2 * xdr_array.c, Generic XDR routines implementation.
4 * Copyright (C) 1984, Sun Microsystems, Inc.
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33 * These are the "non-trivial" xdr primitives used to serialize and
34 * de-serialize arrays. See xdr.h for more info on the interface to xdr.
39 #include <rpc/types.h>
48 #define LASTUNSIGNED ((u_int)0-1)
52 * XDR an array of arbitrary elements
53 * *addrp is a pointer to the array, *sizep is the number of elements.
54 * If addrp is NULL (*sizep * elsize) bytes are allocated.
55 * elsize is the size (in bytes) of each element, and elproc is the
56 * xdr procedure to call to handle each element of the array.
59 xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc)
61 caddr_t *addrp; /* array pointer */
62 u_int *sizep; /* number of elements */
63 u_int maxsize; /* max numberof elements */
64 u_int elsize; /* size in bytes of each element */
65 xdrproc_t elproc; /* xdr routine to handle each element */
68 caddr_t target = *addrp;
69 u_int c; /* the actual element count */
72 /* like strings, arrays are really counted arrays */
73 if (!INTUSE(xdr_u_int) (xdrs, sizep))
79 * XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
80 * doesn't actually use its second argument anyway.
82 if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
88 * if we are deserializing, we may need to allocate an array.
89 * We also save time by checking for a null array if we are freeing.
97 *addrp = target = calloc (c, elsize);
100 (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
112 * now we xdr each element of array
114 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)
125 mem_free (*addrp, c * elsize);
135 * XDR a fixed length array. Unlike variable-length arrays,
136 * the storage of fixed length arrays is static and unfreeable.
137 * > basep: base of the array
138 * > size: size of the array
139 * > elemsize: size of each element
140 * > xdr_elem: routine to XDR each element
143 xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem)
154 for (i = 0; i < nelem; i++)
156 if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))