Another possibility. Since you're asking to instantiate the string with NSASCIIStringEncoding, the method could return nil when it fails to convert the pBuffer contents (i.e. non-ASCII bytes above 0x7F).
That would lead to trigger exception raises at the line immediately following. That might've been confusing your memory management somewhere else. Aki On 2009/11/11, at 12:52, Greg Parker wrote: > On Nov 11, 2009, at 11:58 AM, Hank Heijink (Mailinglists) wrote: >> So, I'm curious about how -[NSString initWithCString:encoding:] works. >> According to the documentation, it returns "An NSString object initialized >> using the characters from nullTerminatedCString." Does that mean it doesn't >> copy the bytes? Then what does it do? -[NSString initWithUTF8String] >> explicitly states that it returns "An NSString object initialized by copying >> the bytes from bytes." > > -initWithCString:encoding: should copy the bytes. You can verify that > yourself with a small test: > > char buf[10+1] = "0123456789"; > NSString *s = [[NSString alloc] initWithCString:buf > encoding:NSASCIIStringEncoding]; > NSLog(@"before %@", s); > memset(buf, 'x', 10); > NSLog(@"after %@", s); > > If the bytes were not copied then `before` and `after` would differ. > > I don't see any memory errors in your code. My next suspect would be memory > errors in getMetadata() or getLengthOfMetadata(). Try replacing > getLengthOfMetadata(...) with pcLength=10, and/or getMetadata(...) with > memset(pBuffer, 'x', pcLength). If one of those changes makes the crash go > away then those two functions look much more suspicious. > > > -- > Greg Parker gpar...@apple.com Runtime Wrangler > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/aki%40apple.com > > This email sent to a...@apple.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
