Add bytestream-based 'random' module with PRNG and /dev/urandom handlers & fix float ops on Chez #966
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jiribenes
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Apr 28, 2025
jiribenes
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Apr 28, 2025
jiribenes
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Apr 29, 2025
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| def unixRandom(): Unit = { | ||
| with boundary; | ||
| with on[IOError].report; | ||
| with devurandom; | ||
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| repeat(2) { | ||
| println(randomInt32()) | ||
| } | ||
| } |
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This is not actually called for testing purposes (since how would we figure out if it works?), but serves as a quick demo.
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If we'd want, we could add a test that just asserts that we get some values (not an error).
Note that on Mac/M1, this leads to segfaults for me on LLVM 🤔 (but probably that's the known problem)
jiribenes
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jiribenes
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Apr 29, 2025
jiribenes
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marzipankaiser
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Apr 29, 2025
Comment on lines
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| def unixRandom(): Unit = { | ||
| with boundary; | ||
| with on[IOError].report; | ||
| with devurandom; | ||
|
|
||
| repeat(2) { | ||
| println(randomInt32()) | ||
| } | ||
| } |
There was a problem hiding this comment.
If we'd want, we could add a test that just asserts that we get some values (not an error).
Note that on Mac/M1, this leads to segfaults for me on LLVM 🤔 (but probably that's the known problem)
lenakaeufel
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May 1, 2025
…ers & fix float ops on Chez (effekt-lang#966) Straightforward streaming randomness with an interface supporting both bytes-based PRNG and /dev/urandom.
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Straightforward streaming randomness based on bytes, see the
examplesnamespace.The goal is to unblock #893.
The generator is specialised for 32-bit numbers, always returning only the lowest byte (which might be bad / inefficient, but oh well).
Here's more about the algorithm https://en.wikipedia.org/wiki/Lehmer_random_number_generator
Goals:
Intthrough weird shifting behaviour...)Non-goals: