File 4051-Allow-the-timezone-part-of-the-string-to-c... of Package erlang

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File 4051-Allow-the-timezone-part-of-the-string-to-contain-onl.patch of Package erlang (Revision c299f11dbd35366482a3c0e1f83a05c5)

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From c86176bfad3b82d9d24c51735dbd24afd6b2512f Mon Sep 17 00:00:00 2001
From: Dieter Schoen <dieter@schoen.or.at>
Date: Sat, 25 Jun 2022 11:29:41 +0200
Subject: [PATCH] Allow the timezone part of the string to contain only an hour
MIME-Version: 1.0
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RFC3339 declares the minutes part of the timezone diff as optional,
which is now enabled with this commit.
E.g.: 2022-06-25 11:04:00+02 is now possible.

Co-authored-by: Björn Gustavsson <bgustavsson@gmail.com>
---
 lib/stdlib/doc/src/calendar.xml | 3 ++-
 lib/stdlib/src/calendar.erl | 9 +++++++--
 lib/stdlib/test/calendar_SUITE.erl | 3 +++
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/stdlib/doc/src/calendar.xml b/lib/stdlib/doc/src/calendar.xml
index fd42939a81..b6fc42de78 100644
--- a/lib/stdlib/doc/src/calendar.xml
+++ b/lib/stdlib/doc/src/calendar.xml
@@ -331,7 +331,8 @@
 <desc>
 Converts an RFC 3339 timestamp into system time. The data format
 of RFC 3339 timestamps is described by
- <url href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</url>.
+ <url href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</url>.
+ Starting from OTP 25.1, the minutes part of the time zone is optional.
 	Valid option:
 	<taglist>
 	 <tag><c>{unit, Unit}</c></tag>
diff --git a/lib/stdlib/src/calendar.erl b/lib/stdlib/src/calendar.erl
index cddb25f55d..e9d3a16dce 100644
--- a/lib/stdlib/src/calendar.erl
+++ b/lib/stdlib/src/calendar.erl
@@ -718,9 +718,14 @@ offset_string_adjustment(_Time, _Unit, "Z") ->
 offset_string_adjustment(_Time, _Unit, "z") ->
 0;
 offset_string_adjustment(_Time, _Unit, Tz) ->
- [Sign, H1, H2, $:, M1, M2] = Tz,
+ [Sign, H1, H2 | MinutesDiff] = Tz,
 Hour = list_to_integer([H1, H2]),
- Min = list_to_integer([M1, M2]),
+ Min = case MinutesDiff of
+ [$:, M1, M2] ->
+ list_to_integer([M1, M2]);
+ [] ->
+ 0
+ end,
 Adjustment = 3600 * Hour + 60 * Min,
 case Sign of
 $- -> -Adjustment;
diff --git a/lib/stdlib/test/calendar_SUITE.erl b/lib/stdlib/test/calendar_SUITE.erl
index 7bda4ca782..138fdfc086 100644
--- a/lib/stdlib/test/calendar_SUITE.erl
+++ b/lib/stdlib/test/calendar_SUITE.erl
@@ -281,6 +281,9 @@ rfc3339(Config) when is_list(Config) ->
 "2000-01-01T10:02:00.000+00:02" =
 do_format(TO * NaPerSec, [{offset, 120 * NaPerSec}]++Na),
 
+ 1656147840 = do_parse("2022-06-25 11:04:00+02", []),
+ 1656155040 = do_parse("2022-06-25 11:04:00-00", []),
+
 
 NStr = "2000-01-01T09:58:00-00:02",
 NStr = do_format(TO, [{offset, -120}]),
-- 
2.35.3

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