package jvm.classfile.attribute.parser.impl;
import jvm.classfile.attribute.item.AttributeInfo;
import jvm.classfile.attribute.item.impl.LineNumberTableAttr;
import jvm.classfile.attribute.parser.AttributeInfoParser;
import jvm.classfile.ConstantPool;
import jvm.util.ByteCodeIterator;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Haochen on 2017/4/13.
* TODO:
*/
public class LineNumberTableParser implements AttributeInfoParser {
@Override
public AttributeInfo parse(int attrNameIndex, int attrLen,
ByteCodeIterator iterator, ConstantPool constantPool) {
int tableLength = iterator.nextU2ToInt();
List<LineNumberTableAttr.LineNumberItem> items = new ArrayList<>();
for (int i = 0; i < tableLength; ++i) {
int startPC = iterator.nextU2ToInt();
int lineNumber = iterator.nextU2ToInt();
LineNumberTableAttr.LineNumberItem item =
new LineNumberTableAttr.LineNumberItem(startPC, lineNumber);
items.add(item);
}
return new LineNumberTableAttr(attrNameIndex, attrLen, items);
}
}