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+/* @(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC */
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part. Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California 94043
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * xdr_array.c, Generic XDR routines impelmentation.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ *
+ * These are the "non-trivial" xdr primitives used to serialize and de-serialize
+ * arrays. See xdr.h for more info on the interface to xdr.
+ */
+
+#include <stdio.h>
+
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+
+#define LASTUNSIGNED ((u_int)0-1)
+
+
+/*
+ * XDR an array of arbitrary elements
+ * *addrp is a pointer to the array, *sizep is the number of elements.
+ * If addrp is NULL (*sizep * elsize) bytes are allocated.
+ * elsize is the size (in bytes) of each element, and elproc is the
+ * xdr procedure to call to handle each element of the array.
+ */
+bool_t
+xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc)
+ register XDR *xdrs;
+ caddr_t *addrp; /* array pointer */
+ u_int *sizep; /* number of elements */
+ u_int maxsize; /* max numberof elements */
+ u_int elsize; /* size in bytes of each element */
+ xdrproc_t elproc; /* xdr routine to handle each element */
+{
+ register u_int i;
+ register caddr_t target = *addrp;
+ register u_int c; /* the actual element count */
+ register bool_t stat = TRUE;
+ register u_int nodesize;
+
+ /* like strings, arrays are really counted arrays */
+ if (! xdr_u_int(xdrs, sizep)) {
+ return (FALSE);
+ }
+ c = *sizep;
+ if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
+ return (FALSE);
+ }
+ nodesize = c * elsize;
+
+ /*
+ * if we are deserializing, we may need to allocate an array.
+ * We also save time by checking for a null array if we are freeing.
+ */
+ if (target == NULL)
+ switch (xdrs->x_op) {
+ case XDR_DECODE:
+ if (c == 0)
+ return (TRUE);
+ *addrp = target = mem_alloc(nodesize);
+ if (target == NULL) {
+ (void) fprintf(stderr,
+ "xdr_array: out of memory\n");
+ return (FALSE);
+ }
+ bzero(target, nodesize);
+ break;
+
+ case XDR_FREE:
+ return (TRUE);
+ }
+
+ /*
+ * now we xdr each element of array
+ */
+ for (i = 0; (i < c) && stat; i++) {
+ stat = (*elproc)(xdrs, target, LASTUNSIGNED);
+ target += elsize;
+ }
+
+ /*
+ * the array may need freeing
+ */
+ if (xdrs->x_op == XDR_FREE) {
+ mem_free(*addrp, nodesize);
+ *addrp = NULL;
+ }
+ return (stat);
+}
+
+/*
+ * xdr_vector():
+ *
+ * XDR a fixed length array. Unlike variable-length arrays,
+ * the storage of fixed length arrays is static and unfreeable.
+ * > basep: base of the array
+ * > size: size of the array
+ * > elemsize: size of each element
+ * > xdr_elem: routine to XDR each element
+ */
+bool_t
+xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem)
+ register XDR *xdrs;
+ register char *basep;
+ register u_int nelem;
+ register u_int elemsize;
+ register xdrproc_t xdr_elem;
+{
+ register u_int i;
+ register char *elptr;
+
+ elptr = basep;
+ for (i = 0; i < nelem; i++) {
+ if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {
+ return(FALSE);
+ }
+ elptr += elemsize;
+ }
+ return(TRUE);
+}
+