/*
*******************************************************************************
* Copyright (C) 1997-2003, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
* File TXTBDRY.CPP
*
* Modification History:
*
* Date Name Description
* 02/18/97 aliu Converted from OpenClass. Added DONE.
* 01/13/2000 helena Added UErrorCode parameter to createXXXInstance methods.
*****************************************************************************************
*/
// *****************************************************************************
// This file was generated from the java source file BreakIterator.java
// *****************************************************************************
#include "unicode/utypes.h"
#if !UCONFIG_NO_BREAK_ITERATION
#include "unicode/dbbi.h"
#include "unicode/brkiter.h"
#include "unicode/udata.h"
#include "unicode/resbund.h"
#include "cstring.h"
#include "mutex.h"
#include "iculserv.h"
#include "locbased.h"
// *****************************************************************************
// class BreakIterator
// This class implements methods for finding the location of boundaries in text.
// Instances of BreakIterator maintain a current position and scan over text
// returning the index of characters where boundaries occur.
// *****************************************************************************
U_NAMESPACE_BEGIN
const int32_t BreakIterator::DONE = (int32_t)-1;
// -------------------------------------
// Creates a break iterator for word breaks.
BreakIterator*
BreakIterator::createWordInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_WORD, status);
}
BreakIterator*
BreakIterator::makeWordInstance(const Locale& key, UErrorCode& status)
{
// WARNING: This routine is currently written specifically to handle only the
// default rules files and the alternate rules files for Thai. This function
// will have to be made fully general at some time in the future!
BreakIterator* result = NULL;
const char* filename = "word";
if (U_FAILURE(status))
return NULL;
if (!uprv_strcmp(key.getLanguage(), "th"))
{
filename = "word_th";
}
UDataMemory* file = udata_open(NULL, "brk", filename, &status);
if (U_FAILURE(status)) {
return NULL;
}
// The UDataMemory is adopted by the break iterator.
if(!uprv_strcmp(filename, "word_th")) {
filename = "thaidict.brk";
result = new DictionaryBasedBreakIterator(file, filename, status);
}
else {
result = new RuleBasedBreakIterator(file, status);
}
if (U_FAILURE(status)) { // Sometimes redundant check, but simple.
if (result != NULL) {
delete result;
}
return NULL;
}
if (result == NULL) {
udata_close(file);
status = U_MEMORY_ALLOCATION_ERROR;
}
return result;
}
// -------------------------------------
// Creates a break iterator for line breaks.
BreakIterator*
BreakIterator::createLineInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_LINE, status);
}
BreakIterator*
BreakIterator::makeLineInstance(const Locale& key, UErrorCode& status)
{
// WARNING: This routine is currently written specifically to handle only the
// default rules files and the alternate rules files for Thai. This function
// will have to be made fully general at some time in the future!
BreakIterator* result = NULL;
const char* filename = "line";
if (U_FAILURE(status))
return NULL;
if (!uprv_strcmp(key.getLanguage(), "th"))
{
filename = "line_th";
}
UDataMemory* file = udata_open(NULL, "brk", filename, &status);
if (U_FAILURE(status)) {
return NULL;
}
// The UDataMemory is adopted by the break iterator.
if (!uprv_strcmp(key.getLanguage(), "th")) {
filename = "thaidict.brk";
result = new DictionaryBasedBreakIterator(file, filename, status);
}
else {
result = new RuleBasedBreakIterator(file, status);
}
if (U_FAILURE(status)) { // Sometimes redundant check, but simple.
if (result != NULL) {
delete result;
}
return NULL;
}
if (result == NULL) {
udata_close(file);
status = U_MEMORY_ALLOCATION_ERROR;
}
return result;
}
// -------------------------------------
// Creates a break iterator for character breaks.
BreakIterator*
BreakIterator::createCharacterInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_CHARACTER, status);
}
BreakIterator*
BreakIterator::makeCharacterInstance(const Locale& /* key */, UErrorCode& status)
{
// WARNING: This routine is currently written specifically to handle only the
// default rules files and the alternate rules files for Thai. This function
// will have to be made fully general at some time in the future!
BreakIterator* result = NULL;
static const char filename[] = "char";
if (U_FAILURE(status))
return NULL;
UDataMemory* file = udata_open(NULL, "brk", filename, &status);
if (U_FAILURE(status)) {
return NULL;
}
// The UDataMemory is adopted by the break iterator.
result = new RuleBasedBreakIterator(file, status);
if (U_FAILURE(status)) { // Sometimes redundant check, but simple.
if (result != NULL) {
delete result;
}
return NULL;
}
if (result == NULL) {
udata_close(file);
status = U_MEMORY_ALLOCATION_ERROR;
}
return result;
}
// -------------------------------------
// Creates a break iterator for sentence breaks.
BreakIterator*
BreakIterator::createSentenceInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_SENTENCE, status);
}
BreakIterator*
BreakIterator::makeSentenceInstance(const Locale& /*key */, UErrorCode& status)
{
// WARNING: This routine is currently written specifically to handle only the
// default rules files and the alternate rules files for Thai. This function
// will have to be made fully general at some time in the future!
BreakIterator* result = NULL;
static const char filename[] = "sent";
if (U_FAILURE(status))
return NULL;
UDataMemory* file = udata_open(NULL, "brk", filename, &status);
if (U_FAILURE(status)) {
return NULL;
}
// The UDataMemory is adopted by the break iterator.
result = new RuleBasedBreakIterator(file, status);
if (U_FAILURE(status)) { // Sometimes redundant check, but simple.
if (result != NULL) {
delete result;
}
return NULL;
}
if (result == NULL) {
udata_close(file);
status = U_MEMORY_ALLOCATION_ERROR;
}
return result;
}
// -------------------------------------
// Creates a break iterator for title casing breaks.
BreakIterator*
BreakIterator::createTitleInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_TITLE, status);
}
BreakIterator*
BreakIterator::makeTitleInstance(const Locale& /* key */, UErrorCode& status)
{
// WARNING: This routine is currently written specifically to handle only the
// default rules files. This function will have to be made fully general
// at some time in the future!
BreakIterator* result = NULL;
static const char filename[] = "title";
if (U_FAILURE(status))
return NULL;
UDataMemory* file = udata_open(NULL, "brk", filename, &status);
if (U_FAILURE(status)) {
return NULL;
}
// The UDataMemory is adopted by the break iterator.
result = new RuleBasedBreakIterator(file, status);
if (U_FAILURE(status)) { // Sometimes redundant check, but simple.
if (result != NULL) {
delete result;
}
return NULL;
}
if (result == NULL) {
udata_close(file);
status = U_MEMORY_ALLOCATION_ERROR;
}
return result;
}
// -------------------------------------
// Gets all the available locales that has localized text boundary data.
const Locale*
BreakIterator::getAvailableLocales(int32_t& count)
{
return Locale::getAvailableLocales(count);
}
// -------------------------------------
// Gets the objectLocale display name in the default locale language.
UnicodeString&
BreakIterator::getDisplayName(const Locale& objectLocale,
UnicodeString& name)
{
return objectLocale.getDisplayName(name);
}
// -------------------------------------
// Gets the objectLocale display name in the displayLocale language.
UnicodeString&
BreakIterator::getDisplayName(const Locale& objectLocale,
const Locale& displayLocale,
UnicodeString& name)
{
return objectLocale.getDisplayName(displayLocale, name);
}
// ------------------------------------------
//
// Default constructor and destructor
//
//-------------------------------------------
BreakIterator::BreakIterator()
{
fBufferClone = FALSE;
*validLocale = *actualLocale = 0;
}
BreakIterator::~BreakIterator()
{
}
// ------------------------------------------
//
// Registration
//
//-------------------------------------------
static ICULocaleService* gService = NULL;
// -------------------------------------
class ICUBreakIteratorFactory : public ICUResourceBundleFactory {
protected:
virtual UObject* handleCreate(const Locale& loc, int32_t kind, const ICUService* /*service*/, UErrorCode& status) const {
return BreakIterator::makeInstance(loc, kind, status);
}
};
// -------------------------------------
class ICUBreakIteratorService : public ICULocaleService {
public:
ICUBreakIteratorService()
: ICULocaleService("Break Iterator")
{
UErrorCode status = U_ZERO_ERROR;
registerFactory(new ICUBreakIteratorFactory(), status);
}
virtual UObject* cloneInstance(UObject* instance) const {
