/* * Oscar - An implementation of the OSGi framework. * Copyright (c) 2004, Richard S. Hall * All rights reserved. *   * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: *   *   * Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. *   * Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in *     the documentation and/or other materials provided with the *     distribution. *   * Neither the name of the ungoverned.org nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. *   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * Contact: Richard S. Hall (heavy@ungoverned.org) * Contributor(s): * Dennis Heimbigner ***/package org.ungoverned.oscar.ldap;import java.io.IOException;import java.io.Reader;public class LdapLexer {    static final int EOF = -1;    static final int NOCHAR = 0; // signal no peeked char; different from EOF    public static final String WHITESPACE = " \t\n\r";    Reader reader = null;    int nextChar = NOCHAR; // last peeked character    public LdapLexer() {}    public LdapLexer(Reader r)    {    setReader(r);    charno = 1;    }    public void setReader(Reader r)    {    reader = r;    }    /*    The procedures get(),peek(),skipwhitespace(),getnw(), and peeknw()    provide the essential LdapLexer interface.    */    public int get() throws IOException // any next char    {    if(nextChar == NOCHAR) return readChar();    int c = nextChar;    nextChar = NOCHAR;    return c;    }    public int peek() throws IOException    {    if(nextChar == NOCHAR) {        nextChar = readChar();    }    return nextChar;    }    void skipwhitespace() throws IOException    {    while(WHITESPACE.indexOf(peek()) >= 0) get();    }    public int getnw() throws IOException // next non-whitespace char    {					   // (note: not essential but useful)    skipwhitespace();    return get();    }    public int peeknw() throws IOException // next non-whitespace char    {					   // (note: not essential but useful)    skipwhitespace();    return peek();    }    // Following is for error reporting    // Pass all character reads thru this so we can track char count    int charno; // 1-based    public int charno() {return charno;}    int readChar() throws IOException    {    charno++;    return reader.read();    }}