forked from mirrors/gecko-dev
527 lines
15 KiB
C++
527 lines
15 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 1997-2015, International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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* File brkiter.cpp
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*
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* Modification History:
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*
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* Date Name Description
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* 02/18/97 aliu Converted from OpenClass. Added DONE.
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* 01/13/2000 helena Added UErrorCode parameter to createXXXInstance methods.
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*****************************************************************************************
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*/
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// *****************************************************************************
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// This file was generated from the java source file BreakIterator.java
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// *****************************************************************************
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_BREAK_ITERATION
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#include "unicode/rbbi.h"
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#include "unicode/brkiter.h"
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#include "unicode/udata.h"
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#include "unicode/ures.h"
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#include "unicode/ustring.h"
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#include "unicode/filteredbrk.h"
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#include "ucln_cmn.h"
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#include "cstring.h"
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#include "umutex.h"
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#include "servloc.h"
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#include "locbased.h"
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#include "uresimp.h"
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#include "uassert.h"
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#include "ubrkimpl.h"
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#include "utracimp.h"
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#include "charstr.h"
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// *****************************************************************************
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// class BreakIterator
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// This class implements methods for finding the location of boundaries in text.
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// Instances of BreakIterator maintain a current position and scan over text
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// returning the index of characters where boundaries occur.
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// *****************************************************************************
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U_NAMESPACE_BEGIN
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// -------------------------------------
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BreakIterator*
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BreakIterator::buildInstance(const Locale& loc, const char *type, UErrorCode &status)
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{
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char fnbuff[256];
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char ext[4]={'\0'};
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CharString actualLocale;
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int32_t size;
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const UChar* brkfname = NULL;
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UResourceBundle brkRulesStack;
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UResourceBundle brkNameStack;
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UResourceBundle *brkRules = &brkRulesStack;
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UResourceBundle *brkName = &brkNameStack;
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RuleBasedBreakIterator *result = NULL;
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if (U_FAILURE(status))
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return NULL;
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ures_initStackObject(brkRules);
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ures_initStackObject(brkName);
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// Get the locale
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UResourceBundle *b = ures_openNoDefault(U_ICUDATA_BRKITR, loc.getName(), &status);
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// Get the "boundaries" array.
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if (U_SUCCESS(status)) {
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brkRules = ures_getByKeyWithFallback(b, "boundaries", brkRules, &status);
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// Get the string object naming the rules file
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brkName = ures_getByKeyWithFallback(brkRules, type, brkName, &status);
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// Get the actual string
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brkfname = ures_getString(brkName, &size, &status);
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U_ASSERT((size_t)size<sizeof(fnbuff));
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if ((size_t)size>=sizeof(fnbuff)) {
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size=0;
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if (U_SUCCESS(status)) {
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status = U_BUFFER_OVERFLOW_ERROR;
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}
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}
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// Use the string if we found it
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if (U_SUCCESS(status) && brkfname) {
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actualLocale.append(ures_getLocaleInternal(brkName, &status), -1, status);
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UChar* extStart=u_strchr(brkfname, 0x002e);
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int len = 0;
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if(extStart!=NULL){
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len = (int)(extStart-brkfname);
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u_UCharsToChars(extStart+1, ext, sizeof(ext)); // nul terminates the buff
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u_UCharsToChars(brkfname, fnbuff, len);
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}
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fnbuff[len]=0; // nul terminate
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}
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}
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ures_close(brkRules);
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ures_close(brkName);
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UDataMemory* file = udata_open(U_ICUDATA_BRKITR, ext, fnbuff, &status);
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if (U_FAILURE(status)) {
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ures_close(b);
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return NULL;
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}
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// Create a RuleBasedBreakIterator
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result = new RuleBasedBreakIterator(file, status);
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// If there is a result, set the valid locale and actual locale, and the kind
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if (U_SUCCESS(status) && result != NULL) {
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U_LOCALE_BASED(locBased, *(BreakIterator*)result);
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locBased.setLocaleIDs(ures_getLocaleByType(b, ULOC_VALID_LOCALE, &status),
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actualLocale.data());
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}
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ures_close(b);
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if (U_FAILURE(status) && result != NULL) { // Sometimes redundant check, but simple
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delete result;
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return NULL;
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}
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if (result == NULL) {
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udata_close(file);
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if (U_SUCCESS(status)) {
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status = U_MEMORY_ALLOCATION_ERROR;
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}
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}
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return result;
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}
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// Creates a break iterator for word breaks.
