Update.
[glibc.git] / sunrpc / xdr_ref.c
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1 /* @(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC */
2 /*
3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
4 * unrestricted use provided that this legend is included on all tape
5 * media and as a part of the software program in whole or part. Users
6 * may copy or modify Sun RPC without charge, but are not authorized
7 * to license or distribute it to anyone else except as part of a product or
8 * program developed by the user.
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
32 #endif
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.
43 #include <stdio.h>
44 #include <string.h>
45 #include <rpc/types.h>
46 #include <rpc/xdr.h>
47 #include <libintl.h>
49 #ifdef USE_IN_LIBIO
50 # include <wchar.h>
51 # include <libio/iolibio.h>
52 #endif
54 #define LASTUNSIGNED ((u_int)0-1)
57 * XDR an indirect pointer
58 * xdr_reference is for recursively translating a structure that is
59 * referenced by a pointer inside the structure that is currently being
60 * translated. pp references a pointer to storage. If *pp is null
61 * the necessary storage is allocated.
62 * size is the size of the referneced structure.
63 * proc is the routine to handle the referenced structure.
65 bool_t
66 xdr_reference (xdrs, pp, size, proc)
67 XDR *xdrs;
68 caddr_t *pp; /* the pointer to work on */
69 u_int size; /* size of the object pointed to */
70 xdrproc_t proc; /* xdr routine to handle the object */
72 caddr_t loc = *pp;
73 bool_t stat;
75 if (loc == NULL)
76 switch (xdrs->x_op)
78 case XDR_FREE:
79 return TRUE;
81 case XDR_DECODE:
82 *pp = loc = (caddr_t) mem_alloc (size);
83 if (loc == NULL)
85 #ifdef USE_IN_LIBIO
86 if (_IO_fwide (stderr, 0) > 0)
87 (void) __fwprintf (stderr, L"%s",
88 _("xdr_reference: out of memory\n"));
89 else
90 #endif
91 (void) fputs (_("xdr_reference: out of memory\n"), stderr);
92 return FALSE;
94 __bzero (loc, (int) size);
95 break;
96 default:
97 break;
100 stat = (*proc) (xdrs, loc, LASTUNSIGNED);
102 if (xdrs->x_op == XDR_FREE)
104 mem_free (loc, size);
105 *pp = NULL;
107 return stat;
109 INTDEF(xdr_reference)
113 * xdr_pointer():
115 * XDR a pointer to a possibly recursive data structure. This
116 * differs with xdr_reference in that it can serialize/deserialize
117 * trees correctly.
119 * What's sent is actually a union:
121 * union object_pointer switch (boolean b) {
122 * case TRUE: object_data data;
123 * case FALSE: void nothing;
126 * > objpp: Pointer to the pointer to the object.
127 * > obj_size: size of the object.
128 * > xdr_obj: routine to XDR an object.
131 bool_t
132 xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
133 XDR *xdrs;
134 char **objpp;
135 u_int obj_size;
136 xdrproc_t xdr_obj;
139 bool_t more_data;
141 more_data = (*objpp != NULL);
142 if (!INTUSE(xdr_bool) (xdrs, &more_data))
144 return FALSE;
146 if (!more_data)
148 *objpp = NULL;
149 return TRUE;
151 return INTUSE(xdr_reference) (xdrs, objpp, obj_size, xdr_obj);