Implemented objc_copyProtocolList().

objc/runtime.h

@@ -600,6 +600,15 @@ objc_property_t *protocol_copyPropertyList(Protocol *p, unsigned int *count);
  */
 Protocol **protocol_copyProtocolList(Protocol *p, unsigned int *count);
 
+/**
+ * Returns all of the protocols that the runtime is aware of.  Note that
+ * protocols compiled by GCC and not attacked to classes may not have been
+ * registered with the runtime.  The number of protocols returned is stored at
+ * the address indicated by the pointer argument.
+ *
+ * The caller is responsible for freeing the returned array.
+ */
+Protocol **objc_copyProtocolList(unsigned int *outCount);
 /**
  * Returns the method description for the specified method within a given
  * protocol.

protocol.c

@@ -474,3 +474,23 @@ BOOL protocol_isEqual(Protocol *p, Protocol *other)
 	return NO;
 }
 
+Protocol **objc_copyProtocolList(unsigned int *outCount)
+{
+	unsigned int total = known_protocol_table->table_used;
+	Protocol **p = calloc(sizeof(Protocol*), known_protocol_table->table_used);
+
+	struct protocol_table_enumerator *e = NULL;
+	Protocol *next;
+
+	unsigned int count = 0;
+	while ((count < total) && (next = protocol_next(known_protocol_table, &e)))
+	{
+		p[count++] = next;
+	}
+	if (NULL != outCount)
+	{
+		*outCount = total;
+	}
+	return p;
+}
+