Re: Strange bit shifting result with gcc - am I missing something obvious?

[Eric Sosman]

Boltar wrote:
> On 30 Mar, 21:37, jacob navia <ja...@xxxxxxxxxx> wrote:
> > The result of shifting more than sizeof(int)*CHAR_BIT positions
> > is NOT defined by the language. It is an illegal expression.
>
> It isn't? Thats bloody annoying since that means i'll have to do a
> specific check for the bit shift count being > than the size of the
> type being shifted.

    Actually, you need to check for >=, not just >.  And
with signed integers, you need to be sure the value being
shifted is non-negative and small enough that no 1's are
propagated into the sign position.

--
Eric Sosman
esosman@xxxxxxxxxxxxxxxxxxxx