Check in the pristine copy of ICU 4.6...

icu46/source/common/locavailable.cpp

+/*
+*******************************************************************************
+*
+*   Copyright (C) 1997-2010, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*   file name:  locavailable.cpp
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2010feb25
+*   created by: Markus W. Scherer
+*
+*   Code for available locales, separated out from other .cpp files
+*   that then do not depend on resource bundle code and res_index bundles.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/locid.h"
+#include "unicode/uloc.h"
+#include "unicode/ures.h"
+#include "cmemory.h"
+#include "ucln_cmn.h"
+#include "umutex.h"
+#include "uresimp.h"
+
+// C++ API ----------------------------------------------------------------- ***
+
+static U_NAMESPACE_QUALIFIER Locale*  availableLocaleList = NULL;
+static int32_t  availableLocaleListCount;
+
+U_CDECL_BEGIN
+
+static UBool U_CALLCONV locale_available_cleanup(void)
+{
+    U_NAMESPACE_USE
+
+    if (availableLocaleList) {
+        delete []availableLocaleList;
+        availableLocaleList = NULL;
+    }
+    availableLocaleListCount = 0;
+
+    return TRUE;
+}
+
+U_CDECL_END
+
+U_NAMESPACE_BEGIN
+
+const Locale* U_EXPORT2
+Locale::getAvailableLocales(int32_t& count)
+{
+    // for now, there is a hardcoded list, so just walk through that list and set it up.
+    UBool needInit;
+    UMTX_CHECK(NULL, availableLocaleList == NULL, needInit);
+
+    if (needInit) {
+        int32_t locCount = uloc_countAvailable();
+        Locale *newLocaleList = 0;
+        if(locCount) {
+           newLocaleList = new Locale[locCount];
+        }
+        if (newLocaleList == NULL) {
+            count = 0;
+            return NULL;
+        }
+
+        count = locCount;
+
+        while(--locCount >= 0) {
+            newLocaleList[locCount].setFromPOSIXID(uloc_getAvailable(locCount));
+        }
+
+        umtx_lock(NULL);
+        if(availableLocaleList == 0) {
+            availableLocaleListCount = count;
+            availableLocaleList = newLocaleList;
+            newLocaleList = NULL;
+            ucln_common_registerCleanup(UCLN_COMMON_LOCALE_AVAILABLE, locale_available_cleanup);
+        }
+        umtx_unlock(NULL);
+        delete []newLocaleList;
+    }
+    count = availableLocaleListCount;
+    return availableLocaleList;
+}
+
+
+U_NAMESPACE_END
+
+// C API ------------------------------------------------------------------- ***
+
+U_NAMESPACE_USE
+
+/* ### Constants **************************************************/
+
+/* These strings describe the resources we attempt to load from
+ the locale ResourceBundle data file.*/
+static const char _kIndexLocaleName[] = "res_index";
+static const char _kIndexTag[]        = "InstalledLocales";
+
+static char** _installedLocales = NULL;
+static int32_t _installedLocalesCount = 0;
+
+/* ### Get available **************************************************/
+
+static UBool U_CALLCONV uloc_cleanup(void) {
+    char ** temp;
+
+    if (_installedLocales) {
+        temp = _installedLocales;
+        _installedLocales = NULL;
+
+        _installedLocalesCount = 0;
+
+        uprv_free(temp);
+    }
+    return TRUE;
+}
+
+static void _load_installedLocales()
+{
+    UBool   localesLoaded;
+
+    UMTX_CHECK(NULL, _installedLocales != NULL, localesLoaded);
+    
+    if (localesLoaded == FALSE) {
+        UResourceBundle *indexLocale = NULL;
+        UResourceBundle installed;
+        UErrorCode status = U_ZERO_ERROR;
+        char ** temp;
+        int32_t i = 0;
+        int32_t localeCount;
+        
+        ures_initStackObject(&installed);
+        indexLocale = ures_openDirect(NULL, _kIndexLocaleName, &status);
+        ures_getByKey(indexLocale, _kIndexTag, &installed, &status);
+        
+        if(U_SUCCESS(status)) {
+            localeCount = ures_getSize(&installed);
+            temp = (char **) uprv_malloc(sizeof(char*) * (localeCount+1));
+            /* Check for null pointer */
+            if (temp != NULL) {
+                ures_resetIterator(&installed);
+                while(ures_hasNext(&installed)) {
+                    ures_getNextString(&installed, NULL, (const char **)&temp[i++], &status);
+                }
+                temp[i] = NULL;
+
+                umtx_lock(NULL);
+                if (_installedLocales == NULL)
+                {
+                    _installedLocalesCount = localeCount;
+                    _installedLocales = temp;
+                    temp = NULL;
+                    ucln_common_registerCleanup(UCLN_COMMON_ULOC, uloc_cleanup);
+                } 
+                umtx_unlock(NULL);
+
+                uprv_free(temp);
+            }
+        }
+        ures_close(&installed);
+        ures_close(indexLocale);
+    }
+}
+
+U_CAPI const char* U_EXPORT2
+uloc_getAvailable(int32_t offset) 
+{
+    
+    _load_installedLocales();
+    
+    if (offset > _installedLocalesCount)
+        return NULL;
+    return _installedLocales[offset];
+}
+
+U_CAPI int32_t  U_EXPORT2
+uloc_countAvailable()
+{
+    _load_installedLocales();
+    return _installedLocalesCount;
+}