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/*
* [The "BSD licence"]
* Copyright (c) 2010 Ben Gruver (JesusFreke)
* 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 name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 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 AUTHOR 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.
*/
package org.jf.dexlib.Code;
import org.jf.dexlib.Code.Format.Format;
import org.jf.dexlib.DexFile;
import org.jf.dexlib.Util.AnnotatedOutput;
public abstract class Instruction {
public final Opcode opcode;
/**
* Returns the size of this instruction in code blocks, assuming the instruction is located at the given address
* @param codeAddress the code address where the instruction is located
* @return The size of this instruction in code blocks
**/
public int getSize(int codeAddress) {
return opcode.format.size/2;
}
protected Instruction(Opcode opcode) {
this.opcode = opcode;
}
public abstract Format getFormat();
public int write(AnnotatedOutput out, int currentCodeAddress) {
if (out.annotates()) {
annotateInstruction(out, currentCodeAddress);
}
writeInstruction(out, currentCodeAddress);
return currentCodeAddress + getSize(currentCodeAddress);
}
protected void annotateInstruction(AnnotatedOutput out, int currentCodeAddress) {
out.annotate(getSize(currentCodeAddress)*2, "[0x" + Integer.toHexString(currentCodeAddress) + "] " +
opcode.name + " instruction");
}
protected abstract void writeInstruction(AnnotatedOutput out, int currentCodeAddress);
public static interface InstructionFactory {
public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex);
}
}
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