Manual Pages  — KICONV

The kiconv_add_xlat16_cspair() function defines a conversion table using iconv(3) between fromcode charset and tocode charset. You can specify flag to determine if tolower(3) / toupper(3) conversion is included in the table. The flag has following values.

KICONV_LOWER KICONV_FROM_LOWER
	It generates a tolower table in addition to a character conversion table. The difference between two is tolower tocode or tolower fromcode.
KICONV_UPPER KICONV_FROM_UPPER
	It generates a toupper table in addition to a character conversion table. The difference between two is toupper tocode or toupper fromcode.

A tolower/toupper conversion is limited to single-byte characters.

The kiconv_add_xlat16_cspairs() function defines two conversion tables which are from localcode to foreigncode and from foreigncode to localcode. These conversion tables also contain both tolower and toupper tables.

The kiconv_add_xlat16_table() function defines a conversion table directly pointed by data whose length is datalen, not using iconv(3).