L3tol Ltol3 convert between long integers and 3-byte integers l3tol long *lp char *cp int n ltol3 char *cp long *lp int n Certain system values, such as disc addresses, are maintained in three-byte form rather than four-byte; these functions enable arithmetic to be used on them. L3tol converts a vector on "n" three-byte integers pointed to by "cp", into a vector of long integers starting at "lp". Ltol3 does the opposite.