/**
 * Copyright (C) 2002 Bas  Peters
 * Copyright (C) 2002 Yves Pratter
 *
 * This file is part of MARC4J
 *
 * MARC4J is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * MARC4J 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with MARC4J; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.marc4j.converter.impl;

import org.marc4j.converter.CharConverter;

/**
 * <p>
 * A utility to convert ISO 6937 data to UCS/Unicode.
 * </p>
 * 
 * @author Bas Peters
 * @author Yves Pratter
 */
public class Iso6937ToUnicode extends CharConverter {

    /**
     * <p>
     * Converts ISO 6937 data to UCS/Unicode.
     * </p>
     * 
     * @param data - the ISO 6937 data in an array of char
     * @return {@link String}- the UCS/Unicode data
     */
    @Override
    public String convert(final char data[]) {
        final StringBuffer sb = new StringBuffer();

        for (int i = 0; i < data.length; i++) {
            final char c = data[i];
            final int len = data.length;

            if (isAscii(c)) {
                sb.append(c);
            } else if (isCombining(c) && hasNext(i, len)) {
                final char d = getCombiningChar(c * 256 + data[i + 1]);

                if (d != 0) {
                    sb.append(d);
                    i++;
                } else {
                    sb.append(getChar(c));
                }
            } else {
                sb.append(getChar(c));
            }
        }

        return sb.toString();
    }

    private boolean hasNext(final int pos, final int len) {
        if (pos < (len - 1)) {
            return true;
        }

        return false;
    }

    private boolean isAscii(final int i) {
        if (i >= 0x00 && i <= 0x7F) {
            return true;
        }

        return false;
    }

    private boolean isCombining(final int i) {
        if (i >= 0xC0 && i <= 0xDF) {
            return true;
        }

        return false;
    }

    /**
     * Should return true if the CharConverter outputs Unicode encoded
     * characters
     * 
     * @return boolean whether the CharConverter returns Unicode encoded
     *         characters
     */
    @Override
    public boolean outputsUnicode() {
        return (true);
    }

    // Source : http://anubis.dkuug.dk/JTC1/SC2/WG3/docs/6937cd.pdf
    private char getChar(final int i) {
        switch (i) {
            case 0xA0:
                return 0x00A0; // 10/00 NO-BREAK SPACE
            case 0xA1:
                return 0x00A1; // 10/01 INVERTED EXCLAMATION MARK
            case 0xA2:
                return 0x00A2; // 10/02 CENT SIGN
            case 0xA3:
                return 0x00A3; // 10/03 POUND SIGN
                // 10/04 (This position shall not be used)
            case 0xA5:
                return 0x00A5; // 10/05 YEN SIGN
                // 10/06 (This position shall not be used)
            case 0xA7:
                return 0x00A7; // 10/07 SECTION SIGN
            case 0xA8:
                return 0x00A4; // 10/08 CURRENCY SIGN
            case 0xA9:
                return 0x2018; // 10/09 LEFT SINGLE QUOTATION MARK
            case 0xAA:
                return 0x201C; // 10/10 LEFT DOUBLE QUOTATION MARK
            case 0xAB:
                return 0x00AB; // 10/11 LEFT-POINTING DOUBLE ANGLE QUOTATION
                               // MARK
            case 0xAC:
                return 0x2190; // 10/12 LEFTWARDS ARROW
            case 0xAD:
                return 0x2191; // 10/13 UPWARDS ARROW
            case 0xAE:
                return 0x2192; // 10/14 RIGHTWARDS ARROW
            case 0xAF:
                return 0x2193; // 10/15 DOWNWARDS ARROW

