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Zohar

How to XOR a String with 0101010101b?

3 posts in this topic

Hi

 

I need to take a String, and Toggle every second bit of it.

 

What is a simple and clean way to do it in AutoIt?

 

The string can a single char, or a whole paragraph...

 

Thank you

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#2 ·  Posted (edited)

There is no such thing as "every second bit" for a string. An AutoIt string is a sequence of 16-bit Unicode characters, whose codepoints you can get as an array by using StringToArray like this:

Local $s = "This is a sample string."
Local $a = StringToASCIIArray($s)
Local $result
For $c In $a
    $result &= ChrW(BitXOR($c, 0x0155))
Next
MsgBox(0, "Result", $s & @LF & "which becomes" & @LF & $result)

As you can see the fatal issue with such a blind bit toggling is that resulting Unicode characters end up either in exotic alphabet of plain invalid codepoints or codepoint sequences. This is of course more likely to produce errors than some other way to masquerade a string, e.g. by substitution or something.

Edited by jchd

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Hi jchd

I see

OK , thank you..

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