release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/pb_ds/detail/hash_fn/ranged_probe_fn.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  26
  27 // Permission to use, copy, modify, sell, and distribute this software
  28 // is hereby granted without fee, provided that the above copyright
  29 // notice appears in all copies, and that both that copyright notice
  30 // and this permission notice appear in supporting documentation. None
  31 // of the above authors, nor IBM Haifa Research Laboratories, make any
  32 // representation about the suitability of this software for any
  33 // purpose. It is provided "as is" without express or implied
  34 // warranty.
  35
  36 /**
  37  * @file ranged_probe_fn.hpp
  38  * Contains a unified ranged probe functor, allowing the probe tables to deal with
  39  *    a single class for ranged probeing.
  40  */
  41
  42 #ifndef PB_DS_RANGED_PROBE_FN_HPP
  43 #define PB_DS_RANGED_PROBE_FN_HPP
  44
  45 #include <ext/pb_ds/detail/basic_types.hpp>
  46 #include <utility>
  47 #include <debug/debug.h>
  48
  49 namespace __gnu_pbds
  50 {
  51   namespace detail
  52   {
  53     template<typename Key, typename Hash_Fn, typename Allocator,
  54              typename Comb_Probe_Fn, typename Probe_Fn, bool Store_Hash>
  55     class ranged_probe_fn;
  56
  57 #define PB_DS_CLASS_T_DEC \
  58     template<typename Key, typename Hash_Fn, typename Allocator, \
  59              typename Comb_Probe_Fn, typename Probe_Fn>
  60
  61 #define PB_DS_CLASS_C_DEC \
  62     ranged_probe_fn<Key, Hash_Fn, Allocator, Comb_Probe_Fn, Probe_Fn, false>
  63
  64     /**
  65      * Specialization 1
  66      * The client supplies a probe function and a ranged probe
  67      * function, and requests that hash values not be stored.
  68      **/
  69     template<typename Key, typename Hash_Fn, typename Allocator,
  70              typename Comb_Probe_Fn, typename Probe_Fn>
  71     class ranged_probe_fn<Key, Hash_Fn, Allocator, Comb_Probe_Fn,
  72                           Probe_Fn, false>
  73     : public Hash_Fn, public Comb_Probe_Fn, public Probe_Fn
  74     {
  75     protected:
  76       typedef typename Allocator::size_type size_type;
  77       typedef Comb_Probe_Fn comb_probe_fn_base;
  78       typedef Hash_Fn hash_fn_base;
  79       typedef Probe_Fn probe_fn_base;
  80       typedef typename Allocator::template rebind<Key>::other key_allocator;
  81       typedef typename key_allocator::const_reference const_key_reference;
  82
  83       ranged_probe_fn(size_type);
  84
  85       ranged_probe_fn(size_type, const Hash_Fn&);
  86
  87       ranged_probe_fn(size_type, const Hash_Fn&, const Comb_Probe_Fn&);
  88
  89       ranged_probe_fn(size_type, const Hash_Fn&, const Comb_Probe_Fn&,
  90                       const Probe_Fn&);
  91
  92       void
  93       swap(PB_DS_CLASS_C_DEC&);
  94
  95       void
  96       notify_resized(size_type);
  97
  98       inline size_type
  99       operator()(const_key_reference) const;
 100
 101       inline size_type
 102       operator()(const_key_reference, size_type, size_type) const;
 103     };
 104
 105     PB_DS_CLASS_T_DEC
 106     PB_DS_CLASS_C_DEC::
 107     ranged_probe_fn(size_type size)
 108     { Comb_Probe_Fn::notify_resized(size); }
 109
 110     PB_DS_CLASS_T_DEC
 111     PB_DS_CLASS_C_DEC::
 112     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn)
 113     : Hash_Fn(r_hash_fn)
 114     { Comb_Probe_Fn::notify_resized(size); }
 115
 116     PB_DS_CLASS_T_DEC
 117     PB_DS_CLASS_C_DEC::
 118     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn,
 119                     const Comb_Probe_Fn& r_comb_probe_fn)
 120     : Hash_Fn(r_hash_fn), Comb_Probe_Fn(r_comb_probe_fn)
