Problem with "FileReadLine" and "UCS-2 Little Endian" encoding

[tittoproject]

I'm trying to read the first line of .reg file generated by Regedit in Win XP Sp2.

The code I've used is:

$read = 'test2.reg'
$first_line = FileReadLine($read, 1)
$write = FileOpen('first_line.txt', 2)
FileWriteLine($write, $first_line)
FileClose($write)

The first line of "test2.reg" is: "Windows Registry Editor Version 5.00"

I get a file (first_line.txt) encoded in "UCS-2 Little Endian". Switching to "8-Bit" encoding, the result is: "àµ"

No problems if the .reg file is generated from Win 98 (the first line is "REGEDIT4").

Any hope to solve?

[PsaltyDS]

  tittoproject said:

I'm trying to read the first line of .reg file generated by Regedit in Win XP Sp2.

The code I've used is:

$read = 'test2.reg'
$first_line = FileReadLine($read, 1)
$write = FileOpen('first_line.txt', 2)
FileWriteLine($write, $first_line)
FileClose($write)

The first line of "test2.reg" is: "Windows Registry Editor Version 5.00"

I get a file (first_line.txt) encoded in "UCS-2 Little Endian". Switching to "8-Bit" encoding, the result is: "àµ"

No problems if the .reg file is generated from Win 98 (the first line is "REGEDIT4").

Any hope to solve?

When you say it is "UCS-2 Little Endian", do you mean the first bytes are FF FE?

Byte Order Marks (BOM):

FF FE = UCS-2 (16bit) little endian

FE FF = UCS-2 (16bit) big endian

FF FE 00 00 = UCS-4 (32 bit) little endian

00 00 FE FF = UCS-4 (32 bit) big endian

How did you switch to "8-Bit"?

[Nomad]

That looks like ASCII to me, have you tried converting it?

[Jos]

Try :

RunWait(@Comspec & " /c Type test2.reg > Test2b.reg")

And read the Test2b.reg file to see if that work.....

[CyberSlug]

See http://www.autoitscript.com/forum/index.ph...findpost&p=7061

Are you using

REGEDIT /E pathname "RegPath"

or

REG EXPORT pathname "RegPath"

I wonder if it would make a difference as to whether the output is unicode or ascii....

Edit: JdeB beat me to it....

While I'm editing, I'll add some links:

http://www.ss64.com/nt/regedit.html

and

http://www.microsoft.com/resources/documen...g.mspx?mfr=true

Edited May 30, 2006 by CyberSlug

[tittoproject]

  JdeB said:

Try :

RunWait(@Comspec & " /c Type test2.reg > Test2b.reg")

And read the Test2b.reg file to see if that work.....

Works fine!!!

Thanks a lot to everybody!

[Jos]

  tittoproject said:

Works fine!!!

Thanks a lot to everybody!

Explanation: the Type command will convert a Unicode file to a regular file.

[PsaltyDS]

  JdeB said:

Try :

RunWait(@Comspec & " /c Type test2.reg > Test2b.reg")

And read the Test2b.reg file to see if that work.....

Well, that took all the fun out of it... but I was using it as an excuse to see how Chr() reacted to unicode and played with an exported reg key (SOFTWARE\Mozilla key exported to C:\Temp\Mozilla.reg) since it will be usefull for another project:

expandcollapse popup

; Test reading unicode file
#include<array.au3>
#include<string.au3>

$UniFile = "C:\Temp\Mozilla.reg"

$FileHandle = FileOpen($UniFile, 0)
$FileData = _StringToHex(FileRead($FileHandle))
FileClose($FileHandle)

$BOM4 = StringLeft($FileData, 4)
$BOM8 = StringLeft($FileData, 8)

Select
    Case $BOM8 = "0000FEFF"
        $UniCode = "UCS-4BE 32-bit Unicode - Big Endian"
        $BOM = $BOM8
    Case $BOM8 = "FFFE0000"
        $UniCode = "UCS-4LE 32-bit Unicode - Little Endian"
        $BOM = $BOM8
    Case $BOM4 = "FEFF"
        $UniCode = "UCS-2BE 16-bit Unicode - Big Endian"
        $BOM = $BOM4
    Case $BOM4 = "FFFE"
        $UniCode = "UCS-2LE 16-bit Unicode - Little Endian"
        $BOM = $BOM4
    Case Else
        MsgBox(64, "Unicode Test", "Unicode type unidentified!  First 8 hex characters = " & $BOM8)
        Exit
EndSelect
$BomLen = StringLen($BOM)   
$WorkingHex = StringTrimLeft($FileData, $BomLen)
$HexLen = StringLen($WorkingHex)
$CharLen = $HexLen / $BomLen

MsgBox(64, "Unicode Test", "First " & $BomLen & " hex characters = " & $BOM & " = " & $UniCode & @CRLF & @CRLF & _
        "This file is " & $HexLen & " hex characters long (minus the BOM), which is " & $CharLen & " Unicode characters.")

$WorkingHex = StringLeft($WorkingHex, 32 * $BomLen)
Dim $UniArray[1] = [0]
For $n = 1 To 32
    _ArrayAdd($UniArray, StringLeft($WorkingHex, $BomLen))
    $WorkingHex = StringTrimLeft($WorkingHex, $BomLen)
Next
$UniArray[0] = UBound($UniArray) - 1

_ArrayDisplay($UniArray, "First 32 hex char")

If StringInStr($UniCode, "Little") Then
    For $n = 1 To $UniArray[0]
        $NewChar = ""
        For $c = ($BomLen - 1) To 1 Step -2
            $NewChar = $NewChar & StringMid($UniArray[$n], $c, 2)
        Next
        $UniArray[$n] = $NewChar
    Next
    _ArrayDisplay($UniArray, "Endian Converted")
EndIf

For $n = 1 To $UniArray[0]
    $UniArray[$n] = Chr("0x" & $UniArray[$n])
Next
_ArrayDisplay($UniArray, "ASCII Converted")

Not needed, but I learned something from it...

P.S. I didn't make clear above: Chr() does not like unicode at all, hence the conversion in my script...

Edited May 30, 2006 by PsaltyDS

[tittoproject]

Here a little function that converts a .reg file from Regedit5 format to Regedit4 format.

It uses the "type" command to convert Unicode to 8 Bit, and then replaces the first string from "Windows Registry Editor Version 5.00" to "REGEDIT4".

Func _REGEDIT4($regfile5)
    Local $regfile4, $tempdir, $write, $read, $l, $line
    If FileReadLine($regfile5, 1) <> 'REGEDIT4' Then
        $tempdir = @TempDir & '\Regedit4'
        $regfile4 = $tempdir & '\regedit4.reg'
        DirCreate($tempdir)
        RunWait(@ComSpec & ' /c type "' & $regfile5 & '" > "' & $regfile4 & '"', '', @SW_HIDE)
        $write = FileOpen($regfile5, 2)
        $read = FileOpen($regfile4, 0)
        FileWriteLine($write, 'REGEDIT4')
        $l = 2
        While 1
            $line = FileReadLine($read, $l)
            If @error = -1 Then ExitLoop
            FileWriteLine($write, $line)
            $l = $l + 1
        WEnd
        FileClose($write)
        FileClose($read)
        DirRemove($tempdir, 1)
    EndIf
EndFunc

It seems working...

A little doubt: does the "type" command work on Win 98?

Edited May 31, 2006 by tittoproject