unicodebuildervalue.java

RESIN 3.2 最新源码

  @Override
  public CharSequence subSequence(int start, int end)
  {
    if (end <= start)
      return EMPTY;
    
    char []newBuffer = new char[end - start];
    
    System.arraycopy(_buffer, start, newBuffer, 0, end - start);
		     
    return new UnicodeBuilderValue(newBuffer, 0, end - start);
  }

  //
  // java.lang.String
  //

  /**
   * Convert to lower case.
   */
  @Override
  public StringValue toLowerCase()
  {
    int length = _length;
    
    UnicodeBuilderValue string = new UnicodeBuilderValue(length);
    
    char []srcBuffer = _buffer;
    char []dstBuffer = string._buffer;

    for (int i = 0; i < length; i++) {
      char ch = srcBuffer[i];
      
      if ('A' <= ch && ch <= 'Z')
	dstBuffer[i] = (char) (ch + 'a' - 'A');
      else if (ch < 0x80)
	dstBuffer[i] = ch;
      else if (Character.isUpperCase(ch))
	dstBuffer[i] = Character.toLowerCase(ch);
      else
	dstBuffer[i] = ch;
    }

    string._length = length;

    return string;
  }
  
  /**
   * Convert to lower case.
   */
  @Override
  public StringValue toUpperCase()
  {
    int length = _length;
    
    UnicodeBuilderValue string = new UnicodeBuilderValue(_length);

    char []srcBuffer = _buffer;
    char []dstBuffer = string._buffer;

    for (int i = 0; i < length; i++) {
      char ch = srcBuffer[i];
      
      if ('a' <= ch && ch <= 'z')
        dstBuffer[i] = (char) (ch + 'A' - 'a');
      else if (ch < 0x80)
	dstBuffer[i] = ch;
      else if (Character.isLowerCase(ch))
        dstBuffer[i] = Character.toUpperCase(ch);
      else
	dstBuffer[i] = ch;
    }

    string._length = length;

    return string;
  }

  /**
   * Returns a character array
   */
  @Override
  public char []toCharArray()
  { 
    char[] dest = new char[_length];
    
    System.arraycopy(_buffer, 0, dest, 0, _length);
    
    return dest;
  }

  public char []getRawCharArray()
  {
    return _buffer;
  }
  
  /**
   * Returns the buffer backing this StringBuilderValue.
   */
  public char []getBuffer()
  {
    return _buffer;
  }

  /**
   * Prints the value.
   * @param env
   */
  public void print(Env env)
  {
    env.print(_buffer, 0, _length);
  }

  /**
   * Serializes the value.
   */
  public void serialize(StringBuilder sb)
  {
    sb.append("U:");
    sb.append(_length);
    sb.append(":\"");
    sb.append(_buffer, 0, _length);
    sb.append("\";");
  }

  //
  // append code
  //

  /**
   * Creates a string builder of the same type.
   */
  @Override
  public StringValue createStringBuilder()
  {
    return new UnicodeBuilderValue();
  }

  /**
   * Creates a string builder of the same type.
   */
  @Override
  public StringValue createStringBuilder(int length)
  {
    return new UnicodeBuilderValue(length);
  }

  /**
   * Converts to a string builder
   */
  @Override
  public StringValue toStringBuilder(Env env)
  {
    return new UnicodeBuilderValue(_buffer, 0, _length);
  }
  @Override
  public String toDebugString()
  {
    StringBuilder sb = new StringBuilder();

    int length = length();

    sb.append("unicode(");
    sb.append(length);
    sb.append(") \"");

    int appendLength = length > 256 ? 256 : length;

    for (int i = 0; i < appendLength; i++)
      sb.append(charAt(i));

    if (length > 256)
      sb.append(" ...");

    sb.append('"');

    return sb.toString();
  }

  @Override
  public void varDumpImpl(Env env,
                          WriteStream out,
                          int depth,
                          IdentityHashMap<Value, String> valueSet)
    throws IOException
  {
    int length = length();

    if (length < 0)
        length = 0;
    
    out.print("unicode(");
    out.print(length);
    out.print(") \"");

    for (int i = 0; i < length; i++)
      out.print(charAt(i));

