/*
* Copyright 1994-2003 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* 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.tools.asm;
import sun.tools.java.*;
import java.io.IOException;
import java.io.DataOutputStream;
/**
* A numeric constant pool item. Can either be integer, float, long or double.
*
* WARNING: The contents of this source file are not part of any
* supported API. Code that depends on them does so at its own risk:
* they are subject to change or removal without notice.
*/
final
class NumberConstantData extends ConstantPoolData {
Number num;
/**
* Constructor
*/
NumberConstantData(ConstantPool tab, Number num) {
this.num = num;
}
/**
* Write the constant to the output stream
*/
void write(Environment env, DataOutputStream out, ConstantPool tab) throws IOException {
if (num instanceof Integer) {
out.writeByte(CONSTANT_INTEGER);
out.writeInt(num.intValue());
} else if (num instanceof Long) {
out.writeByte(CONSTANT_LONG);
out.writeLong(num.longValue());
} else if (num instanceof Float) {
out.writeByte(CONSTANT_FLOAT);
out.writeFloat(num.floatValue());
} else if (num instanceof Double) {
out.writeByte(CONSTANT_DOUBLE);
out.writeDouble(num.doubleValue());
}
}
/**
* Return the order of the constant
*/
int order() {
return (width() == 1) ? 0 : 3;
}
/**
* Return the number of entries that it takes up in the constant pool
*/
int width() {
return ((num instanceof Double) || (num instanceof Long)) ? 2 : 1;
}
}
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