> -Original Message-
> From:
> [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> org] On Behalf Of Paulo Marques
> Sent: Monday, October 09, 2006 4:39 AM
> To: larry barello
> Cc: avr-gcc-list@nongnu.org
> Subject: Re: [avr-gcc-list] C coding questi
larry barello wrote:
[...]
So I said:
(bSomeBool?1:0) ^ ((SomeBitMask & SomeVariable)?1:0))
Since no one else made this comment, I just wanted to point out that you
can write that as:
(bSomeBool ^ (!!(SomeBitMask & SomeVariable)))
"!!" is often used to convert an integer value into a logic
"Larry Barello" <[EMAIL PROTECTED]> wrote:
> There doesn't appear to be "stdbool.h" as part of WinAvr, ...
Of course, there is.
Common pitfall: the AVR-GCC installation ships with *two* (disjunct)
sets of header files. One set is part of the GCC installation, and
things like belong to that gro
L PROTECTED] On Behalf Of Tom
Deutschman
Sent: Friday, October 06, 2006 6:17 AM
To: avr-gcc-list@nongnu.org
Subject: [QUARANTINE] Re: [avr-gcc-list] C coding question
Importance: Low
I agree with Nigel, but yes, (!0 == 1).
Quoted from C Programming Language Reference Manual section A7.4.7
The
Hi,
On Fri, 06 Oct 2006 13:39:36 +0530, Nigel Winterbottom <[EMAIL PROTECTED]>
wrote:
>> -Original Message-
>> From: larry barello
>
>> Specifically I was looking for an efficient way to encode
>>
>> (bSomeBool ^ (SomeBitMask & SomeVariable))
>>
>> to get a true/false output.
> --
I agree with Nigel, but yes, (!0 == 1).Quoted from C Programming Language Reference Manual section A7.4.7
The
operand of the ! operator must have arithmetic type or be a pointer,
and the result is 1 if the value of its operand compares equal to 0,
and 0 otherwise. The type of the result is int.
> -Original Message-
> From: larry barello
> Specifically I was looking for an efficient way to encode
>
> (bSomeBool ^ (SomeBitMask & SomeVariable))
>
> to get a true/false output.
Does it have to be an expression ?
If not, what's wrong with:
if (SomeBitMask & SomeVariable)
b
"larry barello" <[EMAIL PROTECTED]> wrote:
> when mixing bit-wise and logical operations, is it safe to assume
> that (!0 == 1) is true?
I think it is, but would have to look it up in the standard.
Use , the type "bool", and the values "true" and "false"
instead. That's the C99 approach.
--
c
