godot/thirdparty/icu4c/common/locavailable.cpp

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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/errorcode.h"
#include "unicode/utypes.h"
#include "unicode/locid.h"
#include "unicode/uloc.h"
#include "unicode/ures.h"
#include "cmemory.h"
#include "cstring.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 **************************************************/
namespace {
// Enough capacity for the two lists in the res_index.res file
const char** gAvailableLocaleNames[2] = {};
int32_t gAvailableLocaleCounts[2] = {};
icu::UInitOnce ginstalledLocalesInitOnce = U_INITONCE_INITIALIZER;
class AvailableLocalesSink : public ResourceSink {
public:
void put(const char *key, ResourceValue &value, UBool /*noFallback*/, UErrorCode &status) U_OVERRIDE {
ResourceTable resIndexTable = value.getTable(status);
if (U_FAILURE(status)) {
return;
}
for (int32_t i = 0; resIndexTable.getKeyAndValue(i, key, value); ++i) {
ULocAvailableType type;
if (uprv_strcmp(key, "InstalledLocales") == 0) {
type = ULOC_AVAILABLE_DEFAULT;
} else if (uprv_strcmp(key, "AliasLocales") == 0) {
type = ULOC_AVAILABLE_ONLY_LEGACY_ALIASES;
} else {
// CLDRVersion, etc.
continue;
}
ResourceTable availableLocalesTable = value.getTable(status);
if (U_FAILURE(status)) {
return;
}
gAvailableLocaleCounts[type] = availableLocalesTable.getSize();
gAvailableLocaleNames[type] = static_cast<const char**>(
uprv_malloc(gAvailableLocaleCounts[type] * sizeof(const char*)));
if (gAvailableLocaleNames[type] == nullptr) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
for (int32_t j = 0; availableLocalesTable.getKeyAndValue(j, key, value); ++j) {
gAvailableLocaleNames[type][j] = key;
}
}
}
};
class AvailableLocalesStringEnumeration : public StringEnumeration {
public:
AvailableLocalesStringEnumeration(ULocAvailableType type) : fType(type) {
}
const char* next(int32_t *resultLength, UErrorCode&) override {
ULocAvailableType actualType = fType;
int32_t actualIndex = fIndex++;
// If the "combined" list was requested, resolve that now
if (fType == ULOC_AVAILABLE_WITH_LEGACY_ALIASES) {
int32_t defaultLocalesCount = gAvailableLocaleCounts[ULOC_AVAILABLE_DEFAULT];
if (actualIndex < defaultLocalesCount) {
actualType = ULOC_AVAILABLE_DEFAULT;
} else {
actualIndex -= defaultLocalesCount;
actualType = ULOC_AVAILABLE_ONLY_LEGACY_ALIASES;
}
}
// Return the requested string
int32_t count = gAvailableLocaleCounts[actualType];
const char* result;
if (actualIndex < count) {
result = gAvailableLocaleNames[actualType][actualIndex];
if (resultLength != nullptr) {
*resultLength = static_cast<int32_t>(uprv_strlen(result));
}
} else {
result = nullptr;
if (resultLength != nullptr) {
*resultLength = 0;
}
}
return result;
}
void reset(UErrorCode&) override {
fIndex = 0;
}
int32_t count(UErrorCode&) const override {
if (fType == ULOC_AVAILABLE_WITH_LEGACY_ALIASES) {
return gAvailableLocaleCounts[ULOC_AVAILABLE_DEFAULT]
+ gAvailableLocaleCounts[ULOC_AVAILABLE_ONLY_LEGACY_ALIASES];
} else {
return gAvailableLocaleCounts[fType];
}
}
private:
ULocAvailableType fType;
int32_t fIndex = 0;
};
/* ### Get available **************************************************/
static UBool U_CALLCONV uloc_cleanup(void) {
for (int32_t i = 0; i < UPRV_LENGTHOF(gAvailableLocaleNames); i++) {
uprv_free(gAvailableLocaleNames[i]);
gAvailableLocaleNames[i] = nullptr;
gAvailableLocaleCounts[i] = 0;
}
ginstalledLocalesInitOnce.reset();
return TRUE;
}
// Load Installed Locales. This function will be called exactly once
// via the initOnce mechanism.
static void U_CALLCONV loadInstalledLocales(UErrorCode& status) {
ucln_common_registerCleanup(UCLN_COMMON_ULOC, uloc_cleanup);
icu::LocalUResourceBundlePointer rb(ures_openDirect(NULL, "res_index", &status));
AvailableLocalesSink sink;
ures_getAllItemsWithFallback(rb.getAlias(), "", sink, status);
}
void _load_installedLocales(UErrorCode& status) {
umtx_initOnce(ginstalledLocalesInitOnce, &loadInstalledLocales, status);
}
} // namespace
U_CAPI const char* U_EXPORT2
uloc_getAvailable(int32_t offset) {
icu::ErrorCode status;
_load_installedLocales(status);
if (status.isFailure()) {
return nullptr;
}
if (offset > gAvailableLocaleCounts[0]) {
// *status = U_ILLEGAL_ARGUMENT_ERROR;
return nullptr;
}
return gAvailableLocaleNames[0][offset];
}
U_CAPI int32_t U_EXPORT2
uloc_countAvailable() {
icu::ErrorCode status;
_load_installedLocales(status);
if (status.isFailure()) {
return 0;
}
return gAvailableLocaleCounts[0];
}
U_CAPI UEnumeration* U_EXPORT2
uloc_openAvailableByType(ULocAvailableType type, UErrorCode* status) {
if (U_FAILURE(*status)) {
return nullptr;
}
if (type < 0 || type >= ULOC_AVAILABLE_COUNT) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return nullptr;
}
_load_installedLocales(*status);
if (U_FAILURE(*status)) {
return nullptr;
}
LocalPointer<AvailableLocalesStringEnumeration> result(
new AvailableLocalesStringEnumeration(type), *status);
if (U_FAILURE(*status)) {
return nullptr;
}
return uenum_openFromStringEnumeration(result.orphan(), status);
}