[Qt-interest] howto convert QString to char*

[Thiago Macieira]

On Tuesday 13. July 2010 20.23.03 BRM wrote:
> ----- Original Message ----
> 
> > > Interesting; however, that has never seemed to work for me -
> > > I  usually get
> > > compilation issues; so I typically just do:
> > > QString qtString = "someString";
> > > std::string stdCString =  qtString.toStdString();
> > > char* charPtr = stdCString.data();
> > > //  charPtr is only good while stdCString (i) doesn't change,
> > > and (ii)  remains in
> > > scope
> > 
> > That's odd.  I  usually use c_str().  c_str() adds a terminating \0 at
> > the end, but  data() does not.  At least that's what Stroustrup says in
> > Section 20.3.7  of _The C++ Programming Language_.  Usually when I want
> > to print a char  const *, I want that \0.
> 
> Yeah, my bad there - you are correct; probably get other code that got me
> thinking of data() instead of c_str().
> c_str() is the safer one, and is what I do use.

Use QByteArray. The NUL is always there, it's implicit.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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