1/* 2 * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.tools.asm; 27 28import sun.tools.java.*; 29import java.io.IOException; 30import java.io.DataOutputStream; 31 32/** 33 * A numeric constant pool item. Can either be integer, float, long or double. 34 * 35 * WARNING: The contents of this source file are not part of any 36 * supported API. Code that depends on them does so at its own risk: 37 * they are subject to change or removal without notice. 38 */ 39final 40class NumberConstantData extends ConstantPoolData { 41 Number num; 42 43 /** 44 * Constructor 45 */ 46 NumberConstantData(ConstantPool tab, Number num) { 47 this.num = num; 48 } 49 50 /** 51 * Write the constant to the output stream 52 */ 53 void write(Environment env, DataOutputStream out, ConstantPool tab) throws IOException { 54 if (num instanceof Integer) { 55 out.writeByte(CONSTANT_INTEGER); 56 out.writeInt(num.intValue()); 57 } else if (num instanceof Long) { 58 out.writeByte(CONSTANT_LONG); 59 out.writeLong(num.longValue()); 60 } else if (num instanceof Float) { 61 out.writeByte(CONSTANT_FLOAT); 62 out.writeFloat(num.floatValue()); 63 } else if (num instanceof Double) { 64 out.writeByte(CONSTANT_DOUBLE); 65 out.writeDouble(num.doubleValue()); 66 } 67 } 68 /** 69 * Return the order of the constant 70 */ 71 int order() { 72 return (width() == 1) ? 0 : 3; 73 } 74 75 /** 76 * Return the number of entries that it takes up in the constant pool 77 */ 78 int width() { 79 return ((num instanceof Double) || (num instanceof Long)) ? 2 : 1; 80 } 81} 82