// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2002-2014, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_SERVICE || !UCONFIG_NO_TRANSLITERATION
#include "unicode/resbund.h"
#include "cmemory.h"
#include "ustrfmt.h"
#include "locutil.h"
#include "charstr.h"
#include "ucln_cmn.h"
#include "uassert.h"
#include "umutex.h"
// see LocaleUtility::getAvailableLocaleNames
static icu::UInitOnce LocaleUtilityInitOnce = U_INITONCE_INITIALIZER;
static icu::Hashtable * LocaleUtility_cache = NULL;
#define UNDERSCORE_CHAR ((UChar)0x005f)
#define AT_SIGN_CHAR ((UChar)64)
#define PERIOD_CHAR ((UChar)46)
/*
******************************************************************
*/
/**
* Release all static memory held by Locale Utility.
*/
U_CDECL_BEGIN
static UBool U_CALLCONV service_cleanup(void) {
if (LocaleUtility_cache) {
delete LocaleUtility_cache;
LocaleUtility_cache = NULL;
}
return TRUE;
}
static void U_CALLCONV locale_utility_init(UErrorCode &status) {
using namespace icu;
U_ASSERT(LocaleUtility_cache == NULL);
ucln_common_registerCleanup(UCLN_COMMON_SERVICE, service_cleanup);
LocaleUtility_cache = new Hashtable(status);
if (U_FAILURE(status)) {
delete LocaleUtility_cache;
LocaleUtility_cache = NULL;
return;
}
if (LocaleUtility_cache == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
LocaleUtility_cache->setValueDeleter(uhash_deleteHashtable);
}
U_CDECL_END
U_NAMESPACE_BEGIN
UnicodeString&
LocaleUtility::canonicalLocaleString(const UnicodeString* id, UnicodeString& result)
{
if (id == NULL) {
result.setToBogus();
} else {
// Fix case only (no other changes) up to the first '@' or '.' or
// end of string, whichever comes first. In 3.0 I changed this to
// stop at first '@' or '.'. It used to run out to the end of
// string. My fix makes the tests pass but is probably
// structurally incorrect. See below. [alan 3.0]
// TODO: Doug, you might want to revise this...
result = *id;
int32_t i = 0;
int32_t end = result.indexOf(AT_SIGN_CHAR);
int32_t n = result.indexOf(PERIOD_CHAR);
if (n >= 0 && n < end) {
end = n;
}
if (end < 0) {
end = result.length();
}
n = result.indexOf(UNDERSCORE_CHAR);
if (n < 0) {
n = end;
}
for (; i < n; ++i) {
UChar c = result.charAt(i);
if (c >= 0x0041 && c <= 0x005a) {
c += 0x20;
result.setCharAt(i, c);
}
}
for (n = end; i < n; ++i) {
UChar c = result.charAt(i);
if (c >= 0x0061 && c <= 0x007a) {
c -= 0x20;
result.setCharAt(i, c);
}
}
}
return result;
#if 0
// This code does a proper full level 2 canonicalization of id.
// It's nasty to go from UChar to char to char to UChar -- but
// that's what you have to do to use the uloc_canonicalize
// function on UnicodeStrings.
// I ended up doing the alternate fix (see above) not for
// performance reasons, although performance will certainly be
// better, but because doing a full level 2 canonicalization
// causes some tests to fail. [alan 3.0]
// TODO: Doug, you might want to revisit this...
result.setToBogus();
if (id != 0) {
int32_t buflen = id->length() + 8; // space for NUL
char* buf = (char*) uprv_malloc(buflen);
char* canon = (buf == 0) ? 0 : (char*) uprv_malloc(buflen);
if (buf != 0 && canon != 0) {
U_ASSERT(id->extract(0, INT32_MAX, buf, buflen) < buflen);
UErrorCode ec = U_ZERO_ERROR;
uloc_canonicalize(buf, canon, buflen, &ec);
if (U_SUCCESS(ec)) {
result = UnicodeString(canon);
}
}
uprv_free(buf);
uprv_free(canon);
}
return result;
#endif
}
Locale&
LocaleUtility::initLocaleFromName(const UnicodeString& id, Locale& result)
{
enum { BUFLEN = 128 }; // larger than ever needed
if (id.isBogus() || id.length() >= BUFLEN) {
result.setToBogus();
} else {
/*
* We need to convert from a UnicodeString to char * in order to
* create a Locale.
*
* Problem: Locale ID strings may contain '@' which is a variant
* character and cannot be handled by invariant-character conversion.
*
* Hack: Since ICU code can handle locale IDs with multiple encodings
* of '@' (at least for EBCDIC; it's not known to be a problem for
* ASCII-based systems),
* we use regular invariant-character conversion for everything else
* and manually convert U+0040 into a compiler-char-constant '@'.
* While this compilation-time constant may not match the runtime
* encoding of '@', it should be one of the encodings which ICU
* recognizes.
*
* There should be only at most one '@' in a locale ID.
*/
char buffer[BUFLEN];
int32_t prev, i;
prev = 0;
for(;;) {
i = id.indexOf((UChar)0x40, prev);
if(i < 0) {
// no @ between prev and the rest of the string
id.extract(prev, INT32_MAX, buffer + prev, BUFLEN - prev, US_INV);
break; // done
} else {
// normal invariant-character conversion for text between @s
id.extract(prev, i - prev, buffer + prev, BUFLEN - prev, US_INV);
// manually "convert" U+0040 at id[i] into '@' at buffer[i]
buffer[i] = '@';
prev = i + 1;
}
}
result = Locale::createFromName(buffer);
}
return result;
}
UnicodeString&
LocaleUtility::initNameFromLocale(const Locale& locale, UnicodeString& result)
{
if (locale.isBogus()) {
result.setToBogus();
} else {
result.append(UnicodeString(locale.getName(), -1, US_INV));
}
return result;
}
const Hashtable*
LocaleUtility::getAvailableLocaleNames(const UnicodeString& bundleID)
{
// LocaleUtility_cache is a hash-of-hashes. The top-level keys
// are path strings ('bundleID') passed to
// ures_openAvailableLocales. The top-level values are
// second-level hashes. The second-level keys are result strings
// from ures_openAvailableLocales. The second-level values are
// garbage ((void*)1 or other random pointer).
UErrorCode status = U_ZERO_ERROR;
umtx_initOnce(LocaleUtilityInitOnce, locale_utility_init, status);
Hashtable *cache = LocaleUtility_cache;
if (cache == NULL) {
// Catastrophic failure.
return NULL;
}
Hashtable* htp;
umtx_lock(NULL);
htp = (Hashtable*) cache->get(bundleID);
umtx_unlock(NULL);
if (htp == NULL) {
htp = new Hashtable(status);
if (htp && U_SUCCESS(status)) {
CharString cbundleID;
cbundleID.appendInvariantChars(bundleID, status);
const char* path = cbundleID.isEmpty() ? NULL : cbundleID.data();
UEnumeration *uenum = ures_openAvailableLocales(path, &status);
for (;;) {
const UChar* id = uenum_unext(uenum, NULL, &status);
if (id == NULL) {
break;
}
htp->put(UnicodeString(id), (void*)htp, status);
}
uenum_close(uenum);
if (U_FAILURE(status)) {
delete htp;
return NULL;
}
umtx_lock(NULL);
Hashtable *t = static_cast<Hashtable *>(cache->get(bundleID));
if (t != NULL) {
// Another thread raced through this code, creating the cache entry first.
// Discard ours and return theirs.
umtx_unlock(NULL);
delete htp;
htp = t;
} else {
cache->put(bundleID, (void*)htp, status);
umtx_unlock(NULL);
}
}
}
return htp;
}
UBool
LocaleUtility::isFallbackOf(const UnicodeString& root, const UnicodeString& child)
{
return child.indexOf(root) == 0 &&
(child.length() == root.length() ||
child.charAt(root.length()) == UNDERSCORE_CHAR);
}
U_NAMESPACE_END
/* !UCONFIG_NO_SERVICE */
#endif