workbench/fs/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 #ifdef __PPC__
  31 #define ARGS(ap) ap->overflow_arg_area
  32 #else
  33 #define ARGS(ap) (ULONG *)ap
  34 #endif
  35
  36 void SendEvent(LONG event) {
  37     struct IOStdReq *InputRequest;
  38     struct MsgPort *InputPort;
  39     struct InputEvent *ie;
  40
  41     if ((InputPort = (struct MsgPort*)CreateMsgPort())) {
  42
  43         if ((InputRequest = (struct IOStdReq*)CreateIORequest(InputPort, sizeof(struct IOStdReq)))) {
  44
  45             if (!OpenDevice("input.device", 0, (struct IORequest*)InputRequest, 0)) {
  46
  47                 if ((ie = AllocVec(sizeof(struct InputEvent), MEMF_PUBLIC | MEMF_CLEAR))) {
  48                     ie->ie_Class = event;
  49                     InputRequest->io_Command = IND_WRITEEVENT;
  50                     InputRequest->io_Data = ie;
  51                     InputRequest->io_Length = sizeof(struct InputEvent);
  52
  53                     DoIO((struct IORequest*)InputRequest);
  54
  55                     FreeVec(ie);
  56                 }
  57                 CloseDevice((struct IORequest*)InputRequest);
  58             }
  59             DeleteIORequest((struct IORequest *)InputRequest);
  60         }
  61         DeleteMsgPort (InputPort);
  62     }
  63 }
  64
  65 /*-------------------------------------------------------------------------*/
  66
  67 int ilog2(ULONG data) {
  68     int bitoffset = 31;
  69     ULONG bitmask = 1 << bitoffset;
  70
  71     do {
  72         if ((data & bitmask) != 0)
  73             return bitoffset;
  74
  75     bitoffset--;
  76     bitmask >>= 1;
  77   } while (bitmask != 0);
  78
  79   return 0;
  80 }
  81
  82 /*-----------------------------------------------------------------------*/
  83
  84 void ErrorMessage(char *fmt, ...)
  85 {
  86         va_list ap;
  87         struct IntuitionBase *IntuitionBase;
  88
  89         IntuitionBase = (struct IntuitionBase *)OpenLibrary("intuition.library", 36);
  90         if (IntuitionBase) {
  91                 struct EasyStruct es = {
  92                         sizeof (struct EasyStruct),
  93                         0,
  94                         "FAT filesystem critical error",
  95                         NULL,
  96                         "Ok"
  97                 };
  98                 va_start(ap, fmt);
  99
 100                 es.es_TextFormat = fmt;
 101                 EasyRequestArgs(NULL, &es, NULL, ARGS(ap));
 102                 va_end(ap);
 103                 CloseLibrary((struct Library *)IntuitionBase);
 104         }
 105 }
 106