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29 #include <afsconfig.h>
30 #include <afs/param.h>
36 * xdr_stdio.c, XDR implementation on standard i/o file.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
40 * This set of routines implements a XDR on a stdio stream.
41 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
48 static bool_t
xdrstdio_getint32();
49 static bool_t
xdrstdio_putint32();
50 static bool_t
xdrstdio_getbytes();
51 static bool_t
xdrstdio_putbytes();
52 static u_int
xdrstdio_getpos();
53 static bool_t
xdrstdio_setpos();
54 static afs_int32
*xdrstdio_inline();
55 static void xdrstdio_destroy();
58 * Ops vector for stdio type XDR
60 static struct xdr_ops xdrstdio_ops
= {
62 /* Windows does not support labeled assignments */
63 #if !(defined(KERNEL) && defined(AFS_SUN5_ENV))
64 xdrstdio_getint32
, /* deserialize an afs_int32 */
65 xdrstdio_putint32
, /* serialize an afs_int32 */
67 xdrstdio_getbytes
, /* deserialize counted bytes */
68 xdrstdio_putbytes
, /* serialize counted bytes */
69 xdrstdio_getpos
, /* get offset in the stream */
70 xdrstdio_setpos
, /* set offset in the stream */
71 xdrstdio_inline
, /* prime stream for inline macros */
72 xdrstdio_destroy
, /* destroy stream */
73 #if (defined(KERNEL) && defined(AFS_SUN5_ENV))
75 xdrstdio_getint32
, /* deserialize an afs_int32 */
76 xdrstdio_putint32
, /* serialize an afs_int32 */
79 .x_getint32
= xdrstdio_getint32
, /* deserialize an afs_int32 */
80 .x_putint32
= xdrstdio_putint32
, /* serialize an afs_int32 */
81 .x_getbytes
= xdrstdio_getbytes
, /* deserialize counted bytes */
82 .x_putbytes
= xdrstdio_putbytes
, /* serialize counted bytes */
83 .x_getpos
= xdrstdio_getpos
, /* get offset in the stream */
84 .x_setpos
= xdrstdio_setpos
, /* set offset in the stream */
85 .x_inline
= xdrstdio_inline
, /* prime stream for inline macros */
86 .x_destroy
= xdrstdio_destroy
/* destroy stream */
91 * Initialize a stdio xdr stream.
92 * Sets the xdr stream handle xdrs for use on the stream file.
93 * Operation flag is set to op.
96 xdrstdio_create(xdrs
, file
, op
)
103 xdrs
->x_ops
= &xdrstdio_ops
;
104 xdrs
->x_private
= (caddr_t
) file
;
110 * Destroy a stdio xdr stream.
111 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
114 xdrstdio_destroy(xdrs
)
117 (void)fflush((FILE *) xdrs
->x_private
);
118 /* xx should we close the file ?? */
122 xdrstdio_getint32(xdrs
, lp
)
127 if (fread((caddr_t
) lp
, sizeof(afs_int32
), 1, (FILE *) xdrs
->x_private
) !=
137 xdrstdio_putint32(xdrs
, lp
)
143 afs_int32 mycopy
= htonl(*lp
);
146 if (fwrite((caddr_t
) lp
, sizeof(afs_int32
), 1, (FILE *) xdrs
->x_private
)
153 xdrstdio_getbytes(xdrs
, addr
, len
)
160 && (fread(addr
, (int)len
, 1, (FILE *) xdrs
->x_private
) != 1))
166 xdrstdio_putbytes(xdrs
, addr
, len
)
173 && (fwrite(addr
, (int)len
, 1, (FILE *) xdrs
->x_private
) != 1))
179 xdrstdio_getpos(xdrs
)
183 return ((u_int
) ftell((FILE *) xdrs
->x_private
));
187 xdrstdio_setpos(xdrs
, pos
)
192 return ((fseek((FILE *) xdrs
->x_private
, (afs_int32
) pos
, 0) <
197 xdrstdio_inline(xdrs
, len
)
203 * Must do some work to implement this: must insure
204 * enough data in the underlying stdio buffer,
205 * that the buffer is aligned so that we can indirect through a
206 * afs_int32 *, and stuff this pointer in xdrs->x_buf. Doing
207 * a fread or fwrite to a scratch buffer would defeat
208 * most of the gains to be had here and require storage
209 * management on this buffer, so we don't do this.