Code review request: 7071311 Decoder enhancement

[Zhengyu Gu]

Hi,

This is a refactoring and enhancement of current decoder. The primary 
goal is to make it thread-safe, so it can be used by other than just 
error handler. It also addressed CR 7067266 
(http://monaco.sfbay.sun.com/detail.jsf?cr=7067266).

CR 7071311: http://monaco.sfbay.sun.com/detail.jsf?cr=7071311
Webrev: http://cr.openjdk.java.net/~zgu/7071311/webrev.00/

The changes have been tested on Win32, Linux 32 and Solaris.

Thanks,

-Zhengyu