1 /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */
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34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char *sccsid2 = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
36 static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * xdr_array.c, Generic XDR routines impelmentation.
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.
48 #include "namespace.h"
55 #include <rpc/types.h>
57 #include "un-namespace.h"
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.
67 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc)
70 * caddr_t *addrp; // array pointer
71 * u_int *sizep; // number of elements
72 * u_int maxsize; // max numberof elements
73 * u_int elsize; // size in bytes of each element
74 * xdrproc_t elproc; // xdr routine to handle each element
78 caddr_t target = *addrp;
79 u_int c; /* the actual element count */
83 /* like strings, arrays are really counted arrays */
84 if (!xdr_u_int(xdrs, sizep)) {
88 if ((c > maxsize || UINT_MAX/elsize < c) &&
89 (xdrs->x_op != XDR_FREE)) {
92 nodesize = c * elsize;
95 * if we are deserializing, we may need to allocate an array.
96 * We also save time by checking for a null array if we are freeing.
103 *addrp = target = mem_alloc(nodesize);
104 if (target == NULL) {
105 warnx("xdr_array: out of memory");
108 memset(target, 0, nodesize);
119 * now we xdr each element of array
121 for (i = 0; (i < c) && stat; i++) {
122 stat = (*elproc)(xdrs, target);
127 * the array may need freeing
129 if (xdrs->x_op == XDR_FREE) {
130 mem_free(*addrp, nodesize);
139 * XDR a fixed length array. Unlike variable-length arrays,
140 * the storage of fixed length arrays is static and unfreeable.
141 * > basep: base of the array
142 * > size: size of the array
143 * > elemsize: size of each element
144 * > xdr_elem: routine to XDR each element
147 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, xdrproc_t xdr_elem)
153 for (i = 0; i < nelem; i++) {
154 if (!(*xdr_elem)(xdrs, elptr)) {