source: rtems-libbsd/freebsd/lib/libc/xdr/xdr_reference.c @ f41a394

55-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since f41a394 was f41a394, checked in by Sebastian Huber <sebastian.huber@…>, on Jun 9, 2016 at 9:46:09 AM

XDR(3): Import from FreeBSD

  • Property mode set to 100644
File size: 3.8 KB
Line 
1#include <machine/rtems-bsd-user-space.h>
2
3/*      $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */
4
5/*
6 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
7 * unrestricted use provided that this legend is included on all tape
8 * media and as a part of the software program in whole or part.  Users
9 * may copy or modify Sun RPC without charge, but are not authorized
10 * to license or distribute it to anyone else except as part of a product or
11 * program developed by the user.
12 *
13 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
14 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
15 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
16 *
17 * Sun RPC is provided with no support and without any obligation on the
18 * part of Sun Microsystems, Inc. to assist in its use, correction,
19 * modification or enhancement.
20 *
21 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
22 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
23 * OR ANY PART THEREOF.
24 *
25 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
26 * or profits or other special, indirect and consequential damages, even if
27 * Sun has been advised of the possibility of such damages.
28 *
29 * Sun Microsystems, Inc.
30 * 2550 Garcia Avenue
31 * Mountain View, California  94043
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
36static char *sccsid = "@(#)xdr_reference.c      2.1 88/07/29 4.0 RPCSRC";
37#endif
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41/*
42 * xdr_reference.c, Generic XDR routines impelmentation.
43 *
44 * Copyright (C) 1987, Sun Microsystems, Inc.
45 *
46 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
47 * "pointers".  See xdr.h for more info on the interface to xdr.
48 */
49
50#include "namespace.h"
51#include <err.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55
56#include <rpc/types.h>
57#include <rpc/xdr.h>
58#include "libc_private.h"
59
60/*
61 * XDR an indirect pointer
62 * xdr_reference is for recursively translating a structure that is
63 * referenced by a pointer inside the structure that is currently being
64 * translated.  pp references a pointer to storage. If *pp is null
65 * the  necessary storage is allocated.
66 * size is the sizeof the referneced structure.
67 * proc is the routine to handle the referenced structure.
68 */
69bool_t
70xdr_reference(xdrs, pp, size, proc)
71        XDR *xdrs;
72        caddr_t *pp;            /* the pointer to work on */
73        u_int size;             /* size of the object pointed to */
74        xdrproc_t proc;         /* xdr routine to handle the object */
75{
76        caddr_t loc = *pp;
77        bool_t stat;
78
79        if (loc == NULL)
80                switch (xdrs->x_op) {
81                case XDR_FREE:
82                        return (TRUE);
83
84                case XDR_DECODE:
85                        *pp = loc = (caddr_t) mem_alloc(size);
86                        if (loc == NULL) {
87                                warnx("xdr_reference: out of memory");
88                                return (FALSE);
89                        }
90                        memset(loc, 0, size);
91                        break;
92
93                case XDR_ENCODE:
94                        break;
95                }
96
97        stat = (*proc)(xdrs, loc);
98
99        if (xdrs->x_op == XDR_FREE) {
100                mem_free(loc, size);
101                *pp = NULL;
102        }
103        return (stat);
104}
105
106
107/*
108 * xdr_pointer():
109 *
110 * XDR a pointer to a possibly recursive data structure. This
111 * differs with xdr_reference in that it can serialize/deserialiaze
112 * trees correctly.
113 *
114 *  What's sent is actually a union:
115 *
116 *  union object_pointer switch (boolean b) {
117 *  case TRUE: object_data data;
118 *  case FALSE: void nothing;
119 *  }
120 *
121 * > objpp: Pointer to the pointer to the object.
122 * > obj_size: size of the object.
123 * > xdr_obj: routine to XDR an object.
124 *
125 */
126bool_t
127xdr_pointer(xdrs,objpp,obj_size,xdr_obj)
128        XDR *xdrs;
129        char **objpp;
130        u_int obj_size;
131        xdrproc_t xdr_obj;
132{
133
134        bool_t more_data;
135
136        more_data = (*objpp != NULL);
137        if (! xdr_bool(xdrs,&more_data)) {
138                return (FALSE);
139        }
140        if (! more_data) {
141                *objpp = NULL;
142                return (TRUE);
143        }
144        return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));
145}
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