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 #include <proto/alib.h>
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28
  29 #include "fat_fs.h"
  30
  31 void SendEvent(LONG event, struct Globals *glob)
  32 {
  33     struct IOStdReq *InputRequest;
  34     struct MsgPort *InputPort;
  35     struct InputEvent *ie;
  36
  37     if ((InputPort = (struct MsgPort *)CreateMsgPort()))
  38     {
  39
  40         if ((InputRequest = (struct IOStdReq *)CreateIORequest(InputPort,
  41             sizeof(struct IOStdReq))))
  42         {
  43
  44             if (!OpenDevice("input.device", 0,
  45                 (struct IORequest *)InputRequest, 0))
  46             {
  47
  48                 if ((ie = AllocVec(sizeof(struct InputEvent),
  49                     MEMF_PUBLIC | MEMF_CLEAR)))
  50                 {
  51                     ie->ie_Class = event;
  52                     InputRequest->io_Command = IND_WRITEEVENT;
  53                     InputRequest->io_Data = ie;
  54                     InputRequest->io_Length = sizeof(struct InputEvent);
  55
  56                     DoIO((struct IORequest *)InputRequest);
  57
  58                     FreeVec(ie);
  59                 }
  60                 CloseDevice((struct IORequest *)InputRequest);
  61             }
  62             DeleteIORequest((struct IORequest *)InputRequest);
  63         }
  64         DeleteMsgPort(InputPort);
  65     }
  66 }
  67
  68 int ilog2(ULONG data)
  69 {
  70     int bitoffset = 31;
  71     ULONG bitmask = 1 << bitoffset;
  72
  73     do
  74     {
  75         if ((data & bitmask) != 0)
  76             return bitoffset;
  77
  78         bitoffset--;
  79         bitmask >>= 1;
  80     }
  81     while (bitmask != 0);
  82
  83     return 0;
  84 }
  85
  86 LONG ErrorMessageArgs(struct Globals *glob, char *options, CONST_STRPTR format, ...)
  87 {
  88     struct IntuitionBase *IntuitionBase;
  89     LONG answer = 0;
  90
  91     AROS_SLOWSTACKFORMAT_PRE(format);
  92
  93     IntuitionBase =
  94         (struct IntuitionBase *)OpenLibrary("intuition.library", 36);
  95     if (IntuitionBase)
  96     {
  97         struct EasyStruct es =
  98         {
  99             sizeof(struct EasyStruct),
 100             0,
 101             "FAT filesystem",
 102             NULL,
 103             options
 104         };
 105
 106         es.es_TextFormat = format;
 107         answer = EasyRequestArgs(NULL, &es, NULL, AROS_SLOWSTACKFORMAT_ARG(format));
 108         CloseLibrary((struct Library *)IntuitionBase);
 109     }
 110
 111     AROS_SLOWSTACKFORMAT_POST(format);
 112
 113     return answer;
 114 }