/* |
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* Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.tools.asm; |
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import sun.tools.java.*; |
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import java.io.IOException; |
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import java.io.DataOutputStream; |
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/** |
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* A numeric constant pool item. Can either be integer, float, long or double. |
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* |
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* WARNING: The contents of this source file are not part of any |
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* supported API. Code that depends on them does so at its own risk: |
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* they are subject to change or removal without notice. |
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*/ |
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final |
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class NumberConstantData extends ConstantPoolData { |
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Number num; |
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/** |
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* Constructor |
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*/ |
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NumberConstantData(ConstantPool tab, Number num) { |
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this.num = num; |
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} |
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/** |
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* Write the constant to the output stream |
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*/ |
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void write(Environment env, DataOutputStream out, ConstantPool tab) throws IOException { |
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if (num instanceof Integer) { |
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out.writeByte(CONSTANT_INTEGER); |
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out.writeInt(num.intValue()); |
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} else if (num instanceof Long) { |
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out.writeByte(CONSTANT_LONG); |
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out.writeLong(num.longValue()); |
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} else if (num instanceof Float) { |
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out.writeByte(CONSTANT_FLOAT); |
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out.writeFloat(num.floatValue()); |
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} else if (num instanceof Double) { |
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out.writeByte(CONSTANT_DOUBLE); |
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out.writeDouble(num.doubleValue()); |
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} |
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} |
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/** |
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* Return the order of the constant |
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*/ |
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int order() { |
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return (width() == 1) ? 0 : 3; |
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} |
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/** |
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* Return the number of entries that it takes up in the constant pool |
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*/ |
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int width() { |
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return ((num instanceof Double) || (num instanceof Long)) ? 2 : 1; |
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} |
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} |