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Encr_Checksum |
Sum of the ASCII values of the characters modulo 1024. ALL characters are counted, also non-printing characters like spaces and returns.
Syntax
Encr_Checksum ( switches ; text )
Parameters
| switches | reserved for future use, leave empty or set to "-Unused" |
| text | the text to calculate the checksum of |
Returned Result
Data type returned
Number
Result
a number
Originated in
Troi Encryptor Plug-in 1.2
Compatibility
FileMaker Pro 16 to FileMaker Pro 2023
Considerations
A checksum might be the same for 2 different texts. The chance on this is normally quite low (one in 1024).
See also the Encr_MakeDigest function for a more robust check if text is the same.
Compatibility with Troi Coding Plug-in:
Text is converted to the FileMaker Pro 6 character set. For other characters the UNICODE value sum modulo 1024 is used. This ensures that fields with data from older FileMaker 6 databases will have the same checksum.
Example
Set Field [ result ; Encr_Checksum ( "-Unused" ; "Hello world." ) ]will give a result of 106.
You can use this function to see if the contents of a field has changed. You store the checksum and then later compare it to the current checksum.
Used in example file
CheckSignature.fmp12
Related function
| Encr_MakeDigest |
Related topics
Troi Encryptor Plug-in online help (overview)