[ruby-core:62341] [ruby-trunk - Bug #9794] DateTime.strptime() doesn't work correctly for '%s %z'

Issue #9794 has been updated by Felipe Contreras.


tadayoshi funaba wrote:
> /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
>    (i.e. English) day/month names, and it doesn't work correctly with %z. */

This has already been agreed: make options in strptime() are not portable, but that includes '%s' as well.

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Bug #9794: DateTime.strptime() doesn't work correctly for '%s %z'
https://bugs.ruby-lang.org/issues/9794#change-46497

* Author: Felipe Contreras
* Status: Rejected
* Priority: Low
* Assignee: tadayoshi funaba
* Category: ext
* Target version: 
* ruby -v: 2.1.1p76
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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Time.strptime() works correctly:

    Time.strptime('0 +0100', '%s %z').strftime('%s %z')
    => "0 +0100"

But DateTime.strptime() doesn't:

    DateTime.strptime('0 +0100', '%s %z').strftime('%s %z')
    => "0 +0000"

In Rubinious it does work correctly:

    DateTime.strptime('0 +0100', '%s %z').strftime('%s %z')
    => "0 +0100"

This make the RubySL date space fail:

    DateTime#strptime parses seconds and timezone correctly FAILED
    Expected "1970-01-01T00:00:00+00:00"
     to equal "1970-01-01T01:00:00+01:00"

In addition, both C and perl preserver the offset correctly when doing '%s %z'.

So it's very clear DateTime.strptime() has to be fixed.

Patch attached.

---Files--------------------------------
0001-datetime-fix-strptime-s-z.patch (1.94 KB)


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