示例#1
1
  // tokenizes a string for PBM and PGM headers and plain PBM and PGM data.  If oneChar is true,
  // then
  // rather than parsing a whole string, a single character is read (not including whitespace or
  // comments)
  static String tokenizeString(InputStream stream, boolean oneChar) throws IOException {
    final int EOF = -1;

    StringBuilder b = new StringBuilder();
    int c;
    boolean inComment = false;

    while (true) {
      c = stream.read();
      if (c == EOF)
        throw new IOException(
            "Stream ended prematurely, before table reading was completed."); // no more tokens
      else if (inComment) {
        if (c == '\r' || c == '\n') // escape the comment
        inComment = false;
        else {
        } // do nothing
      } else if (Character.isWhitespace((char) c)) {
      } // do nothing
      else if (c == '#') // start of a comment
      {
        inComment = true;
      } else // start of a string
      {
        b.append((char) c);
        break;
      }
    }

    if (oneChar) return b.toString();

    // at this point we have a valid string.  We read until whitespace or a #
    while (true) {
      c = stream.read();
      if (c == EOF) break;
      else if (c == '#') // start of comment, read until a '\n'
      {
        while (true) {
          c = stream.read(); // could hit EOF, which is fine
          if (c == EOF) break;
          else if (c == '\r' || c == '\n') break;
        }
        // break;   // comments are not delimiters
      } else if (Character.isWhitespace((char) c)) break;
      else b.append((char) c);
    }
    return b.toString();
  }
示例#2
0
  private boolean checkHandlerWorkaround(
      String elementName, String handlerName, boolean writeHandler)
      throws ClickException, IOException {
    // If talking to an old ControlSocket, try the "handlers" handler
    // instead.
    String s = readString(elementName, "handlers");
    int pos = 0;

    // Find handler with same name.
    while (true) {
      pos = s.indexOf(handlerName, pos);
      if (pos < 0) // no such handler
      return false;
      if ((pos == 0 || s.charAt(pos - 1) == '\n')
          && Character.isWhitespace(s.charAt(pos + handlerName.length()))) break;
      pos++;
    }

    // we have a matching handler: will it be read/write suitable?
    char wantType = (writeHandler ? 'w' : 'r');
    for (pos += handlerName.length();
        pos < s.length() && Character.isWhitespace(s.charAt(pos));
        pos++) /* nada */ ;
    for (; pos < s.length(); pos++) {
      char c = s.charAt(pos);
      if (Character.toLowerCase(c) == wantType) return true;
      else if (Character.isWhitespace(c)) break;
    }
    return false;
  }
示例#3
0
  /**
   * Gets the information about an element's handlers in the current router configuration.
   *
   * @param el The element name.
   * @return Vector of HandlerInfo structures.
   * @exception NoSuchElementException If there is no such element in the current configuration.
   * @exception HandlerErrorException If the handler returned an error.
   * @exception PermissionDeniedException If the router would not let us access the handler.
   * @exception IOException If there was some other error accessing the handler (e.g., there was a
   *     stream or socket error, the ControlSocket returned an unknwon unknown error code, or the
   *     response could otherwise not be understood).
   * @see #HandlerInfo
   * @see #getConfigElementNames
   * @see #getRouterConfig
   * @see #getRouterFlatConfig
   */
  public Vector getElementHandlers(String elementName) throws ClickException, IOException {
    Vector v = new Vector();
    Vector vh;

    try {
      char[] buf = read(elementName, "handlers");
      vh = StringUtils.split(buf, 0, '\n');
    } catch (ClickException.NoSuchHandlerException e) {
      return v;
    }

