Swift

Decompress Gzip Data In-Place Using BinData

See more Gzip Examples

This example demonstrates how to use the UncompressBd method to decompress Gzip data stored in a BinData object.

The compressed .gz file is first loaded into memory. The UncompressBd method then decompresses the data in-place, meaning the original compressed bytes in the BinData object are replaced with the uncompressed data.

After decompression, the example writes the resulting data to a file. This approach is useful when working entirely in memory before saving or further processing the uncompressed data.

Swift

func chilkatTest() {
    var success: Bool = false

    // This example demonstrates how to decompress Gzip data stored in a BinData object.
    // The decompression is done in-place, replacing the compressed data with the original data.

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

    // Load a .gz file into BinData:
    success = bd.loadFile(path: "example.txt.gz")
    if success == false {
        print("\(bd.lastErrorText!)")
        return
    }

    print("Compressed size (bytes): \(bd.numBytes.intValue)")

    // Uncompress the data in-place:
    success = gzip.uncompressBd(binDat: bd)
    if success == false {
        print("\(gzip.lastErrorText!)")
        return
    }

    print("Decompressed size (bytes): \(bd.numBytes.intValue)")

    // Save the uncompressed data to a file:
    success = bd.writeFile(path: "example.txt")
    if success == false {
        print("\(bd.lastErrorText!)")
        return
    }

    print("File successfully uncompressed to example.txt")

}