Why no non-latin TODIGIT mappings in UTF-8.src ?

Hello all,

I'm a bit surprised there are no TODIGIT mappings for non-latin scripts
in src/share/mklocale/UTF-8. Is there a technical reason why this would
be a bad idea or is it simply because noone did get around to define the
mappings yet?

Looking at am_ET.UTF-8.src, the mappings are defined using the UTF-8
encoding for the digit signs in their respective script and mapping
them to their numeric value.
So, e.g. for arabic the TODIGIT mappings would be

/* Arabic-Indic digits 0 - 9 */
TODIGIT         <0xd9a0 - 0xd9a9 : 0>

/* Extended Arabic-Indic digits 0 - 9 */
TODIGIT         <0xdbb0 - 0xdbb9 : 0>

By the way, the TODIGIT mapping in am_ET.UTF-8.src appears to be off by one,
as the Ethiopic digit 1 is 0x1369 in UCS-2, which maps to 0xe18da9 in UTF-8
while in am_ET.UTF-8.src it says 0xe18da8.

Wolfgang
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