| // -*- C++ -*- |
| |
| // Copyright (C) 2005-2014 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 pat_trie_/synth_access_traits.hpp |
| * Contains an implementation class for a patricia tree. |
| */ |
| |
| #ifndef PB_DS_SYNTH_E_ACCESS_TRAITS_HPP |
| #define PB_DS_SYNTH_E_ACCESS_TRAITS_HPP |
| |
| #include <ext/pb_ds/detail/type_utils.hpp> |
| |
| namespace __gnu_pbds |
| { |
| namespace detail |
| { |
| |
| #define PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC \ |
| template<typename Type_Traits, bool Set, typename _ATraits> |
| |
| #define PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC \ |
| synth_access_traits<Type_Traits, Set, _ATraits> |
| |
| /// Synthetic element access traits. |
| template<typename Type_Traits, bool Set, typename _ATraits> |
| struct synth_access_traits : public _ATraits |
| { |
| typedef _ATraits base_type; |
| typedef typename base_type::const_iterator const_iterator; |
| typedef Type_Traits type_traits; |
| typedef typename type_traits::const_reference const_reference; |
| typedef typename type_traits::key_const_reference key_const_reference; |
| |
| synth_access_traits(); |
| |
| synth_access_traits(const base_type&); |
| |
| inline bool |
| equal_prefixes(const_iterator, const_iterator, const_iterator, |
| const_iterator, bool compare_after = true) const; |
| |
| bool |
| equal_keys(key_const_reference, key_const_reference) const; |
| |
| bool |
| cmp_prefixes(const_iterator, const_iterator, const_iterator, |
| const_iterator, bool compare_after = false) const; |
| |
| bool |
| cmp_keys(key_const_reference, key_const_reference) const; |
| |
| inline static key_const_reference |
| extract_key(const_reference); |
| |
| #ifdef _GLIBCXX_DEBUG |
| bool |
| operator()(key_const_reference, key_const_reference); |
| #endif |
| |
| private: |
| inline static key_const_reference |
| extract_key(const_reference, true_type); |
| |
| inline static key_const_reference |
| extract_key(const_reference, false_type); |
| |
| static integral_constant<int, Set> s_set_ind; |
| }; |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| integral_constant<int,Set> |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::s_set_ind; |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| synth_access_traits() |
| { } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| synth_access_traits(const _ATraits& r_traits) |
| : _ATraits(r_traits) |
| { } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| inline bool |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| equal_prefixes(const_iterator b_l, const_iterator e_l, const_iterator b_r, |
| const_iterator e_r, bool compare_after /*= false */) const |
| { |
| while (b_l != e_l) |
| { |
| if (b_r == e_r) |
| return false; |
| if (base_type::e_pos(*b_l) != base_type::e_pos(*b_r)) |
| return false; |
| ++b_l; |
| ++b_r; |
| } |
| return (!compare_after || b_r == e_r); |
| } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| bool |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| equal_keys(key_const_reference r_lhs_key, |
| key_const_reference r_rhs_key) const |
| { |
| return equal_prefixes(base_type::begin(r_lhs_key), |
| base_type::end(r_lhs_key), |
| base_type::begin(r_rhs_key), |
| base_type::end(r_rhs_key), |
| true); |
| } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| bool |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| cmp_prefixes(const_iterator b_l, const_iterator e_l, const_iterator b_r, |
| const_iterator e_r, bool compare_after /* = false*/) const |
| { |
| while (b_l != e_l) |
| { |
| if (b_r == e_r) |
| return false; |
| |
| const typename base_type::size_type l_pos = base_type::e_pos(*b_l); |
| const typename base_type::size_type r_pos = base_type::e_pos(*b_r); |
| if (l_pos != r_pos) |
| return l_pos < r_pos; |
| ++b_l; |
| ++b_r; |
| } |
| |
| if (!compare_after) |
| return false; |
| return b_r != e_r; |
| } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| bool |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| cmp_keys(key_const_reference r_lhs_key, |
| key_const_reference r_rhs_key) const |
| { |
| return cmp_prefixes(base_type::begin(r_lhs_key), |
| base_type::end(r_lhs_key), |
| base_type::begin(r_rhs_key), |
| base_type::end(r_rhs_key), |
| true); |
| } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| extract_key(const_reference r_val) |
| { return extract_key(r_val, s_set_ind); } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| extract_key(const_reference r_val, true_type) |
| { return r_val; } |
| |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| extract_key(const_reference r_val, false_type) |
| { return r_val.first; } |
| |
| #ifdef _GLIBCXX_DEBUG |
| PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| bool |
| PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: |
| operator()(key_const_reference r_lhs, key_const_reference r_rhs) |
| { return cmp_keys(r_lhs, r_rhs); } |
| #endif |
| |
| #undef PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC |
| #undef PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC |
| |
| } // namespace detail |
| } // namespace __gnu_pbds |
| |
| #endif |