    out.print("\"");
  }

  //
  // java.lang.Object methods
  //

  //
  // Java generator code
  //

  /**
   * Generates code to recreate the expression.
   *
   * @param out the writer to the Java source code.
   */
  public void generate(PrintWriter out)
    throws IOException
  {
    out.print("new UnicodeBuilderValue(\"");
    printJavaString(out, this);
    out.print("\")");
  }

  private void copyOnWrite()
  {
    if (_isCopy) {
      _isCopy = false;
      char []buffer = new char[_buffer.length];
      System.arraycopy(_buffer, 0, buffer, 0, _length);
      _buffer = buffer;
    }
  }

  //
  // static helper functions
  //

  public static int getNumericType(char []buffer, int offset, int len)
  {
    if (len == 0)
      return IS_STRING;

    int i = offset;
    int ch = 0;
    boolean hasPoint = false;

    if (i < len && ((ch = buffer[i]) == '+' || ch == '-')) {
      i++;
    }

    if (len <= i)
      return IS_STRING;

    ch = buffer[i];

    if (ch == '.') {
      for (i++; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
        return IS_DOUBLE;
      }

      return IS_STRING;
    }
    else if (! ('0' <= ch && ch <= '9'))
      return IS_STRING;

    for (; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
    }

    if (len <= i)
      return IS_LONG;
    else if (ch == '.' || ch == 'e' || ch == 'E') {
      for (i++;
           i < len && ('0' <= (ch = buffer[i]) && ch <= '9' ||
                       ch == '+' || ch == '-' || ch == 'e' || ch == 'E');
           i++) {
      }

      if (i < len)
        return IS_STRING;
      else
        return IS_DOUBLE;
    }
    else
      return IS_STRING;
  }

  public static ValueType getValueType(char []buffer, int offset, int len)
  {
    if (len == 0) {
      // php/0307
      return ValueType.LONG_ADD;
    }

    int i = offset;
    int ch = 0;
    boolean hasPoint = false;

    if (i < len && ((ch = buffer[i]) == '+' || ch == '-')) {
      i++;
    }

    if (len <= i)
      return ValueType.STRING;

    ch = buffer[i];

    if (ch == '.') {
      for (i++; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
        return ValueType.DOUBLE_CMP;
      }

      return ValueType.STRING;
    }
    else if (! ('0' <= ch && ch <= '9'))
      return ValueType.STRING;

    for (; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
    }

    if (len <= i)
      return ValueType.LONG_EQ;
    else if (ch == '.' || ch == 'e' || ch == 'E') {
      for (i++;
           i < len && ('0' <= (ch = buffer[i]) && ch <= '9' ||
                       ch == '+' || ch == '-' || ch == 'e' || ch == 'E');
           i++) {
      }

      if (i < len)
        return ValueType.STRING;
      else
        return ValueType.DOUBLE_CMP;
    }
    else
      return ValueType.STRING;
  }

  /**
   * Converts to a long.
   */
  public static long toLong(char []buffer, int offset, int len)
  {
    return parseLong(buffer, offset, len);
  }

  public static double toDouble(char []buffer, int offset, int len)
  {
    int i = offset;
    int ch = 0;

    if (i < len && ((ch = buffer[i]) == '+' || ch == '-')) {
      i++;
    }

    for (; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
    }

    if (ch == '.') {
      for (i++; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
      }

      if (i == 1)
	return 0;
    }

    if (ch == 'e' || ch == 'E') {
      int e = i++;

      if (i < len && (ch = buffer[i]) == '+' || ch == '-') {
        i++;
      }

      for (; i < len && '0' <= (ch = buffer[i]) && ch <= '9'; i++) {
      }

      if (i == e + 1)
        i = e;
    }

    if (i == 0)
      return 0;

    try {
      return Double.parseDouble(new String(buffer, 0, i));
    } catch (NumberFormatException e) {
      return 0;
    }
  }

  static {
    CHAR_STRINGS = new UnicodeBuilderValue[256];

    for (int i = 0; i < CHAR_STRINGS.length; i++)
      CHAR_STRINGS[i] = new UnicodeBuilderValue((char) i);
  }
}