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Merged
merged 9 commits into from
Feb 29, 2024
Merged

random: Clean up seeding API #13540

merged 9 commits into from
Feb 29, 2024

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@TimWolla
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@TimWolla TimWolla commented Feb 27, 2024

As promised in #13350 (comment):

As a possible follow-up, I plan to remove the seed member from the struct php_random_algo and instead add well-typed engine specific seed functions, because seeding an engine generically does not appear super useful to me (Mt19937 ignores the upper half of the uint64_t seed for example).
@TimWolla
random: Expose xoshiro256**'s seeding functions
c92a3bb
@TimWolla
random: Expose pcgoneseq128xslrr64's seeding functions
04cbee6
@TimWolla
random: Expose Mt19937's seeding functions
c63d81f
@TimWolla
random: Expose CombinedLCG's seeding functions
305f880
@TimWolla
random: Call php_random_mt19937_seed32 to seed the global Mt19937
164692b 
This avoids the function pointer indirection and improves type safety.
@TimWolla
random: NULL the generic seeding function
e365e70 
Different engines work quite differently, it is not useful to attempt to seed them in a generic way using a 64 bit integer. As an example Mt19937 completely ignores the upper 32 bits.
@TimWolla
random: Remove the seed member from php_random_algo
ad1fd44 
See the explanation in the previous commit for the reasoning. This member is unused since the previous commit and was not consistently available even before that (specifically for the Secure engine).
@TimWolla
UPGRADING.INTERNALS
cbcaa05
@TimWolla
random: Remove useless cast in php_mt_srand()
ed18365
@TimWolla TimWolla requested a review from ndossche February 27, 2024 20:49
@TimWolla TimWolla requested a review from zeriyoshi as a code owner February 27, 2024 20:49
ndossche
ndossche approved these changes Feb 27, 2024
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@ndossche ndossche left a comment

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Change looks good to me.
The macOS failure and Linux NTS failure are unrelated to this PR.
@TimWolla TimWolla merged commit 99e7cf0 into php:master Feb 29, 2024
@TimWolla TimWolla deleted the random-seed-api branch May 23, 2024 19:38
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Extension: random

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@TimWolla @ndossche @Girgias @zeriyoshi