How to define char array in Swift language

Question

Here is my C code in an Objective-C method

char addressBuffer[100];

But how to define this char in Swift language?

I try something like this but this doesn't work:

var addressBuffer : CChar(100)

Here is the documentation https://developer.apple.com/library/prerelease/ios/documentation/swift/conceptual/buildingcocoaapps/InteractingWithCAPIs.html

Answer 1

that is the way to get a nice unicode character array in Swfit:

var charArray: Array<Character> = Array(count: 100, repeatedValue: "?")

if fills your array with 100 question marks, initially.

update

with CChar, for instance:

var charArray: Array<CChar> = Array(count: 100, repeatedValue: 32) // 32 is the ascii space

Answer 2

This Swift code seems to allocate something usable as a C char array of size 100 (for C interoperation needs):

var addressBuffer = [Int8](count: 100, repeatedValue: 0)

// test it
addressBuffer[0] = 65 // 'A'
addressBuffer.withUnsafePointerToElements() { (addrBuffPtr : UnsafePointer<CChar>) -> () in
      // use pointer to memory
      var x0 = addrBuffPtr.memory
      println("The ASCII value at index 0 is \(x0)")

      var myCOpaquePointer = COpaquePointer(addrBuffPtr)
      // use C pointer for interoperation calls
}