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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// 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:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * 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.
 *
 * 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
 *
 * 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 GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 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.deflate;

/* 
 * Simple DEFLATE decompressor
 * Copyright (c) Project Nayuki
 * 
 * https://www.nayuki.io/page/simple-deflate-decompressor
 * https://github.com/nayuki/Simple-DEFLATE-decompressor
 */

import java.io.Closeable;
import java.io.EOFException;
import java.io.IOException;

/**
 * A stream of bits that can be read. Bits are packed in little endian within a
 * byte. For example, the byte 0x87 reads as the sequence of bits
 * [1,1,1,0,0,0,0,1].
 */
public interface BitInputStream extends Closeable {

	/**
	 * Returns the current bit position, which ascends from 0 to 7 as bits are read.
	 * 
	 * @return the current bit position, which is between 0 and 7
	 */
	public int getBitPosition();

	/**
	 * Discards the remainder of the current byte (if any) and reads the next whole
	 * byte from the stream. Returns -1 if the end of stream is reached.
	 * 
	 * @return the next byte from the stream, or -1 if the end of stream is reached
	 */
	public int readByte() throws IOException;

	/**
	 * Reads a bit from this stream. Returns 0 or 1 if a bit is available, or -1 if
	 * the end of stream is reached. The end of stream always occurs on a byte
	 * boundary.
	 * 
	 * @return the next bit of 0 or 1, or -1 for the end of stream
	 * @throws IOException if an I/O exception occurred
	 */
	public int read() throws IOException;

	/**
	 * Reads a bit from this stream. Returns 0 or 1 if a bit is available, or throws
	 * an {@code EOFException} if the end of stream is reached. The end of stream
	 * always occurs on a byte boundary.
	 * 
	 * @return the next bit of 0 or 1
	 * @throws IOException  if an I/O exception occurred
	 * @throws EOFException if the end of stream is reached
	 */
	public int readNoEof() throws IOException;

	/**
	 * Closes this stream and the underlying input stream.
	 * 
	 * @throws IOException if an I/O exception occurred
	 */
	public void close() throws IOException;

}