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	/*
	* Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/* Generated By:JavaCC: Do not edit this line. ASCII_CharStream.java Version 0.7pre6 */
	package com.sun.jmx.snmp.IPAcl;

	/**
	* An implementation of interface CharStream, where the stream is assumed to
	* contain only ASCII characters (without unicode processing).
	*/

	final class ASCII_CharStream
	{
	public static final boolean staticFlag = false;
	int bufsize;
	int available;
	int tokenBegin;
	public int bufpos = -1;
	private int bufline[];
	private int bufcolumn[];

	private int column = 0;
	private int line = 1;

	private boolean prevCharIsCR = false;
	private boolean prevCharIsLF = false;

	private java.io.Reader inputStream;

	private char[] buffer;
	private int maxNextCharInd = 0;
	private int inBuf = 0;

	private final void ExpandBuff(boolean wrapAround)
	{
	char[] newbuffer = new char[bufsize + 2048];
	int newbufline[] = new int[bufsize + 2048];
	int newbufcolumn[] = new int[bufsize + 2048];

	try
	{
	if (wrapAround)
	{
	System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
	System.arraycopy(buffer, 0, newbuffer,
	bufsize - tokenBegin, bufpos);
	buffer = newbuffer;

	System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
	System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
	bufline = newbufline;

	System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
	System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
	bufcolumn = newbufcolumn;

	maxNextCharInd = (bufpos += (bufsize - tokenBegin));
	}
	else
	{
	System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
	buffer = newbuffer;

	System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
	bufline = newbufline;

	System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
	bufcolumn = newbufcolumn;

	maxNextCharInd = (bufpos -= tokenBegin);
	}
	}
	catch (Throwable t)
	{
	throw new Error(t.getMessage());
	}


	bufsize += 2048;
	available = bufsize;
	tokenBegin = 0;
	}

	private final void FillBuff() throws java.io.IOException
	{
	if (maxNextCharInd == available)
	{
	if (available == bufsize)
	{
	if (tokenBegin > 2048)
	{
	bufpos = maxNextCharInd = 0;
	available = tokenBegin;
	}
	else if (tokenBegin < 0)
	bufpos = maxNextCharInd = 0;
	else
	ExpandBuff(false);
	}
	else if (available > tokenBegin)
	available = bufsize;
	else if ((tokenBegin - available) < 2048)
	ExpandBuff(true);
	else
	available = tokenBegin;
	}

	int i;
	try {
	if ((i = inputStream.read(buffer, maxNextCharInd,
	available - maxNextCharInd)) == -1)
	{
	inputStream.close();
	throw new java.io.IOException();
	}
	else
	maxNextCharInd += i;
	return;
	}
	catch(java.io.IOException e) {
	--bufpos;
	backup(0);
	if (tokenBegin == -1)
	tokenBegin = bufpos;
	throw e;
	}
	}

	public final char BeginToken() throws java.io.IOException
	{
	tokenBegin = -1;
	char c = readChar();
	tokenBegin = bufpos;

	return c;
	}

	private final void UpdateLineColumn(char c)
	{
	column++;

	if (prevCharIsLF)
	{
	prevCharIsLF = false;
	line += (column = 1);
	}
	else if (prevCharIsCR)
	{
	prevCharIsCR = false;
	if (c == '\n')
	{
	prevCharIsLF = true;
	}
	else
	line += (column = 1);
	}

	switch (c)
	{
	case '\r' :
	prevCharIsCR = true;
	break;
	case '\n' :
	prevCharIsLF = true;
	break;
	case '\t' :
	column--;
	column += (8 - (column & 07));
	break;
	default :
	break;
	}

	bufline[bufpos] = line;
	bufcolumn[bufpos] = column;
	}

	public final char readChar() throws java.io.IOException
	{
	if (inBuf > 0)
	{
	--inBuf;
	return (char)((char)0xff & buffer[(bufpos == bufsize - 1) ? (bufpos = 0) : ++bufpos]);
	}

	if (++bufpos >= maxNextCharInd)
	FillBuff();

	char c = (char)((char)0xff & buffer[bufpos]);

