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86 lines
2.4 KiB
Java
86 lines
2.4 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.code;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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public class Upf9Decoder {
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private Upf9Decoder() {
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}
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static int decodeChar(InputStream is) throws IOException {
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final int read0 = is.read();
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if (read0 == -1) {
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return -1;
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}
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if (read0 == 0x0B) {
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final int read1 = is.read();
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if (read1 >= 0x80)
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return (char) read1;
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return (char) ((0xE0 << 8) + read1);
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}
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if (read0 == 0x0C) {
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final int read1 = is.read();
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final int read2 = is.read();
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return (char) ((read1 << 8) + read2);
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}
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if (read0 >= 0x01 && read0 <= 0x08) {
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final int read1 = is.read();
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return (char) ((read0 << 8) + read1);
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}
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if (read0 >= 0x80 && read0 <= 0xFF) {
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final int read1 = is.read();
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return (char) (((read0 - 0x60) << 8) + read1);
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}
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return (char) read0;
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}
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public static String decodeString(byte[] data, int length) throws IOException {
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final ByteArrayInputStream bais = new ByteArrayInputStream(data, 0, length);
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final StringBuilder result = new StringBuilder();
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int read;
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while ((read = decodeChar(bais)) != -1) {
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result.append((char) read);
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}
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bais.close();
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return result.toString();
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}
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}
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