[Qt-interest] argv & utf-8 code

[Thiago Macieira]

On Saturday 31. July 2010 11.55.16 Aaron Lewis wrote:
> Hi,
> 	In main() , i've got a simple class w , which has a function
> readFileToBuffer(QString fName).
> 
> Well it's like this:
> 
> In main():
> if(argc > 2){
>  w.readFileToBuffer(QString(*(++argv)));
> }
> 
> And in class codecs:
> 
> void codecs::readFileToBuffer(QString fileName)
> {
>     QFile file(fileName);
>     if (!file.open(QFile::ReadOnly)) {
> //	Hanlder,  Popup a message , telling file can't be opened
>     }
> }
> 
> Handler always fire if UTF-8 string appears , it will fail to open ,
> it's problems with non-ascii strings , anyone could help ?

There are two problems with the code you pasted above:

1) There's no QCoreApplication

2) You're converting from a char* to QString via fromAscii() (the implicit 
constructor), which is *documented* to use Latin1, not UTF-8.

So, please address those two things, by adding the QCoreApplication to your 
main function (or telling us it's there) and by compiling your code with 
QT_NO_CAST_TO_ASCII and QT_NO_CAST_FROM_ASCII. Those two macros will turn into 
errors any use of the implicit conversion to and from char*, which are not 
what you want.

-- 
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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