base10_to_base64 ( integer )

Converts base 10 integer to base 64 alphanumeric character

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Martin Sorich
FMBiotech
http://www.fmbiotech.com

Sample input:

base10_to_base64( 3905 )

Sample output:

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

// Converts integer base 10 to base 64 alphanum
// Martin Sorich 2009 nov 10

Let(  [
         string = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-." ;
         start1 = Int ( integer / 64 ) + 1 ;
         start2 = Mod ( integer ; 64 ) +1
];

Case ( 
          integer ≥ 0 and integer < 4096 ;  // limits
          Middle( string ; start1 ; 1 )  &  Middle( string ;  start2  ; 1 ) ;
          ""  


) // end Case


) // end Let

An example of the use of this custom function is to allow you to pass extended encoded data to the Google Charts API. It lets you specify integer values from 0—4095, inclusive, encoded by two alphanumeric characters.

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base10_to_base64 ( integer )

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