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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 | */ | |
78ed81a3 | 29 | |
30 | #if defined(LIBC_SCCS) && !defined(lint) | |
31 | /*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/ | |
32 | /*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/ | |
33 | static char *rcsid = "$Id: xdr_mem.c,v 1.3 1993/08/26 00:53:50 jtc Exp $"; | |
15637ed4 RG |
34 | #endif |
35 | ||
36 | /* | |
37 | * xdr_mem.h, XDR implementation using memory buffers. | |
38 | * | |
39 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
40 | * | |
41 | * If you have some data to be interpreted as external data representation | |
42 | * or to be converted to external data representation in a memory buffer, | |
43 | * then this is the package for you. | |
44 | * | |
45 | */ | |
46 | ||
47 | ||
48 | #include <rpc/types.h> | |
49 | #include <rpc/xdr.h> | |
50 | #include <netinet/in.h> | |
51 | ||
52 | static bool_t xdrmem_getlong(); | |
53 | static bool_t xdrmem_putlong(); | |
54 | static bool_t xdrmem_getbytes(); | |
55 | static bool_t xdrmem_putbytes(); | |
56 | static u_int xdrmem_getpos(); | |
57 | static bool_t xdrmem_setpos(); | |
58 | static long * xdrmem_inline(); | |
59 | static void xdrmem_destroy(); | |
60 | ||
61 | static struct xdr_ops xdrmem_ops = { | |
62 | xdrmem_getlong, | |
63 | xdrmem_putlong, | |
64 | xdrmem_getbytes, | |
65 | xdrmem_putbytes, | |
66 | xdrmem_getpos, | |
67 | xdrmem_setpos, | |
68 | xdrmem_inline, | |
69 | xdrmem_destroy | |
70 | }; | |
71 | ||
72 | /* | |
73 | * The procedure xdrmem_create initializes a stream descriptor for a | |
74 | * memory buffer. | |
75 | */ | |
76 | void | |
77 | xdrmem_create(xdrs, addr, size, op) | |
78 | register XDR *xdrs; | |
79 | caddr_t addr; | |
80 | u_int size; | |
81 | enum xdr_op op; | |
82 | { | |
83 | ||
84 | xdrs->x_op = op; | |
85 | xdrs->x_ops = &xdrmem_ops; | |
86 | xdrs->x_private = xdrs->x_base = addr; | |
87 | xdrs->x_handy = size; | |
88 | } | |
89 | ||
90 | static void | |
91 | xdrmem_destroy(/*xdrs*/) | |
92 | /*XDR *xdrs;*/ | |
93 | { | |
94 | } | |
95 | ||
96 | static bool_t | |
97 | xdrmem_getlong(xdrs, lp) | |
98 | register XDR *xdrs; | |
99 | long *lp; | |
100 | { | |
101 | ||
102 | if ((xdrs->x_handy -= sizeof(long)) < 0) | |
103 | return (FALSE); | |
104 | *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); | |
105 | xdrs->x_private += sizeof(long); | |
106 | return (TRUE); | |
107 | } | |
108 | ||
109 | static bool_t | |
110 | xdrmem_putlong(xdrs, lp) | |
111 | register XDR *xdrs; | |
112 | long *lp; | |
113 | { | |
114 | ||
115 | if ((xdrs->x_handy -= sizeof(long)) < 0) | |
116 | return (FALSE); | |
117 | *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); | |
118 | xdrs->x_private += sizeof(long); | |
119 | return (TRUE); | |
120 | } | |
121 | ||
122 | static bool_t | |
123 | xdrmem_getbytes(xdrs, addr, len) | |
124 | register XDR *xdrs; | |
125 | caddr_t addr; | |
126 | register u_int len; | |
127 | { | |
128 | ||
129 | if ((xdrs->x_handy -= len) < 0) | |
130 | return (FALSE); | |
131 | bcopy(xdrs->x_private, addr, len); | |
132 | xdrs->x_private += len; | |
133 | return (TRUE); | |
134 | } | |
135 | ||
136 | static bool_t | |
137 | xdrmem_putbytes(xdrs, addr, len) | |
138 | register XDR *xdrs; | |
139 | caddr_t addr; | |
140 | register u_int len; | |
141 | { | |
142 | ||
143 | if ((xdrs->x_handy -= len) < 0) | |
144 | return (FALSE); | |
145 | bcopy(addr, xdrs->x_private, len); | |
146 | xdrs->x_private += len; | |
147 | return (TRUE); | |
148 | } | |
149 | ||
150 | static u_int | |
151 | xdrmem_getpos(xdrs) | |
152 | register XDR *xdrs; | |
153 | { | |
154 | ||
155 | return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); | |
156 | } | |
157 | ||
158 | static bool_t | |
159 | xdrmem_setpos(xdrs, pos) | |
160 | register XDR *xdrs; | |
161 | u_int pos; | |
162 | { | |
163 | register caddr_t newaddr = xdrs->x_base + pos; | |
164 | register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; | |
165 | ||
166 | if ((long)newaddr > (long)lastaddr) | |
167 | return (FALSE); | |
168 | xdrs->x_private = newaddr; | |
169 | xdrs->x_handy = (int)lastaddr - (int)newaddr; | |
170 | return (TRUE); | |
171 | } | |
172 | ||
173 | static long * | |
174 | xdrmem_inline(xdrs, len) | |
175 | register XDR *xdrs; | |
176 | int len; | |
177 | { | |
178 | long *buf = 0; | |
179 | ||
180 | if (xdrs->x_handy >= len) { | |
181 | xdrs->x_handy -= len; | |
182 | buf = (long *) xdrs->x_private; | |
183 | xdrs->x_private += len; | |
184 | } | |
185 | return (buf); | |
186 | } |