godotengine
/
godot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
godot/thirdparty/icu4c/common/brkiter.cpp

548 lines
16 KiB
C++
Raw Blame History

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 1997-2015, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
* File brkiter.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/rbbi.h"
#include "unicode/brkiter.h"
#include "unicode/udata.h"
#include "unicode/uloc.h"
#include "unicode/ures.h"
#include "unicode/ustring.h"
#include "unicode/filteredbrk.h"
#include "bytesinkutil.h"
#include "ucln_cmn.h"
#include "cstring.h"
#include "umutex.h"
#include "servloc.h"
#include "locbased.h"
#include "uresimp.h"
#include "uassert.h"
#include "ubrkimpl.h"
#include "utracimp.h"
#include "charstr.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
// -------------------------------------
BreakIterator*
BreakIterator::buildInstance(const Locale& loc, const char *type, UErrorCode &status)
{
char fnbuff[256];
char ext[4]={'\0'};
CharString actualLocale;
int32_t size;
const char16_t* brkfname = nullptr;
UResourceBundle brkRulesStack;
UResourceBundle brkNameStack;
UResourceBundle *brkRules = &brkRulesStack;
UResourceBundle *brkName = &brkNameStack;
RuleBasedBreakIterator *result = nullptr;
if (U_FAILURE(status))
return nullptr;
ures_initStackObject(brkRules);
ures_initStackObject(brkName);
// Get the locale
UResourceBundle *b = ures_openNoDefault(U_ICUDATA_BRKITR, loc.getName(), &status);
// Get the "boundaries" array.
if (U_SUCCESS(status)) {
brkRules = ures_getByKeyWithFallback(b, "boundaries", brkRules, &status);
// Get the string object naming the rules file
brkName = ures_getByKeyWithFallback(brkRules, type, brkName, &status);
// Get the actual string
brkfname = ures_getString(brkName, &size, &status);
U_ASSERT((size_t)size<sizeof(fnbuff));
if ((size_t)size>=sizeof(fnbuff)) {
size=0;
if (U_SUCCESS(status)) {
status = U_BUFFER_OVERFLOW_ERROR;
}
}
// Use the string if we found it
if (U_SUCCESS(status) && brkfname) {
actualLocale.append(ures_getLocaleInternal(brkName, &status), -1, status);
char16_t* extStart=u_strchr(brkfname, 0x002e);
int len = 0;
if (extStart != nullptr){
len = (int)(extStart-brkfname);
u_UCharsToChars(extStart+1, ext, sizeof(ext)); // nul terminates the buff
u_UCharsToChars(brkfname, fnbuff, len);
}
fnbuff[len]=0; // nul terminate
}
}
ures_close(brkRules);
ures_close(brkName);
UDataMemory* file = udata_open(U_ICUDATA_BRKITR, ext, fnbuff, &status);
if (U_FAILURE(status)) {
ures_close(b);
return nullptr;
}
// Create a RuleBasedBreakIterator
result = new RuleBasedBreakIterator(file, uprv_strstr(type, "phrase") != nullptr, status);
// If there is a result, set the valid locale and actual locale, and the kind
if (U_SUCCESS(status) && result != nullptr) {
U_LOCALE_BASED(locBased, *(BreakIterator*)result);
locBased.setLocaleIDs(ures_getLocaleByType(b, ULOC_VALID_LOCALE, &status),
actualLocale.data());
uprv_strncpy(result->requestLocale, loc.getName(), ULOC_FULLNAME_CAPACITY);
result->requestLocale[ULOC_FULLNAME_CAPACITY-1] = 0; // always terminate
}
ures_close(b);
if (U_FAILURE(status) && result != nullptr) { // Sometimes redundant check, but simple
delete result;
return nullptr;
}
if (result == nullptr) {
udata_close(file);
if (U_SUCCESS(status)) {
status = U_MEMORY_ALLOCATION_ERROR;
}
}
return result;
}
// Creates a break iterator for word breaks.
BreakIterator* U_EXPORT2
BreakIterator::createWordInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_WORD, status);
}
// -------------------------------------
// Creates a break iterator for line breaks.
BreakIterator* U_EXPORT2
BreakIterator::createLineInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_LINE, status);
}
// -------------------------------------
// Creates a break iterator for character breaks.
BreakIterator* U_EXPORT2
BreakIterator::createCharacterInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_CHARACTER, status);
}
// -------------------------------------
// Creates a break iterator for sentence breaks.
BreakIterator* U_EXPORT2
BreakIterator::createSentenceInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_SENTENCE, status);
}
// -------------------------------------
// Creates a break iterator for title casing breaks.
