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[apple/icu.git] / icuSources / common / ubrk.cpp
1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ********************************************************************************
5 * Copyright (C) 1996-2015, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 ********************************************************************************
8 */
9
10 #include "unicode/utypes.h"
11
12 #if !UCONFIG_NO_BREAK_ITERATION
13
14 #include "unicode/ubrk.h"
15
16 #include "unicode/brkiter.h"
17 #include "unicode/uloc.h"
18 #include "unicode/ustring.h"
19 #include "unicode/uchriter.h"
20 #include "unicode/rbbi.h"
21 #include "rbbirb.h"
22 #include "uassert.h"
23 #include "cmemory.h"
24
25 U_NAMESPACE_USE
26
27 //------------------------------------------------------------------------------
28 //
29 // ubrk_open Create a canned type of break iterator based on type (word, line, etc.)
30 // and locale.
31 //
32 //------------------------------------------------------------------------------
33 U_CAPI UBreakIterator* U_EXPORT2
34 ubrk_open(UBreakIteratorType type,
35 const char *locale,
36 const UChar *text,
37 int32_t textLength,
38 UErrorCode *status)
39 {
40
41 if(U_FAILURE(*status)) return 0;
42
43 BreakIterator *result = 0;
44
45 switch(type) {
46
47 case UBRK_CHARACTER:
48 result = BreakIterator::createCharacterInstance(Locale(locale), *status);
49 break;
50
51 case UBRK_WORD:
52 result = BreakIterator::createWordInstance(Locale(locale), *status);
53 break;
54
55 case UBRK_LINE:
56 result = BreakIterator::createLineInstance(Locale(locale), *status);
57 break;
58
59 case UBRK_SENTENCE:
60 result = BreakIterator::createSentenceInstance(Locale(locale), *status);
61 break;
62
63 case UBRK_TITLE:
64 result = BreakIterator::createTitleInstance(Locale(locale), *status);
65 break;
66
67 default:
68 *status = U_ILLEGAL_ARGUMENT_ERROR;
69 }
70
71 // check for allocation error
72 if (U_FAILURE(*status)) {
73 return 0;
74 }
75 if(result == 0) {
76 *status = U_MEMORY_ALLOCATION_ERROR;
77 return 0;
78 }
79
80
81 UBreakIterator *uBI = (UBreakIterator *)result;
82 if (text != NULL) {
83 ubrk_setText(uBI, text, textLength, status);
84 }
85 return uBI;
86 }
87
88
89
90 //------------------------------------------------------------------------------
91 //
92 // ubrk_openRules open a break iterator from a set of break rules.
93 // Invokes the rule builder.
94 //
95 //------------------------------------------------------------------------------
96 U_CAPI UBreakIterator* U_EXPORT2
97 ubrk_openRules( const UChar *rules,
98 int32_t rulesLength,
99 const UChar *text,
100 int32_t textLength,
101 UParseError *parseErr,
102 UErrorCode *status) {
103
104 if (status == NULL || U_FAILURE(*status)){
105 return 0;
106 }
107
108 BreakIterator *result = 0;
109 UnicodeString ruleString(rules, rulesLength);
110 result = RBBIRuleBuilder::createRuleBasedBreakIterator(ruleString, parseErr, *status);
111 if(U_FAILURE(*status)) {
112 return 0;
