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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp b/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp new file mode 100644 index 000000000..68fedc0eb --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp @@ -0,0 +1,292 @@ +// -*- C++ -*- + +// Copyright (C) 2005, 2006, 2007, 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 node_iterators.hpp + * Contains an implementation class for ov_tree_. + */ + +#ifndef PB_DS_OV_TREE_NODE_ITERATORS_HPP +#define PB_DS_OV_TREE_NODE_ITERATORS_HPP + +#include <ext/pb_ds/tag_and_trait.hpp> +#include <ext/pb_ds/detail/type_utils.hpp> +#include <debug/debug.h> + +namespace __gnu_pbds +{ + namespace detail + { + +#define PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC \ + ov_tree_node_const_it_<Value_Type, Metadata_Type, Allocator> + + // Const node reference. + template<typename Value_Type, typename Metadata_Type, class Allocator> + class ov_tree_node_const_it_ + { + + protected: + typedef + typename Allocator::template rebind< + Value_Type>::other::pointer + pointer; + + typedef + typename Allocator::template rebind< + Value_Type>::other::const_pointer + const_pointer; + + typedef + typename Allocator::template rebind< + Metadata_Type>::other::const_pointer + const_metadata_pointer; + + typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC this_type; + + protected: + + template<typename Ptr> + inline static Ptr + mid_pointer(Ptr p_begin, Ptr p_end) + { + _GLIBCXX_DEBUG_ASSERT(p_end >= p_begin); + return (p_begin + (p_end - p_begin) / 2); + } + + public: + + typedef trivial_iterator_tag iterator_category; + + typedef trivial_iterator_difference_type difference_type; + + typedef + typename Allocator::template rebind< + Value_Type>::other::const_pointer + value_type; + + typedef + typename Allocator::template rebind< + typename remove_const< + Value_Type>::type>::other::const_pointer + reference; + + typedef + typename Allocator::template rebind< + typename remove_const< + Value_Type>::type>::other::const_pointer + const_reference; + + typedef Metadata_Type metadata_type; + + typedef + typename Allocator::template rebind< + metadata_type>::other::const_reference + const_metadata_reference; + + public: + inline + ov_tree_node_const_it_(const_pointer p_nd = NULL, const_pointer p_begin_nd = NULL, const_pointer p_end_nd = NULL, const_metadata_pointer p_metadata = NULL) : m_p_value(const_cast<pointer>(p_nd)), m_p_begin_value(const_cast<pointer>(p_begin_nd)), m_p_end_value(const_cast<pointer>(p_end_nd)), m_p_metadata(p_metadata) + { } + + inline const_reference + operator*() const + { return m_p_value; } + + inline const_metadata_reference + get_metadata() const + { + enum + { + has_metadata = !is_same<Metadata_Type, null_node_metadata>::value + }; + + PB_DS_STATIC_ASSERT(should_have_metadata, has_metadata); + _GLIBCXX_DEBUG_ASSERT(m_p_metadata != NULL); + return *m_p_metadata; + } + + inline this_type + get_l_child() const + { + if (m_p_begin_value == m_p_value) + return (this_type(m_p_begin_value, m_p_begin_value, m_p_begin_value)); + + const_metadata_pointer p_begin_metadata = + m_p_metadata - (m_p_value - m_p_begin_value); + + return (this_type(mid_pointer(m_p_begin_value, m_p_value), + m_p_begin_value, + m_p_value, + mid_pointer(p_begin_metadata, m_p_metadata))); + } + + inline this_type + get_r_child() const + { + if (m_p_value == m_p_end_value) + return (this_type(m_p_end_value, m_p_end_value, m_p_end_value)); + + const_metadata_pointer p_end_metadata = + m_p_metadata + (m_p_end_value - m_p_value); + + return (this_type(mid_pointer(m_p_value + 1, m_p_end_value), + m_p_value + 1, + m_p_end_value,(m_p_metadata == NULL) ? + NULL : mid_pointer(m_p_metadata + 1, p_end_metadata))); + } + + inline bool + operator==(const this_type& other) const + { + const bool is_end = m_p_begin_value == m_p_end_value; + const bool is_other_end = other.m_p_begin_value == other.m_p_end_value; + + if (is_end) + return (is_other_end); + + if (is_other_end) + return (is_end); + + return m_p_value == other.m_p_value; + } + + inline bool + operator!=(const this_type& other) const + { return !operator==(other); } + + public: + pointer m_p_value; + pointer m_p_begin_value; + pointer m_p_end_value; + + const_metadata_pointer m_p_metadata; + }; + +#define PB_DS_OV_TREE_NODE_ITERATOR_C_DEC \ + ov_tree_node_it_<Value_Type, Metadata_Type, Allocator> + + // Node reference. + template<typename Value_Type, typename Metadata_Type, class Allocator> + class ov_tree_node_it_ : public PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC + { + + private: + typedef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC this_type; + + typedef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC base_type; + + typedef typename base_type::pointer pointer; + + typedef typename base_type::const_pointer const_pointer; + + typedef + typename base_type::const_metadata_pointer + const_metadata_pointer; + + public: + + typedef trivial_iterator_tag iterator_category; + + typedef trivial_iterator_difference_type difference_type; + + typedef + typename Allocator::template rebind< + Value_Type>::other::pointer + value_type; + + typedef + typename Allocator::template rebind< + typename remove_const< + Value_Type>::type>::other::pointer + reference; + + typedef + typename Allocator::template rebind< + typename remove_const< + Value_Type>::type>::other::pointer + const_reference; + + public: + inline + ov_tree_node_it_(const_pointer p_nd = NULL, const_pointer p_begin_nd = NULL, const_pointer p_end_nd = NULL, const_metadata_pointer p_metadata = NULL) : base_type(p_nd, p_begin_nd, p_end_nd, p_metadata) + { } + + // Access. + inline reference + operator*() const + { return reference(base_type::m_p_value); } + + // Returns the node reference associated with the left node. + inline ov_tree_node_it_ + get_l_child() const + { + if (base_type::m_p_begin_value == base_type::m_p_value) + return (this_type(base_type::m_p_begin_value, base_type::m_p_begin_value, base_type::m_p_begin_value)); + + const_metadata_pointer p_begin_metadata = + base_type::m_p_metadata - (base_type::m_p_value - base_type::m_p_begin_value); + + return (this_type(base_type::mid_pointer(base_type::m_p_begin_value, base_type::m_p_value), + base_type::m_p_begin_value, + base_type::m_p_value, + base_type::mid_pointer(p_begin_metadata, base_type::m_p_metadata))); + } + + // Returns the node reference associated with the right node. + inline ov_tree_node_it_ + get_r_child() const + { + if (base_type::m_p_value == base_type::m_p_end_value) + return (this_type(base_type::m_p_end_value, base_type::m_p_end_value, base_type::m_p_end_value)); + + const_metadata_pointer p_end_metadata = + base_type::m_p_metadata + (base_type::m_p_end_value - base_type::m_p_value); + + return (this_type(base_type::mid_pointer(base_type::m_p_value + 1, base_type::m_p_end_value), + base_type::m_p_value + 1, + base_type::m_p_end_value,(base_type::m_p_metadata == NULL)? + NULL : base_type::mid_pointer(base_type::m_p_metadata + 1, p_end_metadata))); + } + + }; + +#undef PB_DS_OV_TREE_NODE_ITERATOR_C_DEC +#undef PB_DS_OV_TREE_CONST_NODE_ITERATOR_C_DEC + +} // namespace detail +} // namespace __gnu_pbds + +#endif |