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 #endif // __SAFE_ALLOC_H__

  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      ((0x7fffffff / (c)) > (sz)))
  39 
  40 #define SAFE_TO_ALLOC_3(w, h, sz)                                          \
  41     (((w) > 0) && ((h) > 0) && ((sz) > 0) &&                               \
  42      (((0x7fffffff / (w)) / (h)) > (sz)))
  43 
  44 #endif // __SAFE_ALLOC_H__