al_create_path - Allegro 5 API

       Create  a  path  structure from a string.  The last component, if it is followed by a directory separator
       and is neither “.” nor “..”, is treated as the last directory name  in  the  path.   Otherwise  the  last
       component is treated as the filename.  The string may be NULL for an empty path.

       al_create_path - Allegro 5 API

al_create_path_for_directory(3alleg5), al_destroy_path(3alleg5)

Allegro reference manual                                                                 al_create_path(3alleg5)

              #include <allegro5/allegro.h>

              ALLEGRO_PATH *al_create_path(const char *str)