return ((BreakIterator*)instance)->clone();
}
virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /*actualID*/, UErrorCode& status) const {
LocaleKey& lkey = (LocaleKey&)key;
int32_t kind = lkey.kind();
Locale loc;
lkey.currentLocale(loc);
return BreakIterator::makeInstance(loc, kind, status);
}
virtual UBool isDefault() const {
return countFactories() == 1;
}
};
// -------------------------------------
static ICULocaleService*
getService(void)
{
UBool needsInit;
umtx_lock(NULL);
needsInit = (UBool)(gService == NULL);
umtx_unlock(NULL);
if (needsInit) {
ICULocaleService *tService = new ICUBreakIteratorService();
umtx_lock(NULL);
if (gService == NULL) {
gService = tService;
tService = NULL;
}
umtx_unlock(NULL);
delete tService;
}
return gService;
}
// -------------------------------------
static UBool
hasService(void)
{
Mutex mutex;
return gService != NULL;
}
// -------------------------------------
BreakIterator*
BreakIterator::createInstance(const Locale& loc, UBreakIteratorType kind, UErrorCode& status)
{
if (U_FAILURE(status)) {
return NULL;
}
u_init(&status);
if (hasService()) {
Locale actualLoc;
BreakIterator *result = (BreakIterator*)gService->get(loc, kind, &actualLoc, status);
// TODO: The way the service code works in ICU 2.8 is that if
// there is a real registered break iterator, the actualLoc
// will be populated, but if the handleDefault path is taken
// (because nothing is registered that can handle the
// requested locale) then the actualLoc comes back empty. In
// that case, the returned object already has its actual/valid
// locale data populated (by makeInstance, which is what
// handleDefault calls), so we don't touch it. YES, A COMMENT
// THIS LONG is a sign of bad code -- so the action item is to
// revisit this in ICU 3.0 and clean it up/fix it/remove it.
if (*actualLoc.getName() != 0) {
U_LOCALE_BASED(locBased, *result);
locBased.setLocaleIDs(actualLoc.getName(), actualLoc.getName());
}
return result;
} else {
return makeInstance(loc, kind, status);
}
}
// -------------------------------------
URegistryKey
BreakIterator::registerInstance(BreakIterator* toAdopt, const Locale& locale, UBreakIteratorType kind, UErrorCode& status)
{
return getService()->registerInstance(toAdopt, locale, kind, status);
}
// -------------------------------------
UBool
BreakIterator::unregister(URegistryKey key, UErrorCode& status)
{
if (U_SUCCESS(status)) {
if (hasService()) {
return gService->unregister(key, status);
}
status = U_ILLEGAL_ARGUMENT_ERROR;
}
return FALSE;
}
// -------------------------------------
StringEnumeration*
BreakIterator::getAvailableLocales(void)
{
return getService()->getAvailableLocales();
}
// -------------------------------------
BreakIterator*
BreakIterator::makeInstance(const Locale& loc, int32_t kind, UErrorCode& status)
{
if (U_FAILURE(status)) {
return NULL;
}
BreakIterator *result = NULL;
switch (kind) {
case UBRK_CHARACTER:
result = BreakIterator::makeCharacterInstance(loc, status);
break;
case UBRK_WORD:
result = BreakIterator::makeWordInstance(loc, status);
break;
case UBRK_LINE:
result = BreakIterator::makeLineInstance(loc, status);
break;
case UBRK_SENTENCE:
result = BreakIterator::makeSentenceInstance(loc, status);
break;
case UBRK_TITLE:
result = BreakIterator::makeTitleInstance(loc, status);
break;
default:
status = U_ILLEGAL_ARGUMENT_ERROR;
}
if (U_FAILURE(status)) {
return NULL;
}
// this is more of a placeholder. All the break iterators have the same actual locale: root
// except the Thai one
ResourceBundle res(NULL, loc, status);
U_LOCALE_BASED(locBased, *result);
locBased.setLocaleIDs(res.getLocale(ULOC_VALID_LOCALE, status).getName(),
(uprv_strcmp(loc.getLanguage(), "th") == 0) ?
"th" : "root");
return result;
}
Locale
BreakIterator::getLocale(ULocDataLocaleType type, UErrorCode& status) const {
U_LOCALE_BASED(locBased, *this);
return locBased.getLocale(type, status);
}
const char *
BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
U_LOCALE_BASED(locBased, *this);
return locBased.getLocaleID(type, status);
}
U_NAMESPACE_END
// defined in ucln_cmn.h
/**
* Release all static memory held by breakiterator.
*/
U_CFUNC UBool breakiterator_cleanup(void) {
if (gService) {
delete gService;
gService = NULL;
}
return TRUE;
}
#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
//eof
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