/*
* [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.baksmali.Adaptors.Format;
import org.jf.baksmali.Adaptors.LabelMethodItem;
import org.jf.baksmali.Adaptors.MethodDefinition;
import org.jf.dexlib2.iface.instruction.SwitchElement;
import org.jf.dexlib2.iface.instruction.formats.SparseSwitchPayload;
import org.jf.util.IndentingWriter;
import org.jf.baksmali.Renderers.IntegerRenderer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class SparseSwitchMethodItem extends InstructionMethodItem<SparseSwitchPayload> {
private final List<SparseSwitchTarget> targets;
public SparseSwitchMethodItem(MethodDefinition methodDef, int codeAddress, SparseSwitchPayload instruction) {
super(methodDef, codeAddress, instruction);
int baseCodeAddress = methodDef.getSparseSwitchBaseAddress(codeAddress);
targets = new ArrayList<SparseSwitchTarget>();
if (baseCodeAddress >= 0) {
for (SwitchElement switchElement: instruction.getSwitchElements()) {
LabelMethodItem label = methodDef.getLabelCache().internLabel(
new LabelMethodItem( methodDef.classDef.options, baseCodeAddress + switchElement.getOffset(),
"sswitch_"));
targets.add(new SparseSwitchLabelTarget(switchElement.getKey(), label));
}
} else {
//if we couldn't determine a base address, just use relative offsets rather than labels
for (SwitchElement switchElement: instruction.getSwitchElements()) {
targets.add(new SparseSwitchOffsetTarget(switchElement.getKey(), switchElement.getOffset()));
}
}
}
@Override
public boolean writeTo(IndentingWriter writer) throws IOException {
writer.write(".sparse-switch\n");
writer.indent(4);
for (SparseSwitchTarget target: targets) {
IntegerRenderer.writeTo(writer, target.getKey());
writer.write(" -> ");
target.writeTargetTo(writer);
writeCommentIfResourceId(writer, target.getKey());
writer.write('\n');
}
writer.deindent(4);
writer.write(".end sparse-switch");
return true;
}
private static abstract class SparseSwitchTarget {
private final int key;
public SparseSwitchTarget(int key) {
this.key = key;
}
public int getKey() { return key; }
public abstract void writeTargetTo(IndentingWriter writer) throws IOException;
}
private static class SparseSwitchLabelTarget extends SparseSwitchTarget {
private final LabelMethodItem target;
public SparseSwitchLabelTarget(int key, LabelMethodItem target) {
super(key);
this.target = target;
}
public void writeTargetTo(IndentingWriter writer) throws IOException {
target.writeTo(writer);
}
}
private static class SparseSwitchOffsetTarget extends SparseSwitchTarget {
private final int target;
public SparseSwitchOffsetTarget(int key, int target) {
super(key);
this.target = target;
}
public void writeTargetTo(IndentingWriter writer) throws IOException {
if (target >= 0) {
writer.write('+');
}
writer.printSignedIntAsDec(target);
}
}
}