Matt Stewart wrote:
> The following functions are described as accepting a Rune, but instead
> the parameters are of type long.  Why?
> 
> int runelen(long);
> char *utfrune(char *, long);
> char *utfrrune(char *, long);
> 
 From History in this wikipedia page (http://en.wikipedia.org/wiki/UTF-32):

UCS-4 is sufficient to represent all of the Unicode code space, which 
has 1114112 (= 2^20+2^16) code points and therefore requires only up to 
hexadecimal 10FFFF. Some people consider it wasteful to reserve such a 
large code space for mapping a relatively small set of code points, so a 
new encoding form, UTF-32, was proposed.