bundles/org.apache.jasper.glassfish/src/org/apache/jasper/xmlparser/UCSReader.java
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.isLoggable(Level.FINE))
                log.fine("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;
        }
    }
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.isLoggable(Level.FINE))
                log.fine("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.

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

@return     The character read, as an integer in the range 0 to 127
(<tt>0x00-0x7f</tt>), or -1 if the end of the stream has
been reached

@exception  IOException  If an I/O error occurs