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- /*
- * $Id: xdr_reference.c,v 4.2 1994/09/29 23:48:50 jraja Exp $
- *
- * Generic XDR routines impelmentation.
- *
- * Copyright © 1994 AmiTCP/IP Group,
- * Network Solutions Development Inc.
- * All rights reserved.
- *
- */
- /* @(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC */
- #if !defined(lint) && defined(SCCSIDS)
- static char sccsid[] = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
- #endif
-
- /*
- * Copyright (C) 1987, Sun Microsystems, Inc.
- *
- * These are the "non-trivial" xdr primitives used to serialize and de-serialize
- * "pointers". See xdr.h for more info on the interface to xdr.
- */
-
- #include <sys/param.h>
- #include <stdio.h>
- #include <rpc/types.h>
- #include <rpc/xdr.h>
- #include <limits.h>
-
- /*
- * XDR an indirect pointer
- * xdr_reference is for recursively translating a structure that is
- * referenced by a pointer inside the structure that is currently being
- * translated. pp references a pointer to storage. If *pp is null
- * the necessary storage is allocated.
- * size is the sizeof the referneced structure.
- * proc is the routine to handle the referenced structure.
- */
- bool_t XDRFUN
- xdr_reference(xdrs, pp, size, proc)
- register XDR *xdrs;
- caddr_t *pp; /* the pointer to work on */
- u_int size; /* size of the object pointed to */
- xdrproc_t proc; /* xdr routine to handle the object */
- {
- register caddr_t loc = *pp;
- register bool_t stat;
-
- if (loc == NULL)
- switch (xdrs->x_op) {
- case XDR_FREE:
- return (TRUE);
-
- case XDR_DECODE:
- *pp = loc = (caddr_t) mem_alloc(size);
- if (loc == NULL) {
- (void) fprintf(stderr,
- "xdr_reference: out of memory\n");
- return (FALSE);
- }
- bzero(loc, (int)size);
- break;
- }
-
- stat = (*(xdr_string_t)proc)(xdrs, loc, UINT_MAX);
-
- if (xdrs->x_op == XDR_FREE) {
- mem_free(loc, size);
- *pp = NULL;
- }
- return (stat);
- }
-
-
- /*
- * xdr_pointer():
- *
- * XDR a pointer to a possibly recursive data structure. This
- * differs with xdr_reference in that it can serialize/deserialiaze
- * trees correctly.
- *
- * What's sent is actually a union:
- *
- * union object_pointer switch (boolean b) {
- * case TRUE: object_data data;
- * case FALSE: void nothing;
- * }
- *
- * > objpp: Pointer to the pointer to the object.
- * > obj_size: size of the object.
- * > xdr_obj: routine to XDR an object.
- *
- */
- bool_t XDRFUN
- xdr_pointer(xdrs,objpp,obj_size,xdr_obj)
- register XDR *xdrs;
- char **objpp;
- u_int obj_size;
- xdrproc_t xdr_obj;
- {
-
- bool_t more_data;
-
- more_data = (*objpp != NULL);
- if (! xdr_bool(xdrs,&more_data)) {
- return (FALSE);
- }
- if (! more_data) {
- *objpp = NULL;
- return (TRUE);
- }
- return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));
- }
-