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29 #include <sys/cdefs.h>
32 * xdr_stdio.c, XDR implementation on standard i/o file.
34 * Copyright (C) 1984, Sun Microsystems, Inc.
36 * This set of routines implements a XDR on a stdio stream.
37 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
41 #include "namespace.h"
44 #include <arpa/inet.h>
45 #include <rpc/types.h>
47 #include "un-namespace.h"
49 static void xdrstdio_destroy(XDR *);
50 static bool_t xdrstdio_getlong(XDR *, long *);
51 static bool_t xdrstdio_putlong(XDR *, const long *);
52 static bool_t xdrstdio_getbytes(XDR *, char *, u_int);
53 static bool_t xdrstdio_putbytes(XDR *, const char *, u_int);
54 static u_int xdrstdio_getpos(XDR *);
55 static bool_t xdrstdio_setpos(XDR *, u_int);
56 static int32_t *xdrstdio_inline(XDR *, u_int);
59 * Ops vector for stdio type XDR
61 static const struct xdr_ops xdrstdio_ops = {
62 xdrstdio_getlong, /* deseraialize a long int */
63 xdrstdio_putlong, /* seraialize a long int */
64 xdrstdio_getbytes, /* deserialize counted bytes */
65 xdrstdio_putbytes, /* serialize counted bytes */
66 xdrstdio_getpos, /* get offset in the stream */
67 xdrstdio_setpos, /* set offset in the stream */
68 xdrstdio_inline, /* prime stream for inline macros */
69 xdrstdio_destroy /* destroy stream */
73 * Initialize a stdio xdr stream.
74 * Sets the xdr stream handle xdrs for use on the stream file.
75 * Operation flag is set to op.
78 xdrstdio_create(xdrs, file, op)
85 xdrs->x_ops = &xdrstdio_ops;
86 xdrs->x_private = file;
92 * Destroy a stdio xdr stream.
93 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
96 xdrstdio_destroy(xdrs)
99 (void)fflush((FILE *)xdrs->x_private);
100 /* XXX: should we close the file ?? */
104 xdrstdio_getlong(xdrs, lp)
109 if (fread(lp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
111 *lp = (long)ntohl((u_int32_t)*lp);
116 xdrstdio_putlong(xdrs, lp)
120 long mycopy = (long)htonl((u_int32_t)*lp);
122 if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
128 xdrstdio_getbytes(xdrs, addr, len)
134 if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1))
140 xdrstdio_putbytes(xdrs, addr, len)
146 if ((len != 0) && (fwrite(addr, (size_t)len, 1,
147 (FILE *)xdrs->x_private) != 1))
153 xdrstdio_getpos(xdrs)
157 return ((u_int) ftell((FILE *)xdrs->x_private));
161 xdrstdio_setpos(xdrs, pos)
166 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
172 xdrstdio_inline(xdrs, len)
178 * Must do some work to implement this: must insure
179 * enough data in the underlying stdio buffer,
180 * that the buffer is aligned so that we can indirect through a
181 * long *, and stuff this pointer in xdrs->x_buf. Doing
182 * a fread or fwrite to a scratch buffer would defeat
183 * most of the gains to be had here and require storage
184 * management on this buffer, so we don't do this.