Just to answer my own question, I find that: bytes=[[datastream subdataWithRange:NSMakeRange(positionCounter, datasize)]bytes];
Works perfectly. I should, I know, find out what was going wrong initially - but since I'd rather not have a copy anyway, this really is the all-round better solution. On 26 May 2014, at 15:25, Sandy McGuffog <mcguff...@gmail.com> wrote: > Well, > > I find your code to be a bit confusing, but I’d say that both of those are > wrong. I think that what you need is: > > unsigned char* databuffer = (unsigned char*)malloc(datasize); > [datastream getBytes:databuffer range:NSMakeRange(positionCounter, > datasize)]; // Packet content > > > On May 26, 2014, at 3:44 PM, Pax <45rpmli...@googlemail.com> wrote: > >> Apologies - the obvious important detail, and I missed it out entirely. I >> have tried both of the following with the same result: >> >> unsigned char* databuffer = (unsigned char*)malloc(datasize); >> [datastream getBytes:&databuffer range:NSMakeRange(positionCounter, >> datasize)]; // Packet content >> >> and >> >> unsigned char* bytes; >> [datastream getBytes:&bytes range:NSMakeRange(positionCounter, datasize)]; >> // Packet content >> >> Either way, I get the same result. >> >> >> >> On 26 May 2014, at 14:16, Uli Kusterer <witness.of.teacht...@gmx.net> wrote: >> >>> On 26 May 2014, at 06:02, Pax <45rpmli...@googlemail.com> wrote: >>>> This is my snippet of code: >>>> [datastream getBytes:&bytes >>>> range:NSMakeRange(positionCounter, datasize)]; // Length of packet content >>>> positionCounter+= datasize; >>> >>> What is bytes declared as, and what do you initialize it to? >>> >>> Cheers, >>> -- Uli Kusterer >>> “The Witnesses of TeachText are everywhere...” >>> http://zathras.de >>> >> >> _______________________________________________ >> >> 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: >> https://lists.apple.com/mailman/options/cocoa-dev/mcguffogl%40gmail.com >> >> This email sent to mcguff...@gmail.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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
