source: rtems/cpukit/librpc/src/xdr/xdr_stdio.c @ 845f170a

4.104.114.84.95
Last change on this file since 845f170a was df49c60, checked in by Joel Sherrill <joel.sherrill@…>, on 06/12/00 at 15:00:15

Merged from 4.5.0-beta3a

  • Property mode set to 100644
File size: 4.7 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_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/
32/*static char *sccsid = "from: @(#)xdr_stdio.c  2.1 88/07/29 4.0 RPCSRC";*/
33static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_stdio.c,v 1.7 1999/08/28 00:02:56 peter Exp $";
34#endif
35
36/*
37 * xdr_stdio.c, XDR implementation on standard i/o file.
38 *
39 * Copyright (C) 1984, Sun Microsystems, Inc.
40 *
41 * This set of routines implements a XDR on a stdio stream.
42 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
43 * from the stream.
44 */
45
46#include <rpc/types.h>
47#include <stdio.h>
48#include <rpc/xdr.h>
49
50static bool_t   xdrstdio_getlong();
51static bool_t   xdrstdio_putlong();
52static bool_t   xdrstdio_getbytes();
53static bool_t   xdrstdio_putbytes();
54static u_int    xdrstdio_getpos();
55static bool_t   xdrstdio_setpos();
56static int32_t *xdrstdio_inline();
57static void     xdrstdio_destroy();
58
59/*
60 * Ops vector for stdio type XDR
61 */
62static struct xdr_ops   xdrstdio_ops = {
63        xdrstdio_getlong,       /* deseraialize a long int */
64        xdrstdio_putlong,       /* seraialize a long int */
65        xdrstdio_getbytes,      /* deserialize counted bytes */
66        xdrstdio_putbytes,      /* serialize counted bytes */
67        xdrstdio_getpos,        /* get offset in the stream */
68        xdrstdio_setpos,        /* set offset in the stream */
69        xdrstdio_inline,        /* prime stream for inline macros */
70        xdrstdio_destroy        /* destroy stream */
71};
72
73/*
74 * Initialize a stdio xdr stream.
75 * Sets the xdr stream handle xdrs for use on the stream file.
76 * Operation flag is set to op.
77 */
78void
79xdrstdio_create(xdrs, file, op)
80        register XDR *xdrs;
81        FILE *file;
82        enum xdr_op op;
83{
84
85        xdrs->x_op = op;
86        xdrs->x_ops = &xdrstdio_ops;
87        xdrs->x_private = (caddr_t)file;
88        xdrs->x_handy = 0;
89        xdrs->x_base = 0;
90}
91
92/*
93 * Destroy a stdio xdr stream.
94 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
95 */
96static void
97xdrstdio_destroy(xdrs)
98        register XDR *xdrs;
99{
100        (void)fflush((FILE *)xdrs->x_private);
101        /* xx should we close the file ?? */
102}
103
104static bool_t
105xdrstdio_getlong(xdrs, lp)
106        XDR *xdrs;
107        register long *lp;
108{
109
110        if (fread((caddr_t)lp, sizeof(int32_t), 1,
111                (FILE *)xdrs->x_private) != 1)
112                return (FALSE);
113        *lp = (long)ntohl((int32_t)*lp);
114        return (TRUE);
115}
116
117static bool_t
118xdrstdio_putlong(xdrs, lp)
119        XDR *xdrs;
120        long *lp;
121{
122
123        long mycopy = (long)htonl((int32_t)*lp);
124
125        if (fwrite((caddr_t)&mycopy, sizeof(int32_t), 1,
126                (FILE *)xdrs->x_private) != 1)
127                return (FALSE);
128        return (TRUE);
129}
130
131static bool_t
132xdrstdio_getbytes(xdrs, addr, len)
133        XDR *xdrs;
134        caddr_t addr;
135        u_int len;
136{
137
138        if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
139                return (FALSE);
140        return (TRUE);
141}
142
143static bool_t
144xdrstdio_putbytes(xdrs, addr, len)
145        XDR *xdrs;
146        caddr_t addr;
147        u_int len;
148{
149
150        if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
151                return (FALSE);
152        return (TRUE);
153}
154
155static u_int
156xdrstdio_getpos(xdrs)
157        XDR *xdrs;
158{
159
160        return ((u_int) ftell((FILE *)xdrs->x_private));
161}
162
163static bool_t
164xdrstdio_setpos(xdrs, pos)
165        XDR *xdrs;
166        u_int pos;
167{
168
169        return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
170                FALSE : TRUE);
171}
172
173static int32_t *
174xdrstdio_inline(xdrs, len)
175        XDR *xdrs;
176        u_int len;
177{
178
179        /*
180         * Must do some work to implement this: must insure
181         * enough data in the underlying stdio buffer,
182         * that the buffer is aligned so that we can indirect through a
183         * long *, and stuff this pointer in xdrs->x_buf.  Doing
184         * a fread or fwrite to a scratch buffer would defeat
185         * most of the gains to be had here and require storage
186         * management on this buffer, so we don't do this.
187         */
188        return (NULL);
189}
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