* macro \ref TUPLEITEMINIT may be used to initialize particular
* tupleschema records, which each become tupleitem declaration for
* its particular arity and parts declarations
+ * \extends itemkeyfun
*/
typedef struct {
/**
* itemkeyfun pointer to be within a tupleschema record so as to
* provide the handling of the tuple columns.
*/
- itemkeyfun functions;
+ itemkeyfun base;
/**
* This is the number of columns in a tuple.
itemkeyfun **columns;
} tupleschema;
-/**
- * This callback function returns the hashcode of a key.
- *
- * \param this is a pointer to the itemkeyfun record from where this
- * callback got invoked
- *
- * \param key is the key to produce a hascode for
- *
- * \returns the hashcode which is a vector_index (i.e. unsigned long)
- *
- * The hashcode is used for indexing into the backing vector for
- * finding the an item via its key. The same key must map consistently
- * to the same hashcode while the hashtable contains an item with that
- * key. Different keys map map to the same hashcode, in which case the
- * vector placement is made at the first empty or hole slot following
- * the hashcode index.
- */
-extern unsigned long tupleitem_hashcode(itemkeyfun *this,void *key);
-
-/**
- * This callback function determines whether an item has a
- * given key or not.
- */
-extern int tupleitem_haskey(itemkeyfun *this,void *item,void *key);
-
-/**
- * This callback function returns the key of an item by considering
- * the arity and schema.
- */
-extern void *tupleitem_itemkey(itemkeyfun *this,void *item);
-
-/**
- * This callback function handles a key obtained from the itemkey
- * callback function to reclaim temporary allocation.
- */
-extern void tupleitem_releasekey(itemkeyfun *this,void *key);
-
/**
* Create a tuples with given values.
*/
*/
extern tupleschema *tupleschema_mask(tupleschema *schema,...);
+/**
+ * \brief Return 1/0 to indicate whether the query matches the item.
+ */
+extern int tupleschema_match(tupleschema *def,tuple *query,tuple *item);
+
/**
* The TUPLEITEMINIT macro is used for initializing a tupleschema
* record appropriately for a given arity and corresponding sequence