On Thu, Mar 03, 2011 at 11:26:12AM -0500, Frank Solensky wrote: > In sys/netinet/ip.h, the first octet of the ip header structure tests > the byte ordering to determine the ordering of the header length > (ip_hl) and version (ip_v) fields. > > My question: that always works? While my reading of the language > specification document leaves both the ordering of the bits within a > byte and the bytes within a longer field as implementation choices, > the two are independent of each other. > > I haven't run into a CPU where this assumption was proven incorrect. > It just surprised me to see that recently
Unless you have a CPU where memory is addressed bit-by-bit rather than byte-by-byte the ordering of bits within a byte is not only completely irrelevant, it is also pretty much impossible to determine programatically. -- <Insert your favourite quote here.> Erik Trulsson ertr1...@student.uu.se _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"