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/*
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package flash.swf;

import flash.swf.debug.DebugModule;
import flash.swf.debug.LineRecord;
import flash.swf.debug.RegisterRecord;
import flash.swf.types.FlashUUID;
import flash.util.FileUtils;
import flash.util.IntMap;

import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.File;
import java.util.ArrayList;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * The swd file format is as follows
 *
 * swd(header) (tag)*
 */
public class DebugDecoder
{
	public static final int
		kDebugScript=0,
		kDebugOffset=1,
		kDebugBreakpoint=2,
		kDebugID=3,
		kDebugRegisters=5
	;

    /**
     * table of line numbers, indexed by offset in the SWF file
     */
    private SwfDecoder in;
    private IntMap modules = new IntMap();

    public DebugDecoder(byte[] b)
    {
        this(new ByteArrayInputStream(b));
    }

    public DebugDecoder(InputStream in)
    {
        this.in = new SwfDecoder(in, 0);
    }

    public void readSwd(DebugHandler h) throws IOException
    {
        readHeader(h);
        readTags(h);
    }

    void readHeader(DebugHandler handler) throws IOException
    {
        byte[] sig = new byte[4];

        in.readFully(sig);

        if (sig[0] != 'F' || sig[1] != 'W' || sig[2] != 'D' || sig[3] < 6)
        {
            throw new SwfFormatException("not a Flash 6 or later SWD file");
        }

		in.swfVersion = sig[3];

        handler.header(in.swfVersion);
    }

	public void setTagData(byte[] b) throws IOException
	{
		in = new SwfDecoder(b, 0);
	}

    public void readTags(DebugHandler handler) throws IOException
    {
    	//