001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.asm.model.lang;
043:
044: import java.util.Map;
045: import java.util.WeakHashMap;
046:
047: public class BitWidth {
048: private final int width;
049:
050: public final static BitWidth BIT;
051: public final static BitWidth BYTE;
052: public final static BitWidth WORD;
053: public final static BitWidth DWORD;
054: public final static BitWidth QWORD;
055:
056: private final static Map<BitWidth, Boolean> widths;
057:
058: static {
059: widths = new WeakHashMap<BitWidth, Boolean>();
060:
061: BIT = getBitWidth(1);
062: BYTE = getBitWidth(8);
063: WORD = getBitWidth(16);
064: DWORD = getBitWidth(32);
065: QWORD = getBitWidth(64);
066: }
067:
068: private BitWidth(int width) {
069: this .width = width;
070: }
071:
072: public int getWidth() {
073: return width;
074: }
075:
076: public static BitWidth getBitWidth(int width) {
077: for (BitWidth el : widths.keySet()) {
078: if (el.getWidth() == width) {
079: return el;
080: }
081: }
082:
083: BitWidth res = new BitWidth(width);
084: widths.put(res, true);
085: return res;
086: }
087:
088: @Override
089: public boolean equals(Object o) {
090: if (!(o instanceof BitWidth)) {
091: return false;
092: }
093:
094: return width == ((BitWidth) o).getWidth();
095: }
096:
097: @Override
098: public int hashCode() {
099: return width;
100: }
101: }
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