1 /* $NetBSD: xdr_stdio.c,v 1.14 2000/01/22 22:19:19 mycroft Exp $ */
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34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char *sccsid2 = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";
36 static char *sccsid = "@(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * xdr_stdio.c, XDR implementation on standard i/o file.
44 * This set of routines implements a XDR on a stdio stream.
45 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
49 #include "namespace.h"
52 #include <arpa/inet.h>
53 #include <rpc/types.h>
55 #include "un-namespace.h"
57 static void xdrstdio_destroy(XDR *);
58 static bool_t xdrstdio_getlong(XDR *, long *);
59 static bool_t xdrstdio_putlong(XDR *, const long *);
60 static bool_t xdrstdio_getbytes(XDR *, char *, u_int);
61 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int);
62 static u_int xdrstdio_getpos(XDR *);
63 static bool_t xdrstdio_setpos(XDR *, u_int);
64 static int32_t *xdrstdio_inline(XDR *, u_int);
67 * Ops vector for stdio type XDR
69 static const struct xdr_ops xdrstdio_ops = {
70 xdrstdio_getlong, /* deseraialize a long int */
71 xdrstdio_putlong, /* seraialize a long int */
72 xdrstdio_getbytes, /* deserialize counted bytes */
73 xdrstdio_putbytes, /* serialize counted bytes */
74 xdrstdio_getpos, /* get offset in the stream */
75 xdrstdio_setpos, /* set offset in the stream */
76 xdrstdio_inline, /* prime stream for inline macros */
77 xdrstdio_destroy /* destroy stream */
81 * Initialize a stdio xdr stream.
82 * Sets the xdr stream handle xdrs for use on the stream file.
83 * Operation flag is set to op.
86 xdrstdio_create(xdrs, file, op)
93 xdrs->x_ops = &xdrstdio_ops;
94 xdrs->x_private = file;
100 * Destroy a stdio xdr stream.
101 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
104 xdrstdio_destroy(xdrs)
107 (void)fflush((FILE *)xdrs->x_private);
108 /* XXX: should we close the file ?? */
112 xdrstdio_getlong(xdrs, lp)
118 if (fread(&temp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
120 *lp = (long)ntohl(temp);
125 xdrstdio_putlong(xdrs, lp)
129 int32_t mycopy = htonl((u_int32_t)*lp);
131 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
137 xdrstdio_getbytes(xdrs, addr, len)
143 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1))
149 xdrstdio_putbytes(xdrs, addr, len)
155 if ((len != 0) && (fwrite(addr, (size_t)len, 1,
156 (FILE *)xdrs->x_private) != 1))
162 xdrstdio_getpos(xdrs)
166 return ((u_int) ftell((FILE *)xdrs->x_private));
170 xdrstdio_setpos(xdrs, pos)
175 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
181 xdrstdio_inline(xdrs, len)
187 * Must do some work to implement this: must insure
188 * enough data in the underlying stdio buffer,
189 * that the buffer is aligned so that we can indirect through a
190 * long *, and stuff this pointer in xdrs->x_buf. Doing
191 * a fread or fwrite to a scratch buffer would defeat
192 * most of the gains to be had here and require storage
193 * management on this buffer, so we don't do this.