Re: [9fans] acid question

[Rob Pike <robpike@gmail.com>]

Acid can be surprising.

acid; c=a>b
acid; whatis c
integer variable format D
acid; c=a<b
acid; whatis c
integer variable format X

This at least can be fixed by putting
	res->store.fmt = 'D';
in a number of places in src/cmd/acid/expr.c analogous
to its placement in ogt().

-rob


On Fri, 7 Jan 2005 17:36:17 -1000 (HST), Tim Newsham <newsham@lava.net> wrote:
> I have two variables, "a" and "b".  One comes from a symbol name
> (ie: a = main), and the other comes from data returned from strace().
> Normal stuff:
> 
>     print       shows
>     -----------------------------
>     a           0x800529a4
>     b           0x800529a4
>     whatis a    integer variable format X
>     whatis b    integer variable format X
>     a - b       0x00000000
>     b - a       0x00000000
> 
> now weirdness:
>     a == b      0
>     a < b       0x00000001
>     b < a       0x00000000
>     a > b       0
>     b > a       1
> 
> Whats going on here?  Signed vs. unsigned issues?
> 
> Tim N.
>