This package provides an implementation of the CRC32 (Cyclic Redundancy Check 32) checksum algorithm in Emacs Lisp. CRC32 is commonly used for detecting errors in data transmission or storage.

• Calculates CRC32 checksum for any string input
• Uses a precomputed lookup table for efficient calculation
• Pure Emacs Lisp implementation
• Customizable output format (decimal or hexadecimal)

1. Save the file as crc32.el
2. Load it in Emacs:

   (add-to-list 'load-path "/path/to/crc32")
   (require 'crc32)  
       

Calculate a CRC32 checksum:

(crc32 "Hello World")
;; Returns the CRC32 checksum as a string

• crc32-output-format: Choose between ‘decimal or ‘hexadecimal output
  • Use M-x customize-variable RET crc32-output-format RET to set interactively

• crc32: Main function to compute CRC32 checksum
• make-crc32-table: Internal function to generate the CRC32 lookup table