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
xdr_array(xdrs,addrp,sizep,maxsize,elsize,elproc)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
xdr_vector(xdrs,basep,nelem,elemsize,xdr_elem)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