    for (int i = 0; i < vh.size(); i++) {
      String s = (String) vh.elementAt(i);
      int j;
      for (j = 0; j < s.length() && !Character.isWhitespace(s.charAt(j)); j++)
        ; // find record split
      if (j == s.length())
        throw new ClickException.HandlerFormatException(elementName + ".handlers");
      HandlerInfo hi = new HandlerInfo(elementName, s.substring(0, j).trim());
      while (j < s.length() && Character.isWhitespace(s.charAt(j))) j++;
      for (; j < s.length(); j++) {
        char c = s.charAt(j);
        if (Character.toLowerCase(c) == 'r') hi.canRead = true;
        else if (Character.toLowerCase(c) == 'w') hi.canWrite = true;
        else if (Character.isWhitespace(c)) break;
      }
      v.addElement(hi);
    }
    return v;
  }
示例#4
0
 /**
  * Skips any leading whitespace and return true if any was found. Note that this does not refill
  * the buffer, so callers should do something like this: while(ring.skipLeadingWhiteSpace()) {
  * refill ring; }
  *
  * @return true if any leading whitespace was found, false otherwise
  */
 public boolean skipLeadingWhiteSpace() {
   if (Character.isWhitespace(get(0))) {
     int idx = 0;
     do {
       idx++;
     } while (idx < size() && Character.isWhitespace(get(idx)));
     skip(idx);
     return true;
   }
   return false;
 }
  private void write(CharSequence text, boolean gsp) {
    if (!gsp) {
      out.print(text);
      return;
    }

    for (int ix = 0, ixz = text.length(); ix < ixz; ix++) {
      char c = text.charAt(ix);
      String rep = null;
      if (Character.isWhitespace(c)) {
        for (ix++; ix < ixz; ix++) {
          if (Character.isWhitespace(text.charAt(ix))) {
            continue;
          }
          ix--;
          rep = " ";
          break;
        }
      } else if (c == '&') {
        if (match("&semi;", text, ix)) {
          rep = ";";
          ix += 5;
        } else if (match("&amp;", text, ix)) {
          rep = "&";
          ix += 4;
        } else if (match("&lt;", text, ix)) {
          rep = "<";
          ix += 3;
        } else if (match("&gt;", text, ix)) {
          rep = ">";
          ix += 3;
        }
      } else if (c == '<') {
        if (match("<br>", text, ix) || match("<hr>", text, ix)) {
          rep = "\n";
          // incrementLineNumber();
          ix += 3;
        } else {
          int end = match(PARA_BREAK, text, ix);
          if (end <= 0) end = match(ROW_BREAK, text, ix);
          if (end > 0) {
            rep = "\n";
            // incrementLineNumber();
            ix = end;
          }
        }
      }
      if (rep != null) {
        out.print(rep);
      } else {
        out.print(c);
      }
    }
  }
示例#6
0
 public static String[] splitwords(String text) {
   ArrayList<String> words = new ArrayList<String>();
   StringBuilder buf = new StringBuilder();
   String st = "ws";
   int i = 0;
   while (i < text.length()) {
     char c = text.charAt(i);
     if (st == "ws") {
       if (!Character.isWhitespace(c)) st = "word";
       else i++;
     } else if (st == "word") {
       if (c == '"') {
         st = "quote";
         i++;
       } else if (c == '\\') {
         st = "squote";
         i++;
       } else if (Character.isWhitespace(c)) {
         words.add(buf.toString());
         buf = new StringBuilder();
         st = "ws";
       } else {
         buf.append(c);
         i++;
       }
     } else if (st == "quote") {
       if (c == '"') {
         st = "word";
         i++;
       } else if (c == '\\') {
         st = "sqquote";
         i++;
       } else {
         buf.append(c);
         i++;
       }
     } else if (st == "squote") {
       buf.append(c);
       i++;
       st = "word";
     } else if (st == "sqquote") {
       buf.append(c);
       i++;
       st = "quote";
     }
   }
   if (st == "word") words.add(buf.toString());
   if ((st != "ws") && (st != "word")) return (null);
   return (words.toArray(new String[0]));
 }
  /**
   * Called to parse a double or single quote string.
   *
   * @return The string parsed.
   * @throws IOException If an I/O exception occurs.
   */
  protected String parseString() throws IOException {
    StringBuilder result = new StringBuilder();
    eatWhitespace();
    if ("\"\'".indexOf(this.source.peek()) != -1) {
      int delim = this.source.read();
      while ((this.source.peek() != delim) && (this.source.peek() != -1)) {
        if (result.length() > 1000) {
          break;
        }
        int ch = parseSpecialCharacter();
        if ((ch == 13) || (ch == 10)) {
          continue;
        }
        result.append((char) ch);
      }
      if ("\"\'".indexOf(this.source.peek()) != -1) {
        this.source.read();
      }
    } else {
      while (!Character.isWhitespace(this.source.peek())
          && (this.source.peek() != -1)
          && (this.source.peek() != '>')) {
        result.append(parseSpecialCharacter());
      }
    }