BreakIterator* U_EXPORT2
BreakIterator::createTitleInstance(const Locale& key, UErrorCode& status)
{
return createInstance(key, UBRK_TITLE, status);
}
// -------------------------------------
// Gets all the available locales that has localized text boundary data.
const Locale* U_EXPORT2
BreakIterator::getAvailableLocales(int32_t& count)
{
return Locale::getAvailableLocales(count);
}
// ------------------------------------------
//
// Constructors, destructor and assignment operator
//
//-------------------------------------------
BreakIterator::BreakIterator()
{
*validLocale = *actualLocale = *requestLocale = 0;
}
BreakIterator::BreakIterator(const BreakIterator &other) : UObject(other) {
uprv_strncpy(actualLocale, other.actualLocale, sizeof(actualLocale));
uprv_strncpy(validLocale, other.validLocale, sizeof(validLocale));
uprv_strncpy(requestLocale, other.requestLocale, sizeof(requestLocale));
}
BreakIterator &BreakIterator::operator =(const BreakIterator &other) {
if (this != &other) {
uprv_strncpy(actualLocale, other.actualLocale, sizeof(actualLocale));
uprv_strncpy(validLocale, other.validLocale, sizeof(validLocale));
uprv_strncpy(requestLocale, other.requestLocale, sizeof(requestLocale));
}
return *this;
}
BreakIterator::~BreakIterator()
{
}
// ------------------------------------------
//
// Registration
//
//-------------------------------------------
#if !UCONFIG_NO_SERVICE
// -------------------------------------
class ICUBreakIteratorFactory : public ICUResourceBundleFactory {
public:
virtual ~ICUBreakIteratorFactory();
protected:
virtual UObject* handleCreate(const Locale& loc, int32_t kind, const ICUService* /*service*/, UErrorCode& status) const override {
return BreakIterator::makeInstance(loc, kind, status);
}
};
ICUBreakIteratorFactory::~ICUBreakIteratorFactory() {}
// -------------------------------------
class ICUBreakIteratorService : public ICULocaleService {
public:
ICUBreakIteratorService()
: ICULocaleService(UNICODE_STRING("Break Iterator", 14))
{
UErrorCode status = U_ZERO_ERROR;
registerFactory(new ICUBreakIteratorFactory(), status);
}
virtual ~ICUBreakIteratorService();
virtual UObject* cloneInstance(UObject* instance) const override {
return ((BreakIterator*)instance)->clone();
}
virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /*actualID*/, UErrorCode& status) const override {
LocaleKey& lkey = static_cast<LocaleKey&>(const_cast<ICUServiceKey&>(key));
int32_t kind = lkey.kind();
Locale loc;
lkey.currentLocale(loc);
return BreakIterator::makeInstance(loc, kind, status);
}
virtual UBool isDefault() const override {
return countFactories() == 1;
}
};
ICUBreakIteratorService::~ICUBreakIteratorService() {}
// -------------------------------------
// defined in ucln_cmn.h
U_NAMESPACE_END
static icu::UInitOnce gInitOnceBrkiter {};
static icu::ICULocaleService* gService = nullptr;
/**
* Release all static memory held by breakiterator.
*/
U_CDECL_BEGIN
static UBool U_CALLCONV breakiterator_cleanup() {
#if !UCONFIG_NO_SERVICE
if (gService) {
delete gService;
gService = nullptr;
}
gInitOnceBrkiter.reset();
#endif
return true;
}
U_CDECL_END
U_NAMESPACE_BEGIN
static void U_CALLCONV
initService() {
gService = new ICUBreakIteratorService();
ucln_common_registerCleanup(UCLN_COMMON_BREAKITERATOR, breakiterator_cleanup);
}
static ICULocaleService*
getService()
{
umtx_initOnce(gInitOnceBrkiter, &initService);
return gService;
}
// -------------------------------------
static inline UBool
hasService()
{
return !gInitOnceBrkiter.isReset() && getService() != nullptr;
}
// -------------------------------------
URegistryKey U_EXPORT2
BreakIterator::registerInstance(BreakIterator* toAdopt, const Locale& locale, UBreakIteratorType kind, UErrorCode& status)
{
ICULocaleService *service = getService();
if (service == nullptr) {
status = U_MEMORY_ALLOCATION_ERROR;
return nullptr;
}
return service->registerInstance(toAdopt, locale, kind, status);
}
// -------------------------------------
UBool U_EXPORT2
BreakIterator::unregister(URegistryKey key, UErrorCode& status)
{
if (U_SUCCESS(status)) {
if (hasService()) {
return gService->unregister(key, status);
}
status = U_MEMORY_ALLOCATION_ERROR;
}
return false;
}
// -------------------------------------
StringEnumeration* U_EXPORT2
BreakIterator::getAvailableLocales()
{
