diff options
Diffstat (limited to 'dexlib2/src/main/java/org/jf/dexlib2/util/AlignmentUtils.java')
-rw-r--r-- | dexlib2/src/main/java/org/jf/dexlib2/util/AlignmentUtils.java | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/dexlib2/src/main/java/org/jf/dexlib2/util/AlignmentUtils.java b/dexlib2/src/main/java/org/jf/dexlib2/util/AlignmentUtils.java new file mode 100644 index 00000000..1648372a --- /dev/null +++ b/dexlib2/src/main/java/org/jf/dexlib2/util/AlignmentUtils.java @@ -0,0 +1,44 @@ +/* + * Copyright 2018, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +package org.jf.dexlib2.util; + +public abstract class AlignmentUtils { + public static int alignOffset(int offset, int alignment) { + int mask = alignment - 1; + assert (alignment >= 0) && ((mask & alignment) == 0); + return (offset + mask) & ~mask; + } + + public static boolean isAligned(int offset, int alignment) { + return (offset % alignment) == 0; + } +} |