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Apache BCEL 6.5.0 Source Code Files
Apache BCEL Source Code Files are inside the Apache BCEL source package file like bcel-6.5.0-src.zip. Unzip the source package file and go to the "src/main" sub-directory, you will see source code files.
Here is the list of Java source code files of the Apache BCEL 6.5.0 in \Users\fyicenter\bcel-6.5.0\src:
✍: FYIcenter.com
⏎ org/apache/bcel/generic/BranchInstruction.java
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ package org.apache.bcel.generic; import java.io.DataOutputStream; import java.io.IOException; import org.apache.bcel.util.ByteSequence; /** * Abstract super class for branching instructions like GOTO, IFEQ, etc.. * Branch instructions may have a variable length, namely GOTO, JSR, * LOOKUPSWITCH and TABLESWITCH. * * @see InstructionList */ public abstract class BranchInstruction extends Instruction implements InstructionTargeter { /** * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter */ @Deprecated protected int index; // Branch target relative to this instruction /** * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter */ @Deprecated protected InstructionHandle target; // Target object in instruction list /** * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter */ @Deprecated protected int position; // Byte code offset /** * Empty constructor needed for Instruction.readInstruction. * Not to be used otherwise. */ BranchInstruction() { } /** Common super constructor * @param opcode Instruction opcode * @param target instruction to branch to */ protected BranchInstruction(final short opcode, final InstructionHandle target) { super(opcode, (short) 3); setTarget(target); } /** * Dump instruction as byte code to stream out. * @param out Output stream */ @Override public void dump( final DataOutputStream out ) throws IOException { out.writeByte(super.getOpcode()); index = getTargetOffset(); if (!isValidShort(index)) { throw new ClassGenException("Branch target offset too large for short: " + index); } out.writeShort(index); // May be negative, i.e., point backwards } /** * @param _target branch target * @return the offset to `target' relative to this instruction */ protected int getTargetOffset( final InstructionHandle _target ) { if (_target == null) { throw new ClassGenException("Target of " + super.toString(true) + " is invalid null handle"); } final int t = _target.getPosition(); if (t < 0) { throw new ClassGenException("Invalid branch target position offset for " + super.toString(true) + ":" + t + ":" + _target); } return t - position; } /** * @return the offset to this instruction's target */ protected int getTargetOffset() { return getTargetOffset(target); } /** * Called by InstructionList.setPositions when setting the position for every * instruction. In the presence of variable length instructions `setPositions' * performs multiple passes over the instruction list to calculate the * correct (byte) positions and offsets by calling this function. * * @param offset additional offset caused by preceding (variable length) instructions * @param max_offset the maximum offset that may be caused by these instructions * @return additional offset caused by possible change of this instruction's length */ protected int updatePosition( final int offset, final int max_offset ) { position += offset; return 0; } /** * Long output format: * * <position in byte code> * <name of opcode> "["<opcode number>"]" * "("<length of instruction>")" * "<"<target instruction>">" "@"<branch target offset> * * @param verbose long/short format switch * @return mnemonic for instruction */ @Override public String toString( final boolean verbose ) { final String s = super.toString(verbose); String t = "null"; if (verbose) { if (target != null) { if (target.getInstruction() == this) { t = "<points to itself>"; } else if (target.getInstruction() == null) { t = "<null instruction!!!?>"; } else { // I'm more interested in the address of the target then // the instruction located there. //t = target.getInstruction().toString(false); // Avoid circles t = "" + target.getPosition(); } } } else { if (target != null) { index = target.getPosition(); // index = getTargetOffset(); crashes if positions haven't been set // t = "" + (index + position); t = "" + index; } } return s + " -> " + t; } /** * Read needed data (e.g. index) from file. Conversion to a InstructionHandle * is done in InstructionList(byte[]). * * @param bytes input stream * @param wide wide prefix? * @see InstructionList */ @Override protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { super.setLength(3); index = bytes.readShort(); } /** * @return target offset in byte code */ public final int getIndex() { return index; } /** * @return target of branch instruction */ public InstructionHandle getTarget() { return target; } /** * Set branch target * @param target branch target */ public void setTarget( final InstructionHandle target ) { notifyTarget(this.target, target, this); this.target = target; } /** * Used by BranchInstruction, LocalVariableGen, CodeExceptionGen, LineNumberGen */ static void notifyTarget( final InstructionHandle old_ih, final InstructionHandle new_ih, final InstructionTargeter t ) { if (old_ih != null) { old_ih.removeTargeter(t); } if (new_ih != null) { new_ih.addTargeter(t); } } /** * @param old_ih old target * @param new_ih new target */ @Override public void updateTarget( final InstructionHandle old_ih, final InstructionHandle new_ih ) { if (target == old_ih) { setTarget(new_ih); } else { throw new ClassGenException("Not targeting " + old_ih + ", but " + target); } } /** * @return true, if ih is target of this instruction */ @Override public boolean containsTarget( final InstructionHandle ih ) { return target == ih; } /** * Inform target that it's not targeted anymore. */ @Override void dispose() { setTarget(null); index = -1; position = -1; } /** * @return the position * @since 6.0 */ protected int getPosition() { return position; } /** * @param position the position to set * @since 6.0 */ protected void setPosition(final int position) { this.position = position; } /** * @param index the index to set * @since 6.0 */ protected void setIndex(final int index) { this.index = index; } }
⏎ org/apache/bcel/generic/BranchInstruction.java
Or download all of them as a single archive file:
File name: bcel-6.5.0-fyi.zip File size: 706792 bytes Release date: 2020-07-03 Download
⇐ Install Apache BCEL 6.5.0 Binary Package
2023-04-03, 28851👍, 5💬
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