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 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