Implement taking date strings from messages locale.

* mimic LocaleKit and add option to POSIX locale backend for taking
  the date strings from the messages locale (instead of time locale)

headers/private/libroot/locale/ICUCategoryData.h

@@ -31,6 +31,8 @@ public:
 			const char*			PosixLocaleName()
 									{ return fPosixLocaleName; }
 
+			const Locale&		ICULocale() const;
+
 protected:
 			status_t			_ConvertUnicodeStringToLocaleconvEntry(
 									const UnicodeString& string,
@@ -52,6 +54,14 @@ private:
 };
 
 
+inline
+const Locale&
+ICUCategoryData::ICULocale() const
+{
+	return fLocale;
+}
+
+
 }	// namespace Libroot
 }	// namespace BPrivate
 

headers/private/libroot/locale/ICUTimeData.h

@@ -18,11 +18,15 @@ namespace BPrivate {
 namespace Libroot {
 
 
+class ICUMessagesData;
+
+
 class ICUTimeData : public ICUCategoryData {
 	typedef	ICUCategoryData		inherited;
 public:
 								ICUTimeData(pthread_key_t tlsKey,
-									struct lc_time_t& lcTimeInfo);
+									struct lc_time_t& lcTimeInfo,
+									const ICUMessagesData& messagesData);
 								~ICUTimeData();
 
 			void				Initialize(LocaleTimeDataBridge* dataBridge);
@@ -33,8 +37,6 @@ public:
 
 			const char*			GetLanginfo(int index);
 
-			const Locale&		ICULocale() const;
-
 private:
 			status_t			_SetLCTimeEntries(const UnicodeString* strings,
 									char* destination, int entrySize,
@@ -59,6 +61,8 @@ private:
 			struct lc_time_t&	fLCTimeInfo;
 
 			LocaleTimeDataBridge*	fDataBridge;
+
+			const ICUMessagesData&	fMessagesData;
 };