Implement alternative month names (bug 10871).

Some languages (Slavic, Baltic, etc.) require a genitive case of the
month name when formatting a full date (with the day number) while
they require a nominative case when referring to the month standalone.
This requirement cannot be fulfilled without providing two forms for
each month name.  From now it is specified that nl_langinfo(MON_1)
series (up to MON_12) and strftime("%B") generate the month names in
the grammatical form used when the month is a part of a complete date.
If the grammatical form used when the month is named by itself is needed,
the new values nl_langinfo(ALTMON_1) (up to ALTMON_12) and
strftime("%OB") are supported.  This new feature is optional so the
languages which do not need it or do not yet provide the updated
locales simply do not use it and their behaviour is unchanged.

	[BZ #10871]
	* locale/C-time.c (_nl_C_LC_TIME): Add alternative month names,
	define them as the same as primary full month names explicitly.
	* locale/categories.def (LC_TIME): Add alt_mon and wide-alt_mon.
	* locale/langinfo.h (__ALTMON_1, __ALTMON_2, __ALTMON_3, __ALTMON_4,
	__ALTMON_5, __ALTMON_6, __ALTMON_7, __ALTMON_8, __ALTMON_9, __ALTMON_10,
	__ALTMON_11, __ALTMON_12, _NL_WALTMON_1, _NL_WALTMON_2, _NL_WALTMON_3,
	_NL_WALTMON_4, _NL_WALTMON_5, _NL_WALTMON_6, _NL_WALTMON_7,
	_NL_WALTMON_8, _NL_WALTMON_9, _NL_WALTMON_10, _NL_WALTMON_11,
	_NL_WALTMON_12): New enum constants.
	[__USE_GNU] (ALTMON_1, ALTMON_2, ALTMON_3, ALTMON_4, ALTMON_5, ALTMON_6,
	ALTMON_7, ALTMON_8, ALTMON_9, ALTMON_10, ALTMON_11, ALTMON_12): New
	macros.
	* locale/programs/ld-time.c (struct locale_time_t): Add alt_mon,
	walt_mon, and alt_mon_defined members.
	(time_output): Output alt_mon and walt_mon members.
	(time_read): Read them, initialize them as copies of mon and wmon
	respectively if they are missing, initialize alt_mon_defined.
	* locale/programs/locfile-kw.gperf (alt_mon): Define.
	* locale/programs/locfile-kw.h: Regenerate.
	* locale/programs/locfile-token.h (tok_alt_mon): New enum constant.
	* localedata/tst-langinfo.c (map): Add tests for the new constants
	ALTMON_1 .. ALTMON_12.
	* time/Makefile [$(run-built-tests) = yes] (LOCALES): Add fr_FR.UTF-8
	and pl_PL.UTF-8.
	* time/strftime_l.c (f_altmonth): New macro.
	(__strftime_internal): Handle %OB format.
	* time/strptime_l.c [_LIBC] (alt_month_name): New macro.
	(__strptime_internal): Handle %OB format.
	* time/tst-strptime.c (day_tests): Add tests to parse different forms
	of month names including the new %OB format specifier.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 48 insertions, 2 deletions

diff --git a/locale/langinfo.h b/locale/langinfo.h
index 28a0a73..65374dd 100644
--- a/locale/langinfo.h
+++ b/locale/langinfo.h
@@ -100,7 +100,8 @@ enum
   ABMON_12,
 #define ABMON_12		ABMON_12
 
-  /* Long month names.  */
+  /* Long month names, in the grammatical form used when the month
+     is a part of a complete date.  */
   MON_1,			/* January */
 #define MON_1			MON_1
   MON_2,
@@ -189,7 +190,8 @@ enum
   _NL_WABMON_11,
   _NL_WABMON_12,
 
-  /* Long month names.  */
+  /* Long month names, in the grammatical form used when the month
+     is a part of a complete date.  */
   _NL_WMON_1,		/* January */
   _NL_WMON_2,
   _NL_WMON_3,
@@ -231,6 +233,50 @@ enum
 
   _NL_TIME_CODESET,
 
+  /* Long month names, in the grammatical form used when the month
+     is named by itself.  */
+  __ALTMON_1,			/* January */
+  __ALTMON_2,
+  __ALTMON_3,
+  __ALTMON_4,
+  __ALTMON_5,
+  __ALTMON_6,
+  __ALTMON_7,
+  __ALTMON_8,
+  __ALTMON_9,
+  __ALTMON_10,
+  __ALTMON_11,
+  __ALTMON_12,
+#ifdef __USE_GNU
+# define ALTMON_1		__ALTMON_1
+# define ALTMON_2		__ALTMON_2
+# define ALTMON_3		__ALTMON_3
+# define ALTMON_4		__ALTMON_4
+# define ALTMON_5		__ALTMON_5
+# define ALTMON_6		__ALTMON_6
+# define ALTMON_7		__ALTMON_7
+# define ALTMON_8		__ALTMON_8
+# define ALTMON_9		__ALTMON_9
+# define ALTMON_10		__ALTMON_10
+# define ALTMON_11		__ALTMON_11
+# define ALTMON_12		__ALTMON_12
+#endif
+
+  /* Long month names, in the grammatical form used when the month
+     is named by itself.  */
+  _NL_WALTMON_1,			/* January */
+  _NL_WALTMON_2,
+  _NL_WALTMON_3,
+  _NL_WALTMON_4,
+  _NL_WALTMON_5,
+  _NL_WALTMON_6,
+  _NL_WALTMON_7,
+  _NL_WALTMON_8,
+  _NL_WALTMON_9,
+  _NL_WALTMON_10,
+  _NL_WALTMON_11,
+  _NL_WALTMON_12,
+
   _NL_NUM_LC_TIME,	/* Number of indices in LC_TIME category.  */
 
   /* LC_COLLATE category: text sorting.