2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
29 * @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro
30 * @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC
31 * $FreeBSD: src/lib/libc/xdr/xdr_mem.c,v 1.8.2.1 2003/03/20 12:59:55 jedgar Exp $
32 * $DragonFly: src/lib/libc/xdr/xdr_mem.c,v 1.2 2003/06/17 04:26:47 dillon Exp $
36 * xdr_mem.h, XDR implementation using memory buffers.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
40 * If you have some data to be interpreted as external data representation
41 * or to be converted to external data representation in a memory buffer,
42 * then this is the package for you.
47 #include <rpc/types.h>
49 #include <netinet/in.h>
51 static bool_t xdrmem_getlong_aligned();
52 static bool_t xdrmem_putlong_aligned();
53 static bool_t xdrmem_getlong_unaligned();
54 static bool_t xdrmem_putlong_unaligned();
55 static bool_t xdrmem_getbytes();
56 static bool_t xdrmem_putbytes();
57 static u_int xdrmem_getpos(); /* XXX w/64-bit pointers, u_int not enough! */
58 static bool_t xdrmem_setpos();
59 static int32_t *xdrmem_inline_aligned();
60 static int32_t *xdrmem_inline_unaligned();
61 static void xdrmem_destroy();
63 static struct xdr_ops xdrmem_ops_aligned = {
64 xdrmem_getlong_aligned,
65 xdrmem_putlong_aligned,
70 xdrmem_inline_aligned,
74 static struct xdr_ops xdrmem_ops_unaligned = {
75 xdrmem_getlong_unaligned,
76 xdrmem_putlong_unaligned,
81 xdrmem_inline_unaligned,
86 * The procedure xdrmem_create initializes a stream descriptor for a
90 xdrmem_create(xdrs, addr, size, op)
98 xdrs->x_ops = ((size_t)addr & (sizeof(int32_t) - 1))
99 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned;
100 xdrs->x_private = xdrs->x_base = addr;
101 xdrs->x_handy = size;
105 xdrmem_destroy(/*xdrs*/)
112 xdrmem_getlong_aligned(xdrs, lp)
117 if (xdrs->x_handy < sizeof(int32_t))
119 xdrs->x_handy -= sizeof(int32_t);
120 *lp = ntohl(*(int32_t *)(xdrs->x_private));
121 xdrs->x_private += sizeof(int32_t);
126 xdrmem_putlong_aligned(xdrs, lp)
131 if (xdrs->x_handy < sizeof(int32_t))
133 xdrs->x_handy -= sizeof(int32_t);
134 *(int32_t *)xdrs->x_private = htonl(*lp);
135 xdrs->x_private += sizeof(int32_t);
140 xdrmem_getlong_unaligned(xdrs, lp)
146 if (xdrs->x_handy < sizeof(int32_t))
148 xdrs->x_handy -= sizeof(int32_t);
149 memcpy(&l, xdrs->x_private, sizeof(int32_t));
151 xdrs->x_private += sizeof(int32_t);
156 xdrmem_putlong_unaligned(xdrs, lp)
162 if (xdrs->x_handy < sizeof(int32_t))
164 xdrs->x_handy -= sizeof(int32_t);
166 memcpy(xdrs->x_private, &l, sizeof(int32_t));
167 xdrs->x_private += sizeof(int32_t);
172 xdrmem_getbytes(xdrs, addr, len)
178 if (xdrs->x_handy < len)
180 xdrs->x_handy -= len;
181 memcpy(addr, xdrs->x_private, len);
182 xdrs->x_private += len;
187 xdrmem_putbytes(xdrs, addr, len)
193 if (xdrs->x_handy < len)
195 xdrs->x_handy -= len;
196 memcpy(xdrs->x_private, addr, len);
197 xdrs->x_private += len;
206 /* XXX w/64-bit pointers, u_int not enough! */
207 return ((u_long)xdrs->x_private - (u_long)xdrs->x_base);
211 xdrmem_setpos(xdrs, pos)
215 register caddr_t newaddr = xdrs->x_base + pos;
216 register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
218 if (newaddr > lastaddr)
220 xdrs->x_private = newaddr;
221 xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
226 xdrmem_inline_aligned(xdrs, len)
232 if (xdrs->x_handy >= len) {
233 xdrs->x_handy -= len;
234 buf = (int32_t *) xdrs->x_private;
235 xdrs->x_private += len;
241 xdrmem_inline_unaligned(xdrs, len)