Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/utilities/AddressOps.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/AddressOps.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,120 @@ +/* + * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +package sun.jvm.hotspot.utilities; + +import sun.jvm.hotspot.debugger.*; + +/** Helper class with operations on addresses. Solves the problem of + one or both of the arguments being null and needing to call + methods like greaterThan(), lessThan(), etc. on them. */ + +public class AddressOps { + /** Returns true if a1 is less than a2. Either or both may be null. */ + public static boolean lessThan(Address a1, Address a2) { + if (a2 == null) { + return false; + } else if (a1 == null) { + return true; + } else { + return a1.lessThan(a2); + } + } + + /** Returns true if a1 is less than or equal to a2. Either or both may be null. */ + public static boolean lessThanOrEqual(Address a1, Address a2) { + if (a2 == null) { + return (a1 == null); + } else if (a1 == null) { + return true; + } else { + return a1.lessThanOrEqual(a2); + } + } + + /** Returns true if a1 is greater than a2. Either or both may be null. */ + public static boolean greaterThan(Address a1, Address a2) { + if (a1 == null) { + return false; + } else if (a2 == null) { + return true; + } else { + return a1.greaterThan(a2); + } + } + + /** Returns true if a1 is greater than or equal to a2. Either or both may be null. */ + public static boolean greaterThanOrEqual(Address a1, Address a2) { + if (a1 == null) { + return (a2 == null); + } else if (a2 == null) { + return true; + } else { + return a1.greaterThanOrEqual(a2); + } + } + + /** Returns true if a1 is equal to a2. Either or both may be null. */ + public static boolean equal(Address a1, Address a2) { + if ((a1 == null) && (a2 == null)) { + return true; + } + + if ((a1 == null) || (a2 == null)) { + return false; + } + + return (a1.equals(a2)); + } + + /** Shorthand for {@link #lessThan} */ + public static boolean lt(Address a1, Address a2) { + return lessThan(a1, a2); + } + + /** Shorthand for {@link #lessThanOrEqual} */ + public static boolean lte(Address a1, Address a2) { + return lessThanOrEqual(a1, a2); + } + + /** Shorthand for {@link #greaterThan} */ + public static boolean gt(Address a1, Address a2) { + return greaterThan(a1, a2); + } + + /** Shorthand for {@link #greaterThanOrEqual} */ + public static boolean gte(Address a1, Address a2) { + return greaterThanOrEqual(a1, a2); + } + + /** Returns maximum of the two addresses */ + public static Address max(Address a1, Address a2) { + return (gt(a1, a2) ? a1 : a2); + } + + /** Returns minimum of the two addresses */ + public static Address min(Address a1, Address a2) { + return (lt(a1, a2) ? a1 : a2); + } +}