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30 #include <sys/cdefs.h>
33 * xdr_array.c, Generic XDR routines impelmentation.
35 * Copyright (C) 1984, Sun Microsystems, Inc.
37 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
38 * arrays. See xdr.h for more info on the interface to xdr.
41 #include "namespace.h"
48 #include <rpc/types.h>
50 #include "un-namespace.h"
53 * XDR an array of arbitrary elements
54 * *addrp is a pointer to the array, *sizep is the number of elements.
55 * If addrp is NULL (*sizep * elsize) bytes are allocated.
56 * elsize is the size (in bytes) of each element, and elproc is the
57 * xdr procedure to call to handle each element of the array.
60 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
62 caddr_t *addrp; /* array pointer */
63 u_int *sizep; /* number of elements */
64 u_int maxsize; /* max numberof elements */
65 u_int elsize; /* size in bytes of each element */
66 xdrproc_t elproc; /* xdr routine to handle each element */
69 caddr_t target = *addrp;
70 u_int c; /* the actual element count */
74 /* like strings, arrays are really counted arrays */
75 if (!xdr_u_int(xdrs, sizep)) {
79 if ((c > maxsize || UINT_MAX/elsize < c) &&
80 (xdrs->x_op != XDR_FREE)) {
83 nodesize = c * elsize;
86 * if we are deserializing, we may need to allocate an array.
87 * We also save time by checking for a null array if we are freeing.
94 *addrp = target = mem_alloc(nodesize);
96 warnx("xdr_array: out of memory");
99 memset(target, 0, nodesize);
110 * now we xdr each element of array
112 for (i = 0; (i < c) && stat; i++) {
113 stat = (*elproc)(xdrs, target);
118 * the array may need freeing
120 if (xdrs->x_op == XDR_FREE) {
121 mem_free(*addrp, nodesize);
130 * XDR a fixed length array. Unlike variable-length arrays,
131 * the storage of fixed length arrays is static and unfreeable.
132 * > basep: base of the array
133 * > size: size of the array
134 * > elemsize: size of each element
135 * > xdr_elem: routine to XDR each element
138 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
149 for (i = 0; i < nelem; i++) {
150 if (!(*xdr_elem)(xdrs, elptr)) {