DOKK / manpages / debian 10 / allegro5-doc / al_utf16_width.3alleg5.en
al_utf16_width(3alleg5) al_utf16_width(3alleg5)

al_utf16_width - Allegro 5 API

#include <allegro5/allegro.h>
size_t al_utf16_width(int c)
    

Returns the number of bytes that would be occupied by the specified code point when encoded in UTF-16. This is either 2 or 4 bytes for legal code point values. Otherwise returns 0.

al_utf16_encode(3alleg5), al_utf8_width(3alleg5)

Allegro reference manual