1 /* @(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC */
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31 static char sccsid[] = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
35 * xdr_reference.c, Generic XDR routines implementation.
37 * Copyright (C) 1987, Sun Microsystems, Inc.
39 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
40 * "pointers". See xdr.h for more info on the interface to xdr.
49 #include <rpc/types.h>
54 # include <libio/iolibio.h>
55 # define fputs(s, f) _IO_fputs (s, f)
56 libc_hidden_proto(fwprintf)
59 libc_hidden_proto(memset)
60 libc_hidden_proto(xdr_bool)
61 libc_hidden_proto(fputs)
63 #define LASTUNSIGNED ((u_int)0-1)
66 * XDR an indirect pointer
67 * xdr_reference is for recursively translating a structure that is
68 * referenced by a pointer inside the structure that is currently being
69 * translated. pp references a pointer to storage. If *pp is null
70 * the necessary storage is allocated.
71 * size is the size of the referneced structure.
72 * proc is the routine to handle the referenced structure.
75 xdr_reference (XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t proc)
87 *pp = loc = (caddr_t) mem_alloc (size);
91 if (_IO_fwide (stderr, 0) > 0)
92 (void) fwprintf (stderr, L"%s",
93 _("xdr_reference: out of memory\n"));
96 (void) fputs (_("xdr_reference: out of memory\n"), stderr);
99 memset (loc, 0, (int) size);
105 stat = (*proc) (xdrs, loc, LASTUNSIGNED);
107 if (xdrs->x_op == XDR_FREE)
109 mem_free (loc, size);
114 libc_hidden_proto(xdr_reference)
115 libc_hidden_def(xdr_reference)
120 * XDR a pointer to a possibly recursive data structure. This
121 * differs with xdr_reference in that it can serialize/deserialize
124 * What's sent is actually a union:
126 * union object_pointer switch (boolean b) {
127 * case TRUE: object_data data;
128 * case FALSE: void nothing;
131 * > objpp: Pointer to the pointer to the object.
132 * > obj_size: size of the object.
133 * > xdr_obj: routine to XDR an object.
137 xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
146 more_data = (*objpp != NULL);
147 if (!xdr_bool (xdrs, &more_data))
156 return xdr_reference (xdrs, objpp, obj_size, xdr_obj);