(Swift 3,4,5...) MIME Header Q and B Encoding and Decoding

Demonstrates how to Q and B encode/decode.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let sb = CkoStringBuilder()!
    var success: Bool

    sb.append("This is a test")

    print("\(sb.getEncoded("B", charset: "utf-8")!)")
    // output is:
    // =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=

    print("\(sb.getEncoded("Q", charset: "iso-8859-1")!)")
    // output is:
    // =?utf-8?Q?This_is_a_test?=

    let sb2 = CkoStringBuilder()!

    sb2.append("=?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=")
    sb2.decode("B", charset: "utf-8")
    print("\(sb2.getAsString()!)")

    // output is:
    // This is a test

    sb2.clear()
    sb2.append("=?utf-8?Q?This_is_a_test?=")
    sb2.decode("Q", charset: "utf-8")
    print("\(sb2.getAsString()!)")

    // output is:
    // This is a test

    // "B" or "Q" will decode both B and Q.
    sb2.clear()
    sb2.append("=?utf-8?Q?This_is_a_test?= 123 =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=")
    sb2.decode("Q", charset: "utf-8")
    print("\(sb2.getAsString()!)")

    // output is:
    // This is a test 123 This is a test

}