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 (XDR *, long *);
49 static bool_t xdrstdio_putlong (XDR *, const long *);
50 static bool_t xdrstdio_getbytes (XDR *, caddr_t, u_int);
51 static bool_t xdrstdio_putbytes (XDR *, const char *, u_int);
52 static u_int xdrstdio_getpos (const XDR *);
53 static bool_t xdrstdio_setpos (XDR *, u_int);
54 static long *xdrstdio_inline (XDR *, int);
55 static void xdrstdio_destroy (XDR *);
58 * Ops vector for stdio type XDR
60 static const struct xdr_ops xdrstdio_ops =
62 xdrstdio_getlong, /* deserialize a long int */
63 xdrstdio_putlong, /* serialize 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 /* We have to add the const since the `struct xdr_ops' in `struct XDR'
87 xdrs->x_ops = (struct xdr_ops *) &xdrstdio_ops;
88 xdrs->x_private = (caddr_t) file;
94 * Destroy a stdio xdr stream.
95 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
98 xdrstdio_destroy (xdrs)
101 (void) fflush ((FILE *) xdrs->x_private);
102 /* xx should we close the file ?? */
106 xdrstdio_getlong (xdrs, lp)
112 if (fread ((caddr_t) & mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)
114 *lp = (int32_t) ntohl (mycopy);
119 xdrstdio_putlong (XDR *xdrs, const long *lp)
122 long mycopy = htonl (*lp);
124 if (fwrite ((caddr_t) lp, 4, 1, (FILE *) xdrs->x_private) != 1)
130 xdrstdio_getbytes (xdrs, addr, len)
136 if ((len != 0) && (fread (addr, (int) len, 1, (FILE *) xdrs->x_private) != 1))
142 xdrstdio_putbytes (XDR *xdrs, const char *addr, u_int len)
144 if ((len != 0) && (fwrite (addr, (int) len, 1, (FILE *) xdrs->x_private) != 1))
150 xdrstdio_getpos (const XDR *xdrs)
152 return (u_int) ftell ((FILE *) xdrs->x_private);
156 xdrstdio_setpos (XDR *xdrs, u_int pos)
158 return fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0 ? FALSE : TRUE;
162 xdrstdio_inline (XDR *xdrs, int len)
166 * Must do some work to implement this: must insure
167 * enough data in the underlying stdio buffer,
168 * that the buffer is aligned so that we can indirect through a
169 * long *, and stuff this pointer in xdrs->x_buf. Doing
170 * a fread or fwrite to a scratch buffer would defeat
171 * most of the gains to be had here and require storage
172 * management on this buffer, so we don't do this.