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.

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