itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/pdf/fonts/cmaps/CMapParserEx.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf.fonts.cmaps;

import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.pdf.PRTokeniser;
import com.itextpdf.text.pdf.PdfContentParser;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfString;
import java.io.IOException;
import java.util.ArrayList;

/**
 *
 * @author psoares
 */
public class CMapParserEx {
    
    private static final PdfName CMAPNAME = new PdfName("CMapName");
    private static final String DEF = "def";
    private static final String ENDCIDRANGE = "endcidrange";
    private static final String ENDCIDCHAR = "endcidchar";
    private static final String ENDBFRANGE = "endbfrange";
    private static final String ENDBFCHAR = "endbfchar";
    private static final String USECMAP = "usecmap";
    private static final int MAXLEVEL = 10;
    
    public static void parseCid(String cmapName, AbstractCMap cmap, CidLocation location) throws IOException {
        parseCid(cmapName, cmap, location, 0);
    }
    
    private static void parseCid(String cmapName, AbstractCMap cmap, CidLocation location, int level) throws IOException {
        if (level >= MAXLEVEL)
            return;
        PRTokeniser inp = location.getLocation(cmapName);
        try {
            ArrayList<PdfObject> list = new ArrayList<PdfObject>();
            PdfContentParser cp = new PdfContentParser(inp);
            int maxExc = 50;
            while (true) {
                try {
                    cp.parse(list);
                }
                catch (Exception ex) {
                    if (--maxExc < 0)
                        break;
                    continue;
                }
                if (list.isEmpty())
                    break;
                String last = list.get(list.size() - 1).toString();
                if (level == 0 && list.size() == 3 && last.equals(DEF)) {
                    PdfObject key = list.get(0);
                    if (PdfName.REGISTRY.equals(key))
                        cmap.setRegistry(list.get(1).toString());
                    else if (PdfName.ORDERING.equals(key))
                        cmap.setOrdering(list.get(1).toString());
                    else if (CMAPNAME.equals(key))
                        cmap.setName(list.get(1).toString());
                    else if (PdfName.SUPPLEMENT.equals(key)) {
                        try {
                            cmap.setSupplement(((PdfNumber)list.get(1)).intValue());
                        }
                        catch (Exception ex) {}
                    }
                }
                else if ((last.equals(ENDCIDCHAR) || last.equals(ENDBFCHAR)) && list.size() >= 3) {
                    int lmax = list.size() - 2;
                    for (int k = 0; k < lmax; k += 2) {
                        if (list.get(k) instanceof PdfString) {
                            cmap.addChar((PdfString)list.get(k), list.get(k + 1));
                        }
                    }
                }
                else if ((last.equals(ENDCIDRANGE) || last.equals(ENDBFRANGE)) && list.size() >= 4) {
                    int lmax = list.size() - 3;
                    for (int k = 0; k < lmax; k += 3) {
                        if (list.get(k) instanceof PdfString && list.get(k + 1) instanceof PdfString) {
                            cmap.addRange((PdfString)list.get(k), (PdfString)list.get(k + 1), list.get(k + 2));
                        }
                    }
                }
                else if (last.equals(USECMAP) && list.size() == 2 && list.get(0) instanceof PdfName) {
                    parseCid(PdfName.decodeName(list.get(0).toString()), cmap, location, level + 1);
                }
            }
        }
        finally {
            inp.close();
        }
    }
    
    private static void encodeSequence(int size, byte seqs[], char cid, ArrayList<char[]> planes) {
        --size;
        int nextPlane = 0;
        for (int idx = 0; idx < size; ++idx) {
            char plane[] = planes.get(nextPlane);
            int one = seqs[idx] & 0xff;
            char c = plane[one];
            if (c != 0 && (c & 0x8000) == 0)
                throw new RuntimeException(MessageLocalization.getComposedMessage("inconsistent.mapping"));
            if (c == 0) {
                planes.add(new char[256]);
                c = (char)(planes.size() - 1 | 0x8000);
                plane[one] = c;
            }
            nextPlane = c & 0x7fff;
        }
        char plane[] = planes.get(nextPlane);
        int one = seqs[size] & 0xff;
        char c = plane[one];
        if ((c & 0x8000) != 0)
            throw new RuntimeException(MessageLocalization.getComposedMessage("inconsistent.mapping"));
        plane[one] = cid;
    }
    
}

⏎ com/itextpdf/text/pdf/fonts/cmaps/CMapParserEx.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
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