[QScintilla] Strings with \0 charaters in it?

Phil Thompson phil at riverbankcomputing.com
Tue Apr 25 22:08:32 BST 2017


On 25 Apr 2017, at 7:06 pm, Matic Kukovec <kukovecmatic at hotmail.com> wrote:
> 
> >  On 25 Apr 2017, at 6:16 pm, Matic Kukovec <kukovecmatic at hotmail.com> wrote:
> >  > 
> >  >  
> >  > >  On 25 Apr 2017, at 5:08 pm, Matic Kukovec <kukovecmatic at hotmail.com> wrote:
> >  > >  > 
> >  > >  > Hi guys,
> >  > >  > 
> >  > >  > I just noticed that when adding strings that contain null characters ('\0') using the setText method,
> >  > >  > QScintilla cuts off the string at the first null character it finds. To be sure I opened the same text saved
> >  > >  > to a file with Notepad++ and SciTE and there the null characters appear.
> >  > >  > 
> >  > >  > Is this a bug or should strings with null characters be handled differently?
> >  > >  > I used this example to for testing:
> >  > >  > qscieditor.setText("Test\nText\nIn\n\0An\nQscintilla\nEditor")
> >  > >  
> >  > >  Is that C++ or Python?
> >  > >  
> >  > >  setText() uses the low-level Scintilla SCI_SETTEXT which accepts a '\0' string, ie. you will get the same result if you used Scintilla.
> >  > >  
> >  > >  Phil
> >  > 
> >  > Hi Phil,
> >  > 
> >  > I'm using Python3 and before I tried setText and now I tried as you suggested:
> >  > qscieditor.SendScintilla(SCI_SETTEXT, bytes("Test\nText\nIn\n\0An\nQscintilla\nEditor", encoding="ascii"))
> >  > and I get the same result.
> >  > I looked into the C++ setText method and it uses this line:
> >  > SendScintilla(SCI_SETTEXT, ScintillaBytesConstData(textAsBytes(text)));
> >  > Is there maybe an error in how the ScintillaBytesConstData or textAsBytes convert the text?
> >  > I'm only guessing here.
> >  
> >  You misunderstand. I was saying that the behaviour you see is the way Scintilla works.
> >  
> >  Phil
> 
> Are you sure? 
> Then how do SciTE and Notepad++ do this without cutting off at the first '\0' character as they also use Scintilla?

You'd have to look at the SciTE source code. Maybe...

http://www.scintilla.org/ScintillaDoc.html#BackgroundLoadSave

Phil


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