113 }
114
115 UBreakIterator *uBI = (UBreakIterator *)result;
116 if (text != NULL) {
117 ubrk_setText(uBI, text, textLength, status);
118 }
119 return uBI;
120 }
121
122
123 U_CAPI UBreakIterator* U_EXPORT2
124 ubrk_openBinaryRules(const uint8_t *binaryRules, int32_t rulesLength,
125 const UChar * text, int32_t textLength,
126 UErrorCode * status)
127 {
128 if (U_FAILURE(*status)) {
129 return NULL;
130 }
131 if (rulesLength < 0) {
132 *status = U_ILLEGAL_ARGUMENT_ERROR;
133 return NULL;
134 }
135 LocalPointer<RuleBasedBreakIterator> lpRBBI(new RuleBasedBreakIterator(binaryRules, rulesLength, *status), *status);
136 if (U_FAILURE(*status)) {
137 return NULL;
138 }
139 UBreakIterator *uBI = reinterpret_cast<UBreakIterator *>(lpRBBI.orphan());
140 if (text != NULL) {
141 ubrk_setText(uBI, text, textLength, status);
142 }
143 return uBI;
144 }
145
146
147 U_CAPI UBreakIterator * U_EXPORT2
148 ubrk_safeClone(
149 const UBreakIterator *bi,
150 void * /*stackBuffer*/,
151 int32_t *pBufferSize,
152 UErrorCode *status)
153 {
154 if (status == NULL || U_FAILURE(*status)){
155 return NULL;
156 }
157 if (bi == NULL) {
158 *status = U_ILLEGAL_ARGUMENT_ERROR;
159 return NULL;
160 }
161 if (pBufferSize != NULL) {
162 int32_t inputSize = *pBufferSize;
163 *pBufferSize = 1;
164 if (inputSize == 0) {
165 return NULL; // preflighting for deprecated functionality
166 }
167 }
168 BreakIterator *newBI = ((BreakIterator *)bi)->clone();
169 if (newBI == NULL) {
170 *status = U_MEMORY_ALLOCATION_ERROR;
171 } else {
172 *status = U_SAFECLONE_ALLOCATED_WARNING;
173 }
174 return (UBreakIterator *)newBI;
175 }
176
177
178
179 U_CAPI void U_EXPORT2
180 ubrk_close(UBreakIterator *bi)
181 {
182 delete (BreakIterator *)bi;
183 }
184
185
186 // Apple only
187 U_CAPI void U_EXPORT2
188 ubrk_setLineWordOpts(UBreakIterator* bi,
189 ULineWordOptions lineWordOpts)
190 {
191 ((BreakIterator*)bi)->setLineWordOpts(lineWordOpts);
192 }
193
194
195 U_CAPI void U_EXPORT2
196 ubrk_setText(UBreakIterator* bi,
197 const UChar* text,
198 int32_t textLength,
199 UErrorCode* status)
200 {
201 UText ut = UTEXT_INITIALIZER;
202 utext_openUChars(&ut, text, textLength, status);
203 ((BreakIterator*)bi)->setText(&ut, *status);
204 // A stack allocated UText wrapping a UChar * string
205 // can be dumped without explicitly closing it.
206 }
207
208
209
210 U_CAPI void U_EXPORT2
211 ubrk_setUText(UBreakIterator *bi,
212 UText *text,
213 UErrorCode *status)
214 {
215 ((BreakIterator*)bi)->setText(text, *status);
216 }
217
218
219
220
221
222 U_CAPI int32_t U_EXPORT2
223 ubrk_current(const UBreakIterator *bi)
224 {
225
226 return ((BreakIterator*)bi)->current();
227 }
228
229 U_CAPI int32_t U_EXPORT2
230 ubrk_next(UBreakIterator *bi)
231 {
232
233 return ((BreakIterator*)bi)->next();
234 }
235
236 U_CAPI int32_t U_EXPORT2
237 ubrk_previous(UBreakIterator *bi)
238 {
239
240 return ((BreakIterator*)bi)->previous();
241 }
242
243 U_CAPI int32_t U_EXPORT2
244 ubrk_first(UBreakIterator *bi)
245 {
246
247 return ((BreakIterator*)bi)->first();
248 }
249
250 U_CAPI int32_t U_EXPORT2
251 ubrk_last(UBreakIterator *bi)
252 {
253
254 return ((BreakIterator*)bi)->last();
255 }
256
257 U_CAPI int32_t U_EXPORT2
258 ubrk_preceding(UBreakIterator *bi,
259 int32_t offset)
260 {
261
262 return ((BreakIterator*)bi)->preceding(offset);
263 }
264
265 U_CAPI int32_t U_EXPORT2
266 ubrk_following(UBreakIterator *bi,
267 int32_t offset)
268 {
269
270 return ((BreakIterator*)bi)->following(offset);
271 }
272
273 U_CAPI const char* U_EXPORT2
274 ubrk_getAvailable(int32_t index)
275 {
276
277 return uloc_getAvailable(index);
278 }
279
280 U_CAPI int32_t U_EXPORT2
281 ubrk_countAvailable()
282 {
283
284 return uloc_countAvailable();
285 }
286
287
288 U_CAPI UBool U_EXPORT2
289 ubrk_isBoundary(UBreakIterator *bi, int32_t offset)
290 {
291 return ((BreakIterator*)bi)->isBoundary(offset);
292 }
293
294
295 U_CAPI int32_t U_EXPORT2
296 ubrk_getRuleStatus(UBreakIterator *bi)
297 {
298 return ((BreakIterator*)bi)->getRuleStatus();
299 }
300
301 U_CAPI int32_t U_EXPORT2
302 ubrk_getRuleStatusVec(UBreakIterator *bi, int32_t *fillInVec, int32_t capacity, UErrorCode *status)
303 {
304 return ((BreakIterator*)bi)->getRuleStatusVec(fillInVec, capacity, *status);
305 }
306
307
308 U_CAPI const char* U_EXPORT2
309 ubrk_getLocaleByType(const UBreakIterator *bi,
310 ULocDataLocaleType type,
311 UErrorCode* status)
312 {
313 if (bi == NULL) {
314 if (U_SUCCESS(*status)) {
315 *status = U_ILLEGAL_ARGUMENT_ERROR;
316 }
317 return NULL;
318 }
319 return ((BreakIterator*)bi)->getLocaleID(type, *status);
320 }
321
322
323 U_CAPI void U_EXPORT2
324 ubrk_refreshUText(UBreakIterator *bi,
325 UText *text,
326 UErrorCode *status)
327 {
328 BreakIterator *bii = reinterpret_cast<BreakIterator *>(bi);
329 bii->refreshInputText(text, *status);
330 }
331
332 U_CAPI int32_t U_EXPORT2
333 ubrk_getBinaryRules(UBreakIterator *bi,
334 uint8_t * binaryRules, int32_t rulesCapacity,
335 UErrorCode * status)
336 {
337 if (U_FAILURE(*status)) {
338 return 0;
339 }
340 if ((binaryRules == NULL && rulesCapacity > 0) || rulesCapacity < 0) {
341 *status = U_ILLEGAL_ARGUMENT_ERROR;
342 return 0;
343 }
344 RuleBasedBreakIterator* rbbi;
345 if ((rbbi = dynamic_cast<RuleBasedBreakIterator*>(reinterpret_cast<BreakIterator*>(bi))) == NULL) {
346 *status = U_ILLEGAL_ARGUMENT_ERROR;
347 return 0;
348 }
349 uint32_t rulesLength;
350 const uint8_t * returnedRules = rbbi->getBinaryRules(rulesLength);
351 if (rulesLength > INT32_MAX) {
352 *status = U_INDEX_OUTOFBOUNDS_ERROR;
353 return 0;
354 }
355 if (binaryRules != NULL) { // if not preflighting
356 // Here we know rulesLength <= INT32_MAX and rulesCapacity >= 0, can cast safely
357 if ((int32_t)rulesLength > rulesCapacity) {
358 *status = U_BUFFER_OVERFLOW_ERROR;
359 } else {
360 uprv_memcpy(binaryRules, returnedRules, rulesLength);
361 }
362 }
363 return (int32_t)rulesLength;
364 }
365
366
367 #endif /* #if !UCONFIG_NO_BREAK_ITERATION */
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