1177633Sdfr/* $NetBSD: xdr_array.c,v 1.12 2000/01/22 22:19:18 mycroft Exp $ */ 2177633Sdfr 3177633Sdfr/* 4177633Sdfr * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5177633Sdfr * unrestricted use provided that this legend is included on all tape 6177633Sdfr * media and as a part of the software program in whole or part. Users 7177633Sdfr * may copy or modify Sun RPC without charge, but are not authorized 8177633Sdfr * to license or distribute it to anyone else except as part of a product or 9177633Sdfr * program developed by the user. 10177633Sdfr * 11177633Sdfr * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12177633Sdfr * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13177633Sdfr * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14177633Sdfr * 15177633Sdfr * Sun RPC is provided with no support and without any obligation on the 16177633Sdfr * part of Sun Microsystems, Inc. to assist in its use, correction, 17177633Sdfr * modification or enhancement. 18177633Sdfr * 19177633Sdfr * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20177633Sdfr * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21177633Sdfr * OR ANY PART THEREOF. 22177633Sdfr * 23177633Sdfr * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24177633Sdfr * or profits or other special, indirect and consequential damages, even if 25177633Sdfr * Sun has been advised of the possibility of such damages. 26177633Sdfr * 27177633Sdfr * Sun Microsystems, Inc. 28177633Sdfr * 2550 Garcia Avenue 29177633Sdfr * Mountain View, California 94043 30177633Sdfr */ 31177633Sdfr 32177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 33177633Sdfrstatic char *sccsid2 = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro"; 34177633Sdfrstatic char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC"; 35177633Sdfr#endif 36177633Sdfr#include <sys/cdefs.h> 37177633Sdfr__FBSDID("$FreeBSD$"); 38177633Sdfr 39177633Sdfr/* 40177633Sdfr * xdr_array.c, Generic XDR routines impelmentation. 41177633Sdfr * 42177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 43177633Sdfr * 44177633Sdfr * These are the "non-trivial" xdr primitives used to serialize and de-serialize 45177633Sdfr * arrays. See xdr.h for more info on the interface to xdr. 46177633Sdfr */ 47177633Sdfr 48177633Sdfr#include <sys/param.h> 49177633Sdfr#include <sys/systm.h> 50177633Sdfr#include <sys/limits.h> 51177633Sdfr#include <sys/malloc.h> 52177633Sdfr 53177633Sdfr#include <rpc/types.h> 54177633Sdfr#include <rpc/xdr.h> 55177633Sdfr 56177633Sdfr/* 57177633Sdfr * XDR an array of arbitrary elements 58177633Sdfr * *addrp is a pointer to the array, *sizep is the number of elements. 59177633Sdfr * If addrp is NULL (*sizep * elsize) bytes are allocated. 60177633Sdfr * elsize is the size (in bytes) of each element, and elproc is the 61177633Sdfr * xdr procedure to call to handle each element of the array. 62177633Sdfr */ 63177633Sdfrbool_t 64177633Sdfrxdr_array(XDR *xdrs, 65177633Sdfr caddr_t *addrp, /* array pointer */ 66177633Sdfr u_int *sizep, /* number of elements */ 67177633Sdfr u_int maxsize, /* max numberof elements */ 68177633Sdfr u_int elsize, /* size in bytes of each element */ 69177633Sdfr xdrproc_t elproc) /* xdr routine to handle each element */ 70177633Sdfr{ 71177633Sdfr u_int i; 72177633Sdfr caddr_t target = *addrp; 73177633Sdfr u_int c; /* the actual element count */ 74177633Sdfr bool_t stat = TRUE; 75177633Sdfr u_int nodesize; 76177633Sdfr 77177633Sdfr /* like strings, arrays are really counted arrays */ 78177633Sdfr if (!xdr_u_int(xdrs, sizep)) { 79177633Sdfr return (FALSE); 80177633Sdfr } 81177633Sdfr c = *sizep; 82177633Sdfr if ((c > maxsize || UINT_MAX/elsize < c) && 83177633Sdfr (xdrs->x_op != XDR_FREE)) { 84177633Sdfr return (FALSE); 85177633Sdfr } 86177633Sdfr nodesize = c * elsize; 87177633Sdfr 88177633Sdfr /* 89177633Sdfr * if we are deserializing, we may need to allocate an array. 90177633Sdfr * We also save time by checking for a null array if we are freeing. 91177633Sdfr */ 92177633Sdfr if (target == NULL) 93177633Sdfr switch (xdrs->x_op) { 94177633Sdfr case XDR_DECODE: 95177633Sdfr if (c == 0) 96177633Sdfr return (TRUE); 97177633Sdfr *addrp = target = mem_alloc(nodesize); 98177633Sdfr if (target == NULL) { 99177633Sdfr printf("xdr_array: out of memory"); 100177633Sdfr return (FALSE); 101177633Sdfr } 102177633Sdfr memset(target, 0, nodesize); 103177633Sdfr break; 104177633Sdfr 105177633Sdfr case XDR_FREE: 106177633Sdfr return (TRUE); 107177633Sdfr 108177633Sdfr case XDR_ENCODE: 109177633Sdfr break; 110177633Sdfr } 111177633Sdfr 112177633Sdfr /* 113177633Sdfr * now we xdr each element of array 114177633Sdfr */ 115177633Sdfr for (i = 0; (i < c) && stat; i++) { 116177633Sdfr stat = (*elproc)(xdrs, target); 117177633Sdfr target += elsize; 118177633Sdfr } 119177633Sdfr 120177633Sdfr /* 121177633Sdfr * the array may need freeing 122177633Sdfr */ 123177633Sdfr if (xdrs->x_op == XDR_FREE) { 124177633Sdfr mem_free(*addrp, nodesize); 125177633Sdfr *addrp = NULL; 126177633Sdfr } 127177633Sdfr return (stat); 128177633Sdfr} 129177633Sdfr 130177633Sdfr/* 131177633Sdfr * xdr_vector(): 132177633Sdfr * 133177633Sdfr * XDR a fixed length array. Unlike variable-length arrays, 134177633Sdfr * the storage of fixed length arrays is static and unfreeable. 135177633Sdfr * > basep: base of the array 136177633Sdfr * > size: size of the array 137177633Sdfr * > elemsize: size of each element 138177633Sdfr * > xdr_elem: routine to XDR each element 139177633Sdfr */ 140177633Sdfrbool_t 141177633Sdfrxdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize, 142177633Sdfr xdrproc_t xdr_elem) 143177633Sdfr{ 144177633Sdfr u_int i; 145177633Sdfr char *elptr; 146177633Sdfr 147177633Sdfr elptr = basep; 148177633Sdfr for (i = 0; i < nelem; i++) { 149177633Sdfr if (!(*xdr_elem)(xdrs, elptr)) { 150177633Sdfr return(FALSE); 151177633Sdfr } 152177633Sdfr elptr += elemsize; 153177633Sdfr } 154177633Sdfr return(TRUE); 155177633Sdfr} 156