diff options
Diffstat (limited to 'src/share/classes/com/sun/org/apache/bcel/internal/generic/LDC2_W.java')
-rw-r--r-- | src/share/classes/com/sun/org/apache/bcel/internal/generic/LDC2_W.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/bcel/internal/generic/LDC2_W.java b/src/share/classes/com/sun/org/apache/bcel/internal/generic/LDC2_W.java new file mode 100644 index 0000000..4a97a20 --- /dev/null +++ b/src/share/classes/com/sun/org/apache/bcel/internal/generic/LDC2_W.java @@ -0,0 +1,119 @@ +/* + * reserved comment block + * DO NOT REMOVE OR ALTER! + */ +package com.sun.org.apache.bcel.internal.generic; + +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" and + * "Apache BCEL" must not be used to endorse or promote products + * derived from this software without prior written permission. For + * written permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * "Apache BCEL", nor may "Apache" appear in their name, without + * prior written permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + */ + +/** + * LDC2_W - Push long or double from constant pool + * + * <PRE>Stack: ... -> ..., item.word1, item.word2</PRE> + * + * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> + */ +public class LDC2_W extends CPInstruction + implements PushInstruction, TypedInstruction { + /** + * Empty constructor needed for the Class.newInstance() statement in + * Instruction.readInstruction(). Not to be used otherwise. + */ + LDC2_W() {} + + public LDC2_W(int index) { + super(com.sun.org.apache.bcel.internal.Constants.LDC2_W, index); + } + + public Type getType(ConstantPoolGen cpg) { + switch(cpg.getConstantPool().getConstant(index).getTag()) { + case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Long: return Type.LONG; + case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Double: return Type.DOUBLE; + default: // Never reached + throw new RuntimeException("Unknown constant type " + opcode); + } + } + + public Number getValue(ConstantPoolGen cpg) { + com.sun.org.apache.bcel.internal.classfile.Constant c = cpg.getConstantPool().getConstant(index); + + switch(c.getTag()) { + case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Long: + return new Long(((com.sun.org.apache.bcel.internal.classfile.ConstantLong)c).getBytes()); + + case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Double: + return new Double(((com.sun.org.apache.bcel.internal.classfile.ConstantDouble)c).getBytes()); + + default: // Never reached + throw new RuntimeException("Unknown or invalid constant type at " + index); + } + } + + /** + * Call corresponding visitor method(s). The order is: + * Call visitor methods of implemented interfaces first, then + * call methods according to the class hierarchy in descending order, + * i.e., the most specific visitXXX() call comes last. + * + * @param v Visitor object + */ + public void accept(Visitor v) { + v.visitStackProducer(this); + v.visitPushInstruction(this); + v.visitTypedInstruction(this); + v.visitCPInstruction(this); + v.visitLDC2_W(this); + } +} |