KICONV_TC_EUCTW_MBYTE
isplane1 = (*ib == KICONV_TC_EUCTW_MBYTE) ?
isplane1 = (*ib == KICONV_TC_EUCTW_MBYTE) ?
*ob++ = KICONV_TC_EUCTW_MBYTE;
((v) == KICONV_TC_EUCTW_MBYTE || KICONV_IS_VALID_EUC_BYTE(v))