git.m6w6.name Git - awesomized/libmemcached/blob - libhashkit/has.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions are
   9  *  met:
  10  *
  11  *      * Redistributions of source code must retain the above copyright
  12  *  notice, this list of conditions and the following disclaimer.
  13  *
  14  *      * Redistributions in binary form must reproduce the above
  15  *  copyright notice, this list of conditions and the following disclaimer
  16  *  in the documentation and/or other materials provided with the
  17  *  distribution.
  18  *
  19  *      * The names of its contributors may not be used to endorse or
  20  *  promote products derived from this software without specific prior
  21  *  written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  29  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include <libhashkit/common.h>
  38
  39 bool libhashkit_has_algorithm(const hashkit_hash_algorithm_t algo)
  40 {
  41   switch (algo)
  42   {
  43   case HASHKIT_HASH_FNV1_64:
  44   case HASHKIT_HASH_FNV1A_64:
  45 #if __WORDSIZE == 64 && defined(HAVE_FNV64_HASH)
  46     return true;
  47 #else
  48     return false;
  49 #endif
  50
  51   case HASHKIT_HASH_HSIEH:
  52 #ifdef HAVE_HSIEH_HASH
  53     return true;
  54 #else
  55     return false;
  56 #endif
  57
  58   case HASHKIT_HASH_MURMUR:
  59 #ifdef HAVE_MURMUR_HASH
  60     return true;
  61 #else
  62     return false;
  63 #endif
  64
  65   case HASHKIT_HASH_FNV1_32:
  66   case HASHKIT_HASH_FNV1A_32:
  67   case HASHKIT_HASH_DEFAULT:
  68   case HASHKIT_HASH_MD5:
  69   case HASHKIT_HASH_CRC:
  70   case HASHKIT_HASH_JENKINS:
  71   case HASHKIT_HASH_CUSTOM:
  72     return true;
  73
  74   case HASHKIT_HASH_MAX:
  75     break;
  76   }
  77
  78   return false;
  79 }