package net.minecraft.src;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class CompressedStreamTools
{
    /**
     * Load the gzipped compound from the inputstream.
     */
    public static NBTTagCompound readCompressed(InputStream par0InputStream) throws IOException
    {
        DataInputStream var1 = new DataInputStream(new BufferedInputStream(new GZIPInputStream(par0InputStream)));
        NBTTagCompound var2;

        try
        {
            var2 = read(var1);
        }
        finally
        {
            var1.close();
        }

        return var2;
    }

    /**
     * Write the compound, gzipped, to the outputstream.
     */
    public static void writeCompressed(NBTTagCompound par0NBTTagCompound, OutputStream par1OutputStream) throws IOException
    {
        DataOutputStream var2 = new DataOutputStream(new GZIPOutputStream(par1OutputStream));

        try
        {
            write(par0NBTTagCompound, var2);
        }
        finally
        {
            var2.close();
        }
    }

    public static NBTTagCompound decompress(byte[] par0ArrayOfByte) throws IOException
    {
        DataInputStream var1 = new DataInputStream(new BufferedInputStream(new GZIPInputStream(new ByteArrayInputStream(par0ArrayOfByte))));
        NBTTagCompound var2;

        try
        {
            var2 = read(var1);
        }
        finally
        {
            var1.close();
        }

        return var2;
    }

    public static byte[] compress(NBTTagCompound par0NBTTagCompound) throws IOException
    {
        ByteArrayOutputStream var1 = new ByteArrayOutputStream();
        DataOutputStream var2 = new DataOutputStream(new GZIPOutputStream(var1));

        try
        {
            write(par0NBTTagCompound, var2);
        }
        finally
        {
            var2.close();
        }

        return var1.toByteArray();
    }

    public static NBTTagCompound readUncompressed(byte[] par0ArrayOfByte) throws IOException {
		DataInputStream var1 = new DataInputStream(new BufferedInputStream(new ByteArrayInputStream(par0ArrayOfByte)));
		NBTTagCompound var2;

		try {
			var2 = read(var1);
		} finally {
			var1.close();
		}

		return var2;
	}

	public static byte[] writeUncompressed(NBTTagCompound par0NBTTagCompound) throws IOException {
		ByteArrayOutputStream var1 = new ByteArrayOutputStream();
		DataOutputStream var2 = new DataOutputStream(var1);

		try {
			write(par0NBTTagCompound, var2);
		} finally {
			var2.close();
		}

		return var1.toByteArray();
	}

    public static void safeWrite(NBTTagCompound par0NBTTagCompound, File par1File) throws IOException
    {
        File var2 = new File(par1File.getAbsolutePath() + "_tmp");

        if (var2.exists())
        {
            var2.delete();
        }

        write(par0NBTTagCompound, var2);

        if (par1File.exists())
        {
            par1File.delete();
        }

        if (par1File.exists())
        {
            throw new IOException("Failed to delete " + par1File);
        }
        else
        {
            var2.renameTo(par1File);
        }
    }

    public static void write(NBTTagCompound par0NBTTagCompound, File par1File) throws IOException
    {
        DataOutputStream var2 = new DataOutputStream(new FileOutputStream(par1File));

        try
        {
            write(par0NBTTagCompound, var2);
        }
        finally
        {
            var2.close();
        }
    }

    public static NBTTagCompound read(File par0File) throws IOException
    {
        if (!par0File.exists())
        {
            return null;
        }
        else
        {
            DataInputStream var1 = new DataInputStream(new FileInputStream(par0File));
            NBTTagCompound var2;

            try
            {
                var2 = read(var1);
            }
            finally
            {
                var1.close();
            }

            return var2;
        }
    }

    /**
     * Reads from a CompressedStream.
     */
    public static NBTTagCompound read(DataInput par0DataInput) throws IOException
    {
        NBTBase var1 = NBTBase.readNamedTag(par0DataInput);

        if (var1 instanceof NBTTagCompound)
        {
            return (NBTTagCompound)var1;
        }
        else
        {
            throw new IOException("Root tag must be a named compound tag");
        }
    }

    public static void write(NBTTagCompound par0NBTTagCompound, DataOutput par1DataOutput) throws IOException
    {
        NBTBase.writeNamedTag(par0NBTTagCompound, par1DataOutput);
    }
}
