Re: [SOLVED] Re: and/or missbehaviour in embedded lua 5.1

[Lisa Parratt <lisa@...>]

Mike Pall wrote:
> Hi,
>
> Andreas Stenius wrote:
> > -   e1->u.s.info = e2->u.s.info; e1->u.s.aux = e2->u.s.aux;
> > +   e1->u = e2->u;
>
> Ok, this is a serious bug in Lua 5.1. It's only visible if
> sizeof(int)*2 < sizeof(lua_Number). I.e. it probably only affects
> 16 bit CPUs with lua_Number defined as a double.

ITYM 16 bit CPUs with out of spec C compilers ;) int *should* be 32 
bits, regardless of the architecture.

Not that I'm naive enough to think that there are more than one or two 
in spec C compilers out there, mind.

> But the fix bears the question: is union assignment part of C89?

This is the bigger concern. If not, I'm suspecting there's also not a 
nice standard way you can massage this away with macro magic, either :(

--
Lisa