DllStruct Dev

[Ejoc]

I'm not sure how I would do it using UDFs since the FileRead and FileWrite are dealing with text files. I know I could whip up a dll to handle it. Oh well maybe I'll get a good idea on the subject.

[layer]

How bout modifying FileWrite/Read in the source code of autoit with whatever idea you had to edit binaries or whatever... And add like maybe an optional paremeter to specify if it's binary, or anything else? Does this make sense...?

[Ejoc]

Ah, Microsoft already wrote the read/write functions for me, so I can just make a UDF.

[Ejoc]

How would we modify binary data? I suppose creatively using DLLStructCreate to handle pointer info... hmmm

In particular, for example, I am wondering how we would edit the "exif" info of a JPEG file?

Lar.

<{POST_SNAPBACK}>

I'm 1/2 way done, I have the read working. So right now it will read the file and create a DllStruct that is:

DllStructCreate("byte[" & FileGetSize() & "];int"); where the int is the bytes read

So you could

1) Modify byte by byte with DllStructSetData($p,1,$newByte,$ByteNumber)

2) If you know a struct at a certain location in the file, ie there is a jpeg header you could after reading the file do a $header = DLLStructCreate("int;int",DllStructGetPtr($p) + $offsettoheader)

[Ejoc]

Added 2 new UDF's to DllStruct.au3

_FileReadToDllStruct($szFileName)

_FileWriteFromDllStruct($p,$szFileName)

See post #1

An example:

expandcollapse popup

#cs
vi:ts=4 sw=4:
Example, displays first 4k of a binary file in hex
Ejoc
#ce
#include <GUIConstants.au3>
#include <DllStruct.au3>

GUICreate("HexView",400,400)
$hBrowse    = GUICtrlCreateButton("Browse",200,3)
$hEdit      = GUICtrlCreateEdit("",0,30,400,370)
GUICtrlSetFont(-1,9,400,0,"Lucida Console")
GUISetState()

while 1
    $msg    = GUIGetMsg()

    Select
        case $msg = $GUI_EVENT_CLOSE
            ExitLoop
        case $msg = $hBrowse
            $file   = FileOpenDialog("Open File","","ALL (*.*)",1)
            If Not @Error Then
                $p  = _FileReadToDllStruct($file)
                If @error Then
                    MsgBox(0,"error","Read Failed")
                    exit
                EndIf

                $s  = ""
                $iLen   = DllStructGetData($p,2)

                If $iLen > 4096 Then $iLen = 4096
                for $i = 1 To $iLen
                    $s &= HEX(DllStructGetData($p,1,$i),2) & " "
                    If NOT MOD($i,8) Then $s &= "  "
                    If NOT MOD($i,16) Then $s &= @CRLF
                Next
                GUICtrlSetData($hEdit,$s)
                DllStructDelete($p)
            EndIf
    EndSelect
wend

Edited May 12, 2005 by Ejoc

[jpm]

Added 2 new UDF's to DllStruct.au3

_FileReadToStruct($szFileName)

_StructWriteToFile($p,$szFileName)

See post #1

An example:

expandcollapse popup

#cs
vi:ts=4 sw=4:
Example, displays first 4k of a binary file in hex
Ejoc
#ce
#include <GUIConstants.au3>
#include <DllStruct.au3>

GUICreate("HexView",400,400)
$hBrowse    = GUICtrlCreateButton("Browse",200,3)
$hEdit        = GUICtrlCreateEdit("",0,30,400,370)
GUICtrlSetFont(-1,9,400,0,"Lucida Console")
GUISetState()

while 1
    $msg    = GUIGetMsg()

    Select
        case $msg = $GUI_EVENT_CLOSE
            ExitLoop
        case $msg = $hBrowse
            $file    = FileOpenDialog("Open File","","ALL (*.*)",1)
            If Not @Error Then
                $p    = _FileReadToStruct($file)
                If @error Then
                    MsgBox(0,"error","Read Failed")
                    exit
                EndIf

                $s    = ""
                $iLen    = DllStructGetData($p,2)

                If $iLen > 4096 Then $iLen = 4096
                for $i = 1 To $iLen
                    $s &= HEX(DllStructGetData($p,1,$i),2) & " "
                    If NOT MOD($i,8) Then $s &= "  "
                    If NOT MOD($i,16) Then $s &= @CRLF
                Next
                GUICtrlSetData($hEdit,$s)
                DllStructDelete($p)
            EndIf
    EndSelect
wend

<{POST_SNAPBACK}>

Very good

Better _FileReadToDLLStruct and _FileWriteFromDLLStruct

[layer]

I always wanted to create a Hex Editor (Seriously though, lol)

[Ejoc]

Very good

Better  _FileReadToDLLStruct and _FileWriteFromDLLStruct

<{POST_SNAPBACK}>

Done

[Ejoc]

Added 2 new functions, needed for Crypto.AU3 http://www.autoitscript.com/forum/index.php?showtopic=11513

Added _DllStructCreateFromString() Creat a struct that is a copy of a string

Added _GetLastErrorMessage() String containing system error message

Edited May 16, 2005 by Ejoc

[Psibernetic]

it isnt working for me.... error at line 132 with the _

[SmOke_N]

This thread is near 20 months old. There have been many versions (of AutoIt) in those 20 months. If you know anything about continuation of a line with '_' you'll know that with the latest versions you must have a space ' _' after the last character and before the underscore of that line.

Edited January 16, 2007 by SmOke_N