183b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com/* 283b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * [The "BSD licence"] 300fc68adf2e39aeb9fed35293f2576bbe729ec4bJesusFreke@JesusFreke.com * Copyright (c) 2010 Ben Gruver (JesusFreke) 483b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * All rights reserved. 583b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * 683b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * Redistribution and use in source and binary forms, with or without 783b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * modification, are permitted provided that the following conditions 883b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * are met: 983b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * 1. Redistributions of source code must retain the above copyright 1083b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * notice, this list of conditions and the following disclaimer. 1183b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * 2. Redistributions in binary form must reproduce the above copyright 1283b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * notice, this list of conditions and the following disclaimer in the 1383b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * documentation and/or other materials provided with the distribution. 1483b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * 3. The name of the author may not be used to endorse or promote products 1583b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * derived from this software without specific prior written permission. 1683b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * 1783b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1883b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1983b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2083b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2183b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2283b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2383b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2483b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2583b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2683b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2783b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com */ 2883b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com 29337dc0ea26fc2c791b5fca547191daae8a5aeb11Ben Gruverpackage org.jf.util; 3083b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com 3183b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.compublic abstract class AlignmentUtils { 3283b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com public static int alignOffset(int offset, int alignment) { 3383b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com int mask = alignment - 1; 34eb21bb17838c8f622638469b80b8d8edbb1077caJesusFreke@JesusFreke.com assert (alignment >= 0) && ((mask & alignment) == 0); 3583b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com return (offset + mask) & ~mask; 3683b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com } 3716a911620ccf7b530b873fb71cf13e8dcb88ad28JesusFreke@JesusFreke.com 3816a911620ccf7b530b873fb71cf13e8dcb88ad28JesusFreke@JesusFreke.com public static boolean isAligned(int offset, int alignment) { 3916a911620ccf7b530b873fb71cf13e8dcb88ad28JesusFreke@JesusFreke.com return (offset % alignment) == 0; 4016a911620ccf7b530b873fb71cf13e8dcb88ad28JesusFreke@JesusFreke.com } 4183b80f81d311b233188c281059aad4a9f5e8b4e6JesusFreke@JesusFreke.com} 42