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PlantUML is a component that allows to quickly write diagrams from text.
// 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 MIT License.
*
* See http://opensource.org/licenses/MIT
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* 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 MIT license.
*
* The generated images can then be used without any reference to the MIT 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.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Objects;
/**
* A stream of bits that can be read. Because they come from an underlying byte
* stream, the total number of bits is always a multiple of 8. The bits are read
* in little endian. Mutable and not thread-safe.
*/
public final class ByteBitInputStream implements BitInputStream {
/*---- Fields ----*/
// The underlying byte stream to read from (not null).
private InputStream input;
// Either in the range [0x00, 0xFF] if bits are available, or -1 if end of
// stream is reached.
private int currentByte;
// Number of remaining bits in the current byte, always between 0 and 7
// (inclusive).
private int numBitsRemaining;
/*---- Constructor ----*/
/**
* Constructs a bit input stream based on the specified byte input stream.
*
* @param in the byte input stream (not {@code null})
* @throws NullPointerException if the input stream is {@code null}
*/
public ByteBitInputStream(InputStream in) {
input = Objects.requireNonNull(in);
currentByte = 0;
numBitsRemaining = 0;
}
/*---- Methods ----*/
public int getBitPosition() {
if (numBitsRemaining < 0 || numBitsRemaining > 7)
throw new IllegalStateException();
return (8 - numBitsRemaining) % 8;
}
public int readByte() throws IOException {
currentByte = 0;
numBitsRemaining = 0;
return input.read();
}
public int read() throws IOException {
if (currentByte == -1)
return -1;
if (numBitsRemaining == 0) {
currentByte = input.read();
if (currentByte == -1)
return -1;
numBitsRemaining = 8;
}
if (numBitsRemaining <= 0)
throw new IllegalStateException();
numBitsRemaining--;
return (currentByte >>> (7 - numBitsRemaining)) & 1;
}
public int readNoEof() throws IOException {
int result = read();
if (result == -1)
throw new EOFException();
return result;
}
public void close() throws IOException {
input.close();
currentByte = -1;
numBitsRemaining = 0;
}
}