You should, I believe, be able to include <tgmath.h> ('type generic math' - a C99 addition) instead, and then just 'use' the non-suffixed versions of the functions. Hidden macro magic is supposed to then make the compiler call the double or float versions as appropriate for the type used.
Having said that, I had a lot of trouble when trying this in my iPhone app a year or so ago. Things seemed very slow when complied, and disassembly showed all sorts of float<->double conversion going on. I ended up explicitly calling the f-suffixed ones anyway. I don't think I should have needed to though, and if there was a bug back then (rather than just me doing something incorrect) it could be fixed now. Jamie. On 10 Aug 2010, at 15:04, steven Hooley wrote: > Sorry, 'safe' was a bad choice. I do care because i have compiler > warnings. I have started defining macros for each function and thought > i better check that they didn't already exist. > Thankyou > > On 10 August 2010 14:54, Alastair Houghton <alast...@alastairs-place.net> > wrote: >> On 10 Aug 2010, at 13:42, steven Hooley wrote: >> >>> Is there a preferred way to use the Math.h functions with CGFloats >>> that is 32 and 64 bit safe? >> >> Why would they be unsafe? (They aren't.) >> >> It's possible that using the double versions (the ones without the "f" >> suffix) is inefficient in 32-bit mode, but in practice you're very unlikely >> to notice. If you particularly cared, you could #define some macros for >> them, but I doubt it's worthwhile unless you're going to do some heavy-duty >> geometry (and in that case, you might find that you want to use double >> anyway, for accuracy). >> >> BTW, <math.h> isn't capitalised; please don't use random upper-case letters >> when including header files... it causes grief if your source code is ever >> moved somewhere case-sensitive. >> >>> Should i even be using Math.h functions in Cocoa? >> >> Why should you not? >> >> Kind regards, >> >> Alastair. > _______________________________________________ > > 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/jamie%40montgomerie.net > > This email sent to ja...@montgomerie.net _______________________________________________ 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