Mercurial > hg > truffle
view graal/com.oracle.max.base/src/com/sun/max/util/Range.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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/* * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.max.util; /** * A {@code Range} denotes all the integer values between a {@linkplain #start() start} (inclusive) and * {@linkplain #end() end} (exclusive) value. */ public class Range { private final int start; private final int end; public Range(int start) { this(start, start + 1); } /** * Creates an object representing values in the range {@code [start .. end)}. * * @param start * the lowest value in the range * @param end * the value one greater than the highest value in the range */ public Range(int start, int end) { assert end >= start; this.start = start; this.end = end; assert length() >= 0; } /** * Gets the lowest value in this range. * @return */ public int start() { return start; } /** * Gets the number of values covered by this range. */ public long length() { // This cast and the long return type prevents integer overflow return ((long) end) - start; } /** * Gets the value one greater than the highest value in this range. */ public int end() { return end; } public boolean contains(long value) { return value >= start && value < end; } @Override public String toString() { return "[" + start() + '-' + (end() - 1) + ']'; } }