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[Uid] Fix time to float conversion #40003

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Merged
merged 1 commit into from
Jan 27, 2021
Merged

[Uid] Fix time to float conversion #40003

merged 1 commit into from
Jan 27, 2021

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fancyweb
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@fancyweb fancyweb commented Jan 27, 2021 •
edited by nicolas-grekas
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Q A
Branch? 5.2
Bug fix? yes
New feature? no
Deprecations? no
Tickets -
License MIT
Doc PR -

On 32b systems, when the timestamp is before the UNIX epoch, the result is currently shifted by 1. Inverting all the bits is not enough, we need to add 1. I guess https://en.wikipedia.org/wiki/Two%27s_complement is relevant here?

Alternative:

$time = -1 * self::toBase(self::add($time ^ "\xff\xff\xff\xff\xff\xff\xff\xff", "\x00\x00\x00\x00\x00\x00\x00\x01"), self::BASE10);

@carsonbot
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Hey!

I appreciate you submitting this PR.

But you have made this PR towards a branch that is not maintained anymore. :/
Could you update the PR base branch to target one of these branches instead? 4.4, 5.2.

Cheers!

Carsonbot

@carsonbot carsonbot added the Bug label Jan 27, 2021
@nicolas-grekas nicolas-grekas added this to the 5.2 milestone Jan 27, 2021
nicolas-grekas
nicolas-grekas approved these changes Jan 27, 2021
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(for 5.2, 5.1 is EOLed now)

@fancyweb fancyweb changed the base branch from 5.1 to 5.2 January 27, 2021 17:12
@fancyweb fancyweb force-pushed the uid/fix-32b-time-to-float branch from f90978a to 9680a27 Compare January 27, 2021 17:12
@nicolas-grekas
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Thank you @fancyweb.

@nicolas-grekas nicolas-grekas merged commit 6a935bb into symfony:5.2 Jan 27, 2021
@fancyweb fancyweb deleted the uid/fix-32b-time-to-float branch January 27, 2021 18:14
@fabpot fabpot mentioned this pull request Feb 3, 2021
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@nicolas-grekas nicolas-grekas nicolas-grekas approved these changes

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