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Documentation to the above changes (bug 10871).

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[BZ #10871]
	* manual/locale.texi: Document ALTMON_1..12 constants for
	nl_langinfo.  Specify when to use ALTMON instead of MON.
	* manual/time.texi (strftime, strptime): Document GNU extension
	permitting O modifier with %B and %b.  Specify when to use
	%OB instead of %B.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Rafal Luzynski 2017-09-19 00:00:22 +02:00
parent 761a585ce9
commit 22390764f9
4 changed files with 83 additions and 11 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2018-01-22 Rafal Luzynski <digitalfreak@lingonborough.com>
[BZ #10871]
* manual/locale.texi: Document ALTMON_1..12 constants for
nl_langinfo. Specify when to use ALTMON instead of MON.
* manual/time.texi (strftime, strptime): Document GNU extension
permitting O modifier with %B and %b. Specify when to use
%OB instead of %B.
2018-01-22 Rafal Luzynski <digitalfreak@lingonborough.com>
[BZ #10871]

24
NEWS
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@ -69,6 +69,30 @@ Major new features:
collation ordering. Previous glibc versions used locale-specific
ordering, the change might break systems that relied on that.
* Support for two grammatical forms of month names has been added.
In a call to strftime, the "%B" and "%b" format specifiers will now
produce the grammatical form required when the month is used as part
of a complete date. New "%OB" and "%Ob" specifiers produce the form
required when the month is named by itself. For instance, in Greek
and in many Slavic and Baltic languages, "%B" will produce the month
in genitive case, and "%OB" will produce the month in nominative case.
In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
are all valid and will all accept any known form of month
name---standalone or complete, abbreviated or full. In a call to
nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
the strings used by "%B" and "%b", respectively. New query
constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
used by "%OB" and "%Ob", respectively.
In a locale definition file, use "alt_mon" and "ab_alt_mon" to
define the strings for %OB and %Ob, respectively; these have the
same syntax as "mon" and "ab_mon".
This feature is currently a GNU extension, but it is expected to
be added to the next revision of POSIX, and it is also already
available on some BSD-derived operating systems.
Deprecated and removed features, and other changes affecting compatibility:
* Support for statically linked applications which call dlopen is deprecated

26
manual/locale.texi
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@ -923,7 +923,7 @@ corresponds to Sunday.
@itemx DAY_5
@itemx DAY_6
@itemx DAY_7
Similar to @code{ABDAY_1} etc., but here the return value is the
Similar to @code{ABDAY_1} etc.,@: but here the return value is the
unabbreviated weekday name.
@item ABMON_1
@itemx ABMON_2
@ -937,7 +937,8 @@ unabbreviated weekday name.
@itemx ABMON_10
@itemx ABMON_11
@itemx ABMON_12
The return value is abbreviated name of the month. @code{ABMON_1}
The return value is the abbreviated name of the month, in the grammatical
form used when the month forms part of a complete date. @code{ABMON_1}
corresponds to January.
@item MON_1
@itemx MON_2
@ -951,8 +952,27 @@ corresponds to January.
@itemx MON_10
@itemx MON_11
@itemx MON_12
Similar to @code{ABMON_1} etc., but here the month names are not abbreviated.
Similar to @code{ABMON_1} etc.,@: but here the month names are not abbreviated.
Here the first value @code{MON_1} also corresponds to January.
@item ALTMON_1
@itemx ALTMON_2
@itemx ALTMON_3
@itemx ALTMON_4
@itemx ALTMON_5
@itemx ALTMON_6
@itemx ALTMON_7
@itemx ALTMON_8
@itemx ALTMON_9
@itemx ALTMON_10
@itemx ALTMON_11
@itemx ALTMON_12
Similar to @code{MON_1} etc.,@: but here the month names are in the grammatical
form used when the month is named by itself. The @code{strftime} functions
use these month names for the format specifier @code{OB}.
Note that not all languages need two different forms of the month names,
so the strings returned for @code{MON_@dots{}} and @code{ALTMON_@dots{}}
may or may not be the same, depending on the locale.
@item AM_STR
@itemx PM_STR
The return values are strings which can be used in the representation of time

35
manual/time.texi
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@ -1346,8 +1346,13 @@ example, @code{%Ex} might yield a date format based on the Japanese
Emperors' reigns.
@item O
Use the locale's alternate numeric symbols for numbers. This modifier
applies only to numeric format specifiers.
With all format specifiers that produce numbers: use the locale's
alternate numeric symbols.
With @code{%B} and @code{%b}: use the grammatical form for month names
that is appropriate when the month is named by itself, rather than
the form that is appropriate when the month is used as part of a
complete date. This is a GNU extension.
@end table
If the format supports the modifier but no alternate representation
@ -1365,13 +1370,21 @@ The abbreviated weekday name according to the current locale.
The full weekday name according to the current locale.
@item %b
The abbreviated month name according to the current locale.
The abbreviated month name according to the current locale, in the
grammatical form used when the month is part of a complete date.
As a GNU extension, the @code{O} modifier can be used (@code{%Ob})
to get the grammatical form used when the month is named by itself.
@item %B
The full month name according to the current locale.
The full month name according to the current locale, in the
grammatical form used when the month is part of a complete date.
As a GNU extension, the @code{O} modifier can be used (@code{%OB})
to get the grammatical form used when the month is named by itself.
Using @code{%B} together with @code{%d} produces grammatically
incorrect results for some locales.
Note that not all languages need two different forms of the month
names, so the text produced by @code{%B} and @code{%OB}, and by
@code{%b} and @code{%Ob}, may or may not be the same, depending on
the locale.
@item %c
The preferred calendar time representation for the current locale.
@ -1778,8 +1791,14 @@ the full name.
@item %b
@itemx %B
@itemx %h
The month name according to the current locale, in abbreviated form or
the full name.
A month name according to the current locale. All three specifiers
will recognize both abbreviated and full month names. If the
locale provides two different grammatical forms of month names,
all three specifiers will recognize both forms.
As a GNU extension, the @code{O} modifier can be used with these
specifiers; it has no effect, as both grammatical forms of month
names are recognized.
@item %c
The date and time representation for the current locale.