net.sourceforge.plantuml.brotli.Context Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of plantuml-gplv2 Show documentation
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.brotli;

/**
 * Common context lookup table for all context modes.
 */
final class Context {

	static final int[] LOOKUP = new int[2048];

	private static final String UTF_MAP = "         !!  !                  \"#$##%#$&'##(#)#+++++++++"
			+ "+((&*'##,---,---,-----,-----,-----&#'###.///.///./////./////./////&#'# ";
	private static final String UTF_RLE = "A/*  ':  & : $  \u0081 @";

	private static void unpackLookupTable(int[] lookup, String map, String rle) {
		// LSB6, MSB6, SIGNED
		for (int i = 0; i < 256; ++i) {
			lookup[i] = i & 0x3F;
			lookup[512 + i] = i >> 2;
			lookup[1792 + i] = 2 + (i >> 6);
		}
		// UTF8
		for (int i = 0; i < 128; ++i) {
			lookup[1024 + i] = 4 * (map.charAt(i) - 32);
		}
		for (int i = 0; i < 64; ++i) {
			lookup[1152 + i] = i & 1;
			lookup[1216 + i] = 2 + (i & 1);
		}
		int offset = 1280;
		for (int k = 0; k < 19; ++k) {
			int value = k & 3;
			int rep = rle.charAt(k) - 32;
			for (int i = 0; i < rep; ++i) {
				lookup[offset++] = value;
			}
		}
		// SIGNED
		for (int i = 0; i < 16; ++i) {
			lookup[1792 + i] = 1;
			lookup[2032 + i] = 6;
		}
		lookup[1792] = 0;
		lookup[2047] = 7;
		for (int i = 0; i < 256; ++i) {
			lookup[1536 + i] = lookup[1792 + i] << 3;
		}
	}

	static {
		unpackLookupTable(LOOKUP, UTF_MAP, UTF_RLE);
	}
}