FreeBSD/Linux Kernel Cross Reference
sys/xdr/xdr_array.c
1 /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */
2
3 /*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char *sccsid2 = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
34 static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC";
35 #endif
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: stable/8/lib/libc/xdr/xdr_array.c 136582 2004-10-16 06:32:43Z obrien $");
38
39 /*
40 * xdr_array.c, Generic XDR routines impelmentation.
41 *
42 * Copyright (C) 1984, Sun Microsystems, Inc.
43 *
44 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
45 * arrays. See xdr.h for more info on the interface to xdr.
46 */
47
48 #include "namespace.h"
49 #include <err.h>
50 #include <limits.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54
55 #include <rpc/types.h>
56 #include <rpc/xdr.h>
57 #include "un-namespace.h"
58
59 /*
60 * XDR an array of arbitrary elements
61 * *addrp is a pointer to the array, *sizep is the number of elements.
62 * If addrp is NULL (*sizep * elsize) bytes are allocated.
63 * elsize is the size (in bytes) of each element, and elproc is the
64 * xdr procedure to call to handle each element of the array.
65 */
66 bool_t
67 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
68 XDR *xdrs;
69 caddr_t *addrp; /* array pointer */
70 u_int *sizep; /* number of elements */
71 u_int maxsize; /* max numberof elements */
72 u_int elsize; /* size in bytes of each element */
73 xdrproc_t elproc; /* xdr routine to handle each element */
74 {
75 u_int i;
76 caddr_t target = *addrp;
77 u_int c; /* the actual element count */
78 bool_t stat = TRUE;
79 u_int nodesize;
80
81 /* like strings, arrays are really counted arrays */
82 if (!xdr_u_int(xdrs, sizep)) {
83 return (FALSE);
84 }
85 c = *sizep;
86 if ((c > maxsize || UINT_MAX/elsize < c) &&
87 (xdrs->x_op != XDR_FREE)) {
88 return (FALSE);
89 }
90 nodesize = c * elsize;
91
92 /*
93 * if we are deserializing, we may need to allocate an array.
94 * We also save time by checking for a null array if we are freeing.
95 */
96 if (target == NULL)
97 switch (xdrs->x_op) {
98 case XDR_DECODE:
99 if (c == 0)
100 return (TRUE);
101 *addrp = target = mem_alloc(nodesize);
102 if (target == NULL) {
103 warnx("xdr_array: out of memory");
104 return (FALSE);
105 }
106 memset(target, 0, nodesize);
107 break;
108
109 case XDR_FREE:
110 return (TRUE);
111
112 case XDR_ENCODE:
113 break;
114 }
115
116 /*
117 * now we xdr each element of array
118 */
119 for (i = 0; (i < c) && stat; i++) {
120 stat = (*elproc)(xdrs, target);
121 target += elsize;
122 }
123
124 /*
125 * the array may need freeing
126 */
127 if (xdrs->x_op == XDR_FREE) {
128 mem_free(*addrp, nodesize);
129 *addrp = NULL;
130 }
131 return (stat);
132 }
133
134 /*
135 * xdr_vector():
136 *
137 * XDR a fixed length array. Unlike variable-length arrays,
138 * the storage of fixed length arrays is static and unfreeable.
139 * > basep: base of the array
140 * > size: size of the array
141 * > elemsize: size of each element
142 * > xdr_elem: routine to XDR each element
143 */
144 bool_t
145 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
146 XDR *xdrs;
147 char *basep;
148 u_int nelem;
149 u_int elemsize;
150 xdrproc_t xdr_elem;
151 {
152 u_int i;
153 char *elptr;
154
155 elptr = basep;
156 for (i = 0; i < nelem; i++) {
157 if (!(*xdr_elem)(xdrs, elptr)) {
158 return(FALSE);
159 }
160 elptr += elemsize;
161 }
162 return(TRUE);
163 }
Cache object: d8d74d0410a0986cb05b362bd78c9378
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