1 /* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */
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30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
35 * xdr_array.c, Generic XDR routines impelmentation.
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.
47 #include <rpc/types.h>
50 #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 xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
63 caddr_t *addrp; /* array pointer */
64 u_int *sizep; /* number of elements */
65 u_int maxsize; /* max numberof elements */
66 u_int elsize; /* size in bytes of each element */
67 xdrproc_t elproc; /* xdr routine to handle each element */
70 register caddr_t target = *addrp;
71 register u_int c; /* the actual element count */
72 register bool_t stat = TRUE;
73 register u_int nodesize;
75 /* like strings, arrays are really counted arrays */
76 if (! xdr_u_int(xdrs, sizep)) {
80 if ((c > maxsize) && (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.
91 case XDR_ENCODE: break; /* keep gcc happy */
95 *addrp = target = mem_alloc(nodesize);
97 (void) fprintf(stderr,
98 "xdr_array: out of memory\n");
101 memset (target, 0, nodesize);
109 * now we xdr each element of array
111 for (i = 0; (i < c) && stat; i++) {
112 stat = (*elproc)(xdrs, target, LASTUNSIGNED);
117 * the array may need freeing
119 if (xdrs->x_op == XDR_FREE) {
120 mem_free(*addrp, nodesize);
129 * XDR a fixed length array. Unlike variable-length arrays,
130 * the storage of fixed length arrays is static and unfreeable.
131 * > basep: base of the array
132 * > size: size of the array
133 * > elemsize: size of each element
134 * > xdr_elem: routine to XDR each element
137 xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
139 register char *basep;
140 register u_int nelem;
141 register u_int elemsize;
142 register xdrproc_t xdr_elem;
145 register char *elptr;
148 for (i = 0; i < nelem; i++) {
149 if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {