1 /*
2 *******************************************************************************
3 * Copyright (C) 1997-2010, International Business Machines Corporation and
4 * others. All Rights Reserved.
5 *******************************************************************************
6 *
7 * File TXTBDRY.CPP
8 *
9 * Modification History:
10 *
11 * Date Name Description
12 * 02/18/97 aliu Converted from OpenClass. Added DONE.
13 * 01/13/2000 helena Added UErrorCode parameter to createXXXInstance methods.
14 *****************************************************************************************
15 */
16
17 // *****************************************************************************
18 // This file was generated from the java source file BreakIterator.java
19 // *****************************************************************************
20
21 #include "unicode/utypes.h"
22
23 #if !UCONFIG_NO_BREAK_ITERATION
24
25 #include "unicode/rbbi.h"
26 #include "unicode/brkiter.h"
27 #include "unicode/udata.h"
28 #include "unicode/ures.h"
29 #include "unicode/ustring.h"
30 #include "ucln_cmn.h"
31 #include "cstring.h"
32 #include "umutex.h"
33 #include "servloc.h"
34 #include "locbased.h"
35 #include "uresimp.h"
36 #include "uassert.h"
37 #include "ubrkimpl.h"
38
39 // *****************************************************************************
40 // class BreakIterator
41 // This class implements methods for finding the location of boundaries in text.
42 // Instances of BreakIterator maintain a current position and scan over text
43 // returning the index of characters where boundaries occur.
44 // *****************************************************************************
45
46 U_NAMESPACE_BEGIN
47
48 // -------------------------------------
49
50 BreakIterator*
buildInstance(const Locale & loc,const char * type,int32_t kind,UErrorCode & status)51 BreakIterator::buildInstance(const Locale& loc, const char *type, int32_t kind, UErrorCode &status)
52 {
53 char fnbuff[256];
54 char ext[4]={'\0'};
55 char actualLocale[ULOC_FULLNAME_CAPACITY];
56 int32_t size;
57 const UChar* brkfname = NULL;
58 UResourceBundle brkRulesStack;
59 UResourceBundle brkNameStack;
60 UResourceBundle *brkRules = &brkRulesStack;
61 UResourceBundle *brkName = &brkNameStack;
62 RuleBasedBreakIterator *result = NULL;
63
64 if (U_FAILURE(status))
65 return NULL;
66
67 ures_initStackObject(brkRules);
68 ures_initStackObject(brkName);
69
70 // Get the locale
71 UResourceBundle *b = ures_open(U_ICUDATA_BRKITR, loc.getName(), &status);
72 /* this is a hack for now. Should be fixed when the data is fetched from
73 brk_index.txt */
74 if(status==U_USING_DEFAULT_WARNING){
75 status=U_ZERO_ERROR;
76 ures_openFillIn(b, U_ICUDATA_BRKITR, "", &status);
77 }
78
79 // Get the "boundaries" array.
80 if (U_SUCCESS(status)) {
81 brkRules = ures_getByKeyWithFallback(b, "boundaries", brkRules, &status);
82 // Get the string object naming the rules file
83 brkName = ures_getByKeyWithFallback(brkRules, type, brkName, &status);
84 // Get the actual string
85 brkfname = ures_getString(brkName, &size, &status);
86 U_ASSERT((size_t)size<sizeof(fnbuff));
87 if ((size_t)size>=sizeof(fnbuff)) {
88 size=0;
89 if (U_SUCCESS(status)) {
90 status = U_BUFFER_OVERFLOW_ERROR;
91 }
92 }
93
94 // Use the string if we found it
95 if (U_SUCCESS(status) && brkfname) {
96 uprv_strncpy(actualLocale,
97 ures_getLocale(brkName, &status),
98 sizeof(actualLocale)/sizeof(actualLocale[0]));
99
100 UChar* extStart=u_strchr(brkfname, 0x002e);
101 int len = 0;
102 if(extStart!=NULL){
103 len = (int)(extStart-brkfname);
104 u_UCharsToChars(extStart+1, ext, sizeof(ext)); // nul terminates the buff
105 u_UCharsToChars(brkfname, fnbuff, len);
106 }
107 fnbuff[len]=0; // nul terminate
108 }
109 }
110
111 ures_close(brkRules);
112 ures_close(brkName);
113
114 UDataMemory* file = udata_open(U_ICUDATA_BRKITR, ext, fnbuff, &status);
115 if (U_FAILURE(status)) {
116 ures_close(b);
117 return NULL;
118 }
119
120 // Create a RuleBasedBreakIterator
121 result = new RuleBasedBreakIterator(file, status);
122
123 // If there is a result, set the valid locale and actual locale, and the kind
124 if (U_SUCCESS(status) && result != NULL) {
125 U_LOCALE_BASED(locBased, *(BreakIterator*)result);
126 locBased.setLocaleIDs(ures_getLocaleByType(b, ULOC_VALID_LOCALE, &status), actualLocale);
127 result->setBreakType(kind);
128 }
129
130 ures_close(b);
131
132 if (U_FAILURE(status) && result != NULL) { // Sometimes redundant check, but simple
133 delete result;
134 return NULL;
135 }
136
137 if (result == NULL) {
138 udata_close(file);
139 if (U_SUCCESS(status)) {
140 status = U_MEMORY_ALLOCATION_ERROR;
141 }
142 }
143
144 return result;
145 }
146
147 // Creates a break iterator for word breaks.
148 BreakIterator* U_EXPORT2
createWordInstance(const Locale & key,UErrorCode & status)149 BreakIterator::createWordInstance(const Locale& key, UErrorCode& status)
150 {
151 return createInstance(key, UBRK_WORD, status);
152 }
153
154 // -------------------------------------
155
156 // Creates a break iterator for line breaks.
157 BreakIterator* U_EXPORT2
createLineInstance(const Locale & key,UErrorCode & status)158 BreakIterator::createLineInstance(const Locale& key, UErrorCode& status)
159 {
160 return createInstance(key, UBRK_LINE, status);
161 }
162
163 // -------------------------------------
164
165 // Creates a break iterator for character breaks.
166 BreakIterator* U_EXPORT2
createCharacterInstance(const Locale & key,UErrorCode & status)167 BreakIterator::createCharacterInstance(const Locale& key, UErrorCode& status)
168 {
169 return createInstance(key, UBRK_CHARACTER, status);
170 }
171
172 // -------------------------------------
173
174 // Creates a break iterator for sentence breaks.
175 BreakIterator* U_EXPORT2
createSentenceInstance(const Locale & key,UErrorCode & status)176 BreakIterator::createSentenceInstance(const Locale& key, UErrorCode& status)
177 {
178 return createInstance(key, UBRK_SENTENCE, status);
179 }
180
181 // -------------------------------------
182
183 // Creates a break iterator for title casing breaks.
184 BreakIterator* U_EXPORT2
createTitleInstance(const Locale & key,UErrorCode & status)185 BreakIterator::createTitleInstance(const Locale& key, UErrorCode& status)
186 {
187 return createInstance(key, UBRK_TITLE, status);
188 }
189
190 // -------------------------------------
191
192 // Gets all the available locales that has localized text boundary data.
193 const Locale* U_EXPORT2
getAvailableLocales(int32_t & count)194 BreakIterator::getAvailableLocales(int32_t& count)
195 {
196 return Locale::getAvailableLocales(count);
197 }
198
199 // ------------------------------------------
200 //
201 // Default constructor and destructor
202 //
203 //-------------------------------------------
204
BreakIterator()205 BreakIterator::BreakIterator()
206 {
207 fBufferClone = FALSE;
208 *validLocale = *actualLocale = 0;
209 }
210
~BreakIterator()211 BreakIterator::~BreakIterator()
212 {
213 }
214
215 // ------------------------------------------
216 //
217 // Registration
218 //
219 //-------------------------------------------
220 #if !UCONFIG_NO_SERVICE
221
222 // -------------------------------------
223
224 class ICUBreakIteratorFactory : public ICUResourceBundleFactory {
225 protected:
handleCreate(const Locale & loc,int32_t kind,const ICUService *,UErrorCode & status) const226 virtual UObject* handleCreate(const Locale& loc, int32_t kind, const ICUService* /*service*/, UErrorCode& status) const {
227 return BreakIterator::makeInstance(loc, kind, status);
228 }
229 };
230
231 // -------------------------------------
232
233 class ICUBreakIteratorService : public ICULocaleService {
234 public:
ICUBreakIteratorService()235 ICUBreakIteratorService()
236 : ICULocaleService(UNICODE_STRING("Break Iterator", 14))
237 {
238 UErrorCode status = U_ZERO_ERROR;
239 registerFactory(new ICUBreakIteratorFactory(), status);
240 }
241
cloneInstance(UObject * instance) const242 virtual UObject* cloneInstance(UObject* instance) const {
243 return ((BreakIterator*)instance)->clone();
244 }
245
handleDefault(const ICUServiceKey & key,UnicodeString *,UErrorCode & status) const246 virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /*actualID*/, UErrorCode& status) const {
247 LocaleKey& lkey = (LocaleKey&)key;
248 int32_t kind = lkey.kind();
249 Locale loc;
250 lkey.currentLocale(loc);
251 return BreakIterator::makeInstance(loc, kind, status);
252 }
253
isDefault() const254 virtual UBool isDefault() const {
255 return countFactories() == 1;
256 }
257 };
258
259 // -------------------------------------
260
261 U_NAMESPACE_END
262
263 // defined in ucln_cmn.h
264
265 static U_NAMESPACE_QUALIFIER ICULocaleService* gService = NULL;
266
267 /**
268 * Release all static memory held by breakiterator.
269 */
270 U_CDECL_BEGIN
breakiterator_cleanup(void)271 static UBool U_CALLCONV breakiterator_cleanup(void) {
272 #if !UCONFIG_NO_SERVICE
273 if (gService) {
274 delete gService;
275 gService = NULL;
276 }
277 #endif
278 return TRUE;
279 }
280 U_CDECL_END
281 U_NAMESPACE_BEGIN
282
283 static ICULocaleService*
getService(void)284 getService(void)
285 {
286 UBool needsInit;
287 UMTX_CHECK(NULL, (UBool)(gService == NULL), needsInit);
288
289 if (needsInit) {
290 ICULocaleService *tService = new ICUBreakIteratorService();
291 umtx_lock(NULL);
292 if (gService == NULL) {
293 gService = tService;
294 tService = NULL;
295 ucln_common_registerCleanup(UCLN_COMMON_BREAKITERATOR, breakiterator_cleanup);
296 }
297 umtx_unlock(NULL);
298 delete tService;
299 }
300 return gService;
301 }
302
303 // -------------------------------------
304
305 static inline UBool
hasService(void)306 hasService(void)
307 {
308 UBool retVal;
309 UMTX_CHECK(NULL, gService != NULL, retVal);
310 return retVal;
311 }
312
313 // -------------------------------------
314
315 URegistryKey U_EXPORT2
registerInstance(BreakIterator * toAdopt,const Locale & locale,UBreakIteratorType kind,UErrorCode & status)316 BreakIterator::registerInstance(BreakIterator* toAdopt, const Locale& locale, UBreakIteratorType kind, UErrorCode& status)
317 {
318 ICULocaleService *service = getService();
319 if (service == NULL) {
320 status = U_MEMORY_ALLOCATION_ERROR;
321 return NULL;
322 }
323 return service->registerInstance(toAdopt, locale, kind, status);
324 }
325
326 // -------------------------------------
327
328 UBool U_EXPORT2
unregister(URegistryKey key,UErrorCode & status)329 BreakIterator::unregister(URegistryKey key, UErrorCode& status)
330 {
331 if (U_SUCCESS(status)) {
332 if (hasService()) {
333 return gService->unregister(key, status);
334 }
335 status = U_MEMORY_ALLOCATION_ERROR;
336 }
337 return FALSE;
338 }
339
340 // -------------------------------------
341
342 StringEnumeration* U_EXPORT2
getAvailableLocales(void)343 BreakIterator::getAvailableLocales(void)
344 {
345 ICULocaleService *service = getService();
346 if (service == NULL) {
347 return NULL;
348 }
349 return service->getAvailableLocales();
350 }
351 #endif /* UCONFIG_NO_SERVICE */
352
353 // -------------------------------------
354
355 BreakIterator*
createInstance(const Locale & loc,int32_t kind,UErrorCode & status)356 BreakIterator::createInstance(const Locale& loc, int32_t kind, UErrorCode& status)
357 {
358 if (U_FAILURE(status)) {
359 return NULL;
360 }
361
362 #if !UCONFIG_NO_SERVICE
363 if (hasService()) {
364 Locale actualLoc("");
365 BreakIterator *result = (BreakIterator*)gService->get(loc, kind, &actualLoc, status);
366 // TODO: The way the service code works in ICU 2.8 is that if
367 // there is a real registered break iterator, the actualLoc
368 // will be populated, but if the handleDefault path is taken
369 // (because nothing is registered that can handle the
370 // requested locale) then the actualLoc comes back empty. In
371 // that case, the returned object already has its actual/valid
372 // locale data populated (by makeInstance, which is what
373 // handleDefault calls), so we don't touch it. YES, A COMMENT
374 // THIS LONG is a sign of bad code -- so the action item is to
375 // revisit this in ICU 3.0 and clean it up/fix it/remove it.
376 if (U_SUCCESS(status) && (result != NULL) && *actualLoc.getName() != 0) {
377 U_LOCALE_BASED(locBased, *result);
378 locBased.setLocaleIDs(actualLoc.getName(), actualLoc.getName());
379 }
380 return result;
381 }
382 else
383 #endif
384 {
385 return makeInstance(loc, kind, status);
386 }
387 }
388
389 // -------------------------------------
390
391 BreakIterator*
makeInstance(const Locale & loc,int32_t kind,UErrorCode & status)392 BreakIterator::makeInstance(const Locale& loc, int32_t kind, UErrorCode& status)
393 {
394
395 if (U_FAILURE(status)) {
396 return NULL;
397 }
398
399 BreakIterator *result = NULL;
400 switch (kind) {
401 case UBRK_CHARACTER:
402 result = BreakIterator::buildInstance(loc, "grapheme", kind, status);
403 break;
404 case UBRK_WORD:
405 result = BreakIterator::buildInstance(loc, "word", kind, status);
406 break;
407 case UBRK_LINE:
408 result = BreakIterator::buildInstance(loc, "line", kind, status);
409 break;
410 case UBRK_SENTENCE:
411 result = BreakIterator::buildInstance(loc, "sentence", kind, status);
412 break;
413 case UBRK_TITLE:
414 result = BreakIterator::buildInstance(loc, "title", kind, status);
415 break;
416 default:
417 status = U_ILLEGAL_ARGUMENT_ERROR;
418 }
419
420 if (U_FAILURE(status)) {
421 return NULL;
422 }
423
424 return result;
425 }
426
427 Locale
getLocale(ULocDataLocaleType type,UErrorCode & status) const428 BreakIterator::getLocale(ULocDataLocaleType type, UErrorCode& status) const {
429 U_LOCALE_BASED(locBased, *this);
430 return locBased.getLocale(type, status);
431 }
432
433 const char *
getLocaleID(ULocDataLocaleType type,UErrorCode & status) const434 BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
435 U_LOCALE_BASED(locBased, *this);
436 return locBased.getLocaleID(type, status);
437 }
438
439 // This implementation of getRuleStatus is a do-nothing stub, here to
440 // provide a default implementation for any derived BreakIterator classes that
441 // do not implement it themselves.
getRuleStatus() const442 int32_t BreakIterator::getRuleStatus() const {
443 return 0;
444 }
445
446 U_NAMESPACE_END
447
448 #endif /* #if !UCONFIG_NO_BREAK_ITERATION */
449
450 //eof
451