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lenb ( str ; idx ; lenOfNotASCII )

String length calculation function. For any non ASC II characters, can be counted as 2 or 3 bytes.

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leinven - Show more from this author

Sample input:

lenb ("1234567890一二三四五"; 1; 2)

Sample output:

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

If(idx ≥ 1 and idx ≤ Length(str);
	Let(
		b = Middle(str; idx; 1);
		Case(
			Code(b)>255;	lenOfNotASCII;
			1
		)+lenb(str; idx+1; lenOfNotASCII)
	);
	0
)

For ASC II character, count as 1; for others (code > 255), count as you specified. Normally one special character will take 2~3 bytes instead of 1.
Use this function to calculate how may bytes will take if you export string text out from FileMaker to other databases.

Comments

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