CODEWITHSUNDEEP
cobjective-carrays
Demon Kid
Demon Kid

Reputation:

How to pass an array in by reference to a function?

I have a function that has an array pointer passed it to modify stuff in an array:

It's an array of type Byte, but I don't think that I've put the right thing in the round brackets. What should it be instead of (Byte[])? There may be several arrays of different sizes passed to this function

Thanks in advance!

Upvotes: 4

Views: 3828

Answers (2)

Kekoa
Kekoa

Reputation: 28250

It looks like you're using the plain C array. Remember that array pointers are simply pointers to the first element in the array. You don't pass the "whole array" as a reference, you'll just pass the pointer at index 0.

If you're passing the array, you should define your parameter as a pointer, Byte*, because that's what it really is when you pass a simple C array.

Upvotes: 1

Eric Petroelje
Eric Petroelje

Reputation: 60528

if it's a plain-old array, I would just do this:

(void)arrayFunction:(Byte*)targetarray

Or, to be more "OO-ish", use NSData instead of a byte array:

(void)arrayFunction:(NSData*)targetarray

Upvotes: 5

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