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 1.4 2005/12/05 00:47:57 swildner 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(XDR *, long *);
52 static bool_t xdrmem_putlong_aligned(XDR *, long *);
53 static bool_t xdrmem_getlong_unaligned(XDR *, long *);
54 static bool_t xdrmem_putlong_unaligned(XDR *, long *);
55 static bool_t xdrmem_getbytes(XDR *, caddr_t, u_int);
56 static bool_t xdrmem_putbytes(XDR *, caddr_t, u_int);
57 static u_int xdrmem_getpos(XDR *); /* XXX w/64-bit pointers, u_int not enough! */
58 static bool_t xdrmem_setpos(XDR *, u_int);
59 static int32_t *xdrmem_inline_aligned(XDR *, int);
60 static int32_t *xdrmem_inline_unaligned(XDR *, int);
61 static void xdrmem_destroy(void);
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(XDR *xdrs, caddr_t addr, u_int size, enum xdr_op op)
94 xdrs->x_ops = ((size_t)addr & (sizeof(int32_t) - 1))
95 ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned;
96 xdrs->x_private = xdrs->x_base = addr;
106 xdrmem_getlong_aligned(XDR *xdrs, long *lp)
109 if (xdrs->x_handy < sizeof(int32_t))
111 xdrs->x_handy -= sizeof(int32_t);
112 *lp = ntohl(*(int32_t *)(xdrs->x_private));
113 xdrs->x_private += sizeof(int32_t);
118 xdrmem_putlong_aligned(XDR *xdrs, long *lp)
121 if (xdrs->x_handy < sizeof(int32_t))
123 xdrs->x_handy -= sizeof(int32_t);
124 *(int32_t *)xdrs->x_private = htonl(*lp);
125 xdrs->x_private += sizeof(int32_t);
130 xdrmem_getlong_unaligned(XDR *xdrs, long *lp)
134 if (xdrs->x_handy < sizeof(int32_t))
136 xdrs->x_handy -= sizeof(int32_t);
137 memcpy(&l, xdrs->x_private, sizeof(int32_t));
139 xdrs->x_private += sizeof(int32_t);
144 xdrmem_putlong_unaligned(XDR *xdrs, long *lp)
148 if (xdrs->x_handy < sizeof(int32_t))
150 xdrs->x_handy -= sizeof(int32_t);
152 memcpy(xdrs->x_private, &l, sizeof(int32_t));
153 xdrs->x_private += sizeof(int32_t);
158 xdrmem_getbytes(XDR *xdrs, caddr_t addr, u_int len)
161 if (xdrs->x_handy < len)
163 xdrs->x_handy -= len;
164 memcpy(addr, xdrs->x_private, len);
165 xdrs->x_private += len;
170 xdrmem_putbytes(XDR *xdrs, caddr_t addr, u_int len)
173 if (xdrs->x_handy < len)
175 xdrs->x_handy -= len;
176 memcpy(xdrs->x_private, addr, len);
177 xdrs->x_private += len;
182 xdrmem_getpos(XDR *xdrs)
185 /* XXX w/64-bit pointers, u_int not enough! */
186 return ((u_long)xdrs->x_private - (u_long)xdrs->x_base);
190 xdrmem_setpos(XDR *xdrs, u_int pos)
192 caddr_t newaddr = xdrs->x_base + pos;
193 caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
195 if (newaddr > lastaddr)
197 xdrs->x_private = newaddr;
198 xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
203 xdrmem_inline_aligned(XDR *xdrs, int len)
207 if (xdrs->x_handy >= len) {
208 xdrs->x_handy -= len;
209 buf = (int32_t *) xdrs->x_private;
210 xdrs->x_private += len;
216 xdrmem_inline_unaligned(XDR *xdrs __unused, int len __unused)