/* | |
* 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. | |
*/ | |
package org.apache.commons.codec.net; | |
import org.apache.commons.codec.DecoderException; | |
/** | |
* Utility methods for this package. | |
* | |
* @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a> | |
* @version $Id$ | |
* @since 1.4 | |
*/ | |
class Utils { | |
/** | |
* Returns the numeric value of the character <code>b</code> in radix 16. | |
* | |
* @param b | |
* The byte to be converted. | |
* @return The numeric value represented by the character in radix 16. | |
* | |
* @throws DecoderException | |
* Thrown when the byte is not valid per {@link Character#digit(char,int)} | |
*/ | |
static int digit16(byte b) throws DecoderException { | |
int i = Character.digit((char) b, 16); | |
if (i == -1) { | |
throw new DecoderException("Invalid URL encoding: not a valid digit (radix " + URLCodec.RADIX + "): " + b); | |
} | |
return i; | |
} | |
} |