Swift

Compress Text from StringBuilder to Gzip (BinData Output)

See more Gzip Examples

This example demonstrates how to use the CompressSb method to compress text stored in a StringBuilder into Gzip format.

The text is first converted to its byte representation using the specified character set (in this case, UTF-8). These bytes are then compressed, and the resulting Gzip data is written to a BinData object in memory.

This approach is useful when working with dynamically generated text that you want to compress without first writing it to a file. The example also shows how the compressed data can optionally be saved to a .gz file.

Swift

func chilkatTest() {
    var success: Bool = false

    // This example demonstrates how to compress text contained in a StringBuilder
    // into Gzip format, storing the compressed result in a BinData object.

    let gzip = CkoGzip()!
    let sb = CkoStringBuilder()!
    let bd = CkoBinData()!

    // Add some text to the StringBuilder:
    sb.append(value: "The quick brown fox jumps over the lazy dog.")

    // Compress the text using UTF-8 encoding:
    success = gzip.compressSb(sb: sb, charset: "utf-8", bd: bd)
    if success == false {
        print("\(gzip.lastErrorText!)")
        return
    }

    // The BinData now contains the Gzip-compressed bytes.
    print("Compression successful.")
    print("Compressed size (bytes): \(bd.numBytes.intValue)")

    // (Optional) Save to a .gz file:
    success = bd.writeFile(path: "text.gz")
    if success == false {
        print("\(bd.lastErrorText!)")
        return
    }

    print("Gzip file written to text.gz")

}