1/* 2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights 7 * Reserved. This file contains Original Code and/or Modifications of 8 * Original Code as defined in and that are subject to the Apple Public 9 * Source License Version 1.1 (the "License"). You may not use this file 10 * except in compliance with the License. Please obtain a copy of the 11 * License at http://www.apple.com/publicsource and read it before using 12 * this file. 13 * 14 * The Original Code and all software distributed under the License are 15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the 19 * License for the specific language governing rights and limitations 20 * under the License. 21 * 22 * @APPLE_LICENSE_HEADER_END@ 23 */ 24 25/* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */ 26 27/* 28 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 29 * unrestricted use provided that this legend is included on all tape 30 * media and as a part of the software program in whole or part. Users 31 * may copy or modify Sun RPC without charge, but are not authorized 32 * to license or distribute it to anyone else except as part of a product or 33 * program developed by the user. 34 * 35 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 36 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 37 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 38 * 39 * Sun RPC is provided with no support and without any obligation on the 40 * part of Sun Microsystems, Inc. to assist in its use, correction, 41 * modification or enhancement. 42 * 43 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 44 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 45 * OR ANY PART THEREOF. 46 * 47 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 48 * or profits or other special, indirect and consequential damages, even if 49 * Sun has been advised of the possibility of such damages. 50 * 51 * Sun Microsystems, Inc. 52 * 2550 Garcia Avenue 53 * Mountain View, California 94043 54 */ 55 56#include <sys/cdefs.h> 57#if defined(LIBC_SCCS) && !defined(lint) 58static char *sccsid = "@(#)xdr_reference.c 1.11 87/08/11 SMI"; 59static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC"; 60static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_reference.c,v 1.11 2002/03/22 21:53:26 obrien Exp $"; 61#endif 62#include <sys/cdefs.h> 63 64/* 65 * xdr_reference.c, Generic XDR routines impelmentation. 66 * 67 * Copyright (C) 1987, Sun Microsystems, Inc. 68 * 69 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 70 * "pointers". See xdr.h for more info on the interface to xdr. 71 */ 72 73#include <err.h> 74#include <stdio.h> 75#include <stdlib.h> 76#include <string.h> 77 78#include <rpc/types.h> 79#include <rpc/xdr.h> 80 81/* 82 * XDR an indirect pointer 83 * xdr_reference is for recursively translating a structure that is 84 * referenced by a pointer inside the structure that is currently being 85 * translated. pp references a pointer to storage. If *pp is null 86 * the necessary storage is allocated. 87 * size is the sizeof the referneced structure. 88 * proc is the routine to handle the referenced structure. 89 */ 90bool_t 91xdr_reference(xdrs, pp, size, proc) 92 XDR *xdrs; 93 caddr_t *pp; /* the pointer to work on */ 94 u_int size; /* size of the object pointed to */ 95 xdrproc_t proc; /* xdr routine to handle the object */ 96{ 97 caddr_t loc = *pp; 98 bool_t stat; 99 100 if (loc == NULL) 101 switch (xdrs->x_op) { 102 case XDR_FREE: 103 return (TRUE); 104 105 case XDR_DECODE: 106 *pp = loc = (caddr_t) mem_alloc(size); 107 if (loc == NULL) { 108 warnx("xdr_reference: out of memory"); 109 return (FALSE); 110 } 111 memset(loc, 0, size); 112 break; 113 114 case XDR_ENCODE: 115 break; 116 } 117 118 stat = (*proc)(xdrs, loc, 0); 119 120 if (xdrs->x_op == XDR_FREE) { 121 mem_free(loc, size); 122 *pp = NULL; 123 } 124 return (stat); 125} 126 127 128/* 129 * xdr_pointer(): 130 * 131 * XDR a pointer to a possibly recursive data structure. This 132 * differs with xdr_reference in that it can serialize/deserialiaze 133 * trees correctly. 134 * 135 * What's sent is actually a union: 136 * 137 * union object_pointer switch (boolean b) { 138 * case TRUE: object_data data; 139 * case FALSE: void nothing; 140 * } 141 * 142 * > objpp: Pointer to the pointer to the object. 143 * > obj_size: size of the object. 144 * > xdr_obj: routine to XDR an object. 145 * 146 */ 147bool_t 148xdr_pointer(xdrs,objpp,obj_size,xdr_obj) 149 XDR *xdrs; 150 char **objpp; 151 u_int obj_size; 152 xdrproc_t xdr_obj; 153{ 154 155 bool_t more_data; 156 157 more_data = (*objpp != NULL); 158 if (! xdr_bool(xdrs,&more_data)) { 159 return (FALSE); 160 } 161 if (! more_data) { 162 *objpp = NULL; 163 return (TRUE); 164 } 165 return (xdr_reference(xdrs,objpp,obj_size,xdr_obj)); 166} 167