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BreakIterator* U_EXPORT2
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BreakIterator::createWordInstance(const Locale& key, UErrorCode& status)
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{
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return createInstance(key, UBRK_WORD, status);
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}
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// -------------------------------------
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// Creates a break iterator for line breaks.
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BreakIterator* U_EXPORT2
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BreakIterator::createLineInstance(const Locale& key, UErrorCode& status)
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{
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return createInstance(key, UBRK_LINE, status);
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}
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// -------------------------------------
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// Creates a break iterator for character breaks.
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BreakIterator* U_EXPORT2
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BreakIterator::createCharacterInstance(const Locale& key, UErrorCode& status)
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{
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return createInstance(key, UBRK_CHARACTER, status);
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}
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// -------------------------------------
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// Creates a break iterator for sentence breaks.
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BreakIterator* U_EXPORT2
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BreakIterator::createSentenceInstance(const Locale& key, UErrorCode& status)
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{
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return createInstance(key, UBRK_SENTENCE, status);
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}
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// -------------------------------------
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// Creates a break iterator for title casing breaks.
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BreakIterator* U_EXPORT2
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BreakIterator::createTitleInstance(const Locale& key, UErrorCode& status)
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{
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return createInstance(key, UBRK_TITLE, status);
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}
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// -------------------------------------
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// Gets all the available locales that has localized text boundary data.
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const Locale* U_EXPORT2
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BreakIterator::getAvailableLocales(int32_t& count)
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{
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return Locale::getAvailableLocales(count);
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}
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// ------------------------------------------
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//
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// Constructors, destructor and assignment operator
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//
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//-------------------------------------------
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BreakIterator::BreakIterator()
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{
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*validLocale = *actualLocale = 0;
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}
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BreakIterator::BreakIterator(const BreakIterator &other) : UObject(other) {
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uprv_strncpy(actualLocale, other.actualLocale, sizeof(actualLocale));
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uprv_strncpy(validLocale, other.validLocale, sizeof(validLocale));
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}
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BreakIterator &BreakIterator::operator =(const BreakIterator &other) {
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if (this != &other) {
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uprv_strncpy(actualLocale, other.actualLocale, sizeof(actualLocale));
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uprv_strncpy(validLocale, other.validLocale, sizeof(validLocale));
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}
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return *this;
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}
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BreakIterator::~BreakIterator()
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{
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}
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// ------------------------------------------
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//
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// Registration
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//
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//-------------------------------------------
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#if !UCONFIG_NO_SERVICE
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// -------------------------------------
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class ICUBreakIteratorFactory : public ICUResourceBundleFactory {
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public:
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virtual ~ICUBreakIteratorFactory();
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protected:
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virtual UObject* handleCreate(const Locale& loc, int32_t kind, const ICUService* /*service*/, UErrorCode& status) const {
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return BreakIterator::makeInstance(loc, kind, status);
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}
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};
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ICUBreakIteratorFactory::~ICUBreakIteratorFactory() {}
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// -------------------------------------
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class ICUBreakIteratorService : public ICULocaleService {
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public:
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ICUBreakIteratorService()
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: ICULocaleService(UNICODE_STRING("Break Iterator", 14))
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{
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UErrorCode status = U_ZERO_ERROR;
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registerFactory(new ICUBreakIteratorFactory(), status);
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}
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virtual ~ICUBreakIteratorService();
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virtual UObject* cloneInstance(UObject* instance) const {
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return ((BreakIterator*)instance)->clone();
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}
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virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /*actualID*/, UErrorCode& status) const {
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LocaleKey& lkey = (LocaleKey&)key;
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int32_t kind = lkey.kind();
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Locale loc;
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lkey.currentLocale(loc);
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return BreakIterator::makeInstance(loc, kind, status);
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}
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virtual UBool isDefault() const {
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return countFactories() == 1;
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}
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};
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ICUBreakIteratorService::~ICUBreakIteratorService() {}
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// -------------------------------------
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// defined in ucln_cmn.h
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U_NAMESPACE_END
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static icu::UInitOnce gInitOnceBrkiter = U_INITONCE_INITIALIZER;
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static icu::ICULocaleService* gService = NULL;
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/**
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* Release all static memory held by breakiterator.
