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Re: Feeding NSUnarchiver bad data can cause crash

Douglas,

On 3.6.2004, at 17:10, Douglas A. Welton wrote:

> implementing your own. Something like this should work...

Not using the return statements this way:

> - (BOOL)canBeUnarchived: (NSData *)Target_Data
> {
> id Archive;
> NS_DURING
> Archive = [NSUarchiver unarchiveObjectWithData: Target_Data]
> return YES;
> NS_HANDLER
> return NO;
> NS_ENDHANDLER
> }
>
> ... note the standard disclaimers apply.

Especially, don't ever use return inside of NS_... blocks. Either go
@try, or use NS_VALUERETURN (or whatever it is called, I can't recall
the very now), or--the best way IMHO--store the result into a variable:

BOOL okay=NO;
NS_DURING
...
okay=YES;
NS_HANDLER ... NS_ENDHANDLER
return okay;
---
Ondra Hada
OCSoftware: email@hidden http://www.ocs.cz
private email@hidden http://www.ocs.cz/oc

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References: 
 >Re: Feeding NSUnarchiver bad data can cause crash (From: "Douglas A. Welton" <email@hidden>)



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