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29 * @(#)xdr_reference.c 1.11 87/08/11 SMI
30 * @(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC
31 * $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $
32 * $FreeBSD: src/lib/libc/xdr/xdr_reference.c,v 1.12 2004/10/16 06:32:43 obrien Exp $
33 * $DragonFly: src/lib/libc/xdr/xdr_reference.c,v 1.4 2005/12/05 00:47:57 swildner Exp $
37 * xdr_reference.c, Generic XDR routines impelmentation.
39 * Copyright (C) 1987, Sun Microsystems, Inc.
41 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
42 * "pointers". See xdr.h for more info on the interface to xdr.
45 #include "namespace.h"
51 #include <rpc/types.h>
53 #include "libc_private.h"
56 * XDR an indirect pointer
57 * xdr_reference is for recursively translating a structure that is
58 * referenced by a pointer inside the structure that is currently being
59 * translated. pp references a pointer to storage. If *pp is null
60 * the necessary storage is allocated.
61 * size is the sizeof the referneced structure.
62 * proc is the routine to handle the referenced structure.
65 * pp: the pointer to work on
66 * size: size of the object pointed to
67 * proc: xdr routine to handle the object
70 xdr_reference(XDR
*xdrs
, caddr_t
*pp
, u_int size
, xdrproc_t proc
)
81 *pp
= loc
= (caddr_t
) mem_alloc(size
);
83 warnx("xdr_reference: out of memory");
93 stat
= (*proc
)(xdrs
, loc
);
95 if (xdrs
->x_op
== XDR_FREE
) {
106 * XDR a pointer to a possibly recursive data structure. This
107 * differs with xdr_reference in that it can serialize/deserialiaze
110 * What's sent is actually a union:
112 * union object_pointer switch (boolean b) {
113 * case TRUE: object_data data;
114 * case FALSE: void nothing;
117 * > objpp: Pointer to the pointer to the object.
118 * > obj_size: size of the object.
119 * > xdr_obj: routine to XDR an object.
123 xdr_pointer(XDR
*xdrs
, char **objpp
, u_int obj_size
, xdrproc_t xdr_obj
)
127 more_data
= (*objpp
!= NULL
);
128 if (! xdr_bool(xdrs
,&more_data
)) {
135 return (xdr_reference(xdrs
,objpp
,obj_size
,xdr_obj
));