man ustrlen () - Tells the number of characters in a string. Allegro game programming library.
NAME
ustrlen - Tells the number of characters in a string. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int ustrlen(const char *s);
DESCRIPTION
This function returns the number of characters in `s'. Note that this doesn't have to equal the string's size in bytes.