ICULocaleService *service = getService();
if (service == nullptr) {
return nullptr;
}
return service->getAvailableLocales();
}
#endif /* UCONFIG_NO_SERVICE */
// -------------------------------------
BreakIterator*
BreakIterator::createInstance(const Locale& loc, int32_t kind, UErrorCode& status)
{
if (U_FAILURE(status)) {
return nullptr;
}
#if !UCONFIG_NO_SERVICE
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 (U_SUCCESS(status) && (result != nullptr) && *actualLoc.getName() != 0) {
U_LOCALE_BASED(locBased, *result);
locBased.setLocaleIDs(actualLoc.getName(), actualLoc.getName());
}
return result;
}
else
#endif
{
return makeInstance(loc, kind, status);
}
}
// -------------------------------------
enum { kKeyValueLenMax = 32 };
BreakIterator*
BreakIterator::makeInstance(const Locale& loc, int32_t kind, UErrorCode& status)
{
if (U_FAILURE(status)) {
return nullptr;
}
BreakIterator *result = nullptr;
switch (kind) {
case UBRK_CHARACTER:
{
UTRACE_ENTRY(UTRACE_UBRK_CREATE_CHARACTER);
result = BreakIterator::buildInstance(loc, "grapheme", status);
UTRACE_EXIT_STATUS(status);
}
break;
case UBRK_WORD:
{
UTRACE_ENTRY(UTRACE_UBRK_CREATE_WORD);
result = BreakIterator::buildInstance(loc, "word", status);
UTRACE_EXIT_STATUS(status);
}
break;
case UBRK_LINE:
{
char lb_lw[kKeyValueLenMax];
UTRACE_ENTRY(UTRACE_UBRK_CREATE_LINE);
uprv_strcpy(lb_lw, "line");
UErrorCode kvStatus = U_ZERO_ERROR;
auto value = loc.getKeywordValue<CharString>("lb", kvStatus);
if (U_SUCCESS(kvStatus) && (value == "strict" || value == "normal" || value == "loose")) {
uprv_strcat(lb_lw, "_");
uprv_strcat(lb_lw, value.data());
}
// lw=phrase is only supported in Japanese and Korean
if (uprv_strcmp(loc.getLanguage(), "ja") == 0 || uprv_strcmp(loc.getLanguage(), "ko") == 0) {
value = loc.getKeywordValue<CharString>("lw", kvStatus);
if (U_SUCCESS(kvStatus) && value == "phrase") {
uprv_strcat(lb_lw, "_");
uprv_strcat(lb_lw, value.data());
}
}
result = BreakIterator::buildInstance(loc, lb_lw, status);
UTRACE_DATA1(UTRACE_INFO, "lb_lw=%s", lb_lw);
UTRACE_EXIT_STATUS(status);
}
break;
case UBRK_SENTENCE:
{
UTRACE_ENTRY(UTRACE_UBRK_CREATE_SENTENCE);
result = BreakIterator::buildInstance(loc, "sentence", status);
#if !UCONFIG_NO_FILTERED_BREAK_ITERATION
char ssKeyValue[kKeyValueLenMax] = {0};
UErrorCode kvStatus = U_ZERO_ERROR;
int32_t kLen = loc.getKeywordValue("ss", ssKeyValue, kKeyValueLenMax, kvStatus);
if (U_SUCCESS(kvStatus) && kLen > 0 && uprv_strcmp(ssKeyValue,"standard")==0) {
FilteredBreakIteratorBuilder* fbiBuilder = FilteredBreakIteratorBuilder::createInstance(loc, kvStatus);
if (U_SUCCESS(kvStatus)) {
result = fbiBuilder->build(result, status);
delete fbiBuilder;
}
}
#endif
UTRACE_EXIT_STATUS(status);
}
break;
case UBRK_TITLE:
{
UTRACE_ENTRY(UTRACE_UBRK_CREATE_TITLE);
result = BreakIterator::buildInstance(loc, "title", status);
UTRACE_EXIT_STATUS(status);
}
break;
default:
status = U_ILLEGAL_ARGUMENT_ERROR;
}
if (U_FAILURE(status)) {
return nullptr;
}
return result;
}
Locale
BreakIterator::getLocale(ULocDataLocaleType type, UErrorCode& status) const {
if (type == ULOC_REQUESTED_LOCALE) {
return {requestLocale};
}
U_LOCALE_BASED(locBased, *this);
return locBased.getLocale(type, status);
}
const char *
BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
if (type == ULOC_REQUESTED_LOCALE) {
return requestLocale;
}
U_LOCALE_BASED(locBased, *this);
return locBased.getLocaleID(type, status);
}
// This implementation of getRuleStatus is a do-nothing stub, here to
// provide a default implementation for any derived BreakIterator classes that
// do not implement it themselves.
int32_t BreakIterator::getRuleStatus() const {
return 0;
}
// This implementation of getRuleStatusVec is a do-nothing stub, here to
// provide a default implementation for any derived BreakIterator classes that
// do not implement it themselves.
int32_t BreakIterator::getRuleStatusVec(int32_t *fillInVec, int32_t capacity, UErrorCode &status) {
if (U_FAILURE(status)) {
return 0;
}
if (capacity < 1) {
status = U_BUFFER_OVERFLOW_ERROR;
return 1;
}
*fillInVec = 0;
return 1;
}
BreakIterator::BreakIterator (const Locale& valid, const Locale& actual) {
U_LOCALE_BASED(locBased, (*this));
locBased.setLocaleIDs(valid, actual);
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
//eof
Reference in New Issue View Git Blame Copy Permalink