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*/
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U_CDECL_BEGIN
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static UBool U_CALLCONV breakiterator_cleanup(void) {
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#if !UCONFIG_NO_SERVICE
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if (gService) {
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delete gService;
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gService = NULL;
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}
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gInitOnceBrkiter.reset();
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#endif
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return TRUE;
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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static void U_CALLCONV
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initService(void) {
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gService = new ICUBreakIteratorService();
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ucln_common_registerCleanup(UCLN_COMMON_BREAKITERATOR, breakiterator_cleanup);
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}
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static ICULocaleService*
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getService(void)
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{
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umtx_initOnce(gInitOnceBrkiter, &initService);
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return gService;
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}
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// -------------------------------------
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static inline UBool
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hasService(void)
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{
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return !gInitOnceBrkiter.isReset() && getService() != NULL;
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}
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// -------------------------------------
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URegistryKey U_EXPORT2
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BreakIterator::registerInstance(BreakIterator* toAdopt, const Locale& locale, UBreakIteratorType kind, UErrorCode& status)
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{
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ICULocaleService *service = getService();
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if (service == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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return service->registerInstance(toAdopt, locale, kind, status);
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}
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// -------------------------------------
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UBool U_EXPORT2
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BreakIterator::unregister(URegistryKey key, UErrorCode& status)
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{
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if (U_SUCCESS(status)) {
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if (hasService()) {
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return gService->unregister(key, status);
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}
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status = U_MEMORY_ALLOCATION_ERROR;
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}
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return FALSE;
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}
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// -------------------------------------
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StringEnumeration* U_EXPORT2
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BreakIterator::getAvailableLocales(void)
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{
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ICULocaleService *service = getService();
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if (service == NULL) {
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return NULL;
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}
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return service->getAvailableLocales();
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}
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#endif /* UCONFIG_NO_SERVICE */
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// -------------------------------------
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BreakIterator*
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BreakIterator::createInstance(const Locale& loc, int32_t kind, UErrorCode& status)
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{
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if (U_FAILURE(status)) {
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return NULL;
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}
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#if !UCONFIG_NO_SERVICE
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if (hasService()) {
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Locale actualLoc("");
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BreakIterator *result = (BreakIterator*)gService->get(loc, kind, &actualLoc, status);
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// TODO: The way the service code works in ICU 2.8 is that if
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// there is a real registered break iterator, the actualLoc
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// will be populated, but if the handleDefault path is taken
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// (because nothing is registered that can handle the
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// requested locale) then the actualLoc comes back empty. In
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// that case, the returned object already has its actual/valid
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// locale data populated (by makeInstance, which is what
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// handleDefault calls), so we don't touch it. YES, A COMMENT
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// THIS LONG is a sign of bad code -- so the action item is to
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// revisit this in ICU 3.0 and clean it up/fix it/remove it.
