(Swift 3,4,5...) Compress String Feed to Base64

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64.

The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.

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

func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var success: Bool
    let sbCompressedBase64 = CkoStringBuilder()!

    let compress = CkoCompression()!
    compress.algorithm = "deflate"
    compress.charset = "utf-8"
    compress.encodingMode = "base64"

    let sbIndex = CkoStringBuilder()!

    var i: Int
    for i = 0; i <= 24; i++ {
        // Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
        // an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
        // in a subsequent call.
        sbIndex.clear()
        sbIndex.appendInt(i)
        if i == 0 {
            sbCompressedBase64.append(compress.beginCompressStringENC(sbIndex.getAsString()))
        }
        else {
            sbCompressedBase64.append(compress.moreCompressStringENC(sbIndex.getAsString()))
        }

        sbCompressedBase64.append(compress.moreCompressStringENC(": This is a line of data to be compressed...\r\n"))
    }

    // Flush any remaining output.
    sbCompressedBase64.append(compress.endCompressStringENC())

    print("The base64 encoded compressed text:")
    print("\(sbCompressedBase64.getAsString()!)")

    // Now decompress in one call:
    var originalText: String? = compress.decompressStringENC(sbCompressedBase64.getAsString())
    print("\(originalText!)")

}