reactos/dll/win32/fmifs/compress.c

   1 /* $Id$
   2  *
   3  * COPYING:     See the top level directory
   4  * PROJECT:     ReactOS
   5  * FILE:        reactos/lib/fmifs/compress.c
   6  * DESCRIPTION: File management IFS utility functions
   7  * PROGRAMMER:  Emanuele Aliberti
   8  * UPDATED
   9  *      1999-02-16 (Emanuele Aliberti)
  10  *              Entry points added.
  11  */
  12 #include "precomp.h"
  13
  14 /*
  15  * @implemented
  16  */
  17 BOOL STDCALL
  18 EnableVolumeCompression (PWCHAR DriveRoot,
  19                          USHORT Compression)
  20 {
  21   HANDLE hFile = CreateFileW(DriveRoot,
  22                              FILE_READ_DATA | FILE_WRITE_DATA,
  23                              FILE_SHARE_READ | FILE_SHARE_WRITE,
  24                              NULL,
  25                              OPEN_EXISTING,
  26                              FILE_FLAG_BACKUP_SEMANTICS,
  27                              NULL);
  28
  29   if(hFile != INVALID_HANDLE_VALUE)
  30   {
  31     DWORD RetBytes;
  32     BOOL Ret = DeviceIoControl(hFile,
  33                                FSCTL_SET_COMPRESSION,
  34                                &Compression,
  35                                sizeof(USHORT),
  36                                NULL,
  37                                0,
  38                                &RetBytes,
  39                                NULL);
  40
  41     CloseHandle(hFile);
  42
  43     return (Ret != 0);
  44   }
  45
  46   return FALSE;
  47 }
  48
  49 /* EOF */