QString to unsigned char *

[marcel]

There is one gotcha with the code above!
The call to toAscii() creates a temporary QByteArray which goes out of scope when used like this:

char *sequence = string.toAscii().constData();
// sequence is now a dangling pointer!

char *sequence = string.toAscii().constData();
// sequence is now a dangling pointer!

To copy to clipboard, switch view to plain text mode 

a call like

qstrdup(str.toAscii().constData());

qstrdup(str.toAscii().constData());

To copy to clipboard, switch view to plain text mode 

will work, though, since the the pointer isn't accessed after the QByteArray goes out of scope.
[/code]

Correct, of course.
I just wrote the code here, didn't tested it anywhere.

I think it was easy to spot in a program because probably a memory violation would have been raised as soon as the pointer was read the first time.

Regards

[comlink21]

try the following un-tested code;

QString str ="ABCDEFGHIJK";
unsigned char* uca;

uca = new unsigned char[str.length()];
for(int i=0; i<str.length(); i++) uca[i] = str.substr(i,1);

cout<<uca<<endl;

delete [] uca;

comlink21

[marcel]

try the following un-tested code;

QString str ="ABCDEFGHIJK";
unsigned char* uca;

uca = new unsigned char[str.length()];
for(int i=0; i<str.length(); i++) uca[i] = str.substr(i,1);

cout<<uca<<endl;

delete [] uca;

comlink21

What is your point?