    return result.toString();
  }
 /**
  * @ensures: if input file is read, a String is filled with words from file and searched in
  *     dictionary list, and if found increase words found counter, otherwise increase words not
  *     found. Otherwise error reading file
  */
 public void readFileOliver() {
   try {
     FileInputStream inf = new FileInputStream(new File("oliver.txt"));
     char let;
     String str = "";
     String key = "";
     int n = 0;
     while ((n = inf.read()) != -1) {
       let = (char) n;
       if (Character.isLetter(let)) {
         str += Character.toLowerCase(let);
       }
       if ((Character.isWhitespace(let) || let == '-') && !str.isEmpty()) {
         key = str;
         str = "";
         boolean a = dictionary[(int) key.charAt(0) - 97].contains(key);
         if (a == true) {
           counter = dictionary[(int) key.charAt(0) - 97].indexOf(key);
           counterWFound++;
           counterWFCompared += counter;
         } else {
           counter =
               dictionary[(int) key.charAt(0) - 97].indexOf(
                   dictionary[(int) key.charAt(0) - 97].getLast());
           counterWNotFound++;
           counterWNFCompared += counter;
         }
       }
     }
     inf.close();
   } catch (IOException e) {
     e.printStackTrace();
   }
 }
示例#9
0
    // get a list of whitespace separated classnames from a property.
    private String[] parseClassNames(String propertyName) {
	String hands = getProperty(propertyName);
	if (hands == null) {
	    return new String[0];
	}
	hands = hands.trim();
	int ix = 0;
	Vector result = new Vector();
	while (ix < hands.length()) {
	    int end = ix;
	    while (end < hands.length()) {
		if (Character.isWhitespace(hands.charAt(end))) {
		    break;
		}
		if (hands.charAt(end) == ',') {
		    break;
		}
		end++;
	    }
	    String word = hands.substring(ix, end);
	    ix = end+1;
	    word = word.trim();
	    if (word.length() == 0) {
		continue;
	    }
	    result.add(word);
	}
	return (String[]) result.toArray(new String[result.size()]);
    }
示例#10
0
  String cleanupSource(String source) {
    if (source.isEmpty()) {
      return source.concat("\n");
    }

    int lastChIdx = source.length() - 1;
    if (source.charAt(lastChIdx) != '\n') {
      // Append a newline at the end
      source = source.concat("\n");
    } else {
      // Remove all newlines at the end but one
      while (lastChIdx >= 1) {
        Character ch1 = source.charAt(lastChIdx);
        if (ch1 == '\n' || Character.isWhitespace(ch1)) {
          source = source.substring(0, lastChIdx--);
        } else {
          break;
        }
      }

