a UTF-8 encoded string
the maximum length of str to use, in bytes. If len < 0, then the string is nul-terminated.
location to store number of bytes 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.
location to store number of characters written or NULL. The value here stored does not include the trailing 0 character.
a pointer to a newly allocated UCS-4 string. This value must be freed with g_free(). If an error occurs, NULL will be returned and error set.
GException on failure.
Convert a string from UTF-8 to a 32-bit fixed width representation as UCS-4. A trailing 0 will be added to the string after the converted text.