1 /* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */
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32 #include <sys/cdefs.h>
34 * xdr_array.c, Generic XDR routines implementation.
36 * Copyright (C) 1984, Sun Microsystems, Inc.
38 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
39 * arrays. See xdr.h for more info on the interface to xdr.
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/limits.h>
45 #include <sys/malloc.h>
47 #include <rpc/types.h>
51 * XDR an array of arbitrary elements
52 * *addrp is a pointer to the array, *sizep is the number of elements.
53 * If addrp is NULL (*sizep * elsize) bytes are allocated.
54 * elsize is the size (in bytes) of each element, and elproc is the
55 * xdr procedure to call to handle each element of the array.
59 caddr_t *addrp, /* array pointer */
60 u_int *sizep, /* number of elements */
61 u_int maxsize, /* max numberof elements */
62 u_int elsize, /* size in bytes of each element */
63 xdrproc_t elproc) /* xdr routine to handle each element */
66 caddr_t target = *addrp;
67 u_int c; /* the actual element count */
71 /* like strings, arrays are really counted arrays */
72 if (!xdr_u_int(xdrs, sizep)) {
76 if ((c > maxsize || UINT_MAX/elsize < c) &&
77 (xdrs->x_op != XDR_FREE)) {
80 nodesize = c * elsize;
83 * if we are deserializing, we may need to allocate an array.
84 * We also save time by checking for a null array if we are freeing.
91 *addrp = target = mem_alloc(nodesize);
93 printf("xdr_array: out of memory");
96 memset(target, 0, nodesize);
107 * now we xdr each element of array
109 for (i = 0; (i < c) && stat; i++) {
110 stat = (*elproc)(xdrs, target);
115 * the array may need freeing
117 if (xdrs->x_op == XDR_FREE) {
118 mem_free(*addrp, nodesize);
127 * XDR a fixed length array. Unlike variable-length arrays,
128 * the storage of fixed length arrays is static and unfreeable.
129 * > basep: base of the array
130 * > size: size of the array
131 * > elemsize: size of each element
132 * > xdr_elem: routine to XDR each element
135 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize,
142 for (i = 0; i < nelem; i++) {
143 if (!(*xdr_elem)(xdrs, elptr)) {