2 * xdr_stdio.c, XDR implementation on standard i/o file.
4 * Copyright (C) 1984, Sun Microsystems, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * This set of routines implements a XDR on a stdio stream.
34 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
38 #include <rpc/types.h>
43 # include <libio/iolibio.h>
44 # define fflush(s) INTUSE(_IO_fflush) (s)
45 # define fread(p, m, n, s) INTUSE(_IO_fread) (p, m, n, s)
46 # define ftell(s) INTUSE(_IO_ftell) (s)
47 # define fwrite(p, m, n, s) INTUSE(_IO_fwrite) (p, m, n, s)
50 static bool_t xdrstdio_getlong (XDR *, long *);
51 static bool_t xdrstdio_putlong (XDR *, const long *);
52 static bool_t xdrstdio_getbytes (XDR *, caddr_t, u_int);
53 static bool_t xdrstdio_putbytes (XDR *, const char *, u_int);
54 static u_int xdrstdio_getpos (const XDR *);
55 static bool_t xdrstdio_setpos (XDR *, u_int);
56 static int32_t *xdrstdio_inline (XDR *, u_int);
57 static void xdrstdio_destroy (XDR *);
58 static bool_t xdrstdio_getint32 (XDR *, int32_t *);
59 static bool_t xdrstdio_putint32 (XDR *, const int32_t *);
62 * Ops vector for stdio type XDR
64 static const struct xdr_ops xdrstdio_ops =
66 xdrstdio_getlong, /* deserialize a long int */
67 xdrstdio_putlong, /* serialize a long int */
68 xdrstdio_getbytes, /* deserialize counted bytes */
69 xdrstdio_putbytes, /* serialize counted bytes */
70 xdrstdio_getpos, /* get offset in the stream */
71 xdrstdio_setpos, /* set offset in the stream */
72 xdrstdio_inline, /* prime stream for inline macros */
73 xdrstdio_destroy, /* destroy stream */
74 xdrstdio_getint32, /* deserialize a int */
75 xdrstdio_putint32 /* serialize a int */
79 * Initialize a stdio xdr stream.
80 * Sets the xdr stream handle xdrs for use on the stream file.
81 * Operation flag is set to op.
84 xdrstdio_create (XDR *xdrs, FILE *file, enum xdr_op op)
87 /* We have to add the const since the `struct xdr_ops' in `struct XDR'
89 xdrs->x_ops = (struct xdr_ops *) &xdrstdio_ops;
90 xdrs->x_private = (caddr_t) file;
96 * Destroy a stdio xdr stream.
97 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
100 xdrstdio_destroy (XDR *xdrs)
102 (void) fflush ((FILE *) xdrs->x_private);
103 /* xx should we close the file ?? */
107 xdrstdio_getlong (XDR *xdrs, long *lp)
111 if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
113 *lp = (long) ntohl (mycopy);
118 xdrstdio_putlong (XDR *xdrs, const long *lp)
120 int32_t mycopy = htonl ((u_int32_t) *lp);
122 if (fwrite ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
128 xdrstdio_getbytes (XDR *xdrs, const caddr_t addr, u_int len)
130 if ((len != 0) && (fread (addr, (int) len, 1,
131 (FILE *) xdrs->x_private) != 1))
137 xdrstdio_putbytes (XDR *xdrs, const char *addr, u_int len)
139 if ((len != 0) && (fwrite (addr, (int) len, 1,
140 (FILE *) xdrs->x_private) != 1))
146 xdrstdio_getpos (const XDR *xdrs)
148 return (u_int) ftell ((FILE *) xdrs->x_private);
152 xdrstdio_setpos (XDR *xdrs, u_int pos)
154 return fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0 ? FALSE : TRUE;
158 xdrstdio_inline (XDR *xdrs, u_int len)
161 * Must do some work to implement this: must insure
162 * enough data in the underlying stdio buffer,
163 * that the buffer is aligned so that we can indirect through a
164 * long *, and stuff this pointer in xdrs->x_buf. Doing
165 * a fread or fwrite to a scratch buffer would defeat
166 * most of the gains to be had here and require storage
167 * management on this buffer, so we don't do this.
173 xdrstdio_getint32 (XDR *xdrs, int32_t *ip)
177 if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
179 *ip = ntohl (mycopy);
184 xdrstdio_putint32 (XDR *xdrs, const int32_t *ip)
186 int32_t mycopy = htonl (*ip);
189 if (fwrite ((caddr_t) ip, 4, 1, (FILE *) xdrs->x_private) != 1)
194 libc_hidden_def (xdrstdio_create)