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 2096 2005-03-27 18:57:00Z 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 /* XXX specially check access to array classes? (vmspec 5.3.3) */
66 /* public classes are always accessible */
67 if ((cls->flags & ACC_PUBLIC) != 0)
70 /* a class in the same package is always accessible */
71 if (SAME_PACKAGE(referer,cls))
74 /* a non-public class in another package is not accessible */
78 /* for documentation see access.h */
80 is_accessible_member(classinfo *referer,classinfo *declarer,s4 memberflags)
82 ACCESS_ASSERT(referer);
83 ACCESS_ASSERT(declarer);
85 /* public members are accessible */
86 if ((memberflags & ACC_PUBLIC) != 0)
89 /* {declarer is not an interface} */
91 /* private members are only accessible by the class itself */
92 if ((memberflags & ACC_PRIVATE) != 0)
93 return (referer == declarer);
95 /* {the member is protected or package private} */
97 /* protected and package private members are accessible in the same package */
98 if (SAME_PACKAGE(referer,declarer))
101 /* package private members are not accessible outside the package */
102 if ((memberflags & ACC_PROTECTED) == 0)
105 /* {the member is protected and declarer is in another package} */
107 /* a necessary condition for access is that referer is a subclass of declarer */
108 ACCESS_ASSERT(referer->linked && declarer->linked);
109 if (builtin_isanysubclass(referer,declarer))
116 * These are local overrides for various environment variables in Emacs.
117 * Please do not remove this and leave it at the end of the file, where
118 * Emacs will automagically detect them.
119 * ---------------------------------------------------------------------
122 * indent-tabs-mode: t
126 * vim:noexpandtab:sw=4:ts=4: