Re: Pointer arithmetic error

[Bernd Petrovitsch <bernd@firmix.at>]

On Fre, 2008-06-27 at 01:17 +0100, David Given wrote:
> Chris Li wrote:
> [...]
> > I don't think so. The offset part of the ptr_add op is mean to be the
> > absolute offset, not how many element of the pointer index. In other
> > words, it is how many address number it need to add.
> 
> Hmm. True. But even so, it's still not right on my system, which doesn't
> use 8-bit bytes. (It's word addressable where each word can contain any
> value, so sizeof(int) == sizeof(double) == sizeof(char) == 1.)

/usr/include/limits.h should have a correct #define CHAR_BIT.

> Should there, then, be another symbol to define the number of bits in a
> byte, distinct from the number of bits in a char?

In C, there is no type "byte" (unless you typedef oder #define it).
"byte" is usually (but not necessarily) meant as "unsigned char".

	Bernd
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