1 /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */
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36 #if defined(LIBC_SCCS) && !defined(lint)
37 static char *sccsid2 = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
38 static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
44 * xdr_array.c, Generic XDR routines impelmentation.
46 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
47 * arrays. See xdr.h for more info on the interface to xdr.
50 #include "namespace.h"
57 #include <rpc/types.h>
59 #include "un-namespace.h"
62 * XDR an array of arbitrary elements
63 * *addrp is a pointer to the array, *sizep is the number of elements.
64 * If addrp is NULL (*sizep * elsize) bytes are allocated.
65 * elsize is the size (in bytes) of each element, and elproc is the
66 * xdr procedure to call to handle each element of the array.
69 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc)
72 * caddr_t *addrp; // array pointer
73 * u_int *sizep; // number of elements
74 * u_int maxsize; // max numberof elements
75 * u_int elsize; // size in bytes of each element
76 * xdrproc_t elproc; // xdr routine to handle each element
80 caddr_t target = *addrp;
81 u_int c; /* the actual element count */
85 /* like strings, arrays are really counted arrays */
86 if (!xdr_u_int(xdrs, sizep)) {
90 if ((c > maxsize || UINT_MAX/elsize < c) &&
91 (xdrs->x_op != XDR_FREE)) {
94 nodesize = c * elsize;
97 * if we are deserializing, we may need to allocate an array.
98 * We also save time by checking for a null array if we are freeing.
101 switch (xdrs->x_op) {
105 *addrp = target = mem_alloc(nodesize);
106 if (target == NULL) {
107 warnx("xdr_array: out of memory");
110 memset(target, 0, nodesize);
121 * now we xdr each element of array
123 for (i = 0; (i < c) && stat; i++) {
124 stat = (*elproc)(xdrs, target);
129 * the array may need freeing
131 if (xdrs->x_op == XDR_FREE) {
132 mem_free(*addrp, nodesize);
141 * XDR a fixed length array. Unlike variable-length arrays,
142 * the storage of fixed length arrays is static and unfreeable.
143 * > basep: base of the array
144 * > size: size of the array
145 * > elemsize: size of each element
146 * > xdr_elem: routine to XDR each element
149 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, xdrproc_t xdr_elem)
155 for (i = 0; i < nelem; i++) {
156 if (!(*xdr_elem)(xdrs, elptr)) {