[cperciva]

Dumb question though...

There's no such thing as a dumb question, only people too dumb to take every available opportunity to learn. ;-)

In C, "if (foo)" means "if (foo != 0)" if foo has integer type, so that line means "if (rehash(H) != 0)" or (since rehash only returns 0 or -1) equivalently "if (rehash(H) == -1)".

[qeorge]

Thanks so much Colin, I'm learning a lot today. :)