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 FileMaker Pro Custom Functions

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ChecksumAdler32 ( asciiText )

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  Average rating: 4.5  (31 votes)
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Jeremy Bante, Fugue

Computes an Adler-32 checksum

Sample Input:
ChecksumAdler32 ( "message digest" )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


Computes a 32 bit checksum for a string of text using the Adler-32 algorithm.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


Jeremy: any comments on the relative merits of your version vs Vaughn's?
Vaughn's calc looks way simpler.

Bruce Robertson, Redmond WA
January 06, 2014 11:12am

Mine doesn't require developers to remember the initial values for the two component checksums, or even to acknowledge their existence — This function is more encapsulated.

Jeremy, USA
January 06, 2014 11:57am

Vaughns function is strictly functional - without side-effects and won't use variables outside the scope and canonically tail-recursive.

much faster and could be multi-threaded and used even for rendering on many layout objects in parallel ..

Uli Graser, Miami Beach, FL
June 07, 2017 10:48am

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