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AttributesUnitPrinter.java
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125 lines (107 loc) · 3.08 KB
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package soot;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2003 Ondrej Lhotak
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
import java.util.Stack;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import soot.tagkit.ColorTag;
import soot.tagkit.Host;
import soot.tagkit.JimpleLineNumberTag;
import soot.tagkit.PositionTag;
import soot.tagkit.Tag;
/**
* Adds PositionTags to ValueBoxes to identify their position in the output.
*/
public class AttributesUnitPrinter {
private static final Logger logger = LoggerFactory.getLogger(AttributesUnitPrinter.class);
private Stack<Integer> startOffsets;
private int endOffset;
private int startStmtOffset;
private int startLn;
private int currentLn;
private int lastNewline;
private UnitPrinter printer;
public AttributesUnitPrinter(int currentLnNum) {
this.currentLn = currentLnNum;
}
public void startUnit(Unit u) {
startLn = currentLn;
startStmtOffset = outputLength() - lastNewline;
}
public void endUnit(Unit u) {
int endStmtOffset = outputLength() - lastNewline;
// logger.debug("u: "+u.toString());
if (hasTag(u)) {
// logger.debug("u: "+u.toString()+" has tag");
u.addTag(new JimpleLineNumberTag(startLn, currentLn));
}
if (hasColorTag(u)) {
u.addTag(new PositionTag(startStmtOffset, endStmtOffset));
}
}
public void startValueBox(ValueBox u) {
if (startOffsets == null) {
startOffsets = new Stack<Integer>();
}
startOffsets.push(outputLength() - lastNewline);
}
public void endValueBox(ValueBox u) {
endOffset = outputLength() - lastNewline;
if (hasColorTag(u)) {
u.addTag(new PositionTag(startOffsets.pop(), endOffset));
}
}
private boolean hasTag(Host h) {
if (h instanceof Unit) {
for (ValueBox box : ((Unit) h).getUseAndDefBoxes()) {
if (hasTag(box)) {
return true;
}
}
}
return !h.getTags().isEmpty();
}
private boolean hasColorTag(Host h) {
for (Tag t : h.getTags()) {
if (t instanceof ColorTag) {
return true;
}
}
return false;
}
public void setEndLn(int ln) {
currentLn = ln;
}
public int getEndLn() {
return currentLn;
}
public void newline() {
currentLn++;
lastNewline = outputLength();
}
private int outputLength() {
return printer.output().length();
}
public void setUnitPrinter(UnitPrinter up) {
printer = up;
}
}