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-rw-r--r--lib/librpc/rpc/pmap_prot2.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/lib/librpc/rpc/pmap_prot2.c b/lib/librpc/rpc/pmap_prot2.c
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--- a/lib/librpc/rpc/pmap_prot2.c
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-/* @(#)pmap_prot2.c 2.1 88/07/29 4.0 RPCSRC */
-/*
- * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
- * unrestricted use provided that this legend is included on all tape
- * media and as a part of the software program in whole or part. Users
- * may copy or modify Sun RPC without charge, but are not authorized
- * to license or distribute it to anyone else except as part of a product or
- * program developed by the user.
- *
- * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
- * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
- * Sun RPC is provided with no support and without any obligation on the
- * part of Sun Microsystems, Inc. to assist in its use, correction,
- * modification or enhancement.
- *
- * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
- * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
- * OR ANY PART THEREOF.
- *
- * In no event will Sun Microsystems, Inc. be liable for any lost revenue
- * or profits or other special, indirect and consequential damages, even if
- * Sun has been advised of the possibility of such damages.
- *
- * Sun Microsystems, Inc.
- * 2550 Garcia Avenue
- * Mountain View, California 94043
- */
-#if !defined(lint) && defined(SCCSIDS)
-static char sccsid[] = "@(#)pmap_prot2.c 1.3 87/08/11 Copyr 1984 Sun Micro";
-#endif
-
-/*
- * pmap_prot2.c
- * Protocol for the local binder service, or pmap.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
-#include <rpc/types.h>
-#include <rpc/xdr.h>
-#include <rpc/pmap_prot.h>
-
-
-/*
- * What is going on with linked lists? (!)
- * First recall the link list declaration from pmap_prot.h:
- *
- * struct pmaplist {
- * struct pmap pml_map;
- * struct pmaplist *pml_map;
- * };
- *
- * Compare that declaration with a corresponding xdr declaration that
- * is (a) pointer-less, and (b) recursive:
- *
- * typedef union switch (bool_t) {
- *
- * case TRUE: struct {
- * struct pmap;
- * pmaplist_t foo;
- * };
- *
- * case FALSE: struct {};
- * } pmaplist_t;
- *
- * Notice that the xdr declaration has no nxt pointer while
- * the C declaration has no bool_t variable. The bool_t can be
- * interpreted as ``more data follows me''; if FALSE then nothing
- * follows this bool_t; if TRUE then the bool_t is followed by
- * an actual struct pmap, and then (recursively) by the
- * xdr union, pamplist_t.
- *
- * This could be implemented via the xdr_union primitive, though this
- * would cause a one recursive call per element in the list. Rather than do
- * that we can ``unwind'' the recursion
- * into a while loop and do the union arms in-place.
- *
- * The head of the list is what the C programmer wishes to past around
- * the net, yet is the data that the pointer points to which is interesting;
- * this sounds like a job for xdr_reference!
- */
-bool_t
-xdr_pmaplist(xdrs, rp)
- register XDR *xdrs;
- register struct pmaplist **rp;
-{
- /*
- * more_elements is pre-computed in case the direction is
- * XDR_ENCODE or XDR_FREE. more_elements is overwritten by
- * xdr_bool when the direction is XDR_DECODE.
- */
- bool_t more_elements;
- register int freeing = (xdrs->x_op == XDR_FREE);
- register struct pmaplist **next;
-
- while (TRUE) {
- more_elements = (bool_t)(*rp != NULL);
- if (! xdr_bool(xdrs, &more_elements))
- return (FALSE);
- if (! more_elements)
- return (TRUE); /* we are done */
- /*
- * the unfortunate side effect of non-recursion is that in
- * the case of freeing we must remember the next object
- * before we free the current object ...
- */
- if (freeing)
- next = &((*rp)->pml_next);
- if (! xdr_reference(xdrs, (caddr_t *)rp,
- (u_int)sizeof(struct pmaplist), xdr_pmap))
- return (FALSE);
- rp = (freeing) ? next : &((*rp)->pml_next);
- }
-}
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