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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 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;
public class AsciiEncoder implements URLEncoder {
// Temporary because of AsciiEncoderFinalZeros
final static/* private */char encode6bit[] = new char[64];
final static/* private */byte decode6bit[] = new byte[128];
static {
for (byte b = 0; b < 64; b++) {
encode6bit[b] = encode6bit(b);
decode6bit[encode6bit[b]] = b;
}
}
public String encode(byte data[]) {
if (data == null)
return "";
final StringBuilder result = new StringBuilder((data.length * 4 + 2) / 3);
for (int i = 0; i < data.length; i += 3)
append3bytes(result, data[i] & 0xFF, i + 1 < data.length ? data[i + 1] & 0xFF : 0,
i + 2 < data.length ? data[i + 2] & 0xFF : 0);
return result.toString();
}
public byte[] decode(String s) {
// if (s.length() % 4 != 0) {
// throw new IllegalArgumentException("Cannot decode " + s);
// }
final byte data[] = new byte[computeSize(s.length())];
int pos = 0;
for (int i = 0; i < s.length(); i += 4) {
decode3bytes(data, pos, scharAt(s, i), scharAt(s, i + 1), scharAt(s, i + 2), scharAt(s, i + 3));
pos += 3;
}
return data;
}
private int computeSize(int length) {
// while (length % 4 != 0) {
// length++;
// }
final int r = length % 4;
if (r != 0)
length += 4 - r;
// System.err.println("length=" + length);
// System.err.println("length1=" + (length % 4));
// length += length % 4;
// System.err.println("length2=" + length);
assert length % 4 == 0 : "length=" + length;
return (length * 3 + 3) / 4;
}
private char scharAt(String s, int i) {
if (i >= s.length())
return '0';
return s.charAt(i);
}
public static int decode6bit(char c) {
return decode6bit[c];
}
public static char encode6bit(byte b) {
assert b >= 0 && b < 64;
if (b < 10)
return (char) ('0' + b);
b -= 10;
if (b < 26)
return (char) ('A' + b);
b -= 26;
if (b < 26)
return (char) ('a' + b);
b -= 26;
if (b == 0)
return '-';
if (b == 1) {
return '_';
}
assert false;
return '?';
}
private void append3bytes(StringBuilder sb, int b1, int b2, int b3) {
final int c1 = b1 >> 2;
final int c2 = ((b1 & 0x3) << 4) | (b2 >> 4);
final int c3 = ((b2 & 0xF) << 2) | (b3 >> 6);
final int c4 = b3 & 0x3F;
sb.append(encode6bit[c1 & 0x3F]);
sb.append(encode6bit[c2 & 0x3F]);
sb.append(encode6bit[c3 & 0x3F]);
sb.append(encode6bit[c4 & 0x3F]);
}
private void decode3bytes(byte r[], int pos, char cc1, char cc2, char cc3, char cc4) {
final int c1 = decode6bit[cc1];
final int c2 = decode6bit[cc2];
final int c3 = decode6bit[cc3];
final int c4 = decode6bit[cc4];
r[pos] = (byte) ((c1 << 2) | (c2 >> 4));
r[pos + 1] = (byte) (((c2 & 0x0F) << 4) | (c3 >> 2));
r[pos + 2] = (byte) (((c3 & 0x3) << 6) | c4);
}
}