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29 * @(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro
30 * @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC
31 * $FreeBSD: src/lib/libc/xdr/xdr_array.c,v 1.8.2.3 2002/08/01 12:23:20 nectar Exp $
32 * $DragonFly: src/lib/libc/xdr/xdr_array.c,v 1.4 2005/12/05 00:47:57 swildner Exp $
36 * xdr_array.c, Generic XDR routines impelmentation.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
40 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
41 * arrays. See xdr.h for more info on the interface to xdr.
48 #include <rpc/types.h>
51 #define LASTUNSIGNED ((u_int) 0-1)
54 * XDR an array of arbitrary elements
55 * *addrp is a pointer to the array, *sizep is the number of elements.
56 * If addrp is NULL (*sizep * elsize) bytes are allocated.
57 * elsize is the size (in bytes) of each element, and elproc is the
58 * xdr procedure to call to handle each element of the array.
61 * addrp: array pointer
62 * sizep: number of elements
63 * maxsize: max number of elements
64 * elsize: size in bytes of each element
65 * elproc: xdr routine to handle each element
68 xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize,
72 caddr_t target = *addrp;
73 u_int c; /* the actual element count */
77 /* like strings, arrays are really counted arrays */
78 if (!xdr_u_int(xdrs, sizep)) {
82 if ((c > maxsize || UINT_MAX/elsize < c) &&
83 (xdrs->x_op != XDR_FREE)) {
86 nodesize = c * elsize;
89 * if we are deserializing, we may need to allocate an array.
90 * We also save time by checking for a null array if we are freeing.
97 *addrp = target = mem_alloc(nodesize);
100 "xdr_array: out of memory\n");
103 memset(target, 0, nodesize);
113 * now we xdr each element of array
115 for (i = 0; (i < c) && stat; i++) {
116 stat = (*elproc)(xdrs, target, LASTUNSIGNED);
121 * the array may need freeing
123 if (xdrs->x_op == XDR_FREE) {
124 mem_free(*addrp, nodesize);
133 * XDR a fixed length array. Unlike variable-length arrays,
134 * the storage of fixed length arrays is static and unfreeable.
135 * > basep: base of the array
136 * > size: size of the array
137 * > elemsize: size of each element
138 * > xdr_elem: routine to XDR each element
141 xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize,
148 for (i = 0; i < nelem; i++) {
149 if (!(*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {