UCS-2 and UTF-8 conversion

Hello everyone,


I am writing a pure C/C++ program to convert from UCS-2 to UTF-8 character string. I can not find enough information from Google -- the mapping tables (formula) between UCS-2 and UTF-8.

I want to develop the program through pure bit operations (&, | and shifting), and I do not want to invoking any OS specific APIs.

Any reference samples or the mapping tables (formula) between UCS-2 and UTF-8?


thanks in advance,
George

Maybe you could look in the source code of ICU (IBM's open source library for Unicode).

http://en.wikipedia.org/wiki/UCS-2
http://en.wikipedia.org/wiki/Utf-8

Wikipedia has good enough info. I've written Unicode converters with it's help.

BTW why write a converter isn't the free libraries cover that functionality.