1 /* $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ */
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.
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.
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.
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.
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.
27 * Sun Microsystems, Inc.
29 * Mountain View, California 94043
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char *sccsid2 = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";
34 static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
40 * xdr_mem.h, XDR implementation using memory buffers.
42 * Copyright (C) 1984, Sun Microsystems, Inc.
44 * If you have some data to be interpreted as external data representation
45 * or to be converted to external data representation in a memory buffer,
46 * then this is the package for you.
50 #include "namespace.h"
51 #include <sys/types.h>
53 #include <netinet/in.h>
57 #include <rpc/types.h>
59 #include "un-namespace.h"
61 static void xdrmem_destroy(XDR *);
62 static bool_t xdrmem_getlong_aligned(XDR *, long *);
63 static bool_t xdrmem_putlong_aligned(XDR *, const long *);
64 static bool_t xdrmem_getlong_unaligned(XDR *, long *);
65 static bool_t xdrmem_putlong_unaligned(XDR *, const long *);
66 static bool_t xdrmem_getbytes(XDR *, char *, u_int);
67 static bool_t xdrmem_putbytes(XDR *, const char *, u_int);
68 /* XXX: w/64-bit pointers, u_int not enough! */
69 static u_int xdrmem_getpos(XDR *);
70 static bool_t xdrmem_setpos(XDR *, u_int);
71 static int32_t *xdrmem_inline_aligned(XDR *, u_int);
72 static int32_t *xdrmem_inline_unaligned(XDR *, u_int);
74 static const struct xdr_ops xdrmem_ops_aligned = {
75 xdrmem_getlong_aligned,
76 xdrmem_putlong_aligned,
81 xdrmem_inline_aligned,
85 static const struct xdr_ops xdrmem_ops_unaligned = {
86 xdrmem_getlong_unaligned,
87 xdrmem_putlong_unaligned,
92 xdrmem_inline_unaligned,
97 * The procedure xdrmem_create initializes a stream descriptor for a
101 xdrmem_create(xdrs, addr, size, op)
109 xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1))
110 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned;
111 xdrs->x_private = xdrs->x_base = addr;
112 xdrs->x_handy = size;
124 xdrmem_getlong_aligned(xdrs, lp)
129 if (xdrs->x_handy < sizeof(int32_t))
131 xdrs->x_handy -= sizeof(int32_t);
132 *lp = ntohl(*(u_int32_t *)xdrs->x_private);
133 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
138 xdrmem_putlong_aligned(xdrs, lp)
143 if (xdrs->x_handy < sizeof(int32_t))
145 xdrs->x_handy -= sizeof(int32_t);
146 *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp);
147 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
152 xdrmem_getlong_unaligned(xdrs, lp)
158 if (xdrs->x_handy < sizeof(int32_t))
160 xdrs->x_handy -= sizeof(int32_t);
161 memmove(&l, xdrs->x_private, sizeof(int32_t));
163 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
168 xdrmem_putlong_unaligned(xdrs, lp)
174 if (xdrs->x_handy < sizeof(int32_t))
176 xdrs->x_handy -= sizeof(int32_t);
177 l = htonl((u_int32_t)*lp);
178 memmove(xdrs->x_private, &l, sizeof(int32_t));
179 xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
184 xdrmem_getbytes(xdrs, addr, len)
190 if (xdrs->x_handy < len)
192 xdrs->x_handy -= len;
193 memmove(addr, xdrs->x_private, len);
194 xdrs->x_private = (char *)xdrs->x_private + len;
199 xdrmem_putbytes(xdrs, addr, len)
205 if (xdrs->x_handy < len)
207 xdrs->x_handy -= len;
208 memmove(xdrs->x_private, addr, len);
209 xdrs->x_private = (char *)xdrs->x_private + len;
218 /* XXX w/64-bit pointers, u_int not enough! */
219 return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base);
223 xdrmem_setpos(xdrs, pos)
227 char *newaddr = xdrs->x_base + pos;
228 char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy;
230 if (newaddr > lastaddr)
232 xdrs->x_private = newaddr;
233 xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
238 xdrmem_inline_aligned(xdrs, len)
244 if (xdrs->x_handy >= len) {
245 xdrs->x_handy -= len;
246 buf = (int32_t *)xdrs->x_private;
247 xdrs->x_private = (char *)xdrs->x_private + len;
254 xdrmem_inline_unaligned(xdrs, len)