source: rtems-libbsd/services/librpc/src/rpc/pmap_prot2.c @ e599318

4.115-freebsd-12freebsd-9.3
Last change on this file since e599318 was e599318, checked in by Sebastian Huber <sebastian.huber@…>, on Oct 9, 2013 at 8:52:54 PM

Update files to match FreeBSD layout

Add compatibility with Newlib header files. Some FreeBSD header files
are mapped by the translation script:

o rtems/bsd/sys/_types.h
o rtems/bsd/sys/errno.h
o rtems/bsd/sys/lock.h
o rtems/bsd/sys/param.h
o rtems/bsd/sys/resource.h
o rtems/bsd/sys/time.h
o rtems/bsd/sys/timespec.h
o rtems/bsd/sys/types.h
o rtems/bsd/sys/unistd.h

It is now possible to include <sys/socket.h> directly for example.

Generate one Makefile which builds everything including tests.

  • Property mode set to 100644
File size: 4.0 KB
Line 
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char *sccsid = "from: @(#)pmap_prot2.c 1.3 87/08/11 Copyr 1984 Sun Micro";*/
32/*static char *sccsid = "from: @(#)pmap_prot2.c 2.1 88/07/29 4.0 RPCSRC";*/
33static char *rcsid = "$FreeBSD: src/lib/libc/rpc/pmap_prot2.c,v 1.7 1999/08/28 00:00:42 peter Exp $";
34#endif
35
36/*
37 * pmap_prot2.c
38 * Protocol for the local binder service, or pmap.
39 *
40 * Copyright (C) 1984, Sun Microsystems, Inc.
41 */
42
43#ifdef HAVE_CONFIG_H
44#include "config.h"
45#endif
46
47#ifndef __rtems__
48        /* XXX not needed in old.. */
49        #include <sys/types.h>
50#endif
51#include <rpc/types.h>
52#include <rpc/xdr.h>
53#include <rpc/pmap_prot.h>
54
55
56/*
57 * What is going on with linked lists? (!)
58 * First recall the link list declaration from pmap_prot.h:
59 *
60 * struct pmaplist {
61 *      struct pmap pml_map;
62 *      struct pmaplist *pml_map;
63 * };
64 *
65 * Compare that declaration with a corresponding xdr declaration that
66 * is (a) pointer-less, and (b) recursive:
67 *
68 * typedef union switch (bool_t) {
69 *
70 *      case TRUE: struct {
71 *              struct pmap;
72 *              pmaplist_t foo;
73 *      };
74 *
75 *      case FALSE: struct {};
76 * } pmaplist_t;
77 *
78 * Notice that the xdr declaration has no nxt pointer while
79 * the C declaration has no bool_t variable.  The bool_t can be
80 * interpreted as ``more data follows me''; if FALSE then nothing
81 * follows this bool_t; if TRUE then the bool_t is followed by
82 * an actual struct pmap, and then (recursively) by the
83 * xdr union, pamplist_t.
84 *
85 * This could be implemented via the xdr_union primitive, though this
86 * would cause a one recursive call per element in the list.  Rather than do
87 * that we can ``unwind'' the recursion
88 * into a while loop and do the union arms in-place.
89 *
90 * The head of the list is what the C programmer wishes to past around
91 * the net, yet is the data that the pointer points to which is interesting;
92 * this sounds like a job for xdr_reference!
93 */
94bool_t
95xdr_pmaplist(
96        XDR *xdrs,
97        struct pmaplist **rp)
98{
99        /*
100         * more_elements is pre-computed in case the direction is
101         * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
102         * xdr_bool when the direction is XDR_DECODE.
103         */
104        bool_t more_elements;
105        register int freeing = (xdrs->x_op == XDR_FREE);
106        register struct pmaplist **next = NULL;
107
108        while (TRUE) {
109                more_elements = (bool_t)(*rp != NULL);
110                if (! xdr_bool(xdrs, &more_elements))
111                        return (FALSE);
112                if (! more_elements)
113                        return (TRUE);  /* we are done */
114                /*
115                 * the unfortunate side effect of non-recursion is that in
116                 * the case of freeing we must remember the next object
117                 * before we free the current object ...
118                 */
119                if (freeing)
120                        next = &((*rp)->pml_next);
121                if (! xdr_reference(xdrs, (caddr_t *)rp,
122                    (u_int)sizeof(struct pmaplist), (xdrproc_t) xdr_pmap))
123                        return (FALSE);
124                rp = (freeing) ? next : &((*rp)->pml_next);
125        }
126}
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