function allocates a conversion descriptor suitable
for converting byte sequences from character encoding fromcode to
character encoding tocode.
The values permitted for fromcode and tocode and the supported
combinations are system-dependent.
For the GNU C library, the permitted
values are listed by the iconv --list command, and all combinations
of the listed values are supported.
Furthermore the GNU C library and the
GNU libiconv library support the following two suffixes:
When the string "//TRANSLIT" is appended to tocode, transliteration
This means that when a character cannot be represented in the
target character set, it can be approximated through one or several
similarly looking characters.
When the string "//IGNORE" is appended to tocode, characters that
cannot be represented in the target character set will be silently discarded.
The resulting conversion descriptor can be used with
any number of times.
It remains valid until deallocated using
A conversion descriptor contains a conversion state.
After creation using
the state is in the initial state.
modifies the descriptor's conversion state.
(This implies that a conversion
descriptor can not be used in multiple threads simultaneously.)
To bring the state back to the initial state, use
with NULL as inbuf argument.
function returns a freshly allocated conversion
In case of error, it sets errno and returns
The following error can occur, among others:
The conversion from fromcode to tocode is not supported by the
This function is available in glibc since version 2.1.