posix/lib/psxdll/misc/safeobj.c

   1 /* $Id: safeobj.c,v 1.2 2002/02/20 09:17:57 hyperion Exp $
   2  */
   3 /*
   4  * COPYRIGHT:   See COPYING in the top level directory
   5  * PROJECT:     ReactOS POSIX+ Subsystem
   6  * FILE:        subsys/psx/lib/psxdll/misc/safeobj.c
   7  * PURPOSE:     safe checking of user-provided objects
   8  * PROGRAMMER:  KJK::Hyperion <noog@libero.it>
   9  * UPDATE HISTORY:
  10  *              09/01/2002: Created
  11  */
  12
  13 #include <psx/safeobj.h>
  14 #include <psx/debug.h>
  15
  16 int __safeobj_validate(void *obj, __magic_t refsignature)
  17 {
  18  if(obj == 0)
  19   return (0);
  20  else
  21  {
  22   /* cast the object to a magic number */
  23   __magic_t mSignature = *((__magic_t *)obj);
  24
  25   ERRIF
  26   (
  27    mSignature != refsignature,
  28    "invalid object at %X: signature is \"%c%c%c%c\", should be \"%c%c%c%c\"",
  29    obj,
  30    MAGIC_DECOMPOSE(refsignature),
  31    MAGIC_DECOMPOSE(mSignature)
  32   );
  33
  34   if(mSignature == refsignature)
  35    /* signatures match: ok */
  36    return (-1);
  37   else
  38    /* signatures mismatch: fail */
  39    return (0);
  40
  41  }
  42 }
  43
  44 /* EOF */
  45