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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.
/* +=======================================================================
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 * |      PlantUML : a free UML diagram generator
 * |
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * Project Info:  https://plantuml.com
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 * under the terms of the GNU Lesser General Public License as published by
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 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
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 * along with this library.  If not, see .
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 * (see https://plantuml.com/graphviz-dot )
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 * Icons provided by OpenIconic :  https://useiconic.com/open
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 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
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 */
package net.sourceforge.plantuml.code;

public class AsciiEncoderFinalZeros {
	// ::remove file when __CORE__

	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);
		}
		while (result.length() > 0 && result.charAt(result.length() - 1) == '0') {
			result.setLength(result.length() - 1);
		}
		return result.toString();
	}

	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(AsciiEncoder.encode6bit[c1 & 0x3F]);
		sb.append(AsciiEncoder.encode6bit[c2 & 0x3F]);
		sb.append(AsciiEncoder.encode6bit[c3 & 0x3F]);
		sb.append(AsciiEncoder.encode6bit[c4 & 0x3F]);
	}

}