--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/share/classes/com/sun/org/apache/bcel/internal/generic/PUSH.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,198 @@
+/*
+ * 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/>.
+ */
+import com.sun.org.apache.bcel.internal.Constants;
+import java.io.*;
+
+/**
+ * Wrapper class for push operations, which are implemented either as BIPUSH,
+ * LDC or xCONST_n instructions.
+ *
+ * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ */
+public final class PUSH
+ implements CompoundInstruction, VariableLengthInstruction, InstructionConstants
+{
+ private Instruction instruction;
+
+ /**
+ * This constructor also applies for values of type short, char, byte
+ *
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, int value) {
+ if((value >= -1) && (value <= 5)) // Use ICONST_n
+ instruction = INSTRUCTIONS[Constants.ICONST_0 + value];
+ else if((value >= -128) && (value <= 127)) // Use BIPUSH
+ instruction = new BIPUSH((byte)value);
+ else if((value >= -32768) && (value <= 32767)) // Use SIPUSH
+ instruction = new SIPUSH((short)value);
+ else // If everything fails create a Constant pool entry
+ instruction = new LDC(cp.addInteger(value));
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, boolean value) {
+ instruction = INSTRUCTIONS[Constants.ICONST_0 + (value? 1 : 0)];
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, float value) {
+ if(value == 0.0)
+ instruction = FCONST_0;
+ else if(value == 1.0)
+ instruction = FCONST_1;
+ else if(value == 2.0)
+ instruction = FCONST_2;
+ else // Create a Constant pool entry
+ instruction = new LDC(cp.addFloat(value));
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, long value) {
+ if(value == 0)
+ instruction = LCONST_0;
+ else if(value == 1)
+ instruction = LCONST_1;
+ else // Create a Constant pool entry
+ instruction = new LDC2_W(cp.addLong(value));
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, double value) {
+ if(value == 0.0)
+ instruction = DCONST_0;
+ else if(value == 1.0)
+ instruction = DCONST_1;
+ else // Create a Constant pool entry
+ instruction = new LDC2_W(cp.addDouble(value));
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, String value) {
+ if(value == null)
+ instruction = ACONST_NULL;
+ else // Create a Constant pool entry
+ instruction = new LDC(cp.addString(value));
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, Number value) {
+ if((value instanceof Integer) || (value instanceof Short) || (value instanceof Byte))
+ instruction = new PUSH(cp, value.intValue()).instruction;
+ else if(value instanceof Double)
+ instruction = new PUSH(cp, value.doubleValue()).instruction;
+ else if(value instanceof Float)
+ instruction = new PUSH(cp, value.floatValue()).instruction;
+ else if(value instanceof Long)
+ instruction = new PUSH(cp, value.longValue()).instruction;
+ else
+ throw new ClassGenException("What's this: " + value);
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, Character value) {
+ this(cp, (int)value.charValue());
+ }
+
+ /**
+ * @param cp Constant pool
+ * @param value to be pushed
+ */
+ public PUSH(ConstantPoolGen cp, Boolean value) {
+ this(cp, value.booleanValue());
+ }
+
+ public final InstructionList getInstructionList() {
+ return new InstructionList(instruction);
+ }
+
+ public final Instruction getInstruction() {
+ return instruction;
+ }
+
+ /**
+ * @return mnemonic for instruction
+ */
+ public String toString() {
+ return instruction.toString() + " (PUSH)";
+ }
+}