1 /* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */
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31 static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
35 * xdr_array.c, Generic XDR routines implementation.
37 * Copyright (C) 1984, Sun Microsystems, Inc.
39 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
40 * arrays. See xdr.h for more info on the interface to xdr.
45 #include <rpc/types.h>
50 #define LASTUNSIGNED ((u_int)0-1)
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 (XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc)
63 caddr_t target = *addrp;
64 u_int c; /* the actual element count */
68 /* like strings, arrays are really counted arrays */
69 if (!xdr_u_int (xdrs, sizep))
75 * XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
76 * doesn't actually use its second argument anyway.
78 if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
82 nodesize = c * elsize;
85 * if we are deserializing, we may need to allocate an array.
86 * We also save time by checking for a null array if we are freeing.
94 *addrp = target = mem_alloc (nodesize);
97 (void) fputs (_("xdr_array: out of memory\n"), stderr);
100 memset (target, 0, nodesize);
110 * now we xdr each element of array
112 for (i = 0; (i < c) && stat; i++)
114 stat = (*elproc) (xdrs, target, LASTUNSIGNED);
119 * the array may need freeing
121 if (xdrs->x_op == XDR_FREE)
123 mem_free (*addrp, nodesize);
128 libc_hidden_def(xdr_array)
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++)
150 if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))