 121     { comb_probe_fn_base::notify_resized(size); }
 122
 123     PB_DS_CLASS_T_DEC
 124     PB_DS_CLASS_C_DEC::
 125     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn,
 126                     const Comb_Probe_Fn& r_comb_probe_fn,
 127                     const Probe_Fn& r_probe_fn)
 128     : Hash_Fn(r_hash_fn), Comb_Probe_Fn(r_comb_probe_fn), Probe_Fn(r_probe_fn)
 129     { comb_probe_fn_base::notify_resized(size); }
 130
 131     PB_DS_CLASS_T_DEC
 132     void
 133     PB_DS_CLASS_C_DEC::
 134     swap(PB_DS_CLASS_C_DEC& other)
 135     {
 136       comb_probe_fn_base::swap(other);
 137       std::swap((Hash_Fn& )(*this), (Hash_Fn&)other);
 138     }
 139
 140     PB_DS_CLASS_T_DEC
 141     void
 142     PB_DS_CLASS_C_DEC::
 143     notify_resized(size_type size)
 144     { comb_probe_fn_base::notify_resized(size); }
 145
 146     PB_DS_CLASS_T_DEC
 147     inline typename PB_DS_CLASS_C_DEC::size_type
 148     PB_DS_CLASS_C_DEC::
 149     operator()(const_key_reference r_key) const
 150     { return comb_probe_fn_base::operator()(hash_fn_base::operator()(r_key)); }
 151
 152     PB_DS_CLASS_T_DEC
 153     inline typename PB_DS_CLASS_C_DEC::size_type
 154     PB_DS_CLASS_C_DEC::
 155     operator()(const_key_reference, size_type hash, size_type i) const
 156     {
 157       return comb_probe_fn_base::operator()(hash + probe_fn_base::operator()(i));
 158     }
 159
 160 #undef PB_DS_CLASS_T_DEC
 161 #undef PB_DS_CLASS_C_DEC
 162
 163 #define PB_DS_CLASS_T_DEC \
 164     template<typename Key, typename Hash_Fn, typename Allocator, \
 165              typename Comb_Probe_Fn, typename Probe_Fn>
 166
 167 #define PB_DS_CLASS_C_DEC \
 168     ranged_probe_fn<Key, Hash_Fn, Allocator, Comb_Probe_Fn, Probe_Fn, true>
 169
 170     /**
 171      * Specialization 2- The client supplies a probe function and a ranged
 172      *    probe function, and requests that hash values not be stored.
 173      **/
 174     template<typename Key, typename Hash_Fn, typename Allocator,
 175              typename Comb_Probe_Fn, typename Probe_Fn>
 176     class ranged_probe_fn<Key, Hash_Fn, Allocator, Comb_Probe_Fn,
 177                           Probe_Fn, true>
 178     : public Hash_Fn, public Comb_Probe_Fn, public Probe_Fn
 179     {
 180     protected:
 181       typedef typename Allocator::size_type size_type;
 182       typedef std::pair<size_type, size_type> comp_hash;
 183       typedef Comb_Probe_Fn comb_probe_fn_base;
 184       typedef Hash_Fn hash_fn_base;
 185       typedef Probe_Fn probe_fn_base;
 186       typedef typename Allocator::template rebind<Key>::other key_allocator;
 187       typedef typename key_allocator::const_reference const_key_reference;
 188
 189       ranged_probe_fn(size_type);
 190
 191       ranged_probe_fn(size_type, const Hash_Fn&);
 192
 193       ranged_probe_fn(size_type, const Hash_Fn&,
 194                       const Comb_Probe_Fn&);
 195
 196       ranged_probe_fn(size_type, const Hash_Fn&, const Comb_Probe_Fn&,
 197                       const Probe_Fn&);
 198
 199       void
 200       swap(PB_DS_CLASS_C_DEC&);
 201
 202       void
 203       notify_resized(size_type);
 204
 205       inline comp_hash
 206       operator()(const_key_reference) const;
 207
 208       inline size_type
 209       operator()(const_key_reference, size_type, size_type) const;
 210
 211       inline size_type
 212       operator()(const_key_reference, size_type) const;
 213     };
 214
 215     PB_DS_CLASS_T_DEC
 216     PB_DS_CLASS_C_DEC::
 217     ranged_probe_fn(size_type size)
 218     { Comb_Probe_Fn::notify_resized(size); }
 219
 220     PB_DS_CLASS_T_DEC
 221     PB_DS_CLASS_C_DEC::
 222     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn)
 223     : Hash_Fn(r_hash_fn)
 224     { Comb_Probe_Fn::notify_resized(size); }
 225
 226     PB_DS_CLASS_T_DEC
 227     PB_DS_CLASS_C_DEC::
 228     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn,
 229                     const Comb_Probe_Fn& r_comb_probe_fn)
 230     : Hash_Fn(r_hash_fn), Comb_Probe_Fn(r_comb_probe_fn)
 231     { comb_probe_fn_base::notify_resized(size); }
 232
 233     PB_DS_CLASS_T_DEC
 234     PB_DS_CLASS_C_DEC::
 235     ranged_probe_fn(size_type size, const Hash_Fn& r_hash_fn,
 236                     const Comb_Probe_Fn& r_comb_probe_fn,
 237                     const Probe_Fn& r_probe_fn)
 238     : Hash_Fn(r_hash_fn), Comb_Probe_Fn(r_comb_probe_fn), Probe_Fn(r_probe_fn)
 239     { comb_probe_fn_base::notify_resized(size); }
 240
 241     PB_DS_CLASS_T_DEC
 242     void
 243     PB_DS_CLASS_C_DEC::
 244     swap(PB_DS_CLASS_C_DEC& other)
 245     {
 246       comb_probe_fn_base::swap(other);
 247       std::swap((Hash_Fn& )(*this), (Hash_Fn& )other);
 248     }
 249
 250     PB_DS_CLASS_T_DEC
 251     void
 252     PB_DS_CLASS_C_DEC::
 253     notify_resized(size_type size)
 254     { comb_probe_fn_base::notify_resized(size); }
 255
 256     PB_DS_CLASS_T_DEC
 257     inline typename PB_DS_CLASS_C_DEC::comp_hash
 258     PB_DS_CLASS_C_DEC::
 259     operator()(const_key_reference r_key) const
 260     {
 261       const size_type hash = hash_fn_base::operator()(r_key);
 262       return std::make_pair(comb_probe_fn_base::operator()(hash), hash);
 263     }
 264
 265     PB_DS_CLASS_T_DEC
 266     inline typename PB_DS_CLASS_C_DEC::size_type
 267     PB_DS_CLASS_C_DEC::
 268     operator()(const_key_reference, size_type hash, size_type i) const
 269     {
 270       return comb_probe_fn_base::operator()(hash + probe_fn_base::operator()(i));
 271     }
 272
 273     PB_DS_CLASS_T_DEC
 274     inline typename PB_DS_CLASS_C_DEC::size_type
 275     PB_DS_CLASS_C_DEC::
 276     operator()
 277 #ifdef _GLIBCXX_DEBUG
 278       (const_key_reference r_key, size_type hash) const
 279 #else
 280       (const_key_reference /*r_key*/, size_type hash) const
 281 #endif
 282     {
 283       _GLIBCXX_DEBUG_ASSERT(hash == hash_fn_base::operator()(r_key));
 284       return hash;
 285     }
 286
 287 #undef PB_DS_CLASS_T_DEC
 288 #undef PB_DS_CLASS_C_DEC
 289
 290     /**
 291      * Specialization 3 and 4
 292      * The client does not supply a hash function or probe function,
 293      * and requests that hash values not be stored.
 294      **/
 295     template<typename Key, typename Allocator, typename Comb_Probe_Fn>
 296     class ranged_probe_fn<Key, null_hash_fn, Allocator, Comb_Probe_Fn,
 297                           null_probe_fn, false>
 298     : public Comb_Probe_Fn, public null_hash_fn, public null_probe_fn
 299     {
 300     protected:
 301       typedef typename Allocator::size_type size_type;
 302       typedef Comb_Probe_Fn comb_probe_fn_base;
 303       typedef typename Allocator::template rebind<Key>::other key_allocator;
 304       typedef typename key_allocator::const_reference const_key_reference;
 305
 306       ranged_probe_fn(size_type size)
 307       { Comb_Probe_Fn::notify_resized(size); }
 308
 309       ranged_probe_fn(size_type, const Comb_Probe_Fn& r_comb_probe_fn)
 310       : Comb_Probe_Fn(r_comb_probe_fn)
 311       { }
 312
 313       ranged_probe_fn(size_type, const null_hash_fn&,
 314                       const Comb_Probe_Fn& r_comb_probe_fn,
 315                       const null_probe_fn&)
 316       : Comb_Probe_Fn(r_comb_probe_fn)
 317       { }
 318
 319       void
 320       swap(ranged_probe_fn& other)
 321       { comb_probe_fn_base::swap(other); }
 322     };
 323   } // namespace detail
 324 } // namespace __gnu_pbds
 325
 326 #endif
 327