Convert a string from UTF-8 to a 32-bit fixed width representation as UCS-4, assuming valid UTF-8 input.
This function is roughly twice as fast as to_utf32 but does no error checking on the input. A trailing 0 character will be added to the string after the converted text.
the maximum length of
location to store the number of characters in the result, or null.
a UTF-8 encoded string
a pointer to a newly allocated UCS-4 string. This value must be freed with g_free .