The following issue has been SUBMITTED.
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https://austingroupbugs.net/view.php?id=1904
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Reported By: mirabilos
Assigned To:
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Project: Online Pubs
Issue ID: 1904
Category: Base Definitions
Type: Clarification Requested
Severity: Comment
Priority: normal
Status: New
Name: mirabilos
Organization:
User Reference:
URL:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap07.html#tag_07_03_05
Section: 7.3.5
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Date Submitted: 2025-02-03 04:29 UTC
Last Modified: 2025-02-03 04:29 UTC
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Summary: LC_TIME era start_date (and end_date) possibly
mis-specified
Description:
I played around a bit with getting CE/BCE into era for a locale, and I
stumbled over the spec saying “Years prior to AD¹ 1 shall be represented
as negative numbers.” here.
① AD = CE
This surprised me, as it’s a clear mismatch with struct tm.tm_year, which
uses the proleptic gregorian calendar, and the year preceding 1 is 0, no
discontinuity there. And indeed, on glibc, I had to use the following to
make it work, so libc implementers also do the “obvious” thing instead
of what that little remark in the spec says:
era "+:1:0001//01//01:+*:CE:%-Ey %EC";/
"+:1:0000//12//31:-*:BCE:%-Ey %EC"
Desired Action:
Ideally, someone (more than one, probably) should do a survey of what
implementations do, and someone could see whether this sentence was
deliberately inserted like that, and if there’s no reason to the
contrary, change…
> Years prior to AD 1 shall be represented as negative numbers.
… to…
> The year prior to 1 CE shall be represented as 0, preceding years as
negative numbers.
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Issue History
Date Modified Username Field Change
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2025-02-03 04:29 mirabilos New Issue
2025-02-03 04:29 mirabilos Name => mirabilos
2025-02-03 04:29 mirabilos URL =>
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap07.html#tag_07_03_05
2025-02-03 04:29 mirabilos Section => 7.3.5
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