NAACCR | North American Association of Central Cancer Registries

CRC CHECKSUM Implementation Guide

This document may be used as an implementation guide for the NAACCR standard CRC CHECKSUM. This field will help ensure integrity of NAACCR records when they are transmitted electronically. The CRC CHECKSUM field should be implemented beginning with NAACCR Record Layout Version 7.

Information included on this page should be adequate to allow software vendors to quickly implement the CRC Checksum field. A "C" API has been developed and contributed for public use by Eric Durbin. The API includes the following routines:

• CalcCRC32() - Calculates and returns the CRC32 for a record.
• AssignCRC32() - Assigns (fills in) the CRC CHECKSUM field for a record.
• CompareCRC32() - Compares the CRC CHECKSUM field against the calculated CRC CHECKSUM for a record.

Please refer to the C Implementation file for further details.

Test routines are also included to test the API functions.

• NAACCR Field Definition
• C API Implementation
• C API Implementation Header File
• C Test Program
• Makefile

For further information contact Eric Durbin, Kentucky Cancer Registry, (606)257-4581, E-Mail ericd@delos.kcr.uky.edu

Last Updated: December 15, 1998