public UCSReader(InputStream inputStream,
    short encoding) 
{
    //
    // Constructors
    //
        this(inputStream, DEFAULT_BUFFER_SIZE, encoding);
}

Constructs an ASCII reader from the specified input stream using the default buffer size. The Endian-ness and whether this is UCS-2 or UCS-4 needs also to be known in advance.

Parameters:

inputStream - The input stream.

encoding - One of UCS2LE, UCS2BE, UCS4LE or UCS4BE.

 public UCSReader(InputStream inputStream,
    int size,
    short encoding) 
{
        fInputStream = inputStream;
        fBuffer = new byte[size];
        fEncoding = encoding;
}

Constructs an ASCII reader from the specified input stream and buffer size. The Endian-ness and whether this is UCS-2 or UCS-4 needs also to be known in advance.

Parameters:

inputStream - The input stream.

size - The initial buffer size.

encoding - One of UCS2LE, UCS2BE, UCS4LE or UCS4BE.

 public  void close() throws IOException 
{
         fInputStream.close();
}

Close the stream. Once a stream has been closed, further read(), ready(), mark(), or reset() invocations will throw an IOException. Closing a previously-closed stream, however, has no effect.

 public  void mark(int readAheadLimit) throws IOException 
{
	fInputStream.mark(readAheadLimit);
}

Mark the present position in the stream. Subsequent calls to reset() will attempt to reposition the stream to this point. Not all character-input streams support the mark() operation.

 public boolean markSupported() 
{
	return fInputStream.markSupported();
}

Tell whether this stream supports the mark() operation.

 public int read() throws IOException 
{
 
        int b0 = fInputStream.read() & 0xff;
        if (b0 == 0xff)
            return -1;
        int b1 = fInputStream.read() & 0xff;
        if (b1 == 0xff)
            return -1;
        if(fEncoding  >=4) {
            int b2 = fInputStream.read() & 0xff;
            if (b2 == 0xff)
                return -1;
            int b3 = fInputStream.read() & 0xff;
            if (b3 == 0xff)
                return -1;
            if (log.isDebugEnabled())
                log.debug("b0 is " + (b0 & 0xff) + " b1 " + (b1 & 0xff) + " b2 " + (b2 & 0xff) + " b3 " + (b3 & 0xff));
            if (fEncoding == UCS4BE)
                return (b0< < 24)+(b1< < 16)+(b2< < 8)+b3;
            else
                return (b3< < 24)+(b2< < 16)+(b1< < 8)+b0;
        } else { // UCS-2
            if (fEncoding == UCS2BE)
                return (b0< < 8)+b1;
            else
                return (b1< < 8)+b0;
        }
}

Read a single character. This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.

Subclasses that intend to support efficient single-character input should override this method.

 public int read(char[] ch,
    int offset,
    int length) throws IOException 
{
        int byteLength = length < <  ((fEncoding  >= 4)?2:1);
        if (byteLength  > fBuffer.length) {
            byteLength = fBuffer.length;
        }
        int count = fInputStream.read(fBuffer, 0, byteLength);
        if(count == -1) return -1;
        // try and make count be a multiple of the number of bytes we're looking for
        if(fEncoding  >= 4) { // BigEndian
            // this looks ugly, but it avoids an if at any rate...
            int numToRead = (4 - (count & 3) & 3);
            for(int i=0; i< numToRead; i++) {
                int charRead = fInputStream.read();
                if(charRead == -1) { // end of input; something likely went wrong!A  Pad buffer with nulls.
                    for (int j = i;j< numToRead; j++)
                        fBuffer[count+j] = 0;
                    break;
                } else {
                    fBuffer[count+i] = (byte)charRead; 
                }
            }
            count += numToRead;
        } else {
            int numToRead = count & 1;
            if(numToRead != 0) {
                count++;
                int charRead = fInputStream.read();
                if(charRead == -1) { // end of input; something likely went wrong!A  Pad buffer with nulls.
                    fBuffer[count] = 0;
                } else {
                    fBuffer[count] = (byte)charRead;
                }
            }
        }
        // now count is a multiple of the right number of bytes
        int numChars = count  > > ((fEncoding  >= 4)?2:1);
        int curPos = 0;
        for (int i = 0; i <  numChars; i++) {
            int b0 = fBuffer[curPos++] & 0xff;
            int b1 = fBuffer[curPos++] & 0xff;
            if(fEncoding  >=4) {
                int b2 = fBuffer[curPos++] & 0xff;
                int b3 = fBuffer[curPos++] & 0xff;
                if (fEncoding == UCS4BE)
                    ch[offset+i] = (char)((b0< < 24)+(b1< < 16)+(b2< < 8)+b3);
                else
                    ch[offset+i] = (char)((b3< < 24)+(b2< < 16)+(b1< < 8)+b0);
            } else { // UCS-2
                if (fEncoding == UCS2BE)
                    ch[offset+i] = (char)((b0< < 8)+b1);
                else
                    ch[offset+i] = (char)((b1< < 8)+b0);
            }
        }
        return numChars;
}

Read characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.

 public boolean ready() throws IOException 
{
	return false;
}

Tell whether this stream is ready to be read.

 public  void reset() throws IOException 
{
        fInputStream.reset();
}

Reset the stream. If the stream has been marked, then attempt to reposition it at the mark. If the stream has not been marked, then attempt to reset it in some way appropriate to the particular stream, for example by repositioning it to its starting point. Not all character-input streams support the reset() operation, and some support reset() without supporting mark().

 public long skip(long n) throws IOException 
{
        // charWidth will represent the number of bits to move
        // n leftward to get num of bytes to skip, and then move the result rightward
        // to get num of chars effectively skipped.
        // The trick with &'ing, as with elsewhere in this dcode, is
        // intended to avoid an expensive use of / that might not be optimized
        // away.
        int charWidth = (fEncoding  >=4)?2:1;
        long bytesSkipped = fInputStream.skip(n< < charWidth);
        if((bytesSkipped & (charWidth | 1)) == 0) return bytesSkipped  > > charWidth;
        return (bytesSkipped  > > charWidth) + 1;
}

Skip characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.