NAME

       delnum - delete an element of a num_list

SYNOPSYS

       #include "mut.h"
       num_list ∗delnum(pthead, ptdel)
       num_list ∗pthead, ∗ptdel;

PARAMETERS

       pthead              Pointer to a num list

       ptdel               Pointer to the element to be deleted.

DESCRIPTION

       delnum  deletes  the element of the num_list pointed to by ptdel in the list pointed to by
       pthead.  The list consistency is maintainded, and the element put back in the list of free
       blocks.

RETURN VALUE

       delnum  returns  a  pointer to the new head of list if the ptdel pointer used to belong to
       the list. In most case, it has the value of pthead. If the pointer doesn't belong  to  the
       list, NULL is returned.

ERROR

       "∗∗∗ mbk error ∗∗∗ delnum impossible : pointer NULL"
              At  least  one  of  the  arguments are pointing to NULL, and that clear that such a
              pointer can't be deleted.

EXAMPLE

       #include "mut.h"
       void delete_match(c0, c1)
       num_list ∗c1, ∗c2;
       {
       num_list ∗t0, ∗t1, ∗next;
          for (t0 = c0; t0; t0 = next)
             for (t1 = c1; t1; t1 = t1->NEXT)
                if (t1->DATA == t0->DATA)
                   next = delnum(c0, t0);
       }

SEE ALSO

       mbk(1), num(3), addnum(3), freenum(3).