            case 0xB0:
                return 0x00B0; // 11/00 DEGREE SIGN
            case 0xB1:
                return 0x00B1; // 11/01 PLUS-MINUS SIGN
            case 0xB2:
                return 0x00B2; // 11/02 SUPERSCRIPT TWO
            case 0xB3:
                return 0x00B3; // 11/03 SUPERSCRIPT THREE
            case 0xB4:
                return 0x00D7; // 11/04 MULTIPLICATION SIGN
            case 0xB5:
                return 0x00B5; // 11/05 MICRO SIGN
            case 0xB6:
                return 0x00B6; // 11/06 PILCROW SIGN
            case 0xB7:
                return 0x00B7; // 11/07 MIDDLE DOT
            case 0xB8:
                return 0x00F7; // 11/08 DIVISION SIGN
            case 0xB9:
                return 0x2019; // 11/09 RIGHT SINGLE QUOTATION MARK
            case 0xBA:
                return 0x201D; // 11/10 RIGHT DOUBLE QUOTATION MARK
            case 0xBB:
                return 0x00BB; // 11/11 RIGHT-POINTING DOUBLE ANGLE QUOTATION
                               // MARK
            case 0xBC:
                return 0x00BC; // 11/12 VULGAR FRACTION ONE QUARTER
            case 0xBD:
                return 0x00BD; // 11/13 VULGAR FRACTION ONE HALF
            case 0xBE:
                return 0x00BE; // 11/14 VULGAR FRACTION THREE QUARTERS
            case 0xBF:
                return 0x00BF; // 11/15 INVERTED QUESTION MARK

                // 4/0 to 5/15 diacritic characters

            case 0xD0:
                return 0x2015; // 13/00 HORIZONTAL BAR
            case 0xD1:
                return 0x00B9; // 13/01 SUPERSCRIPT ONE
            case 0xD2:
                return 0x2117; // 13/02 REGISTERED SIGN
            case 0xD3:
                return 0x00A9; // 13/03 COPYRIGHT SIGN
            case 0xD4:
                return 0x00AE; // 13/04 TRADE MARK SIGN
            case 0xD5:
                return 0x266A; // 13/05 EIGHTH NOTE
            case 0xD6:
                return 0x00AC; // 13/06 NOT SIGN
            case 0xD7:
                return 0x00A6; // 13/07 BROKEN BAR
                // 13/08 (This position shall not be used)
                // 13/09 (This position shall not be used)
                // 13/10 (This position shall not be used)
                // 13/11 (This position shall not be used)
            case 0xDC:
                return 0x215B; // 13/12 VULGAR FRACTION ONE EIGHTH
            case 0xDF:
                return 0x215E; // 13/15 VULGAR FRACTION SEVEN EIGHTHS

            case 0xE0:
                return 0x2126; // 14/00 OHM SIGN
            case 0xE1:
                return 0x00C6; // 14/01 LATIN CAPITAL LETTER AE
            case 0xE2:
                return 0x0110; // 14/02 LATIN CAPITAL LETTER D WITH STROKE
            case 0xE3:
                return 0x00AA; // 14/03 FEMININE ORDINAL INDICATOR
            case 0xE4:
                return 0x0126; // 14/04 LATIN CAPITAL LETTER H WITH STROKE
                // 14/05 (This position shall not be used)
            case 0xE6:
                return 0x0132; // 14/06 LATIN CAPITAL LIGATURE IJ
            case 0xE7:
                return 0x013F; // 14/07 LATIN CAPITAL LETTER L WITH MIDDLE DOT
            case 0xE8:
                return 0x0141; // 14/08 LATIN CAPITAL LETTER L WITH STROKE
            case 0xE9:
                return 0x00D8; // 14/09 LATIN CAPITAL LETTER O WITH STROKE
            case 0xEA:
                return 0x0152; // 14/10 LATIN CAPITAL LIGATURE OE
            case 0xEB:
                return 0x00BA; // 14/11 MASCULINE ORDINAL INDICATOR
            case 0xEC:
                return 0x00DE; // 14/12 LATIN CAPITAL LETTER THORN
            case 0xED:
                return 0x0166; // 14/13 LATIN CAPITAL LETTER T WITH STROKE
            case 0xEE:
                return 0x014A; // 14/14 LATIN CAPITAL LETTER ENG
            case 0xEF:
                return 0x0149; // 14/15 LATIN SMALL LETTER N PRECEDED BY
                               // APOSTROPHE

