1 /* @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC */
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30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";
35 * xdr_stdio.c, XDR implementation on standard i/o file.
37 * Copyright (C) 1984, Sun Microsystems, Inc.
39 * This set of routines implements a XDR on a stdio stream.
40 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
44 #include <rpc/types.h>
48 static bool_t xdrstdio_getlong();
49 static bool_t xdrstdio_putlong();
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 long * xdrstdio_inline();
55 static void xdrstdio_destroy();
58 * Ops vector for stdio type XDR
60 static struct xdr_ops xdrstdio_ops = {
61 xdrstdio_getlong, /* deseraialize a long int */
62 xdrstdio_putlong, /* seraialize a long int */
63 xdrstdio_getbytes, /* deserialize counted bytes */
64 xdrstdio_putbytes, /* serialize counted bytes */
65 xdrstdio_getpos, /* get offset in the stream */
66 xdrstdio_setpos, /* set offset in the stream */
67 xdrstdio_inline, /* prime stream for inline macros */
68 xdrstdio_destroy /* destroy stream */
72 * Initialize a stdio xdr stream.
73 * Sets the xdr stream handle xdrs for use on the stream file.
74 * Operation flag is set to op.
77 xdrstdio_create(xdrs, file, op)
84 xdrs->x_ops = &xdrstdio_ops;
85 xdrs->x_private = (caddr_t)file;
91 * Destroy a stdio xdr stream.
92 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
95 xdrstdio_destroy(xdrs)
98 (void)fflush((FILE *)xdrs->x_private);
99 /* xx should we close the file ?? */
103 xdrstdio_getlong(xdrs, lp)
108 if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
117 xdrstdio_putlong(xdrs, lp)
123 long mycopy = htonl(*lp);
126 if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
132 xdrstdio_getbytes(xdrs, addr, len)
138 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
144 xdrstdio_putbytes(xdrs, addr, len)
150 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
156 xdrstdio_getpos(xdrs)
160 return ((u_int) ftell((FILE *)xdrs->x_private));
164 xdrstdio_setpos(xdrs, pos)
169 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
174 xdrstdio_inline(xdrs, len)
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.