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15637ed4 RG |
1 | /* |
2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
3 | * unrestricted use provided that this legend is included on all tape | |
4 | * media and as a part of the software program in whole or part. Users | |
5 | * may copy or modify Sun RPC without charge, but are not authorized | |
6 | * to license or distribute it to anyone else except as part of a product or | |
7 | * program developed by the user. | |
8 | * | |
9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
12 | * | |
13 | * Sun RPC is provided with no support and without any obligation on the | |
14 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
15 | * modification or enhancement. | |
16 | * | |
17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
19 | * OR ANY PART THEREOF. | |
20 | * | |
21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
22 | * or profits or other special, indirect and consequential damages, even if | |
23 | * Sun has been advised of the possibility of such damages. | |
24 | * | |
25 | * Sun Microsystems, Inc. | |
26 | * 2550 Garcia Avenue | |
27 | * Mountain View, California 94043 | |
28 | */ | |
d2bc008e C |
29 | |
30 | #if defined(LIBC_SCCS) && !defined(lint) | |
31 | /*static char *sccsid = "from: @(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";*/ | |
32 | /*static char *sccsid = "from: @(#)xdr_stdio.c 2.1 88/07/29 4.0 RPCSRC";*/ | |
33 | static char *rcsid = "$Id: xdr_stdio.c,v 1.3 1993/08/26 00:53:54 jtc Exp $"; | |
15637ed4 RG |
34 | #endif |
35 | ||
36 | /* | |
37 | * xdr_stdio.c, XDR implementation on standard i/o file. | |
38 | * | |
39 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
40 | * | |
41 | * This set of routines implements a XDR on a stdio stream. | |
42 | * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes | |
43 | * from the stream. | |
44 | */ | |
45 | ||
46 | #include <rpc/types.h> | |
47 | #include <stdio.h> | |
48 | #include <rpc/xdr.h> | |
49 | ||
50 | static bool_t xdrstdio_getlong(); | |
51 | static bool_t xdrstdio_putlong(); | |
52 | static bool_t xdrstdio_getbytes(); | |
53 | static bool_t xdrstdio_putbytes(); | |
54 | static u_int xdrstdio_getpos(); | |
55 | static bool_t xdrstdio_setpos(); | |
56 | static long * xdrstdio_inline(); | |
57 | static void xdrstdio_destroy(); | |
58 | ||
59 | /* | |
60 | * Ops vector for stdio type XDR | |
61 | */ | |
62 | static struct xdr_ops xdrstdio_ops = { | |
63 | xdrstdio_getlong, /* deseraialize a long int */ | |
64 | xdrstdio_putlong, /* seraialize a long int */ | |
65 | xdrstdio_getbytes, /* deserialize counted bytes */ | |
66 | xdrstdio_putbytes, /* serialize counted bytes */ | |
67 | xdrstdio_getpos, /* get offset in the stream */ | |
68 | xdrstdio_setpos, /* set offset in the stream */ | |
69 | xdrstdio_inline, /* prime stream for inline macros */ | |
70 | xdrstdio_destroy /* destroy stream */ | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Initialize a stdio xdr stream. | |
75 | * Sets the xdr stream handle xdrs for use on the stream file. | |
76 | * Operation flag is set to op. | |
77 | */ | |
78 | void | |
79 | xdrstdio_create(xdrs, file, op) | |
80 | register XDR *xdrs; | |
81 | FILE *file; | |
82 | enum xdr_op op; | |
83 | { | |
84 | ||
85 | xdrs->x_op = op; | |
86 | xdrs->x_ops = &xdrstdio_ops; | |
87 | xdrs->x_private = (caddr_t)file; | |
88 | xdrs->x_handy = 0; | |
89 | xdrs->x_base = 0; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Destroy a stdio xdr stream. | |
94 | * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. | |
95 | */ | |
96 | static void | |
97 | xdrstdio_destroy(xdrs) | |
98 | register XDR *xdrs; | |
99 | { | |
100 | (void)fflush((FILE *)xdrs->x_private); | |
101 | /* xx should we close the file ?? */ | |
102 | }; | |
103 | ||
104 | static bool_t | |
105 | xdrstdio_getlong(xdrs, lp) | |
106 | XDR *xdrs; | |
107 | register long *lp; | |
108 | { | |
109 | ||
110 | if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1) | |
111 | return (FALSE); | |
112 | #ifndef mc68000 | |
113 | *lp = ntohl(*lp); | |
114 | #endif | |
115 | return (TRUE); | |
116 | } | |
117 | ||
118 | static bool_t | |
119 | xdrstdio_putlong(xdrs, lp) | |
120 | XDR *xdrs; | |
121 | long *lp; | |
122 | { | |
123 | ||
124 | #ifndef mc68000 | |
125 | long mycopy = htonl(*lp); | |
126 | lp = &mycopy; | |
127 | #endif | |
128 | if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1) | |
129 | return (FALSE); | |
130 | return (TRUE); | |
131 | } | |
132 | ||
133 | static bool_t | |
134 | xdrstdio_getbytes(xdrs, addr, len) | |
135 | XDR *xdrs; | |
136 | caddr_t addr; | |
137 | u_int len; | |
138 | { | |
139 | ||
140 | if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) | |
141 | return (FALSE); | |
142 | return (TRUE); | |
143 | } | |
144 | ||
145 | static bool_t | |
146 | xdrstdio_putbytes(xdrs, addr, len) | |
147 | XDR *xdrs; | |
148 | caddr_t addr; | |
149 | u_int len; | |
150 | { | |
151 | ||
152 | if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1)) | |
153 | return (FALSE); | |
154 | return (TRUE); | |
155 | } | |
156 | ||
157 | static u_int | |
158 | xdrstdio_getpos(xdrs) | |
159 | XDR *xdrs; | |
160 | { | |
161 | ||
162 | return ((u_int) ftell((FILE *)xdrs->x_private)); | |
163 | } | |
164 | ||
165 | static bool_t | |
166 | xdrstdio_setpos(xdrs, pos) | |
167 | XDR *xdrs; | |
168 | u_int pos; | |
169 | { | |
170 | ||
171 | return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ? | |
172 | FALSE : TRUE); | |
173 | } | |
174 | ||
175 | static long * | |
176 | xdrstdio_inline(xdrs, len) | |
177 | XDR *xdrs; | |
178 | u_int len; | |
179 | { | |
180 | ||
181 | /* | |
182 | * Must do some work to implement this: must insure | |
183 | * enough data in the underlying stdio buffer, | |
184 | * that the buffer is aligned so that we can indirect through a | |
185 | * long *, and stuff this pointer in xdrs->x_buf. Doing | |
186 | * a fread or fwrite to a scratch buffer would defeat | |
187 | * most of the gains to be had here and require storage | |
188 | * management on this buffer, so we don't do this. | |
189 | */ | |
190 | return (NULL); | |
191 | } |