Re: [avr-gcc-list] typecast

[David Breeze]

Don't blame gcc for the typecasting reqirement.  It is not only good practice 
to use typecasting but a requirement at the higher levels of C compliance.  Try 
passing your code through Lint at even the lower requirement levels 2 or 3 and 
it will throw out code which is not type cast where required.

David Breeze

>>> "Sander Pool" <address@hidden> 25 March 2003 23:30:08 >>>

I appologize for being the n'th person with the identical reply. Well, I
added a small rant about gcc :-)

Next time I'll read my entire inbox before replying. I was so exited I knew
the answer to a question I just -had- to send it :-)

    Sander

----- Original Message -----
From: "Sander Pool" <address@hidden>
To: "Torsten Hahn" <address@hidden>; <address@hidden>
Sent: Tuesday, March 25, 2003 3:21 PM
Subject: Re: [avr-gcc-list] typecast


>
> I've been bitten by type conversions quite a bit in the last few weeks, it
> seems you really really have to spell it out to gcc to make it do the
right
> thing. But that's not what you were asking :-)
>
> If you want to have the MSBs of a 16 bit number and stick them in an 8 bit
> variable you could do:
>
> number8 = (uint8_t) (number16 >> 8);
>
> This -should- discard the 8 MSBs of the right shifted number, leaving you
> the original 8 MSBs from number16.
>
>     Sander
>


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