| /* @(#)xdr_reference.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_reference.c 1.11 87/08/11 SMI"; |
| #endif |
| |
| /* |
| * xdr_reference.c, Generic XDR routines implementation. |
| * |
| * 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 <stdio.h> |
| #include <string.h> |
| #include <rpc/types.h> |
| #include <rpc/xdr.h> |
| #include <libintl.h> |
| |
| #ifdef USE_IN_LIBIO |
| # include <wchar.h> |
| # include <libio/iolibio.h> |
| #endif |
| |
| #define LASTUNSIGNED ((u_int)0-1) |
| |
| /* |
| * 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 size of the referneced structure. |
| * proc is the routine to handle the referenced structure. |
| */ |
| bool_t |
| xdr_reference (xdrs, pp, size, proc) |
| 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 */ |
| { |
| caddr_t loc = *pp; |
| bool_t stat; |
| |
| if (loc == NULL) |
| switch (xdrs->x_op) |
| { |
| case XDR_FREE: |
| return TRUE; |
| |
| case XDR_DECODE: |
| *pp = loc = (caddr_t) calloc (1, size); |
| if (loc == NULL) |
| { |
| (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n")); |
| return FALSE; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| stat = (*proc) (xdrs, loc, LASTUNSIGNED); |
| |
| if (xdrs->x_op == XDR_FREE) |
| { |
| mem_free (loc, size); |
| *pp = NULL; |
| } |
| return stat; |
| } |
| INTDEF(xdr_reference) |
| |
| |
| /* |
| * xdr_pointer(): |
| * |
| * XDR a pointer to a possibly recursive data structure. This |
| * differs with xdr_reference in that it can serialize/deserialize |
| * 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 |
| xdr_pointer (xdrs, objpp, obj_size, xdr_obj) |
| XDR *xdrs; |
| char **objpp; |
| u_int obj_size; |
| xdrproc_t xdr_obj; |
| { |
| |
| bool_t more_data; |
| |
| more_data = (*objpp != NULL); |
| if (!INTUSE(xdr_bool) (xdrs, &more_data)) |
| { |
| return FALSE; |
| } |
| if (!more_data) |
| { |
| *objpp = NULL; |
| return TRUE; |
| } |
| return INTUSE(xdr_reference) (xdrs, objpp, obj_size, xdr_obj); |
| } |