bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/SimpleCharStream.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005 BEA Systems and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     BEA Systems - initial implementation
  *
  *******************************************************************************/
 /* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 3.0 */
 package org.eclipse.jst.jsp.core.internal.java.jspel;

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

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

   protected int column = 0;
   protected int line = 1;

   protected boolean prevCharIsCR = false;
   protected boolean prevCharIsLF = false;

   protected java.io.Reader inputStream;

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

   protected 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;
   }

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

      return c;
   }

   protected 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 char readChar() throws java.io.IOException
   {
      if (inBuf > 0)
      {
         --inBuf;

         if (++bufpos == bufsize)
            bufpos = 0;

         return buffer[bufpos];
      }

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

      char c = buffer[bufpos];

      UpdateLineColumn(c);
      return (c);
   }

   /**
    * @deprecated
    * @see #getEndColumn
    */

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

   /**
    * @deprecated
    * @see #getEndLine
    */

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

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

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

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

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

   public void backup(int amount) {

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

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

   public SimpleCharStream(java.io.Reader dstream)
   {
      this(dstream, 1, 1, 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 void ReInit(java.io.Reader dstream)
   {
      ReInit(dstream, 1, 1, 4096);
   }
   public SimpleCharStream(java.io.InputStream dstream, int startline,
   int startcolumn, int buffersize)
   {
      this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
   }

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

   public SimpleCharStream(java.io.InputStream dstream)
   {
      this(dstream, 1, 1, 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)
   {
      ReInit(dstream, 1, 1, 4096);
   }
   public void ReInit(java.io.InputStream dstream, int startline,
                                                            int startcolumn)
   {
      ReInit(dstream, startline, startcolumn, 4096);
   }
   public 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 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];
   }

 }
	/*******************************************************************************
	* Copyright (c) 2005 BEA Systems and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* BEA Systems - initial implementation
	*
	*******************************************************************************/
	/* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 3.0 */
	package org.eclipse.jst.jsp.core.internal.java.jspel;

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

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

	protected int column = 0;
	protected int line = 1;

	protected boolean prevCharIsCR = false;
	protected boolean prevCharIsLF = false;

	protected java.io.Reader inputStream;

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

	protected 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;
	}

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

	return c;
	}

	protected 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 char readChar() throws java.io.IOException
	{
	if (inBuf > 0)
	{
	--inBuf;

	if (++bufpos == bufsize)
	bufpos = 0;

	return buffer[bufpos];
	}

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

	char c = buffer[bufpos];

	UpdateLineColumn(c);
	return (c);
	}

	/**
	* @deprecated
	* @see #getEndColumn
	*/

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

	/**
	* @deprecated
	* @see #getEndLine
	*/

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

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

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

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

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

	public void backup(int amount) {

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

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

	public SimpleCharStream(java.io.Reader dstream)
	{
	this(dstream, 1, 1, 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 void ReInit(java.io.Reader dstream)
	{
	ReInit(dstream, 1, 1, 4096);
	}
	public SimpleCharStream(java.io.InputStream dstream, int startline,
	int startcolumn, int buffersize)
	{
	this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
	}

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

	public SimpleCharStream(java.io.InputStream dstream)
	{
	this(dstream, 1, 1, 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)
	{
	ReInit(dstream, 1, 1, 4096);
	}
	public void ReInit(java.io.InputStream dstream, int startline,
	int startcolumn)
	{
	ReInit(dstream, startline, startcolumn, 4096);
	}
	public 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 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];
	}

	}