+ if(pair)
+ {
+ if(hashtable->free_key)
+ hashtable->free_key(key);
+ if(hashtable->free_value)
+ hashtable->free_value(pair->value);
+ pair->value = value;
+ }
+ else
+ {
+ pair = malloc(sizeof(pair_t));
+ if(!pair)
+ return -1;
+
+ pair->key = key;
+ pair->value = value;
+ pair->hash = hash;
+ list_init(&pair->list);