[ CCode ( cname = "g_utf16_to_utf8" ) ]
public string to_utf8 (long len = -1, out long items_read = null, out long items_written = null) throws ConvertError

Convert a string from UTF-16 to UTF-8.

The result will be terminated with a 0 byte.

Note that the input is expected to be already in native endianness, an initial byte-order-mark character is not handled specially. convert can be used to convert a byte buffer of UTF-16 data of ambiguous endianness.

Further note that this function does not validate the result string; it may e.g. include embedded NUL characters. The only validation done by this function is to ensure that the input can be correctly interpreted as UTF-16, i.e. it doesn't contain unpaired surrogates or partial character sequences.



the maximum length (number of unichar2) of str to use. If len < 0, then the string is nul-terminated.


location to store number of words read, or null. If null, then g_convert_error_partial_input will be returned in case str contains a trailing partial character. If an error occurs then the index of the invalid input is stored here. It’s guaranteed to be non-negative.


location to store number of bytes written, or null. The value stored here does not include the trailing 0 byte. It’s guaranteed to be non-negative.


a UTF-16 encoded string


a pointer to a newly allocated UTF-8 string. This value must be freed with g_free . If an error occurs, null will be returned and throws set.