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.
48 #include <rpc/types.h>
54 /* libc_hidden_proto(fwprintf) */
57 /* Experimentally off - libc_hidden_proto(memset) */
58 /* libc_hidden_proto(fputs) */
59 /* libc_hidden_proto(xdr_u_int) */
61 #define LASTUNSIGNED ((u_int)0-1)
65 * XDR an array of arbitrary elements
66 * *addrp is a pointer to the array, *sizep is the number of elements.
67 * If addrp is NULL (*sizep * elsize) bytes are allocated.
68 * elsize is the size (in bytes) of each element, and elproc is the
69 * xdr procedure to call to handle each element of the array.
71 /* libc_hidden_proto(xdr_array) */
73 xdr_array (XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize, xdrproc_t elproc)
76 caddr_t target = *addrp;
77 u_int c; /* the actual element count */
81 /* like strings, arrays are really counted arrays */
82 if (!xdr_u_int (xdrs, sizep))
88 * XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
89 * doesn't actually use its second argument anyway.
91 if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
95 nodesize = c * elsize;
98 * if we are deserializing, we may need to allocate an array.
99 * We also save time by checking for a null array if we are freeing.
107 *addrp = target = mem_alloc (nodesize);
111 if (_IO_fwide (stderr, 0) > 0)
112 (void) fwprintf (stderr, L"%s",
113 _("xdr_array: out of memory\n"));
116 (void) fputs (_("xdr_array: out of memory\n"), stderr);
119 memset (target, 0, nodesize);
129 * now we xdr each element of array
131 for (i = 0; (i < c) && stat; i++)
133 stat = (*elproc) (xdrs, target, LASTUNSIGNED);
138 * the array may need freeing
140 if (xdrs->x_op == XDR_FREE)
142 mem_free (*addrp, nodesize);
147 libc_hidden_def(xdr_array)
152 * XDR a fixed length array. Unlike variable-length arrays,
153 * the storage of fixed length arrays is static and unfreeable.
154 * > basep: base of the array
155 * > size: size of the array
156 * > elemsize: size of each element
157 * > xdr_elem: routine to XDR each element
160 xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem)
171 for (i = 0; i < nelem; i++)
173 if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))