Problem Statement

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:

Let's start with the solution:

string foo = "The quick brown fox jumps over the lazy dog";
write("0x%x\n", Gz.crc32(foo));