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al_replace_path_component - Allegro 5 API
#include <allegro5/allegro.h> void al_replace_path_component(ALLEGRO_PATH *path, int i, const char *s)
Replace the i'th directory component by another string. If the index is negative then count from the right, i.e. -1 refers to the last path component. It is an error to pass an index which is out of bounds.