#define silc_list_init_prev(list, type, nextfield, prevfield) ...

    This macro initializes the SilcList list.  The `list' is the defined
    list, second argument is the structure of the entries in the list,
    and last two arguments are the pointers in the structure that is used
    as next and prev list members.  When using SilcList you must not
    touch the structure member pointers manually.

    Having both next and prev pointers makes it possible to traverse
    list from both ends of the list (from start to end, and from end
    to start).

    struct SilcInternalEntryStruct {
      char *dummy;
      struct SilcInternalEntryStruct *next; // The list member pointer
      struct SilcInternalEntryStruct *prev; // The list member pointer
    };

    SilcList list;
    silc_list_init_prev(list, struct SilcInternalEntryStruct, next, prev);