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Re: Syntax for label
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Date: -- (:)
From: Sven LUTHER <luther@d...>
Subject: Re: Unsigned integers?
On Wed, Mar 22, 2000 at 09:22:15AM +1100, John Max Skaller wrote:
> I have some code for processing ISO-10646 characters and UTF-8,
> which uses caml integers. ISO-10646 has 2^31 code points, which
> can be covered by caml integers on a 32bit machine. Using an
> unboxed type is mandatory for performance.
> 
> Unfortunately, caml integers are signed, which makes most of the
> code I have written wrong (I haven't taken the care to handle
> integers over 2^30 correctly).
> 
> What is the best way to handle this problem?
> Would a (standard?) library module (written in C), that treats
> integers as unsigned be a reasonable solution?
> 
> [This may require writing 'uint_add x y' instead of 'x+y',
> but that doesn't matter in the above mentioned application,
> since the integers are being used to represent characters]

Just use the caml integer and ignore the fact that they are signed ?

after the moto :  that doesn't matter in the above mentioned application,
since the integers are being used to represent characters] 

But then i don't know what you use it for ...

And also, you would have to check exactly how integer overflow work, but in my
experience max_int+1 = min_int.

Friendly,

Sven LUTHER