            case 0xF0:
                return 0x0138; // 15/00 LATIN SMALL LETTER KRA
            case 0xF1:
                return 0x00E6; // 15/01 LATIN SMALL LETTER AE
            case 0xF2:
                return 0x0111; // 15/02 LATIN SMALL LETTER D WITH STROKE
            case 0xF3:
                return 0x00F0; // 15/03 LATIN SMALL LETTER ETH
            case 0xF4:
                return 0x0127; // 15/04 LATIN SMALL LETTER H WITH STROKE
            case 0xF5:
                return 0x0131; // 15/05 LATIN SMALL LETTER DOTLESS I
            case 0xF6:
                return 0x0133; // 15/06 LATIN SMALL LIGATURE IJ
            case 0xF7:
                return 0x0140; // 15/07 LATIN SMALL LETTER L WITH MIDDLE DOT
            case 0xF8:
                return 0x0142; // 15/08 LATIN SMALL LETTER L WITH STROKE
            case 0xF9:
                return 0x00F8; // 15/09 LATIN SMALL LETTER O WITH STROKE
            case 0xFA:
                return 0x0153; // 15/10 LATIN SMALL LIGATURE OE
            case 0xFB:
                return 0x00DF; // 15/11 LATIN SMALL LETTER SHARP S
            case 0xFC:
                return 0x00FE; // 15/12 LATIN SMALL LETTER THORN
            case 0xFD:
                return 0x0167; // 15/13 LATIN SMALL LETTER T WITH STROKE
            case 0xFE:
                return 0x014B; // 15/14 LATIN SMALL LETTER ENG
            case 0xFF:
                return 0x00AD; // 15/15 SOFT HYPHEN$

            default:
                return (char) i;
        }
    }

    private char getCombiningChar(final int i) {
        switch (i) {
        // 12/00 (This position shall not be used)

        // 12/01 non-spacing grave accent
            case 0xC141:
                return 0x00C0; // LATIN CAPITAL LETTER A WITH GRAVE
            case 0xC145:
                return 0x00C8; // LATIN CAPITAL LETTER E WITH GRAVE
            case 0xC149:
                return 0x00CC; // LATIN CAPITAL LETTER I WITH GRAVE
            case 0xC14F:
                return 0x00D2; // LATIN CAPITAL LETTER O WITH GRAVE
            case 0xC155:
                return 0x00D9; // LATIN CAPITAL LETTER U WITH GRAVE
            case 0xC161:
                return 0x00E0; // LATIN SMALL LETTER A WITH GRAVE
            case 0xC165:
                return 0x00E8; // LATIN SMALL LETTER E WITH GRAVE
            case 0xC169:
                return 0x00EC; // LATIN SMALL LETTER I WITH GRAVE
            case 0xC16F:
                return 0x00F2; // LATIN SMALL LETTER O WITH GRAVE
            case 0xC175:
                return 0x00F9; // LATIN SMALL LETTER U WITH GRAVE

                // 12/02 non-spacing acute accent
            case 0xC220:
                return 0x00B4; // ACUTE ACCENT
            case 0xC241:
                return 0x00C1; // LATIN CAPITAL LETTER A WITH ACUTE
            case 0xC243:
                return 0x0106; // LATIN CAPITAL LETTER C WITH ACUTE
            case 0xC245:
                return 0x00C9; // LATIN CAPITAL LETTER E WITH ACUTE
            case 0xC249:
                return 0x00CD; // LATIN CAPITAL LETTER I WITH ACUTE
            case 0xC24C:
                return 0x0139; // LATIN CAPITAL LETTER L WITH ACUTE
            case 0xC24E:
                return 0x0143; // LATIN CAPITAL LETTER N WITH ACUTE
            case 0xC24F:
                return 0x00D3; // LATIN CAPITAL LETTER O WITH ACUTE
            case 0xC252:
                return 0x0154; // LATIN CAPITAL LETTER R WITH ACUTE
            case 0xC253:
                return 0x015A; // LATIN CAPITAL LETTER S WITH ACUTE
            case 0xC255:
                return 0x00DA; // LATIN CAPITAL LETTER U WITH ACUTE
            case 0xC259:
                return 0x00DD; // LATIN CAPITAL LETTER Y WITH ACUTE
            case 0xC25A:
                return 0x0179; // LATIN CAPITAL LETTER Z WITH ACUTE
            case 0xC261:
                return 0x00E1; // LATIN SMALL LETTER A WITH ACUTE
            case 0xC263:
                return 0x0107; // LATIN SMALL LETTER C WITH ACUTE
            case 0xC265:
                return 0x00E9; // LATIN SMALL LETTER E WITH ACUTE
            case 0xC267:
                return 0x01F5; // LATIN SMALL LETTER G WITH CEDILLA(4)
            case 0xC269:
                return 0x00ED; // LATIN SMALL LETTER I WITH ACUTE
            case 0xC26C:
                return 0x013A; // LATIN SMALL LETTER L WITH ACUTE
            case 0xC26E:
                return 0x0144; // LATIN SMALL LETTER N WITH ACUTE
            case 0xC26F:
                return 0x00F3; // LATIN SMALL LETTER O WITH ACUTE
            case 0xC272:
                return 0x0155; // LATIN SMALL LETTER R WITH ACUTE
            case 0xC273:
                return 0x015B; // LATIN SMALL LETTER S WITH ACUTE
            case 0xC275:
                return 0x00FA; // LATIN SMALL LETTER U WITH ACUTE
            case 0xC279:
                return 0x00FD; // LATIN SMALL LETTER Y WITH ACUTE
            case 0xC27A:
                return 0x017A; // LATIN SMALL LETTER Z WITH ACUTE

                // 12/03 non-spacing circumflex accent
            case 0xC341:
                return 0x00C2; // LATIN CAPITAL LETTER A WITH CIRCUMFLEX
            case 0xC343:
                return 0x0108; // LATIN CAPITAL LETTER C WITH CIRCUMFLEX
            case 0xC345:
                return 0x00CA; // LATIN CAPITAL LETTER E WITH CIRCUMFLEX
            case 0xC347:
                return 0x011C; // LATIN CAPITAL LETTER G WITH CIRCUMFLEX
            case 0xC348:
                return 0x0124; // LATIN CAPITAL LETTER H WITH CIRCUMFLEX
            case 0xC349:
                return 0x00CE; // LATIN CAPITAL LETTER I WITH CIRCUMFLEX
            case 0xC34A:
                return 0x0134; // LATIN CAPITAL LETTER J WITH CIRCUMFLEX
            case 0xC34F:
                return 0x00D4; // LATIN CAPITAL LETTER O WITH CIRCUMFLEX
            case 0xC353:
                return 0x015C; // LATIN CAPITAL LETTER S WITH CIRCUMFLEX
            case 0xC355:
                return 0x00DB; // LATIN CAPITAL LETTER U WITH CIRCUMFLEX
            case 0xC357:
                return 0x0174; // LATIN CAPITAL LETTER W WITH CIRCUMFLEX
            case 0xC359:
                return 0x0176; // LATIN CAPITAL LETTER Y WITH CIRCUMFLEX
            case 0xC361:
                return 0x00E2; // LATIN SMALL LETTER A WITH CIRCUMFLEX
            case 0xC363:
                return 0x0109; // LATIN SMALL LETTER C WITH CIRCUMFLEX
            case 0xC365:
                return 0x00EA; // LATIN SMALL LETTER E WITH CIRCUMFLEX
            case 0xC367:
                return 0x011D; // LATIN SMALL LETTER G WITH CIRCUMFLEX
            case 0xC368:
                return 0x0125; // LATIN SMALL LETTER H WITH CIRCUMFLEX
            case 0xC369:
                return 0x00EE; // LATIN SMALL LETTER I WITH CIRCUMFLEX
            case 0xC36A:
                return 0x0135; // LATIN SMALL LETTER J WITH CIRCUMFLEX
            case 0xC36F:
                return 0x00F4; // LATIN SMALL LETTER O WITH CIRCUMFLEX
            case 0xC373:
                return 0x015D; // LATIN SMALL LETTER S WITH CIRCUMFLEX
            case 0xC375:
                return 0x00FB; // LATIN SMALL LETTER U WITH CIRCUMFLEX
            case 0xC377:
                return 0x0175; // LATIN SMALL LETTER W WITH CIRCUMFLEX
            case 0xC379:
                return 0x0177; // LATIN SMALL LETTER Y WITH CIRCUMFLEX