      source = source.concat("\n");
    }

    return source;
  }
 /* pre : empty args
  * post: compare input text file to dictionary
  */
 public void spellCheck() {
   try {
     FileInputStream inf = new FileInputStream(new File("oliver.txt"));
     char let;
     String word = ""; // word to be processed
     int n = 0;
     while ((n = inf.read()) != -1) {
       let = (char) n;
       if (Character.isLetter(let)) {
         word += Character.toLowerCase(let);
       }
       if ((Character.isWhitespace(let) || let == '-') && !word.isEmpty()) {
         // if(dictionary[(int)wordstr.charAt(0)-97].search(wordstr))
         if (dictionary[(int) word.charAt(0) - 97].search(word, stringComparisons)) {
           foundWords++;
           wordsFoundComparison += stringComparisons[0];
         } else {
           notFoundWords++;
           wordsNotFoundComparison += stringComparisons[0];
         }
         word = "";
       }
     }
     inf.close();
   } catch (IOException e) {
     e.printStackTrace();
   }
 } // end of spellCheck
示例#12
0
 /** Skips any white space, returning the character after the white space. */
 private int readWS() throws IOException {
   int nextChar;
   while ((nextChar = readChar()) != -1 && Character.isWhitespace((char) nextChar)) {
     readWS = true;
   }
   return nextChar;
 }
示例#13
0
 /**
  * Skips over any whitespace characters, except for end-of-lines. After this method is called, the
  * next input character is either an end-of-line, an end-of-file, or a non-whitespace character.
  * This method never causes an error. (Ordinarily, end-of-file is not possible when reading from
  * standard input.)
  */
 public static void skipBlanks() {
   char ch = lookChar();
   while (ch != EOF && ch != '\n' && Character.isWhitespace(ch)) {
     readChar();
     ch = lookChar();
   }
 }
示例#14
0
 String[] getArgNames(JNIMethod method) {
   int n_args = method.getParameters().size();
   if (n_args == 0) return new String[0];
   String name = method.getName();
   String params = "";
   int index = 0;
   while (true) {
     index = classSource.indexOf(name, index + 1);
     if (!Character.isWhitespace(classSource.charAt(index - 1))) continue;
     if (index == -1) return null;
     int parantesesStart = classSource.indexOf("(", index);
     if (classSource.substring(index + name.length(), parantesesStart).trim().length() == 0) {
       int parantesesEnd = classSource.indexOf(")", parantesesStart);
       params = classSource.substring(parantesesStart + 1, parantesesEnd);
       break;
     }
   }
   String[] names = new String[n_args];
   StringTokenizer tk = new StringTokenizer(params, ",");
   for (int i = 0; i < names.length; i++) {
     String s = tk.nextToken().trim();
     StringTokenizer tk1 = new StringTokenizer(s, " ");
     String s1 = null;
     while (tk1.hasMoreTokens()) {
       s1 = tk1.nextToken();
     }
     names[i] = s1.trim();
   }
   return names;
 }
  /**
   * Parse any special characters(i.e. &nbsp);
   *
   * @return The character that was parsed.
   * @throws IOException If a read error occurs
   */
  private char parseSpecialCharacter() throws IOException {
    char result = (char) this.source.read();
    int advanceBy = 0;

    // is there a special character?
    if (result == '&') {
      int ch = 0;
      StringBuilder buffer = new StringBuilder();

      // loop through and read special character
      do {
        ch = this.source.peek(advanceBy++);
        if ((ch != '&') && (ch != ';') && !Character.isWhitespace(ch)) {
          buffer.append((char) ch);
        }

      } while ((ch != ';') && (ch != -1) && !Character.isWhitespace(ch));

      String b = buffer.toString().trim().toLowerCase();

      // did we find a special character?
      if (b.length() > 0) {
        if (b.charAt(0) == '#') {
          try {
            result = (char) Integer.parseInt(b.substring(1));
          } catch (NumberFormatException e) {
            advanceBy = 0;
          }
        } else {
          if (charMap.containsKey(b)) {
            result = charMap.get(b);
          } else {
            advanceBy = 0;
          }
        }
      } else {
        advanceBy = 0;
      }
    }

    while (advanceBy > 0) {
      read();
      advanceBy--;
    }

    return result;
  }
示例#16
0
  /** 解析属性行 */
  private static boolean parserAttribute(String line) {
    // @attribute sex {Female,Male}
    // @attribute capital-gain numeric
    if (line == null) {
      return true;
    }

    int index = 0; // 字符串的当前位置。
    // 跳过"@attribute"
    index += "@attribute".length();

