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15637ed4 RG |
1 | /* @(#)xdr_mem.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_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; | |
32 | #endif | |
33 | ||
34 | /* | |
35 | * xdr_mem.h, XDR implementation using memory buffers. | |
36 | * | |
37 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
38 | * | |
39 | * If you have some data to be interpreted as external data representation | |
40 | * or to be converted to external data representation in a memory buffer, | |
41 | * then this is the package for you. | |
42 | * | |
43 | */ | |
44 | ||
45 | ||
46 | #include <rpc/types.h> | |
47 | #include <rpc/xdr.h> | |
48 | #include <netinet/in.h> | |
49 | ||
50 | static bool_t xdrmem_getlong(); | |
51 | static bool_t xdrmem_putlong(); | |
52 | static bool_t xdrmem_getbytes(); | |
53 | static bool_t xdrmem_putbytes(); | |
54 | static u_int xdrmem_getpos(); | |
55 | static bool_t xdrmem_setpos(); | |
56 | static long * xdrmem_inline(); | |
57 | static void xdrmem_destroy(); | |
58 | ||
59 | static struct xdr_ops xdrmem_ops = { | |
60 | xdrmem_getlong, | |
61 | xdrmem_putlong, | |
62 | xdrmem_getbytes, | |
63 | xdrmem_putbytes, | |
64 | xdrmem_getpos, | |
65 | xdrmem_setpos, | |
66 | xdrmem_inline, | |
67 | xdrmem_destroy | |
68 | }; | |
69 | ||
70 | /* | |
71 | * The procedure xdrmem_create initializes a stream descriptor for a | |
72 | * memory buffer. | |
73 | */ | |
74 | void | |
75 | xdrmem_create(xdrs, addr, size, op) | |
76 | register XDR *xdrs; | |
77 | caddr_t addr; | |
78 | u_int size; | |
79 | enum xdr_op op; | |
80 | { | |
81 | ||
82 | xdrs->x_op = op; | |
83 | xdrs->x_ops = &xdrmem_ops; | |
84 | xdrs->x_private = xdrs->x_base = addr; | |
85 | xdrs->x_handy = size; | |
86 | } | |
87 | ||
88 | static void | |
89 | xdrmem_destroy(/*xdrs*/) | |
90 | /*XDR *xdrs;*/ | |
91 | { | |
92 | } | |
93 | ||
94 | static bool_t | |
95 | xdrmem_getlong(xdrs, lp) | |
96 | register XDR *xdrs; | |
97 | long *lp; | |
98 | { | |
99 | ||
100 | if ((xdrs->x_handy -= sizeof(long)) < 0) | |
101 | return (FALSE); | |
102 | *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); | |
103 | xdrs->x_private += sizeof(long); | |
104 | return (TRUE); | |
105 | } | |
106 | ||
107 | static bool_t | |
108 | xdrmem_putlong(xdrs, lp) | |
109 | register XDR *xdrs; | |
110 | long *lp; | |
111 | { | |
112 | ||
113 | if ((xdrs->x_handy -= sizeof(long)) < 0) | |
114 | return (FALSE); | |
115 | *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); | |
116 | xdrs->x_private += sizeof(long); | |
117 | return (TRUE); | |
118 | } | |
119 | ||
120 | static bool_t | |
121 | xdrmem_getbytes(xdrs, addr, len) | |
122 | register XDR *xdrs; | |
123 | caddr_t addr; | |
124 | register u_int len; | |
125 | { | |
126 | ||
127 | if ((xdrs->x_handy -= len) < 0) | |
128 | return (FALSE); | |
129 | bcopy(xdrs->x_private, addr, len); | |
130 | xdrs->x_private += len; | |
131 | return (TRUE); | |
132 | } | |
133 | ||
134 | static bool_t | |
135 | xdrmem_putbytes(xdrs, addr, len) | |
136 | register XDR *xdrs; | |
137 | caddr_t addr; | |
138 | register u_int len; | |
139 | { | |
140 | ||
141 | if ((xdrs->x_handy -= len) < 0) | |
142 | return (FALSE); | |
143 | bcopy(addr, xdrs->x_private, len); | |
144 | xdrs->x_private += len; | |
145 | return (TRUE); | |
146 | } | |
147 | ||
148 | static u_int | |
149 | xdrmem_getpos(xdrs) | |
150 | register XDR *xdrs; | |
151 | { | |
152 | ||
153 | return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); | |
154 | } | |
155 | ||
156 | static bool_t | |
157 | xdrmem_setpos(xdrs, pos) | |
158 | register XDR *xdrs; | |
159 | u_int pos; | |
160 | { | |
161 | register caddr_t newaddr = xdrs->x_base + pos; | |
162 | register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; | |
163 | ||
164 | if ((long)newaddr > (long)lastaddr) | |
165 | return (FALSE); | |
166 | xdrs->x_private = newaddr; | |
167 | xdrs->x_handy = (int)lastaddr - (int)newaddr; | |
168 | return (TRUE); | |
169 | } | |
170 | ||
171 | static long * | |
172 | xdrmem_inline(xdrs, len) | |
173 | register XDR *xdrs; | |
174 | int len; | |
175 | { | |
176 | long *buf = 0; | |
177 | ||
178 | if (xdrs->x_handy >= len) { | |
179 | xdrs->x_handy -= len; | |
180 | buf = (long *) xdrs->x_private; | |
181 | xdrs->x_private += len; | |
182 | } | |
183 | return (buf); | |
184 | } |