List Archive: gentoo-science
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Miguel Barao <mjsb@...> (Thu, 27 Oct 2005 15:24:54 +0100):
> The answer is in 'man signbit'.
> signbit is probably just ANDing your float value with 2^31=0x80000000 which
> reads -2147483648 if considered as a signed int (like in your printf).
Yes. The manpage doesn't say it returns 1, but it returns non-zero.
-2147483648 is non-zero. You need to check if the value is !0, not if
the value is 1. By the way, this holds for many boolean functions.
Get my public key via GnuPG with one of:
gpg --keyserver subkeys.pgp.net --recv-keys CE402012
gpg --keyserver ldap://keyserver.pgp.com/ --recv-keys CE402012
Or via web-based keyserver:
0F12 0912 DFC8 2FC5 E2B8 A23E 6BAC 998E CE40 2012