Hi Ron. Not sure if you just want to have an array of Strings, and are working entirely in Swift. If so, you can just do
func haveSwiftFun(data :[String]?) { for string in data { print(string) } } If you’re looking to interface Swift with a C function that takes const char * const *, that is covered in this thread: https://lists.swift.org/pipermail/swift-users/Week-of-Mon-20160815/002956.html <https://lists.swift.org/pipermail/swift-users/Week-of-Mon-20160815/002956.html> -Kenny > On Sep 19, 2016, at 12:19, Ron Olson via swift-users <swift-users@swift.org> > wrote: > > Hi all- > > So I've been working on this for hours and I'm just stuck. In C I'd write > something like: > > const char* a_string_array[] = {"aloha", "world", "from beautiful Waikiki > Beach"}; > haveFun(a_string_array); > > and haveFun is: > > void haveFun(const char** data) { > printf("%s\n", data[0]); > printf("%s\n", data[1]); > printf("%s\n", data[2]); > } > > So I'm trying to do something similar in Swift 3-REL (working in Linux) and > the best I've been able to come up with is: > > func haveSwiftFun(data: > Optional<UnsafeMutablePointer<Optional<UnsafePointer<Int8>>>>, count:UInt32) { > for _ in 0...count { > if let parm = params?.pointee! { > let tempBuf = String(cString: (UnsafePointer<Int8>(parm)!)) > print(tempBuf) > } > } > } > > But I'm not actually iterating through the array, I'm just getting the first > element count times. > > I've been all over the usual places on the web (SO, Apple Docs, etc.), and > have cobbled together something like: > > let buffer = UnsafeBufferPointer(start:(params?.pointee!)!, count:count) > let anArray = Array(buffer) > > which gives me an [Int8], but I can't figure out how to get the actual char > array from the anArray elements, with the hope of turning each element into > its own String. > > I'm feeling I've run off the rails here and am hoping somebody might have > some info on how to properly deal with working with a const char** in Swift > 3. I'm sure/not sure it'll be an obvious 'ah ha!' moment, but that moment > seems very very far away. :( > > Thanks for any help, > > Ron > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users
_______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users