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/*
 * Copyright (C) 2016-2023 Objectos Software LTDA.
 *
 * Licensed 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
 *
 * http://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 objectos.way;

final class Bytes {

  public static final byte HTAB = '\t';

  public static final byte LF = '\n';

  public static final byte CR = '\r';

  public static final byte SP = ' ';

  public static final byte COLON = ':';

  public static final byte QUESTION_MARK = '?';

  public static final byte SOLIDUS = '/';

  public static final byte DIGIT_0 = '0';

  public static final byte DIGIT_9 = '9';

  public static final byte[] CRLF = {CR, LF};

  public static final byte[] COLONSP = {COLON, SP};

  private Bytes() {}

  public static boolean isOptionalWhitespace(byte value) {
    return switch (value) {
      case SP, HTAB -> true;

      default -> false;
    };
  }

  public static byte toLowerCase(byte ch) {
    if (ch >= 'A' && ch <= 'Z') {
      return (byte) (ch ^ 0x20);
    }

    return ch;
  }

}