1 /* vm/access.c - checking access rights
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Edwin Steiner
31 $Id: access.c 2074 2005-03-25 12:23:30Z edwin $
36 #include "vm/access.h"
37 #include "vm/builtin.h"
39 /****************************************************************************/
41 /****************************************************************************/
48 #define ACCESS_ASSERT(cond) assert(cond)
50 #define ACCESS_ASSERT(cond)
53 /****************************************************************************/
55 /****************************************************************************/
57 /* for documentation see access.h */
59 is_accessible_class(classinfo *referer,classinfo *cls)
61 ACCESS_ASSERT(referer);
64 /* public classes are always accessible */
65 if ((cls->flags & ACC_PUBLIC) != 0)
68 /* a class in the same package is always accessible */
69 if (SAME_PACKAGE(referer,cls))
72 /* a non-public class in another package is not accessible */
76 /* for documentation see access.h */
78 is_accessible_member(classinfo *referer,classinfo *declarer,s4 memberflags)
80 ACCESS_ASSERT(referer);
81 ACCESS_ASSERT(declarer);
83 /* public members are accessible */
84 if ((memberflags & ACC_PUBLIC) != 0)
87 /* {declarer is not an interface} */
89 /* private members are only accessible by the class itself */
90 if ((memberflags & ACC_PRIVATE) != 0)
91 return (referer == declarer);
93 /* {the member is protected or package private} */
95 /* protected and package private members are accessible in the same package */
96 if (SAME_PACKAGE(referer,declarer))
99 /* package private members are not accessible outside the package */
100 if ((memberflags & ACC_PROTECTED) == 0)
103 /* {the member is protected and declarer is in another package} */
105 /* a necessary condition for access is that referer is a subclass of declarer */
106 if (builtin_isanysubclass(referer,declarer))
113 * These are local overrides for various environment variables in Emacs.
114 * Please do not remove this and leave it at the end of the file, where
115 * Emacs will automagically detect them.
116 * ---------------------------------------------------------------------
119 * indent-tabs-mode: t
123 * vim:noexpandtab:sw=4:ts=4: