1 files changed, 181 insertions, 0 deletions
diff --git a/intl/icu/source/common/locavailable.cpp b/intl/icu/source/common/locavailable.cpp
new file mode 100644
index 000000000..6016fde01
--- /dev/null
+++ b/intl/icu/source/common/locavailable.cpp
@@ -0,0 +1,181 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1997-2013, 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 "uassert.h"
+#include "umutex.h"
+#include "uresimp.h"
+
+// C++ API ----------------------------------------------------------------- ***
+
+U_NAMESPACE_BEGIN
+
+static icu::Locale*  availableLocaleList = NULL;
+static int32_t  availableLocaleListCount;
+static icu::UInitOnce gInitOnce = U_INITONCE_INITIALIZER;
+
+U_NAMESPACE_END
+
+U_CDECL_BEGIN
+
+static UBool U_CALLCONV locale_available_cleanup(void)
+{
+    U_NAMESPACE_USE
+
+    if (availableLocaleList) {
+        delete []availableLocaleList;
+        availableLocaleList = NULL;
+    }
+    availableLocaleListCount = 0;
+    gInitOnce.reset();
+
+    return TRUE;
+}
+
+U_CDECL_END
+
+U_NAMESPACE_BEGIN
+
+void U_CALLCONV locale_available_init() {
+    // This function is a friend of class Locale.
+    // This function is only invoked via umtx_initOnce().
+    
+    // for now, there is a hardcoded list, so just walk through that list and set it up.
+    //  Note: this function is a friend of class Locale.
+    availableLocaleListCount = uloc_countAvailable();
+    if(availableLocaleListCount) {
+       availableLocaleList = new Locale[availableLocaleListCount];
+    }
+    if (availableLocaleList == NULL) {
+        availableLocaleListCount= 0;
+    }
+    for (int32_t locCount=availableLocaleListCount-1; locCount>=0; --locCount) {
+        availableLocaleList[locCount].setFromPOSIXID(uloc_getAvailable(locCount));
+    }
+    ucln_common_registerCleanup(UCLN_COMMON_LOCALE_AVAILABLE, locale_available_cleanup);
+}
+
+const Locale* U_EXPORT2
+Locale::getAvailableLocales(int32_t& count)
+{
+    umtx_initOnce(gInitOnce, &locale_available_init);
+    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;
+static icu::UInitOnce _installedLocalesInitOnce;
+
+/* ### Get available **************************************************/
+
+static UBool U_CALLCONV uloc_cleanup(void) {
+    char ** temp;
+
+    if (_installedLocales) {
+        temp = _installedLocales;
+        _installedLocales = NULL;
+
+        _installedLocalesCount = 0;
+        _installedLocalesInitOnce.reset();
+
+        uprv_free(temp);
+    }
+    return TRUE;
+}
+
+// Load Installed Locales. This function will be called exactly once
+//   via the initOnce mechanism.
+
+static void U_CALLCONV loadInstalledLocales() {
+    UResourceBundle *indexLocale = NULL;
+    UResourceBundle installed;
+    UErrorCode status = U_ZERO_ERROR;
+    int32_t i = 0;
+    int32_t localeCount;
+    
+    U_ASSERT(_installedLocales == NULL);
+    U_ASSERT(_installedLocalesCount == 0);
+
+    _installedLocalesCount = 0;
+    ures_initStackObject(&installed);
+    indexLocale = ures_openDirect(NULL, _kIndexLocaleName, &status);
+    ures_getByKey(indexLocale, _kIndexTag, &installed, &status);
+    
+    if(U_SUCCESS(status)) {
+        localeCount = ures_getSize(&installed);
+        _installedLocales = (char **) uprv_malloc(sizeof(char*) * (localeCount+1));
+        if (_installedLocales != NULL) {
+            ures_resetIterator(&installed);
+            while(ures_hasNext(&installed)) {
+                ures_getNextString(&installed, NULL, (const char **)&_installedLocales[i++], &status);
+            }
+            _installedLocales[i] = NULL;
+            _installedLocalesCount = localeCount;
+            ucln_common_registerCleanup(UCLN_COMMON_ULOC, uloc_cleanup);
+        }
+    }
+    ures_close(&installed);
+    ures_close(indexLocale);
+}
+
+static void _load_installedLocales()
+{
+    umtx_initOnce(_installedLocalesInitOnce, &loadInstalledLocales);
+}
+
+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;
+}
+