	UpdateLineColumn(c);
	return (c);
	}

	/**
	* @deprecated
	* @see #getEndColumn
	*/
	@Deprecated
	public final int getColumn() {
	return bufcolumn[bufpos];
	}

	/**
	* @deprecated
	* @see #getEndLine
	*/
	@Deprecated
	public final int getLine() {
	return bufline[bufpos];
	}

	public final int getEndColumn() {
	return bufcolumn[bufpos];
	}

	public final int getEndLine() {
	return bufline[bufpos];
	}

	public final int getBeginColumn() {
	return bufcolumn[tokenBegin];
	}

	public final int getBeginLine() {
	return bufline[tokenBegin];
	}

	public final void backup(int amount) {

	inBuf += amount;
	if ((bufpos -= amount) < 0)
	bufpos += bufsize;
	}

	public ASCII_CharStream(java.io.Reader dstream, int startline,
	int startcolumn, int buffersize)
	{
	inputStream = dstream;
	line = startline;
	column = startcolumn - 1;

	available = bufsize = buffersize;
	buffer = new char[buffersize];
	bufline = new int[buffersize];
	bufcolumn = new int[buffersize];
	}

	public ASCII_CharStream(java.io.Reader dstream, int startline,
	int startcolumn)
	{
	this(dstream, startline, startcolumn, 4096);
	}
	public void ReInit(java.io.Reader dstream, int startline,
	int startcolumn, int buffersize)
	{
	inputStream = dstream;
	line = startline;
	column = startcolumn - 1;

	if (buffer == null \|\| buffersize != buffer.length)
	{
	available = bufsize = buffersize;
	buffer = new char[buffersize];
	bufline = new int[buffersize];
	bufcolumn = new int[buffersize];
	}
	prevCharIsLF = prevCharIsCR = false;
	tokenBegin = inBuf = maxNextCharInd = 0;
	bufpos = -1;
	}

	public void ReInit(java.io.Reader dstream, int startline,
	int startcolumn)
	{
	ReInit(dstream, startline, startcolumn, 4096);
	}
	public ASCII_CharStream(java.io.InputStream dstream, int startline,
	int startcolumn, int buffersize)
	{
	this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
	}

	public ASCII_CharStream(java.io.InputStream dstream, int startline,
	int startcolumn)
	{
	this(dstream, startline, startcolumn, 4096);
	}

	public void ReInit(java.io.InputStream dstream, int startline,
	int startcolumn, int buffersize)
	{
	ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
	}
	public void ReInit(java.io.InputStream dstream, int startline,
	int startcolumn)
	{
	ReInit(dstream, startline, startcolumn, 4096);
	}
	public final String GetImage()
	{
	if (bufpos >= tokenBegin)
	return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
	else
	return new String(buffer, tokenBegin, bufsize - tokenBegin) +
	new String(buffer, 0, bufpos + 1);
	}

	public final char[] GetSuffix(int len)
	{
	char[] ret = new char[len];

	if ((bufpos + 1) >= len)
	System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
	else
	{
	System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
	len - bufpos - 1);
	System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
	}

	return ret;
	}

	public void Done()
	{
	buffer = null;
	bufline = null;
	bufcolumn = null;
	}

	/**
	* Method to adjust line and column numbers for the start of a token.
	*/
	public void adjustBeginLineColumn(int newLine, int newCol)
	{
	int start = tokenBegin;
	int len;

	if (bufpos >= tokenBegin)
	{
	len = bufpos - tokenBegin + inBuf + 1;
	}
	else
	{
	len = bufsize - tokenBegin + bufpos + 1 + inBuf;
	}

	int i = 0, j = 0, k = 0;
	int nextColDiff = 0, columnDiff = 0;

	while (i < len &&
	bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
	{
	bufline[j] = newLine;
	nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
	bufcolumn[j] = newCol + columnDiff;
	columnDiff = nextColDiff;
	i++;
	}

	if (i < len)
	{
	bufline[j] = newLine++;
	bufcolumn[j] = newCol + columnDiff;

	while (i++ < len)
	{
	if (bufline[j = start % bufsize] != bufline[++start % bufsize])
	bufline[j] = newLine++;
	else
	bufline[j] = newLine;
	}
	}

	line = bufline[j];
	column = bufcolumn[j];
	}

	}

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