + base_type::extract_key(*(*nd_it)); + + typename e_access_traits::const_iterator key_b = + r_traits.begin(r_key); + + typename e_access_traits::const_iterator key_e = + r_traits.end(r_key); + + return ((base_type::less( key_b, key_e, b, e, r_traits))? + ord + 1 : + ord); + } + + const_node_iterator next_nd_it = end_nd_it; + + size_type i = num_children - 1; + + do + { + const_node_iterator child_nd_it = nd_it.get_child(i); + + if (next_nd_it != end_nd_it) + ord += child_nd_it.get_metadata(); + else if (!base_type::less( + b, e, + child_nd_it.valid_prefix().first, + child_nd_it.valid_prefix().second, + r_traits)) + next_nd_it = child_nd_it; + } + while (i-- > 0); + + if (next_nd_it == end_nd_it) + return (ord); + + nd_it = next_nd_it; + } +} + +PB_DS_CLASS_T_DEC +inline void +PB_DS_CLASS_C_DEC:: +operator()(node_iterator nd_it, const_node_iterator /*end_nd_it*/) const +{ + const size_type num_children = nd_it.num_children(); + + size_type children_rank = 0; + + for (size_type i = 0; i < num_children; ++i) + children_rank += nd_it.get_child(i).get_metadata(); + + const_cast<size_type& >(nd_it.get_metadata()) =(num_children == 0)? 1 : children_rank; +} + +PB_DS_CLASS_T_DEC +PB_DS_CLASS_C_DEC:: +~trie_order_statistics_node_update() +{ } |