[HACKERS] How to extend server side encoding GBK

[Xiong He]

I just noticed that PG not support the following encoding: 
        /* followings are for client encoding only */
        PG_SJIS,                                        /* Shift JIS 
(Winindows-932) */
        PG_BIG5,                                        /* Big5 (Windows-950) */
        PG_GBK,                                         /* GBK (Windows-936) */
        PG_UHC,                                         /* UHC (Windows-949) */
        PG_GB18030,                                     /* GB18030 */
        PG_JOHAB,                                       /* EUC for Korean JOHAB 
*/
        PG_SHIFT_JIS_2004,                      /* Shift-JIS-2004 */
        _PG_LAST_ENCODING_                      /* mark only */



But  PG_GBK and PG_GB18030 are very popular in Chinese charset.
Could anybody give some hints about how to extend it in PG source code?


Although UTF-8 and PG_EUC_CN is ready.  But I think it's useful to implement 
the support of PG_GBK.


Any help is appreciated. Thanks in advance.