a UTF-16 encoded string
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. [allow-none]
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-16 to UCS-4. The result will be nul-terminated.