    // 跳过空白。
    while (Character.isWhitespace(line.charAt(index))) ++index;

    // 遇到了属性的名字
    String name;
    int nameStart = index; // 名字开始的位置。
    while (!Character.isWhitespace(line.charAt(index))) ++index;
    // 此时index直向属性名字后面的空格。
    name = line.substring(nameStart, index);

    // 下面解析属性值。
    // 跳过空白。
    while (Character.isWhitespace(line.charAt(index))) ++index;
    if (line.charAt(index) == '{') { // 是categorical类型属性
      // @attribute sex {Female,Male}
      AttributeClass ac = new AttributeClass(AttributeType.CATE, name);

      String cateName;
      int cateStart;
      while (line.charAt(index) != '}') {
        ++index;
        cateStart = index;
        while (line.charAt(index) != ',' && line.charAt(index) != '}') {
          ++index;
        }
        cateName = line.substring(cateStart, index);
        ac.addCate(cateName);
      }
      arff.addAttrClass(ac);
    } else { // 是numeric类型属性
      arff.addAttrClass(new AttributeClass(AttributeType.NUME, name));
    }

    return true;
  }
  // Here is where the real work of reading the phonetics file is done.
  private void buildRule(String str, Vector ruleList) {
    if (str.length() < 1) return;
    for (int i = 0; i < IGNORED_KEYWORDS.length; i++) {
      if (str.startsWith(IGNORED_KEYWORDS[i])) return;
    }

    // A different alphabet is used for this language, will be read into
    // the alphabetString variable.
    if (str.startsWith(KEYWORD_ALPHBET)) {
      int start = str.indexOf(ALPHABET_START);
      int end = str.lastIndexOf(ALPHABET_END);
      if (end != -1 && start != -1) {
        alphabetString = str.substring(++start, end).toCharArray();
      }
      return;
    }

    // str contains two groups of characters separated by white space(s).
    // The fisrt group is the "match expression". The second group is the
    // "replacement expression" giving the phonetic equivalent of the
    // "match expression".
    TransformationRule rule = null;
    StringBuffer matchExp = new StringBuffer();
    StringBuffer replaceExp = new StringBuffer();
    boolean start = false, end = false;
    int takeOutPart = 0, matchLength = 0;
    boolean match = true, inMulti = false;
    for (int i = 0; i < str.length(); i++) {
      if (Character.isWhitespace(str.charAt(i))) {
        match = false;
      } else {
        if (match) {
          if (!isReservedChar(str.charAt(i))) {
            matchExp.append(str.charAt(i));
            if (!inMulti) {
              takeOutPart++;
              matchLength++;
            }
            if (str.charAt(i) == STARTMULTI || str.charAt(i) == ENDMULTI) inMulti = !inMulti;
          }
          if (str.charAt(i) == '-') takeOutPart--;
          if (str.charAt(i) == '^') start = true;
          if (str.charAt(i) == '$') end = true;
        } else {
          replaceExp.append(str.charAt(i));
        }
      }
    }
    if (replaceExp.toString().equals(REPLACEVOID)) {
      replaceExp = new StringBuffer("");
      // System.out.println("Changing _ to \"\" for "+matchExp.toString());
    }
    rule =
        new TransformationRule(
            matchExp.toString(), replaceExp.toString(), takeOutPart, matchLength, start, end);
    // System.out.println(rule.toString());
    ruleList.addElement(rule);
  }
示例#18
0
 private static boolean hasWhitespace(String string) {
   int length = string.length();
   for (int i = 0; i < length; i++) {
     if (Character.isWhitespace(string.charAt(i))) {
       return true;
     }
   }
   return false;
 }
示例#19
0
  private static int getChar()

        // Returns the next non-whitespace character on the input stream.
        // Returns -1, end-of-stream, if the end of the input stream is reached.

