dfranke

9 ms·

31.
by dfranke 7y ago
Clear your floating point exception register by calling feclearexcept(FE_ALL_EXCEPT). Convert to long by calling lrint(rint(x)). Then check your exception register using fetestexcept(). FE_INEXACT will indicate that the input wasn't an
32.
by dfranke 7y ago
Reproduced from feedback that I gave pg on an earlier draft (omitting things he seems to have addressed): When you say, > But I also believe it will be possible to write efficient implementations based on Bel, by adding restrictions. I&#
33.
by dfranke 7y ago
This is completely knowable, by taking repeated measurements of a reference object, one which was either checked by a more precise instrument or is definitionally correct (e.g. the old reference kilogram or the Greenwich meridian)
34.
by dfranke 7y ago
I've never seen the convention you're using and I don't think I understand it. Conventions I've seen include: * Give an error bound like 45.73490534578° (±0.00002°) and indicate in prose that this is a 2σ bound. * Put no
35.
by dfranke 7y ago
People have this idea that when you take a measurement, you have so-and-so number of significant figures that are probably correct and the rest are just pure noise. But that's not how measurement error works. In the real world, physica
36.
by dfranke 8y ago
That won't work. When we say "constant-time code" what we really mean is "code whose running time is independent of its input". It won't really be constant due to factors like the OS scheduler and the initial s
37.
by dfranke 8y ago
As one of the people who would be getting phone calls about all the software that breaks when EST gets redefined to be four hours behind UTC rather than five, I'd really not want to go to there. Either of "EDT is now year-round&qu
38.
by dfranke 8y ago
Just to clarify the phrase "one of the NTP people": I'm the lead designer of NTS, which adds modern cryptographic security to NTP. I did not design NTP; Dave Mills did that, in large part before I was born. If I got the chanc
39.
Rebuttal to “How not to design a wire protocol” by designer of said protocol(esr.ibiblio.org)
54 points by dfranke 8y ago|3 comments
40.
by dfranke 8y ago
I'm the lead author of the protocol that ESR is critiquing. I've just posted a rebuttal here: http://esr.ibiblio.org/?p=8254#comment-2202914
41.
by dfranke 11y ago
Although this takedown notice evidences some... confusion... about how open source is supposed to work, it looks to me like the target actually did infringe the filer's copyright by stripping his name off the copyright headers, which
42.
Programming Satan's Computer (1995) [pdf](qatar.cmu.edu)
39 points by dfranke 12y ago|0 comments
43.
by dfranke 12y ago
Furthermore, just because you don't have an address doesn't mean you can't receive mail! At least as recently as a few decades ago, there were rural communities in the US where nobody had a street address; the postal service
44.
by dfranke 12y ago
That thread misses the most important way: the length of the request and the length of the response. On most small sites, the combination of the two will be enough to uniquely identify what page you're visiting.
45.
How POODLE Happened(dfranke.us)
162 points by dfranke 12y ago|7 comments
46.
by dfranke 12y ago
Someone else already pointed this out in my comments section. I'm working on an update.
47.
by dfranke 12y ago
Probably not, unless there's something really weird in your Apache config.
48.
by dfranke 12y ago
The qmail bounty explicitly disclaims "bugs outside of qmail", which this one clearly is. So, no.
49.
Shell Shock Exploitation Vectors(dfranke.us)
142 points by dfranke 12y ago|55 comments
50.
by dfranke 12y ago
Speaking as a security researcher at Akamai, I can say that tptacek is 100% correct here. We're absolutely better off for having received Willem's report, and I'm pretty sure we're all mature enough to tolerate the jabs
51.
by dfranke 14y ago
"Luger", originally, meant the Luger P08 pistol. You'd probably recognize it as the sidearm you see the Nazis carrying in WWII movies. It was the first pistol to take the cartridge which today most people just call "9mm". Today, "9mm Luger"
52.
by dfranke 14y ago
Looking at a cartridge from a few feet away, anyone who's a gun geek and has decent eyesight can probably tell you that a 9mm cartridge is either that, a .40 S&W, or something very obscure. Also though, almost all handgun cartridges ha
53.
by dfranke 14y ago
Heh... a similar "project" when I was in high school got me sent to the principal's office once :-)
54.
by dfranke 14y ago
Embrace and extinguish.
55.
by dfranke 14y ago
A.J. was my classmate and chess-teammate in elementary school. I still remember his kicking my ass in a game of blindfold chess while I was sitting next to him on the plane to the scholastic nationals, while concurrently my dad was getting
56.
Entrepreneur Challenges Peter Thiel To Million Dollar Chess Game(businessinsider.com)
6 points by dfranke 14y ago|1 comments
57.
Life support for DNSChanger-infected machines to be cut off on Monday(technologyreview.com)
4 points by dfranke 14y ago|0 comments
58.
by dfranke 14y ago
You didn't mention any assumptions that get screwed up by the presence of leap seconds. N. There are 60 seconds in every minute. N+1. UNIX timestamps always advance monotonically.
59.
by dfranke 14y ago
This looks like the perfect game for goofing off at work without anyone knowing. Especially if you're a DBA.
60.
by dfranke 14y ago
What of Computer Science? Is that staying under CLAS/CISE?

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