package jvm.classfile.attribute.parser.impl;
import jvm.classfile.attribute.item.AttributeInfo;
import jvm.classfile.attribute.item.impl.LocalVariableTableAttr;
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 LocalVariableTableParser implements AttributeInfoParser {
@Override
public AttributeInfo parse(int attrNameIndex, int attrLen,
ByteCodeIterator iterator, ConstantPool constantPool) {
int tableLen = iterator.nextU2ToInt();
List<LocalVariableTableAttr.LocalVariableItem> items = new ArrayList<>();
for (int i = 0; i < tableLen; ++i) {
int startPC = iterator.nextU2ToInt();
int length = iterator.nextU2ToInt();
int nameIndex = iterator.nextU2ToInt();
int descIndex = iterator.nextU2ToInt();
int index = iterator.nextU2ToInt();
LocalVariableTableAttr.LocalVariableItem item =
new LocalVariableTableAttr.LocalVariableItem(
startPC, length, nameIndex, descIndex, index);
items.add(item);
}
return new LocalVariableTableAttr(attrNameIndex, attrLen ,items);
}
}