+static int continuum_item_cmp(const void *t1, const void *t2)
+{
+ struct continuum_item *ct1 = (struct continuum_item *)t1;
+ struct continuum_item *ct2 = (struct continuum_item *)t2;
+ if(ct1->value == ct2->value)
+ return 0;
+ else if(ct1->value > ct2->value)
+ return 1;
+ else
+ return -1;
+}
+
+static uint32_t internal_generate_ketama_md5(char *key, size_t key_length)
+{
+ unsigned char results[16];
+
+ md5_signature((unsigned char*)key, (unsigned int)key_length, results);
+
+ return ( (results[3] ) << 24)
+ | ( (results[2] ) << 16)
+ | ( (results[1] ) << 8)
+ | ( results[0] );
+}
+
+void update_continuum(memcached_st *ptr)
+{
+ int index;
+ int host_index;
+ int continuum_index= 0;
+ int value;
+ memcached_server_st *list = ptr->hosts;
+
+ for (host_index = 0; host_index < ptr->number_of_hosts; ++host_index)
+ {
+ for(index= 1; index <= MEMCACHED_POINTS_PER_SERVER; ++index)
+ {
+ char sort_host[MEMCACHED_MAX_HOST_SORT_LENGTH]= "";
+ size_t sort_host_length;
+
+ sort_host_length= snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH, "%s:%d-%d",
+ list[host_index].hostname, list[host_index].port, index);
+ WATCHPOINT_ASSERT(sort_host_length);
+ value= internal_generate_ketama_md5(sort_host, sort_host_length);
+ ptr->continuum[continuum_index].index= host_index;
+ ptr->continuum[continuum_index++].value= value;
+ }
+ }
+
+ qsort(ptr->continuum, ptr->number_of_hosts * MEMCACHED_POINTS_PER_SERVER, sizeof(struct continuum_item), continuum_item_cmp);
+#ifdef HAVE_DEBUG
+ for(index= 0; index < ptr->number_of_hosts * MEMCACHED_POINTS_PER_SERVER - 1; ++index)
+ {
+ WATCHPOINT_ASSERT(ptr->continuum[index].value < ptr->continuum[index + 1].value);
+ }
+#endif
+}
+
+