

Task

Demonstrate a method of deriving the Cyclic Redundancy Check from within the language.



The result should be in accordance with ISO 3309, ITU-T V.42, Gzip and PNG.

Algorithms are described on Computation of CRC in Wikipedia.
This variant of CRC-32 uses LSB-first order, sets the initial CRC to FFFFFFFF16, and complements the final CRC.

For the purpose of this task, generate a CRC-32 checksum for the ASCII encoded string:

 The quick brown fox jumps over the lazy dog


// version 1.0.6
 
import java.util.zip.CRC32
 
fun main(args: Array<String>) {
    val text = "The quick brown fox jumps over the lazy dog"
    val crc = CRC32()
    with (crc) {
        update(text.toByteArray())
        println("The CRC-32 checksum of '$text' = ${"%x".format(value)}")
    }
}