From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Booth <neilb@earthling.net>
To: gcc@gcc.gnu.org
Cc: Zack Weinberg <zackw@Stanford.EDU>
Subject: Preprocessor arithmetic
Date: Mon, 13 Nov 2000 15:41:00 -0000
Message-id: <20001113234100.A9631@daikokuya.demon.co.uk>
X-SW-Source: 2000-11/msg00579.html

Can someone explain to me what is wrong with CPP's arithmetic (as
referred to on the web page)?

All arithmetic in CPP is done in HOST_WIDEST_INT.  My understanding is
that this is the widest integer that GCC can support on the host;
which is usually twice the processor's native widest integer (itself
being HOST_WIDE_INT).

If I don't have it right so far, please correct me.

The standard defines intmax_t and uintmax_t as the "greatest width
integer types"; capable of representing any value of any (un)signed
type.  Preprocessor arithmetic should be done in these types.

These types seem to be the same thing to me.  What am I missing?

Neil.