xdr_array.c revision 101045
1/* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */ 2 3/* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32#if defined(LIBC_SCCS) && !defined(lint) 33static char *sccsid = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; 34static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC"; 35#endif 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/lib/libc/xdr/xdr_array.c 101045 2002-07-31 12:50:28Z darrenr $"); 38 39/* 40 * xdr_array.c, Generic XDR routines impelmentation. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 * 44 * These are the "non-trivial" xdr primitives used to serialize and de-serialize 45 * arrays. See xdr.h for more info on the interface to xdr. 46 */ 47 48#include "namespace.h" 49#include <err.h> 50#include <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53 54#include <rpc/types.h> 55#include <rpc/xdr.h> 56#include "un-namespace.h" 57 58/* 59 * XDR an array of arbitrary elements 60 * *addrp is a pointer to the array, *sizep is the number of elements. 61 * If addrp is NULL (*sizep * elsize) bytes are allocated. 62 * elsize is the size (in bytes) of each element, and elproc is the 63 * xdr procedure to call to handle each element of the array. 64 */ 65bool_t 66xdr_array(xdrs, addrp, sizep, maxsize, elsize, elproc) 67 XDR *xdrs; 68 caddr_t *addrp; /* array pointer */ 69 u_int *sizep; /* number of elements */ 70 u_int maxsize; /* max numberof elements */ 71 u_int elsize; /* size in bytes of each element */ 72 xdrproc_t elproc; /* xdr routine to handle each element */ 73{ 74 u_int i; 75 caddr_t target = *addrp; 76 u_int c; /* the actual element count */ 77 bool_t stat = TRUE; 78 u_int nodesize; 79 80 /* like strings, arrays are really counted arrays */ 81 if (!xdr_u_int(xdrs, sizep)) { 82 return (FALSE); 83 } 84 c = *sizep; 85 if ((c > maxsize && UINT_MAX/elsize < c) && 86 (xdrs->x_op != XDR_FREE)) { 87 return (FALSE); 88 } 89 nodesize = c * elsize; 90 91 /* 92 * if we are deserializing, we may need to allocate an array. 93 * We also save time by checking for a null array if we are freeing. 94 */ 95 if (target == NULL) 96 switch (xdrs->x_op) { 97 case XDR_DECODE: 98 if (c == 0) 99 return (TRUE); 100 *addrp = target = mem_alloc(nodesize); 101 if (target == NULL) { 102 warnx("xdr_array: out of memory"); 103 return (FALSE); 104 } 105 memset(target, 0, nodesize); 106 break; 107 108 case XDR_FREE: 109 return (TRUE); 110 111 case XDR_ENCODE: 112 break; 113 } 114 115 /* 116 * now we xdr each element of array 117 */ 118 for (i = 0; (i < c) && stat; i++) { 119 stat = (*elproc)(xdrs, target); 120 target += elsize; 121 } 122 123 /* 124 * the array may need freeing 125 */ 126 if (xdrs->x_op == XDR_FREE) { 127 mem_free(*addrp, nodesize); 128 *addrp = NULL; 129 } 130 return (stat); 131} 132 133/* 134 * xdr_vector(): 135 * 136 * XDR a fixed length array. Unlike variable-length arrays, 137 * the storage of fixed length arrays is static and unfreeable. 138 * > basep: base of the array 139 * > size: size of the array 140 * > elemsize: size of each element 141 * > xdr_elem: routine to XDR each element 142 */ 143bool_t 144xdr_vector(xdrs, basep, nelem, elemsize, xdr_elem) 145 XDR *xdrs; 146 char *basep; 147 u_int nelem; 148 u_int elemsize; 149 xdrproc_t xdr_elem; 150{ 151 u_int i; 152 char *elptr; 153 154 elptr = basep; 155 for (i = 0; i < nelem; i++) { 156 if (!(*xdr_elem)(xdrs, elptr)) { 157 return(FALSE); 158 } 159 elptr += elemsize; 160 } 161 return(TRUE); 162} 163