al_ustr_size - Man Page

#include <allegro5/allegro.h>

size_t al_ustr_size(const ALLEGRO_USTR *us)

Return the size of the string in bytes. This is equal to the number of code points in the string if the string is empty or contains only 7-bit ASCII characters.

al_ustr_length(3)

al_ustr_length(3), al_ustr_size_utf16(3).