wcwidth: provide our own implementation of wcwidth() and wcswidth()

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This commit adds a new script, generate-wcwidth.py, that generates
wcwidth tables from the bundled files (Unicode 14.0):

* DerivedGeneralCategory.txt
* EastAsianWidth.txt

This commit also adds the functions my_wcwidth() and my_wcswidth()
that replaces the system’s wcwidth()+wcswidth(), and uses the
generated tables to map Unicode codepoints to widths.

This is inspired by both XTerm’s wcwidth implementation, as well as
https://github.com/jquast/wcwidth.

Both of those are based on/inspired by
https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c

...

This commit is contained in:

Daniel Eklöf 2022-01-05 21:10:21 +01:00

parent 99ebff5a51

commit c758949145

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