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.
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.
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.
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.
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.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
29 #include <afsconfig.h>
30 #include <afs/param.h>
36 * xdr_mem.h, XDR implementation using memory buffers.
38 * Copyright (C) 1984, Sun Microsystems, Inc.
40 * If you have some data to be interpreted as external data representation
41 * or to be converted to external data representation in a memory buffer,
42 * then this is the package for you.
48 #include <netinet/in.h>
53 static bool_t xdrmem_getint32();
54 static bool_t xdrmem_putint32();
55 static bool_t xdrmem_getbytes();
56 static bool_t xdrmem_putbytes();
57 static u_int xdrmem_getpos();
58 static bool_t xdrmem_setpos();
59 static afs_int32 *xdrmem_inline();
60 static void xdrmem_destroy();
62 static struct xdr_ops xdrmem_ops = {
63 .x_getint32 = xdrmem_getint32,
64 .x_putint32 = xdrmem_putint32,
65 .x_getbytes = xdrmem_getbytes,
66 .x_putbytes = xdrmem_putbytes,
67 .x_getpos = xdrmem_getpos,
68 .x_setpos = xdrmem_setpos,
69 .x_inline = xdrmem_inline,
70 .x_destroy = xdrmem_destroy
74 * The procedure xdrmem_create initializes a stream descriptor for a
78 xdrmem_create(XDR * xdrs, caddr_t addr, u_int size, enum xdr_op op)
81 xdrs->x_ops = &xdrmem_ops;
82 xdrs->x_private = xdrs->x_base = addr;
83 xdrs->x_handy = (size > INT_MAX) ? INT_MAX : size; /* XXX */
92 xdrmem_getint32(XDR * xdrs, afs_int32 * lp)
94 if (xdrs->x_handy < sizeof(afs_int32))
97 xdrs->x_handy -= sizeof(afs_int32);
98 *lp = ntohl(*((afs_int32 *) (xdrs->x_private)));
99 xdrs->x_private += sizeof(afs_int32);
104 xdrmem_putint32(XDR * xdrs, afs_int32 * lp)
106 if (xdrs->x_handy < sizeof(afs_int32))
109 xdrs->x_handy -= sizeof(afs_int32);
110 *(afs_int32 *) xdrs->x_private = htonl(*lp);
111 xdrs->x_private += sizeof(afs_int32);
116 xdrmem_getbytes(XDR * xdrs, caddr_t addr, u_int len)
118 if (xdrs->x_handy < len)
121 xdrs->x_handy -= len;
122 memcpy(addr, xdrs->x_private, len);
123 xdrs->x_private += len;
128 xdrmem_putbytes(XDR * xdrs, caddr_t addr, u_int len)
130 if (xdrs->x_handy < len)
133 xdrs->x_handy -= len;
134 memcpy(xdrs->x_private, addr, len);
135 xdrs->x_private += len;
140 xdrmem_getpos(XDR * xdrs)
142 return ((u_int)(xdrs->x_private - xdrs->x_base));
146 xdrmem_setpos(XDR * xdrs, u_int pos)
148 caddr_t newaddr = xdrs->x_base + pos;
149 caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
151 if (newaddr > lastaddr)
153 xdrs->x_private = newaddr;
154 xdrs->x_handy = (int)(lastaddr - newaddr);
159 xdrmem_inline(XDR * xdrs, int len)
163 if (len >= 0 && xdrs->x_handy >= len) {
164 xdrs->x_handy -= len;
165 buf = (afs_int32 *) xdrs->x_private;
166 xdrs->x_private += len;