reactos/sdk/lib/rtl/access.c

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