1 /* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */
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32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
34 static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC";
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
40 * xdr_reference.c, Generic XDR routines impelmentation.
42 * Copyright (C) 1987, Sun Microsystems, Inc.
44 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
45 * "pointers". See xdr.h for more info on the interface to xdr.
48 #include "namespace.h"
54 #include <rpc/types.h>
56 #include "libc_private.h"
59 * XDR an indirect pointer
60 * xdr_reference is for recursively translating a structure that is
61 * referenced by a pointer inside the structure that is currently being
62 * translated. pp references a pointer to storage. If *pp is null
63 * the necessary storage is allocated.
64 * size is the sizeof the referneced structure.
65 * proc is the routine to handle the referenced structure.
68 xdr_reference(xdrs, pp, size, proc)
70 caddr_t *pp; /* the pointer to work on */
71 u_int size; /* size of the object pointed to */
72 xdrproc_t proc; /* xdr routine to handle the object */
83 *pp = loc = (caddr_t) mem_alloc(size);
85 warnx("xdr_reference: out of memory");
95 stat = (*proc)(xdrs, loc);
97 if (xdrs->x_op == XDR_FREE) {
108 * XDR a pointer to a possibly recursive data structure. This
109 * differs with xdr_reference in that it can serialize/deserialiaze
112 * What's sent is actually a union:
114 * union object_pointer switch (boolean b) {
115 * case TRUE: object_data data;
116 * case FALSE: void nothing;
119 * > objpp: Pointer to the pointer to the object.
120 * > obj_size: size of the object.
121 * > xdr_obj: routine to XDR an object.
125 xdr_pointer(xdrs,objpp,obj_size,xdr_obj)
134 more_data = (*objpp != NULL);
135 if (! xdr_bool(xdrs,&more_data)) {
142 return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));