How should I declare a long in Objective-C? Is NSInteger appropriate?

Question

I see NSInteger is used quite often and the typedef for it on the iPhone is a long, so technically I could use it when I am expect int(64) values. But should I be more explicit and use something like int64_t or long directly? What would be the downside of just using long?

Answer 1

IIRC, long on the iPhone/ARM is 32 bits. If you want a guaranteed 64-bit integer, you should (indeed) use int64_t.