locale: Refactor ctype storage and consolidate some files.

* Drop the global definitions from ctype.h, and move them to
   the internal LocaleData.h: the functions should be used always
   when building new applications (as they're thread-safe.)

 * Make __ctype_get_mb_cur_max thread-safe and move it to live
   alongside the other __ctype...() methods.

 * Put the __ctype...() methods in two files, clearly indicating
   versions: ctype_loc_global for the global (non-thread-safe) versions,
   used for the kernel, and ctype_loc_thread for the libroot versions.

 * Consolidate more internal functions into LocaleInternal.cpp.

headers/private/libroot/locale/LocaleBackend.h

@@ -25,11 +25,13 @@ private:
 	const unsigned short*		localClassInfoTable;
 	const int*					localToLowerTable;
 	const int*					localToUpperTable;
+	unsigned short				localMbCurMax;
 
 public:
 	const unsigned short**		addrOfClassInfoTable;
 	const int**					addrOfToLowerTable;
 	const int**					addrOfToUpperTable;
+	unsigned short*				addrOfMbCurMax;
 
 	const unsigned short* const	posixClassInfo;
 	const int* const			posixToLowerMap;
@@ -39,7 +41,6 @@ public:
 
 	LocaleCtypeDataBridge(bool isGlobal);
 
-	void setMbCurMax(unsigned short mbCurMax);
 	void ApplyToCurrentThread();
 };
 
@@ -61,7 +62,6 @@ struct LocaleMonetaryDataBridge {
 struct LocaleNumericDataBridge {
 public:
 	const struct lconv* const 	posixLocaleConv;
-	bool						isGlobal;
 
 	LocaleNumericDataBridge(bool isGlobal);
 	~LocaleNumericDataBridge();
@@ -89,7 +89,6 @@ public:
 	int*					addrOfDaylight;
 	long*					addrOfTimezone;
 	char**					addrOfTZName;
-	bool					isGlobal;
 
 	TimeConversionDataBridge(bool isGlobal);
 };
@@ -103,7 +102,6 @@ struct LocaleDataBridge {
 	LocaleTimeDataBridge		timeDataBridge;
 	TimeConversionDataBridge	timeConversionDataBridge;
 	const char** const			posixLanginfo;
-	bool						isGlobal;
 
 	LocaleDataBridge(bool isGlobal);
 
@@ -182,6 +180,7 @@ LocaleBackend* GetCurrentLocaleBackend();
 extern LocaleBackend* gGlobalLocaleBackend;
 extern LocaleDataBridge gGlobalLocaleDataBridge;
 
+
 }	// namespace Libroot
 }	// namespace BPrivate
 

headers/private/libroot/locale/LocaleData.h

@@ -9,6 +9,15 @@
 #include <locale.h>
 
 
+extern "C" {
+// Global storage (exported for BeOS and older Haiku compatibility)
+extern const unsigned short int *__ctype_b;
+extern const int *__ctype_tolower;
+extern const int *__ctype_toupper;
+extern unsigned short int __ctype_mb_cur_max;
+}
+
+
 namespace BPrivate {
 namespace Libroot {
 

headers/private/libroot/locale/ThreadLocale.h

@@ -1,34 +0,0 @@
-/*
- * Copyright 2022, Trung Nguyen, [email protected]
- * All rights reserved. Distributed under the terms of the MIT License.
- */
-
-#ifndef _THREAD_LOCALE_H
-#define _THREAD_LOCALE_H
-
-
-#include "LocaleBackend.h"
-
-
-namespace BPrivate {
-namespace Libroot {
-
-
-// The pointer in the TLS will point to this struct.
-struct ThreadLocale {
-	LocaleBackendData*  threadLocaleInfo;
-
-	const unsigned short int* ctype_b;
-	const int* ctype_tolower;
-	const int* ctype_toupper;
-};
-
-
-ThreadLocale* GetCurrentThreadLocale();
-
-
-}	// namespace Libroot
-}	// namespace BPrivate
-
-
-#endif	// _THREAD_LOCALE_H