1 /* @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC */
2 /*
3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
4 * unrestricted use provided that this legend is included on all tape
5 * media and as a part of the software program in whole or part. Users
6 * may copy or modify Sun RPC without charge, but are not authorized
7 * to license or distribute it to anyone else except as part of a product or
8 * program developed by the user.
9 *
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 *
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
17 *
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
21 *
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
25 *
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
29 */
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";
32 #endif
33
34 /*
35 * xdr_stdio.c, XDR implementation on standard i/o file.
36 *
37 * Copyright (C) 1984, Sun Microsystems, Inc.
38 *
39 * This set of routines implements a XDR on a stdio stream.
40 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
41 * from the stream.
42 */
43
44 #include <rpc/types.h>
45 #include <stdio.h>
46 #include <rpc/xdr.h>
47
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();
56
57 /*
58 * Ops vector for stdio type XDR
59 */
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 */
69 };
70
71 /*
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.
75 */
76 void
xdrstdio_create(xdrs,file,op)77 xdrstdio_create(xdrs, file, op)
78 register XDR *xdrs;
79 FILE *file;
80 enum xdr_op op;
81 {
82
83 xdrs->x_op = op;
84 xdrs->x_ops = &xdrstdio_ops;
85 xdrs->x_private = (caddr_t)file;
86 xdrs->x_handy = 0;
87 xdrs->x_base = 0;
88 }
89
90 /*
91 * Destroy a stdio xdr stream.
92 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
93 */
94 static void
xdrstdio_destroy(xdrs)95 xdrstdio_destroy(xdrs)
96 register XDR *xdrs;
97 {
98 (void)fflush((FILE *)xdrs->x_private);
99 /* xx should we close the file ?? */
100 };
101
102 static bool_t
xdrstdio_getlong(xdrs,lp)103 xdrstdio_getlong(xdrs, lp)
104 XDR *xdrs;
105 register long *lp;
106 {
107
108 if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
109 return (FALSE);
110 #ifndef mc68000
111 *lp = ntohl(*lp);
112 #endif
113 return (TRUE);
114 }
115
116 static bool_t
xdrstdio_putlong(xdrs,lp)117 xdrstdio_putlong(xdrs, lp)
118 XDR *xdrs;
119 long *lp;
120 {
121
122 #ifndef mc68000
123 long mycopy = htonl(*lp);
124 lp = &mycopy;
125 #endif
126 if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
127 return (FALSE);
128 return (TRUE);
129 }
130
131 static bool_t
xdrstdio_getbytes(xdrs,addr,len)132 xdrstdio_getbytes(xdrs, addr, len)
133 XDR *xdrs;
134 caddr_t addr;
135 u_int len;
136 {
137
138 if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
139 return (FALSE);
140 return (TRUE);
141 }
142
143 static bool_t
xdrstdio_putbytes(xdrs,addr,len)144 xdrstdio_putbytes(xdrs, addr, len)
145 XDR *xdrs;
146 caddr_t addr;
147 u_int len;
148 {
149
150 if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
151 return (FALSE);
152 return (TRUE);
153 }
154
155 static u_int
xdrstdio_getpos(xdrs)156 xdrstdio_getpos(xdrs)
157 XDR *xdrs;
158 {
159
160 return ((u_int) ftell((FILE *)xdrs->x_private));
161 }
162
163 static bool_t
xdrstdio_setpos(xdrs,pos)164 xdrstdio_setpos(xdrs, pos)
165 XDR *xdrs;
166 u_int pos;
167 {
168
169 return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
170 FALSE : TRUE);
171 }
172
173 static long *
xdrstdio_inline(xdrs,len)174 xdrstdio_inline(xdrs, len)
175 XDR *xdrs;
176 u_int len;
177 {
178
179 /*
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.
187 */
188 return (NULL);
189 }
190