On Thu, 6 Jan 2005, Mads Martin Joergensen wrote:
> Matthew Dillon wrote:
> > :Isn't it better to use the '\0' to make it clear it's a character?
> > :style(9) says this:
> > :
> > : Do not use ! for tests unless it is a boolean, e.g. use
> > :
> > : if (*p == '\0')
> > :
> > : not
> > :
> > : if (!*p)
> > :
> > :Of course it ends up being personal preference, but anyway, just curious.
> >
> > Something like '\n' at least has some readability value, but
> > '\0' doesn't, really. Or at least, not much.
> >
> > I guess it's personal preference, I could go either way but I
> > would tend to just use 0.
>
> Would 0 not be 32-bit and '\0' 8-bit?
GCC knows the difference. The above code will produce assembler like:
cmpb $0,(%eax) //compare byte to the address pointed to by eax
//some jump condition
If you ever have any doubts, try "%gcc -S the_name_of_your_program.c".
This command will produce a filed called "the_name_of_your_program.s",
which is AT&T syntax assembler. See the man for gcc and info as.
-Zera Holladay