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