rom/filesys/fat/support.c

   1 /*
   2  * fat-handler - FAT12/16/32 filesystem handler
   3  *
   4  * Copyright © 2006 Marek Szyprowski
   5  * Copyright © 2007-2008 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 <stdarg.h>
  26 #include <string.h>
  27
  28 #include "fat_fs.h"
  29
  30 void SendEvent(LONG event, struct Globals *glob) {
  31     struct IOStdReq *InputRequest;
  32     struct MsgPort *InputPort;
  33     struct InputEvent *ie;
  34
  35     if ((InputPort = (struct MsgPort*)CreateMsgPort())) {
  36
  37         if ((InputRequest = (struct IOStdReq*)CreateIORequest(InputPort, sizeof(struct IOStdReq)))) {
  38
  39             if (!OpenDevice("input.device", 0, (struct IORequest*)InputRequest, 0)) {
  40
  41                 if ((ie = AllocVec(sizeof(struct InputEvent), MEMF_PUBLIC | MEMF_CLEAR))) {
  42                     ie->ie_Class = event;
  43                     InputRequest->io_Command = IND_WRITEEVENT;
  44                     InputRequest->io_Data = ie;
  45                     InputRequest->io_Length = sizeof(struct InputEvent);
  46
  47                     DoIO((struct IORequest*)InputRequest);
  48
  49                     FreeVec(ie);
  50                 }
  51                 CloseDevice((struct IORequest*)InputRequest);
  52             }
  53             DeleteIORequest((struct IORequest *)InputRequest);
  54         }
  55         DeleteMsgPort (InputPort);
  56     }
  57 }
  58
  59 /*-------------------------------------------------------------------------*/
  60
  61 int ilog2(ULONG data) {
  62     int bitoffset = 31;
  63     ULONG bitmask = 1 << bitoffset;
  64
  65     do {
  66         if ((data & bitmask) != 0)
  67             return bitoffset;
  68
  69     bitoffset--;
  70     bitmask >>= 1;
  71   } while (bitmask != 0);
  72
  73   return 0;
  74 }
  75
  76 /*-----------------------------------------------------------------------*/
  77
  78 void ErrorMessageArgs(char *fmt, IPTR *ap, struct Globals *glob)
  79 {
  80         struct IntuitionBase *IntuitionBase;
  81
  82         IntuitionBase = (struct IntuitionBase *)OpenLibrary("intuition.library", 36);
  83         if (IntuitionBase) {
  84                 struct EasyStruct es = {
  85                         sizeof (struct EasyStruct),
  86                         0,
  87                         "FAT filesystem critical error",
  88                         NULL,
  89                         "Ok"
  90                 };
  91
  92                 es.es_TextFormat = fmt;
  93                 EasyRequestArgs(NULL, &es, NULL, ap);
  94                 CloseLibrary((struct Library *)IntuitionBase);
  95         }
  96 }
  97