Fix date in ChangeLog
[glibc.git] / sunrpc / xdr_ref.c
blob8fb4584a75c4fd54fb7e210e8657cba22cc1df21
1 /*
2 * xdr_reference.c, Generic XDR routines implementation.
4 * Copyright (c) 2010, Oracle America, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * These are the "non-trivial" xdr primitives used to serialize and
34 * de-serialize "pointers". See xdr.h for more info on the interface to xdr.
37 #include <stdio.h>
38 #include <string.h>
39 #include <rpc/types.h>
40 #include <rpc/xdr.h>
41 #include <libintl.h>
42 #include <wchar.h>
43 #include <libio/iolibio.h>
45 #define LASTUNSIGNED ((u_int)0-1)
48 * XDR an indirect pointer
49 * xdr_reference is for recursively translating a structure that is
50 * referenced by a pointer inside the structure that is currently being
51 * translated. pp references a pointer to storage. If *pp is null
52 * the necessary storage is allocated.
53 * size is the size of the referneced structure.
54 * proc is the routine to handle the referenced structure.
56 bool_t
57 xdr_reference (xdrs, pp, size, proc)
58 XDR *xdrs;
59 caddr_t *pp; /* the pointer to work on */
60 u_int size; /* size of the object pointed to */
61 xdrproc_t proc; /* xdr routine to handle the object */
63 caddr_t loc = *pp;
64 bool_t stat;
66 if (loc == NULL)
67 switch (xdrs->x_op)
69 case XDR_FREE:
70 return TRUE;
72 case XDR_DECODE:
73 *pp = loc = (caddr_t) calloc (1, size);
74 if (loc == NULL)
76 (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
77 return FALSE;
79 break;
80 default:
81 break;
84 stat = (*proc) (xdrs, loc, LASTUNSIGNED);
86 if (xdrs->x_op == XDR_FREE)
88 mem_free (loc, size);
89 *pp = NULL;
91 return stat;
93 libc_hidden_nolink_sunrpc (xdr_reference, GLIBC_2_0)
97 * xdr_pointer():
99 * XDR a pointer to a possibly recursive data structure. This
100 * differs with xdr_reference in that it can serialize/deserialize
101 * trees correctly.
103 * What's sent is actually a union:
105 * union object_pointer switch (boolean b) {
106 * case TRUE: object_data data;
107 * case FALSE: void nothing;
110 * > objpp: Pointer to the pointer to the object.
111 * > obj_size: size of the object.
112 * > xdr_obj: routine to XDR an object.
115 bool_t
116 xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
117 XDR *xdrs;
118 char **objpp;
119 u_int obj_size;
120 xdrproc_t xdr_obj;
123 bool_t more_data;
125 more_data = (*objpp != NULL);
126 if (!xdr_bool (xdrs, &more_data))
128 return FALSE;
130 if (!more_data)
132 *objpp = NULL;
133 return TRUE;
135 return xdr_reference (xdrs, objpp, obj_size, xdr_obj);
137 #ifdef EXPORT_RPC_SYMBOLS
138 libc_hidden_def (xdr_pointer)
139 #else
140 libc_hidden_nolink_sunrpc (xdr_pointer, GLIBC_2_0)
141 #endif