/* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 4.0 */package org.apache.lucene.demo.html;/** * 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 int tabSize = 8;  protected void setTabSize(int i) { tabSize = i; }  protected int getTabSize(int i) { return tabSize; }  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 += (tabSize - (column % tabSize));           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, String encoding, int startline,  int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException  {     this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);  }  public SimpleCharStream(java.io.InputStream dstream, int startline,  int startcolumn, int buffersize)  {     this(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);  }  public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline,                          int startcolumn) throws java.io.UnsupportedEncodingException  {     this(dstream, encoding, startline, startcolumn, 4096);  }  public SimpleCharStream(java.io.InputStream dstream, int startline,                          int startcolumn)  {     this(dstream, startline, startcolumn, 4096);  }  public SimpleCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException  {     this(dstream, encoding, 1, 1, 4096);  }  public SimpleCharStream(java.io.InputStream dstream)  {     this(dstream, 1, 1, 4096);  }  public void ReInit(java.io.InputStream dstream, String encoding, int startline,                          int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException  {     ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);  }  public void ReInit(java.io.InputStream dstream, int startline,                          int startcolumn, int buffersize)  {     ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);  }  public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException  {     ReInit(dstream, encoding, 1, 1, 4096);  }  public void ReInit(java.io.InputStream dstream)  {     ReInit(dstream, 1, 1, 4096);  }  public void ReInit(java.io.InputStream dstream, String encoding, int startline,                     int startcolumn) throws java.io.UnsupportedEncodingException  {     ReInit(dstream, encoding, startline, startcolumn, 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];  }}