1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 #include <sys/types.h>
31 #include <sys/param.h>
32 #include <sys/acct.h>
33
34 #ifdef uts
35 float
36 #else
37 /*
38 * For as long as ct is of type comp_t, and comp_t is defined to be of type
39 * unsigned short, the maximum value of ct will be 2^16-1 ie 65535. Based on
40 * this input value, the maximum value that expand() can return will therefore
41 * be 4292870144. A return type of ulong_t ensures we don't overflow.
42 */
43 ulong_t
44 #endif
expand(comp_t ct)45 expand(comp_t ct)
46 {
47 int e;
48 #ifdef uts
49 float f;
50 #else
51 ulong_t f;
52 #endif
53 e = (ct >> 13) & 07;
54 f = ct & 017777;
55
56 while (e-- > 0)
57 #ifdef uts
58 f *= 8.0; /* can't shift a float */
59 #else
60 f <<=3;
61 #endif
62
63 return f;
64 }
65