Allegro 5 api
#include <allegro5/allegro.h> bool al_make_path_canonical(ALLEGRO_PATH *path)
Removes any leading \[aq]..\[aq] directory components in absolute paths. Removes all \[aq].\[aq] directory components.
Note that this does not collapse "x/../y" sections into "y". This is by design. If "/foo" on your system is a symlink to "/bar/baz", then "/foo/../quux" is actually "/bar/quux", not "/quux" as a naive removal of ".." components would give you.