How can I pass a Swift string to a function c?

Question

I am having serious problems passing a string from swift to a function written with c.

I am trying to do this in my swift code

var address = "192.168.1.2"
var port = 8888

initSocket(address, port)

The c function looks like this:

void initSocket(char *address, int port);

Im getting the error: Cannot convert expression of type "Void" to type "CMutablePointer"

I cannot find a solution that works.

+3

c xcode swift

Mads Gadeberg 19 Aug '14 at 8:35

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1 answer

Wojtek Surowka · Accepted Answer · 2014-08-19T08:52:05+0000

Swift CStrings works with constant C strings, so use

void initSocket(const char *address, int port);

instead of an argument char*

and declare the variable address

as CString:

var address: CString = "192.168.1.2";