      {
    int i = getNextChar();
    while (Character.isWhitespace((char) i)) i = getNextChar();
    return i;
  } // end getChar
示例#20
0
 /**
  * Skips whitespace characters and then reads one "word" from input. Any additional characters on
  * the current line of input are retained, and will be read by the next input operation. A word is
  * defined as a sequence of non-whitespace characters (not just letters!). When using standard IO,
  * this will not produce an error. In other cases, an IllegalArgumentException will be thrown if
  * an end-of-file is encountered.
  */
 public static String getWord() {
   skipWhitespace();
   StringBuffer str = new StringBuffer(50);
   char ch = lookChar();
   while (ch == EOF || !Character.isWhitespace(ch)) {
     str.append(readChar());
     ch = lookChar();
   }
   return str.toString();
 }
  /**
   * Check to see if the ending tag is present.
   *
   * @param name The type of end tag being saught.
   * @return True if the ending tag was found.
   * @throws IOException Thrown if an IO error occurs.
   */
  private boolean peekEndTag(String name) throws IOException {
    int i = 0;

    // pass any whitespace
    while ((this.source.peek(i) != -1) && Character.isWhitespace(this.source.peek(i))) {
      i++;
    }

    // is a tag beginning
    if (this.source.peek(i) != '<') {
      return false;
    } else {
      i++;
    }

    // pass any whitespace
    while ((this.source.peek(i) != -1) && Character.isWhitespace(this.source.peek(i))) {
      i++;
    }

    // is it an end tag
    if (this.source.peek(i) != '/') {
      return false;
    } else {
      i++;
    }

    // pass any whitespace
    while ((this.source.peek(i) != -1) && Character.isWhitespace(this.source.peek(i))) {
      i++;
    }

    // does the name match
    for (int j = 0; j < name.length(); j++) {
      if (Character.toLowerCase(this.source.peek(i)) != Character.toLowerCase(name.charAt(j))) {
        return false;
      }
      i++;
    }

    return true;
  }
示例#22
0
 /**
  * Skips over any whitespace characters, including for end-of-lines. After this method is called,
  * the next input character is either an end-of-file or a non-whitespace character. This method
  * never causes an error. (Ordinarily, end-of-file is not possible when reading from standard
  * input.)
  */
 private static void skipWhitespace() {
   char ch = lookChar();
   while (ch != EOF && Character.isWhitespace(ch)) {
     readChar();
     if (ch == '\n' && readingStandardInput && writingStandardOutput) {
       out.print("? ");
       out.flush();
     }
     ch = lookChar();
   }
 }
示例#23
0
文件: Master.java 项目: lemmy/dnsjava
 private static String stripTrailing(String s) {
   if (s == null) return null;
   int lastChar;
   int semi;
   if ((semi = s.lastIndexOf(';')) < 0) lastChar = s.length() - 1;
   else lastChar = semi - 1;
   for (int i = lastChar; i >= 0; i--) {
     if (!Character.isWhitespace(s.charAt(i))) return s.substring(0, i + 1);
   }
   return "";
 }
    boolean skipSpaces() {
      int _c;

      do {
        _c = getNext();
        if (_c == Integer.MIN_VALUE) {
          return false;
        }
      } while (Character.isWhitespace((char) _c));

      this.idx--;

      return true;
    }
  /**
   * Create a Map with the frequency of each symbol that appears in the string.
   *
   * @param text - string from which to generate the map
   */
  public Map<Character, Double> getSymbolFrequencyMap() {
    Map<Character, Double> letterFrequency = new TreeMap<Character, Double>();
    Double freq = new Double(0);
    Character textCharacter;
    for (int i = 0; i < text.length(); i++) {
      textCharacter = new Character(text.charAt(i));
      if (!Character.isWhitespace(textCharacter)) {
        freq = (letterFrequency.get(textCharacter));
        letterFrequency.put(textCharacter, (freq == null) ? 1 : freq + 1);
      }
    }
    normalizeSymbolMap(letterFrequency);

    return letterFrequency;
  }
示例#26
0
  /** Converts all whitespace characters in a String to space characters (\u0020). */
  public static String cleanWhitespace(String str) {
    int length = str.length();

