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переделать ircd


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имеется irc сервер, вот часть кода проверяющая корректен ли никнейм

s_user.c
------------------------------------------------------
/*
* 'do_nick_name' ensures that the given parameter (nick) is really a proper
* string for a nickname (note, the 'nick' may be modified in the process...)
*
* RETURNS the length of the final NICKNAME (0, if nickname is invalid)
*
* Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
* anything outside the above set will terminate nickname.
* In addition, the first character cannot be '-' or a Digit.
*
* Note:
* The '~'-character should be allowed, but a change should be global,
* some confusion would result if only few servers allowed it...
*/

static int do_nick_name(char *nick)
{
Reg1 char *ch;

if (*nick == '-' || isDigit(*nick)) /* first character in [0..9-] */
return 0;

for (ch = nick; *ch && (ch - nick) < NICKLEN; ch++)
if (!isIrcNk(*ch))
break;

*ch = '\0';

return (ch - nick);
}
------------------------------------------------------
isIrcNk на сколько я понимаю таблица допустимых символов

про него упомянается только в common.h

#define NTL_IRCNK 0x1000 /* Nick names charset, aka isvalid() */
.
.
.
#define isIrcNk(c) (NTL_char_attrib[(c)-CHAR_MIN] & NTL_IRCNK)

про NTL_char_attrib упомянается в common.c
-------------------------------------------------------

const unsigned int NTL_char_attrib[] = {
#if (CHAR_MIN<0)
/* x80-x87 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x88-x8f */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x90-x97 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x98-x9f */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xa0-xa7 */ 0x0000, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xa8-xaf */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xb0-xb7 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xb8-xbf */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xc0-xc7 */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00,
/* xc8-xcf */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00,
/* xd0-xd7 */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x0400,
/* xd8-xdf */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x0400,
/* xe0-xe7 */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400,
/* xe8-xef */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400,
/* xf0-xf7 */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x0400,
/* xf8-xff */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x0400
,

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#endif /* (CHAR_MIN<0) */
/* x00-x07 */ 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0004,
/* x08-x0f */ 0x0404, 0x0504, 0x10504, 0x0504, 0x0504, 0x10504, 0x0404, 0x0404,
/* x10-x17 */ 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404,
/* x18-x1f */ 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404, 0x0404,
/* ' '-x27 */ 0x0140, 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x24d0,
/* '('-'/' */ 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x00d0, 0x74d0, 0xe4d0, 0x04d0,
/* '0'-'7' */ 0xf459, 0xf459, 0xf459, 0xf459, 0xf459, 0xf459, 0xf459, 0xf459,
/* '8'-'?' */ 0xf459, 0xf459, 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x04d0, 0x04d0,
/* '@'-'G' */ 0x04d0, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653,
/* 'H'-'O' */ 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653,
/* 'P'-'W' */ 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653,
/* 'X'-'_' */ 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x7653, 0x74d0,
/* '`'-'g' */ 0x34d0, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473,
/* 'h'-'o' */ 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473,
/* 'p'-'w' */ 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473,
/* 'x'-x7f */ 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x7473, 0x0400
#if (!(CHAR_MIN<0))
,
/* x80-x87 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x88-x8f */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x90-x97 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* x98-x9f */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xa0-xa7 */ 0x0000, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xa8-xaf */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xb0-xb7 */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xb8-xbf */ 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400, 0x0400,
/* xc0-xc7 */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00,
/* xc8-xcf */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00,
/* xd0-xd7 */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x0400,
/* xd8-xdf */ 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x2c00, 0x0400,
/* xe0-xe7 */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400,
/* xe8-xef */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400,
/* xf0-xf7 */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x0400,
/* xf8-xff */ 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x2400, 0x0400
#endif /* (!(CHAR_MIN<0)) */
};
-------------------------------------------------------
ВОПРОС:
как сделать чтоб русские большие и маленькие буквы (в кодировке ср1251) тоже были допустимы?

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