1 /* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */
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34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
36 static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * xdr_reference.c, Generic XDR routines impelmentation.
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(XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t proc)
71 * caddr_t *pp; // the pointer to work on
72 * u_int size; // size of the object pointed to
73 * xdrproc_t proc; // xdr routine to handle the object
85 *pp = loc = (caddr_t) mem_alloc(size);
87 warnx("xdr_reference: out of memory");
97 stat = (*proc)(xdrs, loc);
99 if (xdrs->x_op == XDR_FREE) {
110 * XDR a pointer to a possibly recursive data structure. This
111 * differs with xdr_reference in that it can serialize/deserialiaze
114 * What's sent is actually a union:
116 * union object_pointer switch (boolean b) {
117 * case TRUE: object_data data;
118 * case FALSE: void nothing;
121 * > objpp: Pointer to the pointer to the object.
122 * > obj_size: size of the object.
123 * > xdr_obj: routine to XDR an object.
127 xdr_pointer(XDR *xdrs, char **objpp, u_int obj_size, xdrproc_t xdr_obj)
132 more_data = (*objpp != NULL);
133 if (! xdr_bool(xdrs,&more_data)) {
140 return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));