uwidth  -  Low  level  helper  function  for testing Unicode text data.
       Allegro game programming library.
       #include <allegro.h>
       int uwidth(const char *s);
       Low level helper function for testing Unicode text data.
       Returns the number of bytes occupied by  the  first  character  of  the
       specified string, in the current encoding format.
       uwidth_max(3alleg),    ugetc(3alleg),   ugetx(3alleg),   usetc(3alleg),
       ucwidth(3alleg), uisok(3alleg)