Newsgroups: comp.lang.c
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Unsigned considerations
Message-ID: <1988Feb7.000253.465@utzoo.uucp>
Organization: U of Toronto Zoology
References: <3373@bobkat.UUCP>
Date: Sun, 7-Feb-88 00:02:50 EST

>     int i;
>     unsigned long ul;
> 
>     ul = i;
> 
> How does the ANSI thing say this conversion should be done?

X3J11 (November draft) says  ul = (unsigned long)(long)i;  is how it happens.
This makes a certain amount of sense:  adjusting the size before adjusting
the signedness produces results that I would say are (a) less surprising,
and (b) more portable across variations in relative sizes of data types.
-- 
Those who do not understand Unix are |  Henry Spencer @ U of Toronto Zoology
condemned to reinvent it, poorly.    | {allegra,ihnp4,decvax,utai}!utzoo!henry