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// © 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: UTF-8
* 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 gInitOnceLocale = 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;
gInitOnceLocale.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(gInitOnceLocale, &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() {
UErrorCode status = U_ZERO_ERROR;
int32_t i = 0;
int32_t localeCount;
U_ASSERT(_installedLocales == NULL);
U_ASSERT(_installedLocalesCount == 0);
_installedLocalesCount = 0;
icu::LocalUResourceBundlePointer indexLocale(ures_openDirect(NULL, _kIndexLocaleName, &status));
icu::StackUResourceBundle installed;
ures_getByKey(indexLocale.getAlias(), _kIndexTag, installed.getAlias(), &status);
if(U_SUCCESS(status)) {
localeCount = ures_getSize(installed.getAlias());
_installedLocales = (char **) uprv_malloc(sizeof(char*) * (localeCount+1));
if (_installedLocales != NULL) {
ures_resetIterator(installed.getAlias());
while(ures_hasNext(installed.getAlias())) {
ures_getNextString(installed.getAlias(), NULL, (const char **)&_installedLocales[i++], &status);
}
_installedLocales[i] = NULL;
_installedLocalesCount = localeCount;
ucln_common_registerCleanup(UCLN_COMMON_ULOC, uloc_cleanup);
}
}
}
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;
}