Re^4: pack() returns an unusable string

unpack "H*" hasn't changed, so what you're saying makes no sense.

Well - you apparently knew that, but I didn't.
I was fairly certain it would be the case and that it should be the case, but I wanted to verify it with an actual example, and your approach does not provide that verification.
(Admittedly, it is pretty hard to see how anything else *could* be the case ;-)

I was also wanting to do the same thing, but replacing "H*" with "D" - in order to verify that rounding would be performed as expected. (It is ... so long as one's expectation is correct.)
Wrt perl-5.34.0, unlike unpack("H*", $string) we see that the value returned by unpack("D", $string) will often vary between 'double' and 'long double' builds, for the very same $string.
I don't doubt that you regard running those checks as also being something that "makes no sense".
But having a "D" template on a perl whose nvtype is 'double' is a little disconcerting to me, and I just want to make sure that its behaviour is clear in my mind.

Cheers,
Rob

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Re^5: pack() returns an unusable string by ikegami (Patriarch) on May 31, 2021 at 17:58 UTC
I was also wanting to do the same thing, but replacing "H" with "D"* That totally misses the point. I suggested using `unpack "H"` as a form of serialization. You'd use in the parent and `pack "H"` in the child in addition to `pack "d"` or `pack "D"` or whatever you want to test. Seeking work! You can reach me at ikegami@adaelis.com	[reply] [d/l] [select]
Re^6: pack() returns an unusable string by syphilis (Archbishop) on May 31, 2021 at 23:31 UTC
That totally misses the point Yes, it totally misses your point, just as you are intent on totally missing mine. Cheers, Rob	[reply]
Re^7: pack() returns an unusable string by ikegami (Patriarch) on Jun 05, 2021 at 01:55 UTC
All you said you wanted to wanted to use D "in order to verify that rounding would be performed as expected." I took that to mean you wanted to test packing/unpacking D in one `perl` and unpacking in the other. I'm guessing you want to test how D works with different Perl build settings. Is it not this? Anyway, no need to be such a jerk just cause I didn't understand a vague statement you just made. If I got it wrong, just clarify what you meant. In any case, unless you want to test sending NUL bytes as in arguments (which you can't do), you missed the point: It doesn't matter how to send the bytes over from one program to another, and all I did was suggest a way of doing this. It doesn't interfere with your attempts to test D in the least, contrary to your claims. Seeking work! You can reach me at ikegami@adaelis.com	[reply] [d/l]
Re^5: pack() returns an unusable string by ikegami (Patriarch) on May 31, 2021 at 01:10 UTC
Why would you think that any or all of `pack "H*"` AND JSON encoders AND base64 encoders AND all the other alternatives I mentioned stopped working? Seeking work! You can reach me at ikegami@adaelis.com	[reply] [d/l]