/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.commons.csv;

/**
 * Private constants for this package.
 */
final class Constants {

    static final char BACKSLASH = '\\';

    static final char BACKSPACE = '\b';

    static final String COMMA = ",";

    /**
     * Starts a comment, the remainder of the line is the comment.
     */
    static final char COMMENT = '#';

    static final char CR = '\r';

    /** RFC 4180 defines line breaks as CRLF. */
    static final String CRLF = "\r\n";

    static final Character DOUBLE_QUOTE_CHAR = Character.valueOf('"');  // Explicit (un)boxing is intentional.

    static final String EMPTY = "";

    static final String[] EMPTY_STRING_ARRAY = {};

    static final char FF = '\f';

    static final char LF = '\n';

    /**
     * Unicode line separator.
     */
    static final String LINE_SEPARATOR = "\u2028";

    /**
     * Unicode next line.
     */
    static final String NEXT_LINE = "\u0085";

    /**
     * Unicode paragraph separator.
     */
    static final String PARAGRAPH_SEPARATOR = "\u2029";

    static final char PIPE = '|';

    /** ASCII record separator. */
    static final char RS = 30;

    static final char SP = ' ';

    static final String SQL_NULL_STRING = "\\N";

    static final char TAB = '\t';

    /** Undefined state for the lookahead char. */
    static final int UNDEFINED = -2;

    /** ASCII unit separator. */
    static final char US = 31;

    /** No instances. */
    private Constants() {
        // noop
    }

}
