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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 implementation.
*
* 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);
}
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