reactos/lib/rtl/access.c

   1 /* COPYRIGHT:       See COPYING in the top level directory
   2  * PROJECT:         ReactOS system libraries
   3  * FILE:            lib/rtl/access.c
   4  * PURPOSE:         Access rights handling functions
   5  * PROGRAMMERS:     Eric Kohl
   6  */
   7
   8 /* INCLUDES *****************************************************************/
   9
  10 #include <rtl.h>
  11 #define NDEBUG
  12 #include <debug.h>
  13
  14 /* FUNCTIONS ***************************************************************/
  15
  16 /*
  17  * @implemented
  18  */
  19 BOOLEAN
  20 NTAPI
  21 RtlAreAllAccessesGranted(IN ACCESS_MASK GrantedAccess,
  22                          IN ACCESS_MASK DesiredAccess)
  23 {
  24     PAGED_CODE_RTL();
  25
  26     /* Return if there's no leftover bits after granting all of them */
  27     return !(~GrantedAccess & DesiredAccess);
  28 }
  29
  30 /*
  31  * @implemented
  32  */
  33 BOOLEAN
  34 NTAPI
  35 RtlAreAnyAccessesGranted(IN ACCESS_MASK GrantedAccess,
  36                          IN ACCESS_MASK DesiredAccess)
  37 {
  38     PAGED_CODE_RTL();
  39
  40     /* Return if there's any leftover bits after granting all of them */
  41     return ((GrantedAccess & DesiredAccess) != 0);
  42 }
  43
  44 /*
  45  * @implemented
  46  */
  47 VOID
  48 NTAPI
  49 RtlMapGenericMask(IN OUT PACCESS_MASK AccessMask,
  50                   IN PGENERIC_MAPPING GenericMapping)
  51 {
  52     PAGED_CODE_RTL();
  53
  54     /* Convert mappings */
  55     if (*AccessMask & GENERIC_READ) *AccessMask |= GenericMapping->GenericRead;
  56     if (*AccessMask & GENERIC_WRITE) *AccessMask |= GenericMapping->GenericWrite;
  57     if (*AccessMask & GENERIC_EXECUTE) *AccessMask |= GenericMapping->GenericExecute;
  58     if (*AccessMask & GENERIC_ALL) *AccessMask |= GenericMapping->GenericAll;
  59
  60     /* Clear generic flags */
  61     *AccessMask &= ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
  62 }
  63
  64 /* EOF */