Re: Failure in bitwise operations moving from 5.2.x to 5.3.x

On Tue, Mar 15, 2011 at 12:15 PM, Adam Richardson <simpleshot@gmail.com>wrote: > On Tue, Mar 15, 2011 at 11:50 AM, Andy McKenzie <amckenzie4@gmail.com>wrote: > >> > Now: I did a little more looking around this morning, and it looks >> > like I may well run into problems here given that I'm moving from a >> > 32-bit architecture to a 64-bit architecture. Bitwise math is still >> > fairly obscure to me, so it's likely that I'm overlooking something >> > obvious, but maybe instead of asking "How do I fix this?" I should be >> > asking "What would the right way to do this have been?" As I think I >> > said before, I didn't actually write most of this code, I inherited >> > it, and as long as the input and output of the class remain the same, >> > I don't actually care how the work is done. >> > >> > >> > If anyone has any useful input here, I'd appreciate it! >> > >> > -Alex >> > >> >> As it turns out, the most important lesson here is: "Don't trust what >> anyone tells you." The old server is 64-bit. The new server is >> 32-bit. Once I stopped to check that myself, it all became clear. >> For the archives, here's what happened. >> >> Everything worked fine until I ran bindec() on the binary netmask; at >> that point it returned a float rather than an int, as it it used to. >> Therefore, when I ran ip2long on the result, it choked, and returned >> bool(false). Which isn't really useful when you're trying to produce >> a human-readable netmask, when you get right down to it. >> >> I still don't have a solution that will work on a 32-bit server, but >> now that I know what's going on, I should be able to either find >> something that will work, or get things moved to a 64-bit machine. >> >> >> -Alex >> >> -- >> PHP General Mailing List (http://www.php.net/) >> To unsubscribe, visit: http://www.php.net/unsub.php >> >> > Nice detective work, Alex. > > Thanks for posting this info back to the list. I'm sure some tired-eyed > developer some time in the future will benefit from having this information > available in the list archives (it might even be me once my shabby memory > has lost the index for this valuable info.) > > Adam > > -- > Nephtali: A simple, flexible, fast, and security-focused PHP framework > http://nephtaliproject.com > My apologies: Nice detective work ANDY (sorry, Andy, see earlier note about my shabby memory.) I'd just replied to an Alex on another list. Sorry. Adam -- Nephtali: A simple, flexible, fast, and security-focused PHP framework http://nephtaliproject.com