Re: [avr-gcc-list] are signed chars signed :-) ?

[gouy yann]

 --- Uwe Arends <address@hidden> a écrit : 
> > > > I just understood that 2 minutes ago by
> looking at the avr-libc source!
> > > > First time that I encounter such an
> environment! I have to go thru all my
> > > > code to modify 'char' to 'signed char'.
> > >
> > > you probably know about the -fsigned-char
> commandline switch, don't you?!?!?
> > >
> > 
> > The "-fsigned-char" flag would definitely save him
> some effort, but it is
> 
> That was the intention, to save him some work.
>  
> > still best to be explicit in the code.  Writing
> code whose correctness
> > depends on compiler flags is a bad idea.
> 
> yup
> 
> > As a rule, plain "char" should only be used when
> you really mean a
> > character - i.e., a letter in a string.  "unsigned
> char" and "signed char"
> > are silly names - what sense is there in talking
> about a negative letter?
> > The best way (in that it makes your code more
> readable, and removes a source
> > of error) is to use typedefs to give sensible
> names to "unsigned char" and
> > "signed char", which you then use consistently.  A
> prime example would be to
> > simply include the <inttypes.h> from avr-libc, and
> use int8_t and uint8_t.

I must say that if uint8_t is explicitly unsigned,
int8_t can be confusing, IMHO, sint8_t would habe been
a much better name.

personnaly, I use redefined types u8, s8, u16,...
they are quite short and explicite.

regards.
   Yann


> 
> I wholeheartedly agree :-)
> 
> 
> 
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>  

=====



        

        
                
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