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PlantUML is a component that allows to quickly write diagrams from text.
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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
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 * https://plantuml.com/patreon (only 1$ per month!)
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
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 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.code;

import java.io.IOException;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

@Deprecated
public class CompressionZlibAttic implements Compression {
	// ::remove file when __CORE__

	private static boolean USE_ZOPFLI = false;
	private static final int COMPRESSION_LEVEL = 9;

	public byte[] compress(byte[] in) {
		if (USE_ZOPFLI)
			return new CompressionZopfliZlib().compress(in);

		if (in.length == 0)
			return null;

		int len = in.length * 2;
		if (len < 1000)
			len = 1000;

		byte[] result = null;
		result = tryCompress(in, len);
		return result;
	}

	private byte[] tryCompress(byte[] in, final int len) {
		// Compress the bytes
		final Deflater compresser = new Deflater(COMPRESSION_LEVEL, true);
		compresser.setInput(in);
		compresser.finish();

		final byte[] output = new byte[len];
		final int compressedDataLength = compresser.deflate(output);
		if (compresser.finished() == false)
			return null;

		return copyArray(output, compressedDataLength);
	}

	public ByteArray decompress(byte[] in) throws NoPlantumlCompressionException {
		try {
			final byte in2[] = new byte[in.length + 256];
			System.arraycopy(in, 0, in2, 0, in.length);

			int len = 100_000;
			byte[] result = null;
			result = tryDecompress(in2, len);
			if (result == null)
				throw new NoPlantumlCompressionException("Too big?");

			return ByteArray.from(result);
		} catch (IOException e) {
			// Logme.error(e);
			throw new NoPlantumlCompressionException(e);
		}

	}

	private byte[] tryDecompress(byte[] in, final int len) throws IOException {
		if (len > 200_000)
			throw new IOException("OutOfMemory");

		// Decompress the bytes
		final byte[] tmp = new byte[len];
		final Inflater decompresser = new Inflater(true);
		decompresser.setInput(in);
		try {
			final int resultLength = decompresser.inflate(tmp);
			if (decompresser.finished() == false)
				return null;

			decompresser.end();

			final byte[] result = copyArray(tmp, resultLength);
			return result;
		} catch (DataFormatException e) {
			// Logme.error(e);
			throw new IOException(e.toString());
		}
	}

	private byte[] copyArray(final byte[] data, final int len) {
		final byte[] result = new byte[len];
		System.arraycopy(data, 0, result, 0, len);
		return result;
	}

}