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Byte based encoding support library for java
There is a newer version: 1.0.58
/*
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.jcodings;

import org.jcodings.ascii.AsciiTables;
import org.jcodings.constants.PosixBracket;
import org.jcodings.exception.CharacterPropertyException;
import org.jcodings.exception.ErrorMessages;

abstract class AbstractEncoding extends Encoding {

    private final short CTypeTable[];

    protected AbstractEncoding(String name, int minLength, int maxLength, short[]CTypeTable) {
        super(name, minLength, maxLength);
        this.CTypeTable = CTypeTable;
    }

    /** CTYPE_TO_BIT
     */
    private static int CTypeToBit(int ctype) {
        return 1 << ctype;
    }

    /** ONIGENC_IS_XXXXXX_CODE_CTYPE
     */
    protected final boolean isCodeCTypeInternal(int code, int ctype) {
        return (CTypeTable[code] & CTypeToBit(ctype)) != 0;
    }

    /** onigenc_is_mbc_newline_0x0a / used also by multibyte encodings
     *
     */
    @Override
    public boolean isNewLine(byte[]bytes, int p, int end) {
        return p < end ? bytes[p] == (byte)0x0a : false;
    }

    protected final int asciiMbcCaseFold(int flag, byte[]bytes, IntHolder pp, int end, byte[]lower) {
        lower[0] = AsciiTables.ToLowerCaseTable[bytes[pp.value] & 0xff];
        pp.value++;
        return 1;
    }

    /** onigenc_ascii_mbc_case_fold
     */
    @Override
    public int mbcCaseFold(int flag, byte[]bytes, IntHolder pp, int end, byte[]lower) {
        return asciiMbcCaseFold(flag, bytes, pp, end, lower);
    }

    protected final void asciiApplyAllCaseFold(int flag, ApplyAllCaseFoldFunction fun, Object arg) {
        int[]code = new int[]{0};

        for (int i=0; i