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On 2020-07-30 8:09 a.m., Joep Beckeringh via RPG400-L wrote:
Yes, I know. But in the case of ChrUtf the binary value contains 3, while the string exists of 1 character (€) that uses 3 bytes. And the documentation states that %len returns the number of characters.


For UTF-8, %LEN returns the number of bytes. String operations like %SUBST work on bytes too.

For UCS-2, %LEN returns the number of double bytes, and string operations work on double bytes. So you might encounter the same issue with characters that have 4 bytes. But it is much much more rare to encounter this situation for UCS-2 data than for UTF-8 data.

This issue has always existed in RPG for mixed SBCS/DBCS data, where the number of bytes is not necessarily equal to the number of characters.

If RPG does change how it handles string functions, truncation, %LEN etc for data where characters are not all the same size, it will need some new syntax to indicate that it should behave in the new way. Possible a compiler directive, or new built-in functions, or some new parameter for existing built-in functions.

There is not currently any RPG RFE for this.


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