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1 /* Reattore HTTP Server 2 3 Copyright (C) 2002 Michael Hope <michaelh@juju.net.nz> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 19 $Id: CharUtil.java,v 1.3 2003/03/03 05:14:39 michaelh Exp $ 20 */ 21 package juju.reattore.util; 22 23 24 /*** Shared character utility methods. 25 */ 26 public class CharUtil { 27 private static final int[] NIBBLES = new int[256]; 28 29 static { 30 for (int i = 0; i < 10; i++) { 31 NIBBLES['0' + i] = i; 32 } 33 34 for (int i = 10; i < 16; i++) { 35 NIBBLES[('a' + i) - 10] = i; 36 NIBBLES[('A' + i) - 10] = i; 37 } 38 } 39 40 /*** Turns the given character into it's hex value using the HTTP 41 HEX rules. Basically 0-9, a-f, A-F. 42 43 @param val A character 44 @return It's nibble value, or 0 on invalid. 45 */ 46 public static final int fromNibble(int val) { 47 return NIBBLES[val]; 48 } 49 }

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