                // 12/04 non-spacing tilde
            case 0xC441:
                return 0x00C3; // LATIN CAPITAL LETTER A WITH TILDE
            case 0xC449:
                return 0x0128; // LATIN CAPITAL LETTER I WITH TILDE
            case 0xC44E:
                return 0x00D1; // LATIN CAPITAL LETTER N WITH TILDE
            case 0xC44F:
                return 0x00D5; // LATIN CAPITAL LETTER O WITH TILDE
            case 0xC455:
                return 0x0168; // LATIN CAPITAL LETTER U WITH TILDE
            case 0xC461:
                return 0x00E3; // LATIN SMALL LETTER A WITH TILDE
            case 0xC469:
                return 0x0129; // LATIN SMALL LETTER I WITH TILDE
            case 0xC46E:
                return 0x00F1; // LATIN SMALL LETTER N WITH TILDE
            case 0xC46F:
                return 0x00F5; // LATIN SMALL LETTER O WITH TILDE
            case 0xC475:
                return 0x0169; // LATIN SMALL LETTER U WITH TILDE

                // 12/05 non-spacing macron
            case 0xC541:
                return 0x0100; // LATIN CAPITAL LETTER A WITH MACRON
            case 0xC545:
                return 0x0112; // LATIN CAPITAL LETTER E WITH MACRON
            case 0xC549:
                return 0x012A; // LATIN CAPITAL LETTER I WITH MACRON
            case 0xC54F:
                return 0x014C; // LATIN CAPITAL LETTER O WITH MACRON
            case 0xC555:
                return 0x016A; // LATIN CAPITAL LETTER U WITH MACRON
            case 0xC561:
                return 0x0101; // LATIN SMALL LETTER A WITH MACRON
            case 0xC565:
                return 0x0113; // LATIN SMALL LETTER E WITH MACRON
            case 0xC569:
                return 0x012B; // LATIN SMALL LETTER I WITH MACRON
            case 0xC56F:
                return 0x014D; // LATIN SMALL LETTER O WITH MACRON
            case 0xC575:
                return 0x016B; // LATIN SMALL LETTER U WITH MACRON

                // 12/06 non-spacing breve
            case 0xC620:
                return 0x02D8; // BREVE
            case 0xC641:
                return 0x0102; // LATIN CAPITAL LETTER A WITH BREVE
            case 0xC647:
                return 0x011E; // LATIN CAPITAL LETTER G WITH BREVE
            case 0xC655:
                return 0x016C; // LATIN CAPITAL LETTER U WITH BREVE
            case 0xC661:
                return 0x0103; // LATIN SMALL LETTER A WITH BREVE
            case 0xC667:
                return 0x011F; // LATIN SMALL LETTER G WITH BREVE
            case 0xC675:
                return 0x016D; // LATIN SMALL LETTER U WITH BREVE

