source: rtems/cpukit/librpc/src/xdr/xdr_mem.c @ f26145b

4.104.114.84.95
Last change on this file since f26145b was df49c60, checked in by Joel Sherrill <joel.sherrill@…>, on Jun 12, 2000 at 3:00:15 PM

Merged from 4.5.0-beta3a

  • Property mode set to 100644
File size: 5.5 KB
Line 
1/*
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.
8 *
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.
12 *
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.
16 *
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.
20 *
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.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
32/*static char *sccsid = "from: @(#)xdr_mem.c    2.1 88/07/29 4.0 RPCSRC";*/
33static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_mem.c,v 1.8 1999/08/28 00:02:56 peter Exp $";
34#endif
35
36/*
37 * xdr_mem.h, XDR implementation using memory buffers.
38 *
39 * Copyright (C) 1984, Sun Microsystems, Inc.
40 *
41 * If you have some data to be interpreted as external data representation
42 * or to be converted to external data representation in a memory buffer,
43 * then this is the package for you.
44 *
45 */
46
47#include <string.h>
48#include <rpc/types.h>
49#include <rpc/xdr.h>
50#include <netinet/in.h>
51
52static bool_t   xdrmem_getlong_aligned();
53static bool_t   xdrmem_putlong_aligned();
54static bool_t   xdrmem_getlong_unaligned();
55static bool_t   xdrmem_putlong_unaligned();
56static bool_t   xdrmem_getbytes();
57static bool_t   xdrmem_putbytes();
58static u_int    xdrmem_getpos(); /* XXX w/64-bit pointers, u_int not enough! */
59static bool_t   xdrmem_setpos();
60static int32_t *xdrmem_inline_aligned();
61static int32_t *xdrmem_inline_unaligned();
62static void     xdrmem_destroy();
63
64static struct   xdr_ops xdrmem_ops_aligned = {
65        xdrmem_getlong_aligned,
66        xdrmem_putlong_aligned,
67        xdrmem_getbytes,
68        xdrmem_putbytes,
69        xdrmem_getpos,
70        xdrmem_setpos,
71        xdrmem_inline_aligned,
72        xdrmem_destroy
73};
74
75static struct   xdr_ops xdrmem_ops_unaligned = {
76        xdrmem_getlong_unaligned,
77        xdrmem_putlong_unaligned,
78        xdrmem_getbytes,
79        xdrmem_putbytes,
80        xdrmem_getpos,
81        xdrmem_setpos,
82        xdrmem_inline_unaligned,
83        xdrmem_destroy
84};
85
86/*
87 * The procedure xdrmem_create initializes a stream descriptor for a
88 * memory buffer.
89 */
90void
91xdrmem_create(xdrs, addr, size, op)
92        register XDR *xdrs;
93        caddr_t addr;
94        u_int size;
95        enum xdr_op op;
96{
97
98        xdrs->x_op = op;
99        xdrs->x_ops = ((size_t)addr & (sizeof(int32_t) - 1))
100                ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned;
101        xdrs->x_private = xdrs->x_base = addr;
102        xdrs->x_handy = size;
103}
104
105static void
106xdrmem_destroy(/*xdrs*/)
107        /*XDR *xdrs;*/
108{
109
110}
111
112static bool_t
113xdrmem_getlong_aligned(xdrs, lp)
114        register XDR *xdrs;
115        long *lp;
116{
117
118        if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
119                return (FALSE);
120        *lp = ntohl(*(int32_t *)(xdrs->x_private));
121        xdrs->x_private += sizeof(int32_t);
122        return (TRUE);
123}
124
125static bool_t
126xdrmem_putlong_aligned(xdrs, lp)
127        register XDR *xdrs;
128        long *lp;
129{
130
131        if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
132                return (FALSE);
133        *(int32_t *)xdrs->x_private = htonl(*lp);
134        xdrs->x_private += sizeof(int32_t);
135        return (TRUE);
136}
137
138static bool_t
139xdrmem_getlong_unaligned(xdrs, lp)
140        register XDR *xdrs;
141        long *lp;
142{
143        int32_t l;
144
145        if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
146                return (FALSE);
147        memcpy(&l, xdrs->x_private, sizeof(int32_t));
148        *lp = ntohl(l);
149        xdrs->x_private += sizeof(int32_t);
150        return (TRUE);
151}
152
153static bool_t
154xdrmem_putlong_unaligned(xdrs, lp)
155        register XDR *xdrs;
156        long *lp;
157{
158        int32_t l;
159
160        if ((xdrs->x_handy -= sizeof(int32_t)) < 0)
161                return (FALSE);
162        l = htonl(*lp);
163        memcpy(xdrs->x_private, &l, sizeof(int32_t));
164        xdrs->x_private += sizeof(int32_t);
165        return (TRUE);
166}
167
168static bool_t
169xdrmem_getbytes(xdrs, addr, len)
170        register XDR *xdrs;
171        caddr_t addr;
172        register u_int len;
173{
174
175        if ((xdrs->x_handy -= len) < 0)
176                return (FALSE);
177        memcpy(addr, xdrs->x_private, len);
178        xdrs->x_private += len;
179        return (TRUE);
180}
181
182static bool_t
183xdrmem_putbytes(xdrs, addr, len)
184        register XDR *xdrs;
185        caddr_t addr;
186        register u_int len;
187{
188
189        if ((xdrs->x_handy -= len) < 0)
190                return (FALSE);
191        memcpy(xdrs->x_private, addr, len);
192        xdrs->x_private += len;
193        return (TRUE);
194}
195
196static u_int
197xdrmem_getpos(xdrs)
198        register XDR *xdrs;
199{
200
201        /* XXX w/64-bit pointers, u_int not enough! */
202        return ((u_long)xdrs->x_private - (u_long)xdrs->x_base);
203}
204
205static bool_t
206xdrmem_setpos(xdrs, pos)
207        register XDR *xdrs;
208        u_int pos;
209{
210        register caddr_t newaddr = xdrs->x_base + pos;
211        register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
212
213        if ((long)newaddr > (long)lastaddr)
214                return (FALSE);
215        xdrs->x_private = newaddr;
216        xdrs->x_handy = (long)lastaddr - (long)newaddr;
217        return (TRUE);
218}
219
220static int32_t *
221xdrmem_inline_aligned(xdrs, len)
222        register XDR *xdrs;
223        int len;
224{
225        int32_t *buf = 0;
226
227        if (xdrs->x_handy >= len) {
228                xdrs->x_handy -= len;
229                buf = (int32_t *) xdrs->x_private;
230                xdrs->x_private += len;
231        }
232        return (buf);
233}
234
235static int32_t *
236xdrmem_inline_unaligned(xdrs, len)
237        register XDR *xdrs;
238        int len;
239{
240       
241        return (0);
242}
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