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