/** Collect the entity representing the implementation of this
* method (not the same if inherited) and all entities for overwriting
- * implementations in "set".
- * If the implementation of the method is not included in the
- * compilation unit "open" is set to true.
+ * implementations in parameter set.
* A recursive descend in the overwritten relation.
* Cycle-free, therefore must terminate.
*
- * @param method
+ * @param method the overwritten method
* @param set A set of entities.
- * @param size Number of entities in set.
- * @param open
+ *
+ * @return Number of entities in set.
*/
-static void collect_impls(ir_entity *method, eset *set, int *size, int *open)
+static size_t collect_impls(ir_entity *method, eset *set)
{
- int i;
+ size_t i;
+ size_t size = 0;
if (get_entity_irg(method) != NULL) {
+ /* has an implementation */
eset_insert(set, method);
- ++(*size);
+ ++size;
}
/*- recursive descent -*/
- for (i = get_entity_n_overwrittenby(method) - 1; i >= 0; --i)
- collect_impls(get_entity_overwrittenby(method, i), set, size, open);
+ for (i = get_entity_n_overwrittenby(method); i > 0;)
+ size += collect_impls(get_entity_overwrittenby(method, --i), set);
+ return size;
}
-/** Alle Methoden bestimmen, die die �bergebene Methode �berschreiben
- * (und implementieren). In der zur�ckgegebenen Reihung kommt jede
- * Methode nur einmal vor. Der Wert 'NULL' steht f�r unbekannte
- * (externe) Methoden. Die zur�ckgegebene Reihung mu� vom Aufrufer
- * wieder freigegeben werden (siehe "DEL_ARR_F"). Gibt es �berhaupt
- * keine Methoden, die "method" �berschreiben, so gibt die Methode
- * "NULL" zur�ck.
+/**
+ * Determine all methods that overwrite the given method (and implement it).
+ * The returned array must be freed by the caller (see DEL_ARR_F).
+ * If the set of overwriting methods is empty, returns NULL.
*
- * @param method
+ * @param method the method
*/
-static ir_entity ** get_impl_methods(ir_entity * method)
+static ir_entity **get_impl_methods(ir_entity *method)
{
- eset * set = eset_create();
- int size = 0;
- ir_entity ** arr;
- int open = 0;
+ ir_entity **arr;
+ eset *set = eset_create();
+ size_t size;
/* Collect all method entities that can be called here */
- collect_impls(method, set, &size, &open);
+ size = collect_impls(method, set);
- /* Vorgaenger einfuegen. */
- if (size == 0 && !open) {
- /* keine implementierte �berschriebene Methode */
+ if (size == 0) {
+ /* no overwriting methods found */
arr = NULL;
- } else if (open) {
- ir_entity * ent;
- arr = NEW_ARR_F(ir_entity *, size + 1);
- arr[0] = NULL; /* Represents open method */
- for (ent = (ir_entity*) eset_first(set); size > 0; ent = (ir_entity*) eset_next(set), --size)
- arr[size] = ent;
} else {
ir_entity * ent;
arr = NEW_ARR_F(ir_entity *, size);
- for (size -= 1, ent = (ir_entity*) eset_first(set); size >= 0; ent = (ir_entity*) eset_next(set), --size)
- arr[size] = ent;
+ for (ent = (ir_entity*) eset_first(set); size > 0; ent = (ir_entity*) eset_next(set))
+ arr[--size] = ent;
}
eset_destroy(set);
return arr;