rom/filesys/fat/support.c

   1 /*
   2  * fat-handler - FAT12/16/32 filesystem handler
   3  *
   4  * Copyright © 2006 Marek Szyprowski
   5  * Copyright © 2007-2015 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 {
  32     struct IOStdReq *InputRequest;
  33     struct MsgPort *InputPort;
  34     struct InputEvent *ie;
  35
  36     if ((InputPort = (struct MsgPort *)CreateMsgPort()))
  37     {
  38
  39         if ((InputRequest = (struct IOStdReq *)CreateIORequest(InputPort,
  40             sizeof(struct IOStdReq))))
  41         {
  42
  43             if (!OpenDevice("input.device", 0,
  44                 (struct IORequest *)InputRequest, 0))
  45             {
  46
  47                 if ((ie = AllocVec(sizeof(struct InputEvent),
  48                     MEMF_PUBLIC | MEMF_CLEAR)))
  49                 {
  50                     ie->ie_Class = event;
  51                     InputRequest->io_Command = IND_WRITEEVENT;
  52                     InputRequest->io_Data = ie;
  53                     InputRequest->io_Length = sizeof(struct InputEvent);
  54
  55                     DoIO((struct IORequest *)InputRequest);
  56
  57                     FreeVec(ie);
  58                 }
  59                 CloseDevice((struct IORequest *)InputRequest);
  60             }
  61             DeleteIORequest((struct IORequest *)InputRequest);
  62         }
  63         DeleteMsgPort(InputPort);
  64     }
  65 }
  66
  67 int ilog2(ULONG data)
  68 {
  69     int bitoffset = 31;
  70     ULONG bitmask = 1 << bitoffset;
  71
  72     do
  73     {
  74         if ((data & bitmask) != 0)
  75             return bitoffset;
  76
  77         bitoffset--;
  78         bitmask >>= 1;
  79     }
  80     while (bitmask != 0);
  81
  82     return 0;
  83 }
  84
  85 LONG ErrorMessageArgs(char *fmt, char *options, IPTR *ap,
  86     struct Globals *glob)
  87 {
  88     struct IntuitionBase *IntuitionBase;
  89     LONG answer = 0;
  90
  91     IntuitionBase =
  92         (struct IntuitionBase *)OpenLibrary("intuition.library", 36);
  93     if (IntuitionBase)
  94     {
  95         struct EasyStruct es =
  96         {
  97             sizeof(struct EasyStruct),
  98             0,
  99             "FAT filesystem",
 100             NULL,
 101             options
 102         };
 103
 104         es.es_TextFormat = fmt;
 105         answer = EasyRequestArgs(NULL, &es, NULL, ap);
 106         CloseLibrary((struct Library *)IntuitionBase);
 107     }
 108
 109     return answer;
 110 }