diff options
Diffstat (limited to 'libc/inet/rpc/pmap_prot2.c')
| -rw-r--r-- | libc/inet/rpc/pmap_prot2.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/libc/inet/rpc/pmap_prot2.c b/libc/inet/rpc/pmap_prot2.c deleted file mode 100644 index f383757e8..000000000 --- a/libc/inet/rpc/pmap_prot2.c +++ /dev/null @@ -1,117 +0,0 @@ -/* @(#)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 0 -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 (XDR *xdrs, 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; - int freeing = (xdrs->x_op == XDR_FREE); - struct pmaplist **next = NULL; - - 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), - (xdrproc_t) xdr_pmap)) - return FALSE; - rp = freeing ? next : &((*rp)->pml_next); - } -} -libc_hidden_def(xdr_pmaplist) |