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50 lines
1.4 KiB
50 lines
1.4 KiB
// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
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package org.jetbrains.java.decompiler.struct.attr;
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import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
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import org.jetbrains.java.decompiler.util.DataInputFullStream;
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import org.jetbrains.java.decompiler.util.InterpreterUtil;
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import java.io.IOException;
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/**
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* u2 line_number_table_length;
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* { u2 start_pc;
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* u2 line_number;
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* } line_number_table[line_number_table_length];
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*
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* Created by Egor on 05.10.2014.
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*/
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public class StructLineNumberTableAttribute extends StructGeneralAttribute {
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private int[] myLineInfo = InterpreterUtil.EMPTY_INT_ARRAY;
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@Override
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public void initContent(DataInputFullStream data, ConstantPool pool) throws IOException {
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int len = data.readUnsignedShort() * 2;
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if (len > 0) {
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myLineInfo = new int[len];
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for (int i = 0; i < len; i += 2) {
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myLineInfo[i] = data.readUnsignedShort();
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myLineInfo[i + 1] = data.readUnsignedShort();
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}
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}
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else if (myLineInfo.length > 0) {
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myLineInfo = InterpreterUtil.EMPTY_INT_ARRAY;
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}
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}
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public int findLineNumber(int pc) {
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if (myLineInfo.length >= 2) {
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for (int i = myLineInfo.length - 2; i >= 0; i -= 2) {
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if (pc >= myLineInfo[i]) {
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return myLineInfo[i + 1];
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}
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}
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}
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return -1;
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}
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public int[] getRawData() {
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return myLineInfo;
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}
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} |