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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 #ifdef AFS_XDR_64BITOPS
66 /* Windows does not support labeled assignments */
67 #if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
68 xdrstdio_getint32, /* deserialize an afs_int32 */
69 xdrstdio_putint32, /* serialize an afs_int32 */
71 xdrstdio_getbytes, /* deserialize counted bytes */
72 xdrstdio_putbytes, /* serialize counted bytes */
73 xdrstdio_getpos, /* get offset in the stream */
74 xdrstdio_setpos, /* set offset in the stream */
75 xdrstdio_inline, /* prime stream for inline macros */
76 xdrstdio_destroy, /* destroy stream */
77 #if (defined(KERNEL) && defined(AFS_SUN57_ENV))
79 xdrstdio_getint32, /* deserialize an afs_int32 */
80 xdrstdio_putint32, /* serialize an afs_int32 */
83 #ifdef AFS_XDR_64BITOPS
87 .x_getint32 = xdrstdio_getint32, /* deserialize an afs_int32 */
88 .x_putint32 = xdrstdio_putint32, /* serialize an afs_int32 */
89 .x_getbytes = xdrstdio_getbytes, /* deserialize counted bytes */
90 .x_putbytes = xdrstdio_putbytes, /* serialize counted bytes */
91 .x_getpos = xdrstdio_getpos, /* get offset in the stream */
92 .x_setpos = xdrstdio_setpos, /* set offset in the stream */
93 .x_inline = xdrstdio_inline, /* prime stream for inline macros */
94 .x_destroy = xdrstdio_destroy /* destroy stream */
99 * Initialize a stdio xdr stream.
100 * Sets the xdr stream handle xdrs for use on the stream file.
101 * Operation flag is set to op.
104 xdrstdio_create(xdrs, file, op)
111 xdrs->x_ops = &xdrstdio_ops;
112 xdrs->x_private = (caddr_t) file;
118 * Destroy a stdio xdr stream.
119 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
122 xdrstdio_destroy(xdrs)
125 (void)fflush((FILE *) xdrs->x_private);
126 /* xx should we close the file ?? */
130 xdrstdio_getint32(xdrs, lp)
135 if (fread((caddr_t) lp, sizeof(afs_int32), 1, (FILE *) xdrs->x_private) !=
145 xdrstdio_putint32(xdrs, lp)
151 afs_int32 mycopy = htonl(*lp);
154 if (fwrite((caddr_t) lp, sizeof(afs_int32), 1, (FILE *) xdrs->x_private)
161 xdrstdio_getbytes(xdrs, addr, len)
168 && (fread(addr, (int)len, 1, (FILE *) xdrs->x_private) != 1))
174 xdrstdio_putbytes(xdrs, addr, len)
181 && (fwrite(addr, (int)len, 1, (FILE *) xdrs->x_private) != 1))
187 xdrstdio_getpos(xdrs)
191 return ((u_int) ftell((FILE *) xdrs->x_private));
195 xdrstdio_setpos(xdrs, pos)
200 return ((fseek((FILE *) xdrs->x_private, (afs_int32) pos, 0) <
205 xdrstdio_inline(xdrs, len)
211 * Must do some work to implement this: must insure
212 * enough data in the underlying stdio buffer,
213 * that the buffer is aligned so that we can indirect through a
214 * afs_int32 *, and stuff this pointer in xdrs->x_buf. Doing
215 * a fread or fwrite to a scratch buffer would defeat
216 * most of the gains to be had here and require storage
217 * management on this buffer, so we don't do this.