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if (U_SUCCESS(status) && (result != NULL) && *actualLoc.getName() != 0) {
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U_LOCALE_BASED(locBased, *result);
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locBased.setLocaleIDs(actualLoc.getName(), actualLoc.getName());
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}
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return result;
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}
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else
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#endif
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{
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return makeInstance(loc, kind, status);
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}
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}
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// -------------------------------------
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enum { kKeyValueLenMax = 32 };
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BreakIterator*
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BreakIterator::makeInstance(const Locale& loc, int32_t kind, UErrorCode& status)
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{
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if (U_FAILURE(status)) {
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return NULL;
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}
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char lbType[kKeyValueLenMax];
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BreakIterator *result = NULL;
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switch (kind) {
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case UBRK_CHARACTER:
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{
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UTRACE_ENTRY(UTRACE_UBRK_CREATE_CHARACTER);
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result = BreakIterator::buildInstance(loc, "grapheme", status);
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UTRACE_EXIT_STATUS(status);
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}
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break;
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case UBRK_WORD:
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{
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UTRACE_ENTRY(UTRACE_UBRK_CREATE_WORD);
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result = BreakIterator::buildInstance(loc, "word", status);
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UTRACE_EXIT_STATUS(status);
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}
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break;
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case UBRK_LINE:
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{
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UTRACE_ENTRY(UTRACE_UBRK_CREATE_LINE);
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uprv_strcpy(lbType, "line");
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char lbKeyValue[kKeyValueLenMax] = {0};
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UErrorCode kvStatus = U_ZERO_ERROR;
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int32_t kLen = loc.getKeywordValue("lb", lbKeyValue, kKeyValueLenMax, kvStatus);
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if (U_SUCCESS(kvStatus) && kLen > 0 && (uprv_strcmp(lbKeyValue,"strict")==0 || uprv_strcmp(lbKeyValue,"normal")==0 || uprv_strcmp(lbKeyValue,"loose")==0)) {
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uprv_strcat(lbType, "_");
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uprv_strcat(lbType, lbKeyValue);
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}
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result = BreakIterator::buildInstance(loc, lbType, status);
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UTRACE_DATA1(UTRACE_INFO, "lb=%s", lbKeyValue);
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UTRACE_EXIT_STATUS(status);
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}
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break;
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case UBRK_SENTENCE:
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{
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UTRACE_ENTRY(UTRACE_UBRK_CREATE_SENTENCE);
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result = BreakIterator::buildInstance(loc, "sentence", status);
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#if !UCONFIG_NO_FILTERED_BREAK_ITERATION
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char ssKeyValue[kKeyValueLenMax] = {0};
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UErrorCode kvStatus = U_ZERO_ERROR;
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int32_t kLen = loc.getKeywordValue("ss", ssKeyValue, kKeyValueLenMax, kvStatus);
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if (U_SUCCESS(kvStatus) && kLen > 0 && uprv_strcmp(ssKeyValue,"standard")==0) {
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FilteredBreakIteratorBuilder* fbiBuilder = FilteredBreakIteratorBuilder::createInstance(loc, kvStatus);
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if (U_SUCCESS(kvStatus)) {
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result = fbiBuilder->build(result, status);
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delete fbiBuilder;
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}
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}
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#endif
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UTRACE_EXIT_STATUS(status);
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}
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break;
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case UBRK_TITLE:
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{
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UTRACE_ENTRY(UTRACE_UBRK_CREATE_TITLE);
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result = BreakIterator::buildInstance(loc, "title", status);
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UTRACE_EXIT_STATUS(status);
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}
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break;
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default:
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status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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if (U_FAILURE(status)) {
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return NULL;
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}
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return result;
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}
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Locale
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BreakIterator::getLocale(ULocDataLocaleType type, UErrorCode& status) const {
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U_LOCALE_BASED(locBased, *this);
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return locBased.getLocale(type, status);
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}
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const char *
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BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
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U_LOCALE_BASED(locBased, *this);
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return locBased.getLocaleID(type, status);
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}
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// This implementation of getRuleStatus is a do-nothing stub, here to
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// provide a default implementation for any derived BreakIterator classes that
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// do not implement it themselves.
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int32_t BreakIterator::getRuleStatus() const {
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return 0;
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}
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// This implementation of getRuleStatusVec is a do-nothing stub, here to
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// provide a default implementation for any derived BreakIterator classes that
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// do not implement it themselves.
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int32_t BreakIterator::getRuleStatusVec(int32_t *fillInVec, int32_t capacity, UErrorCode &status) {
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if (U_FAILURE(status)) {
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return 0;
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}
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if (capacity < 1) {
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status = U_BUFFER_OVERFLOW_ERROR;
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return 1;
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}
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*fillInVec = 0;
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return 1;
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}
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BreakIterator::BreakIterator (const Locale& valid, const Locale& actual) {
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U_LOCALE_BASED(locBased, (*this));
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locBased.setLocaleIDs(valid, actual);
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}
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
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//eof
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