git.m6w6.name Git - m6w6/libmemcached/blob - libhashkit/hashkit.cc

   1 /* HashKit
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  */
   8
   9 #include <libhashkit/common.h>
  10
  11 static inline void _hashkit_init(hashkit_st *self)
  12 {
  13   self->base_hash.function= hashkit_one_at_a_time;
  14   self->base_hash.context= NULL;
  15
  16   self->distribution_hash.function= hashkit_one_at_a_time;
  17   self->distribution_hash.context= NULL;
  18
  19   self->flags.is_base_same_distributed= true;
  20   self->_key= NULL;
  21 }
  22
  23 static inline hashkit_st *_hashkit_create(hashkit_st *self)
  24 {
  25   if (self)
  26   {
  27     self->options.is_allocated= false;
  28   }
  29   else
  30   {
  31     self= (hashkit_st*)calloc(1, sizeof(hashkit_st));
  32     if (self == NULL)
  33     {
  34       return NULL;
  35     }
  36
  37     self->options.is_allocated= true;
  38   }
  39
  40   return self;
  41 }
  42
  43 hashkit_st *hashkit_create(hashkit_st *self)
  44 {
  45   self= _hashkit_create(self);
  46   if (self == NULL)
  47   {
  48     return NULL;
  49   }
  50
  51   _hashkit_init(self);
  52
  53   return self;
  54 }
  55
  56
  57 void hashkit_free(hashkit_st *self)
  58 {
  59   if (self and self->_key)
  60   {
  61     free(self->_key);
  62     self->_key= NULL;
  63   }
  64
  65   if (hashkit_is_allocated(self))
  66   {
  67     free(self);
  68   }
  69 }
  70
  71 hashkit_st *hashkit_clone(hashkit_st *destination, const hashkit_st *source)
  72 {
  73   if (source == NULL)
  74   {
  75     return hashkit_create(destination);
  76   }
  77
  78   /* new_clone will be a pointer to destination */
  79   destination= _hashkit_create(destination);
  80
  81   // Should only happen on allocation failure.
  82   if (destination == NULL)
  83   {
  84     return NULL;
  85   }
  86
  87   destination->base_hash= source->base_hash;
  88   destination->distribution_hash= source->distribution_hash;
  89   destination->flags= source->flags;
  90   destination->_key= aes_clone_key(static_cast<aes_key_t*>(source->_key));
  91
  92   return destination;
  93 }
  94
  95 bool hashkit_compare(const hashkit_st *first, const hashkit_st *second)
  96 {
  97   if (not first or not second)
  98     return false;
  99
 100   if (first->base_hash.function == second->base_hash.function and
 101       first->base_hash.context == second->base_hash.context and
 102       first->distribution_hash.function == second->distribution_hash.function and
 103       first->distribution_hash.context == second->distribution_hash.context and
 104       first->flags.is_base_same_distributed == second->flags.is_base_same_distributed)
 105   {
 106     return true;
 107   }
 108
 109   return false;
 110 }