- /*
- * 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
- *
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.util;
-
- /**
- * A helper class to create hex-encoded representations of numbers.
- */
- public final class HexEncoder {
-
- private HexEncoder() { }
-
- /**
- * Returns an hex encoding of the given number as a string of the given length,
- * left-padded with zeros if necessary.
- *
- * @param n a number
- * @param width required length of the string
- * @return an hex-encoded representation of the number
- */
- public static String encode(int n, int width) {
- char[] digits = new char[width];
- for (int i = width - 1; i >= 0; i--) {
- int digit = n & 0xF;
- digits[i] = (char) (digit < 10 ? '0' + digit : 'A' + digit - 10);
- n >>= 4;
- }
- return new String(digits);
- }
-
- /**
- * Returns an hex encoding of the given character as:
- * <ul>
- * <li>4-character string in case of non-BMP character</li>
- * <li>6-character string in case of BMP character</li>
- * </ul>
- *
- * @param c a character
- * @return an hex-encoded representation of the character
- */
- public static String encode(int c) {
- if (CharUtilities.isBmpCodePoint(c)) {
- return encode(c, 4);
- } else {
- return encode(c, 6);
- }
- }
- }
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