insert_no_store_hash_fn_imps.hpp revision 225736
1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the terms 7// of the GNU General Public License as published by the Free Software 8// Foundation; either version 2, or (at your option) any later 9// version. 10 11// This library is distributed in the hope that it will be useful, but 12// WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14// General Public License for more details. 15 16// You should have received a copy of the GNU General Public License 17// along with this library; see the file COPYING. If not, write to 18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19// MA 02111-1307, USA. 20 21// As a special exception, you may use this file as part of a free 22// software library without restriction. Specifically, if other files 23// instantiate templates or use macros or inline functions from this 24// file, or you compile this file and link it with other files to 25// produce an executable, this file does not by itself cause the 26// resulting executable to be covered by the GNU General Public 27// License. This exception does not however invalidate any other 28// reasons why the executable file might be covered by the GNU General 29// Public License. 30 31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33// Permission to use, copy, modify, sell, and distribute this software 34// is hereby granted without fee, provided that the above copyright 35// notice appears in all copies, and that both that copyright notice 36// and this permission notice appear in supporting documentation. None 37// of the above authors, nor IBM Haifa Research Laboratories, make any 38// representation about the suitability of this software for any 39// purpose. It is provided "as is" without express or implied 40// warranty. 41 42/** 43 * @file insert_no_store_hash_fn_imps.hpp 44 * Contains implementations of gp_ht_map_'s insert related functions, 45 * when the hash value is not stored. 46 */ 47 48PB_DS_CLASS_T_DEC 49inline typename PB_DS_CLASS_C_DEC::size_type 50PB_DS_CLASS_C_DEC:: 51find_ins_pos(const_key_reference r_key, false_type) 52{ 53 size_type hash = ranged_probe_fn_base::operator()(r_key); 54 size_type i; 55 56 /* The insertion position is initted to a non-legal value to indicate 57 * that it has not been initted yet. 58 */ 59 size_type ins_pos = m_num_e; 60 resize_base::notify_insert_search_start(); 61 for (i = 0; i < m_num_e; ++i) 62 { 63 const size_type pos = ranged_probe_fn_base::operator()(r_key, hash, i); 64 _GLIBCXX_DEBUG_ASSERT(pos < m_num_e); 65 entry* const p_e = m_entries + pos; 66 switch(p_e->m_stat) 67 { 68 case empty_entry_status: 69 { 70 resize_base::notify_insert_search_end(); 71 _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key);) 72 return (ins_pos == m_num_e) ? pos : ins_pos; 73 } 74 break; 75 case erased_entry_status: 76 if (ins_pos == m_num_e) 77 ins_pos = pos; 78 break; 79 case valid_entry_status: 80 if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key)) 81 { 82 resize_base::notify_insert_search_end(); 83 _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);) 84 return pos; 85 } 86 break; 87 default: 88 _GLIBCXX_DEBUG_ASSERT(0); 89 }; 90 91 resize_base::notify_insert_search_collision(); 92 } 93 resize_base::notify_insert_search_end(); 94 if (ins_pos == m_num_e) 95 __throw_insert_error(); 96 return ins_pos; 97} 98 99PB_DS_CLASS_T_DEC 100inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool> 101PB_DS_CLASS_C_DEC:: 102insert_imp(const_reference r_val, false_type) 103{ 104 const_key_reference r_key = PB_DS_V2F(r_val); 105 const size_type pos = find_ins_pos(r_key, 106 traits_base::m_store_extra_indicator); 107 108 if (m_entries[pos].m_stat == valid_entry_status) 109 { 110 _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);) 111 return std::make_pair(&(m_entries + pos)->m_value, false); 112 } 113 114 _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key)); 115 return std::make_pair(insert_new_imp(r_val, pos), true); 116} 117 118