Ultra-fast CRC-32 calculation library for Rapid-Q
Copyright (c) 2002 Pavel "EvilOne" Minayev

This is a Rapid-Q library (include file) that provides
functions to calculate CRC-32 of an arbitrary block of
memory, and of string. The core of the library is written
in assembler and thus is significantly faster than any
algorithm that could be implemented in Rapid-Q. No external
files are needed, the machine code is embedded into your
executable using my ASM-in-RQ technique.

To use it in your program, first make sure that CRC32.BIN
is the directory from where you call the compiler. Then,
just use $INCLUDE to load the CRC32.INC file into your
program.

The library contains two public functions:

   FUNCTION CRC32(Pointer AS LONG, Size AS LONG) AS LONG
   FUNCTION STRCRC32(Str AS STRING) AS LONG

The first one calculates CRC-32 of a block of memory
located at Pointer, of Size bytes and returns the result.
The second calculates CRC-32 of the string passed as an
argument, and is just a convenient wrapper around the
first. Note that both functions return LONG (Windows
version doesn't support DWORD), however, the bit-pattern
is exactly the same, since the algorithm works with
unsigned integers internally.

For a sample program, see CRCTEST.RQ. Source code is in
CRC32.INC and CRC32.ASM.