| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket.common.util; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.eclipse.jetty.util.BufferUtil; |
| |
| public final class Hex |
| { |
| private static final char[] hexcodes = "0123456789ABCDEF".toCharArray(); |
| |
| public static byte[] asByteArray(String hstr) |
| { |
| if ((hstr.length() < 0) || ((hstr.length() % 2) != 0)) |
| { |
| throw new IllegalArgumentException(String.format("Invalid string length of <%d>",hstr.length())); |
| } |
| |
| int size = hstr.length() / 2; |
| byte buf[] = new byte[size]; |
| byte hex; |
| int len = hstr.length(); |
| |
| int idx = (int)Math.floor(((size * 2) - (double)len) / 2); |
| for (int i = 0; i < len; i++) |
| { |
| hex = 0; |
| if (i >= 0) |
| { |
| hex = (byte)(Character.digit(hstr.charAt(i),16) << 4); |
| } |
| i++; |
| hex += (byte)(Character.digit(hstr.charAt(i),16)); |
| |
| buf[idx] = hex; |
| idx++; |
| } |
| |
| return buf; |
| } |
| |
| public static ByteBuffer asByteBuffer(String hstr) |
| { |
| return ByteBuffer.wrap(asByteArray(hstr)); |
| } |
| |
| public static String asHex(byte buf[]) |
| { |
| int len = buf.length; |
| char out[] = new char[len * 2]; |
| for (int i = 0; i < len; i++) |
| { |
| out[i * 2] = hexcodes[(buf[i] & 0xF0) >> 4]; |
| out[(i * 2) + 1] = hexcodes[(buf[i] & 0x0F)]; |
| } |
| return String.valueOf(out); |
| } |
| |
| public static String asHex(ByteBuffer buffer) |
| { |
| return asHex(BufferUtil.toArray(buffer)); |
| } |
| } |