QString to Unicode to char*

Hi all,
I want to be able to convert my QString in unicode format and the convert it in char*.

I have try with the following code but I have a casting problem (my QByteArray contains only the first character).

Code:

---

QByteArray xByteArray((const char *)qsTmp.unicode(), qsTmp.size()*2);

---

Any Suggestions?

with regards, Dax

Let's see:

Quote:

---

Originally Posted by the documentation

The QString class provides a Unicode character string

---

That's already taken care of.

Now, to turn it into a char pointer:

Code:

---

QString myString("Hello world");
 
char *myStringChars = myString.toUtf8().data();

---

Thankyou tbscope,
are you sure that this code work correctly? My debugger (VS2005) show me bad characters in myStringChars but I don't know if is a format-code problem.

You mean you actually have a unicode string?
Yes, that's correct.

Understand what a unicode string is.

Quote:

---

Originally Posted by tbscope

Now, to turn it into a char pointer:

Code:

---

QString myString("Hello world");
char *myStringChars = myString.toUtf8().data();

---

---

That's likely to end in tears. QString::toUtf8() returns a temporary QByteArray, data() returns a pointer to its data buffer, and then the temporary QByteArray ceases to exist. Ultimately, you get a char* to a buffer inside a temporary object that no longer exists and can therefore be overwritten by other machine processes.

You need to control the scope of the QByteArray:

Code:

---

QByteArray ba = myString.toUtf8();
char *myStringChars = ba.data();
// do stuff with myStringChars
// let ba go out of scope

---

Yes, now I remember it :-)
I knew there was something wrong with it.

Ok, thanks :)

Consider using the qPrintable macro.