workbench/fs/fat/support.c

   1 /*
   2  * fat.handler - FAT12/16/32 filesystem handler
   3  *
   4  * Copyright © 2006 Marek Szyprowski
   5  * Copyright © 2007 The AROS Development Team
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the same terms as AROS itself.
   9  *
  10  * $Id$
  11  */
  12
  13 #include <exec/types.h>
  14 #include <exec/execbase.h>
  15 #include <dos/dosextens.h>
  16 #include <dos/filehandler.h>
  17 #include <devices/input.h>
  18 #include <devices/inputevent.h>
  19 #include <intuition/intuition.h>
  20 #include <intuition/intuitionbase.h>
  21
  22 #include <proto/intuition.h>
  23 #include <proto/exec.h>
  24
  25 #include <string.h>
  26
  27 #include "fat_fs.h"
  28
  29 void SendEvent(LONG event) {
  30     struct IOStdReq *InputRequest;
  31     struct MsgPort *InputPort;
  32     struct InputEvent *ie;
  33
  34     if ((InputPort = (struct MsgPort*)CreateMsgPort())) {
  35
  36         if ((InputRequest = (struct IOStdReq*)CreateIORequest(InputPort, sizeof(struct IOStdReq)))) {
  37
  38             if (!OpenDevice("input.device", 0, (struct IORequest*)InputRequest, 0)) {
  39
  40                 if ((ie = AllocVec(sizeof(struct InputEvent), MEMF_PUBLIC | MEMF_CLEAR))) {
  41                     ie->ie_Class = event;
  42                     InputRequest->io_Command = IND_WRITEEVENT;
  43                     InputRequest->io_Data = ie;
  44                     InputRequest->io_Length = sizeof(struct InputEvent);
  45
  46                     DoIO((struct IORequest*)InputRequest);
  47
  48                     FreeVec(ie);
  49                 }
  50                 CloseDevice((struct IORequest*)InputRequest);
  51             }
  52             DeleteIORequest (InputRequest);
  53         }
  54         DeleteMsgPort (InputPort);
  55     }
  56 }
  57
  58 /*-------------------------------------------------------------------------*/
  59
  60 int ilog2(ULONG data) {
  61     int bitoffset = 31;
  62     ULONG bitmask = 1 << bitoffset;
  63
  64     do {
  65         if ((data & bitmask) != 0)
  66             return bitoffset;
  67
  68     bitoffset--;
  69     bitmask >>= 1;
  70   } while (bitmask != 0);
  71
  72   return 0;
  73 }
  74
  75 /*-----------------------------------------------------------------------*/