                // 12/07 non-spacing dot above
            case 0xC743:
                return 0x010A; // LATIN CAPITAL LETTER C WITH DOT ABOVE
            case 0xC745:
                return 0x0116; // LATIN CAPITAL LETTER E WITH DOT ABOVE
            case 0xC747:
                return 0x0120; // LATIN CAPITAL LETTER G WITH DOT ABOVE
            case 0xC749:
                return 0x0130; // LATIN CAPITAL LETTER I WITH DOT ABOVE
            case 0xC75A:
                return 0x017B; // LATIN CAPITAL LETTER Z WITH DOT ABOVE
            case 0xC763:
                return 0x010B; // LATIN SMALL LETTER C WITH DOT ABOVE
            case 0xC765:
                return 0x0117; // LATIN SMALL LETTER E WITH DOT ABOVE
            case 0xC767:
                return 0x0121; // LATIN SMALL LETTER G WITH DOT ABOVE
            case 0xC77A:
                return 0x017C; // LATIN SMALL LETTER Z WITH DOT ABOVE

                // 12/08 non-spacing diaeresis
            case 0xC820:
                return 0x00A8; // DIAERESIS
            case 0xC841:
                return 0x00C4; // LATIN CAPITAL LETTER A WITH DIAERESIS
            case 0xC845:
                return 0x00CB; // LATIN CAPITAL LETTER E WITH DIAERESIS
            case 0xC849:
                return 0x00CF; // LATIN CAPITAL LETTER I WITH DIAERESIS
            case 0xC84F:
                return 0x00D6; // LATIN CAPITAL LETTER O WITH DIAERESIS
            case 0xC855:
                return 0x00DC; // LATIN CAPITAL LETTER U WITH DIAERESIS
            case 0xC859:
                return 0x0178; // LATIN CAPITAL LETTER Y WITH DIAERESIS
            case 0xC861:
                return 0x00E4; // LATIN SMALL LETTER A WITH DIAERESIS
            case 0xC865:
                return 0x00EB; // LATIN SMALL LETTER E WITH DIAERESIS
            case 0xC869:
                return 0x00EF; // LATIN SMALL LETTER I WITH DIAERESIS
            case 0xC86F:
                return 0x00F6; // LATIN SMALL LETTER O WITH DIAERESIS
            case 0xC875:
                return 0x00FC; // LATIN SMALL LETTER U WITH DIAERESIS
            case 0xC879:
                return 0x00FF; // LATIN SMALL LETTER Y WITH DIAERESIS

                // 12/09 (This position shall not be used)

                // 12/10 non-spacing ring above
            case 0xCA20:
                return 0x02DA; // RING ABOVE
            case 0xCA41:
                return 0x00C5; // LATIN CAPITAL LETTER A WITH RING ABOVE
            case 0xCAAD:
                return 0x016E; // LATIN CAPITAL LETTER U WITH RING ABOVE
            case 0xCA61:
                return 0x00E5; // LATIN SMALL LETTER A WITH RING ABOVE
            case 0xCA75:
                return 0x016F; // LATIN SMALL LETTER U WITH RING ABOVE

                // 12/11 non-spacing cedilla
            case 0xCB20:
                return 0x00B8; // CEDILLA
            case 0xCB43:
                return 0x00C7; // LATIN CAPITAL LETTER C WITH CEDILLA
            case 0xCB47:
                return 0x0122; // LATIN CAPITAL LETTER G WITH CEDILLA
            case 0xCB4B:
                return 0x0136; // LATIN CAPITAL LETTER K WITH CEDILLA
            case 0xCB4C:
                return 0x013B; // LATIN CAPITAL LETTER L WITH CEDILLA
            case 0xCB4E:
                return 0x0145; // LATIN CAPITAL LETTER N WITH CEDILLA
            case 0xCB52:
                return 0x0156; // LATIN CAPITAL LETTER R WITH CEDILLA
            case 0xCB53:
                return 0x015E; // LATIN CAPITAL LETTER S WITH CEDILLA
            case 0xCB54:
                return 0x0162; // LATIN CAPITAL LETTER T WITH CEDILLA
            case 0xCB63:
                return 0x00E7; // LATIN SMALL LETTER C WITH CEDILLA
                // case 0xCB67: return 0x0123; // small g with cedilla
            case 0xCB6B:
                return 0x0137; // LATIN SMALL LETTER K WITH CEDILLA
            case 0xCB6C:
                return 0x013C; // LATIN SMALL LETTER L WITH CEDILLA
            case 0xCB6E:
                return 0x0146; // LATIN SMALL LETTER N WITH CEDILLA
            case 0xCB72:
                return 0x0157; // LATIN SMALL LETTER R WITH CEDILLA
            case 0xCB73:
                return 0x015F; // LATIN SMALL LETTER S WITH CEDILLA
            case 0xCB74:
                return 0x0163; // LATIN SMALL LETTER T WITH CEDILLA

