initial import
[glibc.git] / sunrpc / xdr_mem.c
blob558d36922703d819ffc35ab6f4660962167943d8
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.
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.
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.
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.
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";
32 #endif
35 * xdr_mem.h, XDR implementation using memory buffers.
37 * Copyright (C) 1984, Sun Microsystems, Inc.
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.
46 #include <rpc/types.h>
47 #include <rpc/xdr.h>
48 #include <netinet/in.h>
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();
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
71 * The procedure xdrmem_create initializes a stream descriptor for a
72 * memory buffer.
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;
82 xdrs->x_op = op;
83 xdrs->x_ops = &xdrmem_ops;
84 xdrs->x_private = xdrs->x_base = addr;
85 xdrs->x_handy = size;
88 static void
89 xdrmem_destroy(/*xdrs*/)
90 /*XDR *xdrs;*/
94 static bool_t
95 xdrmem_getlong(xdrs, lp)
96 register XDR *xdrs;
97 long *lp;
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);
107 static bool_t
108 xdrmem_putlong(xdrs, lp)
109 register XDR *xdrs;
110 long *lp;
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);
120 static bool_t
121 xdrmem_getbytes(xdrs, addr, len)
122 register XDR *xdrs;
123 caddr_t addr;
124 register u_int len;
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);
134 static bool_t
135 xdrmem_putbytes(xdrs, addr, len)
136 register XDR *xdrs;
137 caddr_t addr;
138 register u_int len;
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);
148 static u_int
149 xdrmem_getpos(xdrs)
150 register XDR *xdrs;
153 return ((u_int)xdrs->x_private - (u_int)xdrs->x_base);
156 static bool_t
157 xdrmem_setpos(xdrs, pos)
158 register XDR *xdrs;
159 u_int pos;
161 register caddr_t newaddr = xdrs->x_base + pos;
162 register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
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);
171 static long *
172 xdrmem_inline(xdrs, len)
173 register XDR *xdrs;
174 int len;
176 long *buf = 0;
178 if (xdrs->x_handy >= len) {
179 xdrs->x_handy -= len;
180 buf = (long *) xdrs->x_private;
181 xdrs->x_private += len;
183 return (buf);