1 /*
   2  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #ifndef __SAFE_ALLOC_H__
  27 #define __SAFE_ALLOC_H__
  28 
  29 #include "j2d_md.h"
  30 
  31 /*
  32  * Macroses defined below are wrappers for alloc functions
  33  * that perform buffer size calculation with integer overflow
  34  * check.
  35  */
  36 #define SAFE_TO_ALLOC_2(c, sz)                                             \
  37     (((c) > 0) && ((sz) > 0) &&                                            \
  38      ((0xffffffffu / ((juint)(c))) > ((juint)(sz))))
  39 
  40 #define SAFE_TO_ALLOC_3(w, h, sz)                                          \
  41     (((w) > 0) && ((h) > 0) && ((sz) > 0) &&                               \
  42      (((0xffffffffu / ((juint)(w))) / ((juint)(h))) > ((juint)(sz))))
  43 
  44 
  45 #endif // __SAFE_ALLOC_H__