                // 12/12 (This position shall not be used)

                // 12/13 non-spacing double acute accent
            case 0xCD4F:
                return 0x0150; // LATIN CAPITAL LETTER O WITH DOUBLE ACUTE
            case 0xCD55:
                return 0x0170; // LATIN CAPITAL LETTER U WITH DOUBLE ACUTE
            case 0xCD6F:
                return 0x0151; // LATIN SMALL LETTER O WITH DOUBLE ACUTE
            case 0xCD75:
                return 0x0171; // LATIN SMALL LETTER U WITH DOUBLE ACUTE

                // 12/14 non-spacing ogonek
            case 0xCE20:
                return 0x02DB; // ogonek
            case 0xCE41:
                return 0x0104; // LATIN CAPITAL LETTER A WITH OGONEK
            case 0xCE45:
                return 0x0118; // LATIN CAPITAL LETTER E WITH OGONEK
            case 0xCE49:
                return 0x012E; // LATIN CAPITAL LETTER I WITH OGONEK
            case 0xCE55:
                return 0x0172; // LATIN CAPITAL LETTER U WITH OGONEK
            case 0xCE61:
                return 0x0105; // LATIN SMALL LETTER A WITH OGONEK
            case 0xCE65:
                return 0x0119; // LATIN SMALL LETTER E WITH OGONEK
            case 0xCE69:
                return 0x012F; // LATIN SMALL LETTER I WITH OGONEK
            case 0xCE75:
                return 0x0173; // LATIN SMALL LETTER U WITH OGONEK

                // 12/15 non-spacing caron
            case 0xCF20:
                return 0x02C7; // CARON
            case 0xCF43:
                return 0x010C; // LATIN CAPITAL LETTER C WITH CARON
            case 0xCF44:
                return 0x010E; // LATIN CAPITAL LETTER D WITH CARON
            case 0xCF45:
                return 0x011A; // LATIN CAPITAL LETTER E WITH CARON
            case 0xCF4C:
                return 0x013D; // LATIN CAPITAL LETTER L WITH CARON
            case 0xCF4E:
                return 0x0147; // LATIN CAPITAL LETTER N WITH CARON
            case 0xCF52:
                return 0x0158; // LATIN CAPITAL LETTER R WITH CARON
            case 0xCF53:
                return 0x0160; // LATIN CAPITAL LETTER S WITH CARON
            case 0xCF54:
                return 0x0164; // LATIN CAPITAL LETTER T WITH CARON
            case 0xCF5A:
                return 0x017D; // LATIN CAPITAL LETTER Z WITH CARON
            case 0xCF63:
                return 0x010D; // LATIN SMALL LETTER C WITH CARON
            case 0xCF64:
                return 0x010F; // LATIN SMALL LETTER D WITH CARON
            case 0xCF65:
                return 0x011B; // LATIN SMALL LETTER E WITH CARON
            case 0xCF6C:
                return 0x013E; // LATIN SMALL LETTER L WITH CARON
            case 0xCF6E:
                return 0x0148; // LATIN SMALL LETTER N WITH CARON
            case 0xCF72:
                return 0x0159; // LATIN SMALL LETTER R WITH CARON
            case 0xCF73:
                return 0x0161; // LATIN SMALL LETTER S WITH CARON
            case 0xCF74:
                return 0x0165; // LATIN SMALL LETTER T WITH CARON
            case 0xCF7A:
                return 0x017E; // LATIN SMALL LETTER Z WITH CARON

            default:
                return 0;
        }
    }
}