Quadcap Embeddable Database

com/quadcap/util/text/OctetMap.java

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package com.quadcap.util.text;

/* Copyright 1997 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

/**
 * Simple byte membership tables for 8-bit text.
 *
 * @author Stan Bailes
 */
public class OctetMap {
    boolean[]                   isValid         = new boolean[256];

    public static OctetMap      tokenChars;
    public static OctetMap      uriChars;
    public static OctetMap      numberChars;
    public static OctetMap      fieldValueChars;
    public static OctetMap      wsChars;
    public static OctetMap      crlfChars;

    public static OctetMap      dquoteChar      = new OctetMap('"');

    static {
        tokenChars = new OctetMap(32, 126);
        tokenChars.exclude("()<>@,;:\\\"/[]?={}         ");

        uriChars = new OctetMap(0, 255);
        uriChars.exclude("?     \r\n");

        numberChars = new OctetMap('0', '9');
        numberChars.include('.', '.');

        fieldValueChars = new OctetMap(32, 126);

        wsChars = new OctetMap(' ');
        wsChars.include('\t');

        crlfChars = new OctetMap('\r');
        crlfChars.include('\n');
    }
    
    public OctetMap(int c) {
        include(c);
    }

    public OctetMap(int start, int end) {
        include(start, end);
    }

    public OctetMap(String s) {
        include(s);
    }

    public void include(int start, int end) {
        for (int i = start; i <= end; i++) isValid[i] = true;
    }

    public void include(int c) {
        isValid[c] = true;
    }

    public void exclude(int start, int end) {
        for (int i = start; i <= end; i++) isValid[i] = false;
    }

    public void exclude(String s) {
        for (int i = 0; i < s.length(); i++) {
            isValid[(byte)s.charAt(i)] = false;
        }
    }

    public void include(String s) {
        for (int i = 0; i < s.length(); i++) {
            isValid[(byte)s.charAt(i)] = true;
        }
    }

    public boolean has(int b) { return isValid[b & 0xff]; }
}