libstdc++
list_update_map_/erase_fn_imps.hpp
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00001 // -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2009, 2010, 2011 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the terms
00007 // of the GNU General Public License as published by the Free Software
00008 // Foundation; either version 3, or (at your option) any later
00009 // version.
00010 
00011 // This library is distributed in the hope that it will be useful, but
00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // General Public License for more details.
00015 
00016 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
00026 
00027 // Permission to use, copy, modify, sell, and distribute this software
00028 // is hereby granted without fee, provided that the above copyright
00029 // notice appears in all copies, and that both that copyright notice
00030 // and this permission notice appear in supporting documentation. None
00031 // of the above authors, nor IBM Haifa Research Laboratories, make any
00032 // representation about the suitability of this software for any
00033 // purpose. It is provided "as is" without express or implied
00034 // warranty.
00035 
00036 /**
00037  * @file list_update_map_/erase_fn_imps.hpp
00038  * Contains implementations of lu_map_.
00039  */
00040 
00041 PB_DS_CLASS_T_DEC
00042 inline bool
00043 PB_DS_CLASS_C_DEC::
00044 erase(key_const_reference r_key)
00045 {
00046   PB_DS_ASSERT_VALID((*this))
00047   if (m_p_l == 0)
00048     return false;
00049 
00050   if (s_eq_fn(r_key, PB_DS_V2F(m_p_l->m_value)))
00051     {
00052       entry_pointer p_next = m_p_l->m_p_next;
00053       actual_erase_entry(m_p_l);
00054       m_p_l = p_next;
00055       return true;
00056     }
00057 
00058   entry_pointer p_l = m_p_l;
00059   while (p_l->m_p_next != 0)
00060     if (s_eq_fn(r_key, PB_DS_V2F(p_l->m_p_next->m_value)))
00061       {
00062     erase_next(p_l);
00063     return true;
00064       }
00065     else
00066       p_l = p_l->m_p_next;
00067   return false;
00068 }
00069 
00070 PB_DS_CLASS_T_DEC
00071 void
00072 PB_DS_CLASS_C_DEC::
00073 clear()
00074 {
00075   deallocate_all();
00076 }
00077 
00078 PB_DS_CLASS_T_DEC
00079 template<typename Pred>
00080 inline typename PB_DS_CLASS_C_DEC::size_type
00081 PB_DS_CLASS_C_DEC::
00082 erase_if(Pred pred)
00083 {
00084   PB_DS_ASSERT_VALID((*this))
00085   size_type num_ersd = 0;
00086   while (m_p_l != 0 && pred(m_p_l->m_value))
00087     {
00088       entry_pointer p_next = m_p_l->m_p_next;
00089       ++num_ersd;
00090       actual_erase_entry(m_p_l);
00091       m_p_l = p_next;
00092     }
00093 
00094   if (m_p_l == 0)
00095     return num_ersd;
00096 
00097   entry_pointer p_l = m_p_l;
00098   while (p_l->m_p_next != 0)
00099     {
00100       if (pred(p_l->m_p_next->m_value))
00101         {
00102       ++num_ersd;
00103       erase_next(p_l);
00104         }
00105       else
00106     p_l = p_l->m_p_next;
00107     }
00108 
00109   PB_DS_ASSERT_VALID((*this))
00110   return num_ersd;
00111 }
00112 
00113 PB_DS_CLASS_T_DEC
00114 void
00115 PB_DS_CLASS_C_DEC::
00116 erase_next(entry_pointer p_l)
00117 {
00118   _GLIBCXX_DEBUG_ASSERT(p_l != 0);
00119   _GLIBCXX_DEBUG_ASSERT(p_l->m_p_next != 0);
00120   entry_pointer p_next_l = p_l->m_p_next->m_p_next;
00121   actual_erase_entry(p_l->m_p_next);
00122   p_l->m_p_next = p_next_l;
00123 }
00124 
00125 PB_DS_CLASS_T_DEC
00126 void
00127 PB_DS_CLASS_C_DEC::
00128 actual_erase_entry(entry_pointer p_l)
00129 {
00130   _GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(p_l->m_value));)
00131   p_l->~entry();
00132   s_entry_allocator.deallocate(p_l, 1);
00133 }
00134