    StringBuffer buf = new StringBuffer(length);
    for (int i = 0; i < length; i++) {
      char c = str.charAt(i);
      if (Character.isWhitespace(c)) {
        buf.append(' ');
      } else {
        buf.append(c);
      }
    }

    return buf.toString();
  }
示例#27
0
 private void skipWhiteSpace() throws ParseException, IOException {
   int currentChar = -1;
   do {
     try {
       currentChar = input.read();
     } catch (IOException e) {
       throw new ParseException(0);
     }
   } while (Character.isWhitespace((char) currentChar));
   try {
     input.unread(currentChar);
   } catch (IOException e2) {
     throw new ParseException(0);
   }
   return;
 }
示例#28
0
  /**
   * This is the write() method of the stream. All Writer subclasses implement this. All other
   * versions of write() are variants of this one
   */
  public void write(char[] buffer, int index, int len) {
    synchronized (this.lock) {
      // Loop through all the characters passed to us
      for (int i = index; i < index + len; i++) {
        // If we haven't begun a page (or a new page), do that now.
        if (page == null) newpage();

        // If the character is a line terminator, then begin new line,
        // unless it is a \n immediately after a \r.
        if (buffer[i] == '\n') {
          if (!last_char_was_return) newline();
          continue;
        }
        if (buffer[i] == '\r') {
          newline();
          last_char_was_return = true;
          continue;
        } else last_char_was_return = false;

        // If it some other non-printing character, ignore it.
        if (Character.isWhitespace(buffer[i])
            && !Character.isSpaceChar(buffer[i])
            && (buffer[i] != '\t')) continue;

        // If no more characters will fit on the line, start a new line.
        if (charnum >= chars_per_line) {
          newline();
          if (page == null) newpage(); // and start a new page, if necessary
        }

        // Now print the character:
        // If it is a space, skip one space, without output.
        // If it is a tab, skip the necessary number of spaces.
        // Otherwise, print the character.
        // It is inefficient to draw only one character at a time, but
        // because our FontMetrics don't match up exactly to what the
        // printer uses we need to position each character individually.
        if (Character.isSpaceChar(buffer[i])) charnum++;
        else if (buffer[i] == '\t') charnum += 8 - (charnum % 8);
        else {
          page.drawChars(
              buffer, i, 1, x0 + charnum * charwidth, y0 + (linenum * lineheight) + lineascent);
          charnum++;
        }
      }
    }
  }
  /**
   * Parse an attribute name, if one is present.
   *
   * @throws IOException If an I/O exception occurs.
   */
  protected String parseAttributeName() throws IOException {
    eatWhitespace();

    if ("\"\'".indexOf(this.source.peek()) == -1) {
      StringBuilder buffer = new StringBuilder();
      while (!Character.isWhitespace(this.source.peek())
          && (this.source.peek() != '=')
          && (this.source.peek() != '>')
          && (this.source.peek() != -1)) {
        int ch = parseSpecialCharacter();
        buffer.append((char) ch);
      }
      return buffer.toString();
    } else {
      return (parseString());
    }
  }
    boolean readIdentifier() {
      int _c;
      int _start_idx = this.idx;

      do {
        _c = getNext();
        // abort on incomplete string
        if (_c == Integer.MIN_VALUE) {
          return false;
        }
      } while (!Character.isWhitespace((char) _c));

      this.idx--;
      this.lastIdentifier = new byte[this.idx - _start_idx];
      System.arraycopy(this.buffer, _start_idx, this.lastIdentifier, 0, this.idx - _start_idx);

      return true;
    }