intl/icu/source/common/unicode/normalizer2.h@6474c204b198
intl/icu/source/common/unicode/normalizer2.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /*
2 *******************************************************************************
3 *
4 * Copyright (C) 2009-2013, International Business Machines
5 * Corporation and others. All Rights Reserved.
6 *
7 *******************************************************************************
8 * file name: normalizer2.h
9 * encoding: US-ASCII
10 * tab size: 8 (not used)
11 * indentation:4
12 *
13 * created on: 2009nov22
14 * created by: Markus W. Scherer
15 */
17 #ifndef __NORMALIZER2_H__
18 #define __NORMALIZER2_H__
20 /**
21 * \file
22 * \brief C++ API: New API for Unicode Normalization.
23 */
25 #include "unicode/utypes.h"
27 #if !UCONFIG_NO_NORMALIZATION
29 #include "unicode/uniset.h"
30 #include "unicode/unistr.h"
31 #include "unicode/unorm2.h"
33 U_NAMESPACE_BEGIN
35 /**
36 * Unicode normalization functionality for standard Unicode normalization or
37 * for using custom mapping tables.
38 * All instances of this class are unmodifiable/immutable.
39 * Instances returned by getInstance() are singletons that must not be deleted by the caller.
40 * The Normalizer2 class is not intended for public subclassing.
41 *
42 * The primary functions are to produce a normalized string and to detect whether
43 * a string is already normalized.
44 * The most commonly used normalization forms are those defined in
45 * http://www.unicode.org/unicode/reports/tr15/
46 * However, this API supports additional normalization forms for specialized purposes.
47 * For example, NFKC_Casefold is provided via getInstance("nfkc_cf", COMPOSE)
48 * and can be used in implementations of UTS #46.
49 *
50 * Not only are the standard compose and decompose modes supplied,
51 * but additional modes are provided as documented in the Mode enum.
52 *
53 * Some of the functions in this class identify normalization boundaries.
54 * At a normalization boundary, the portions of the string
55 * before it and starting from it do not interact and can be handled independently.
56 *
57 * The spanQuickCheckYes() stops at a normalization boundary.
58 * When the goal is a normalized string, then the text before the boundary
59 * can be copied, and the remainder can be processed with normalizeSecondAndAppend().
60 *
61 * The hasBoundaryBefore(), hasBoundaryAfter() and isInert() functions test whether
62 * a character is guaranteed to be at a normalization boundary,
63 * regardless of context.
64 * This is used for moving from one normalization boundary to the next
65 * or preceding boundary, and for performing iterative normalization.
66 *
67 * Iterative normalization is useful when only a small portion of a
68 * longer string needs to be processed.
69 * For example, in ICU, iterative normalization is used by the NormalizationTransliterator
70 * (to avoid replacing already-normalized text) and ucol_nextSortKeyPart()
71 * (to process only the substring for which sort key bytes are computed).
72 *
73 * The set of normalization boundaries returned by these functions may not be
74 * complete: There may be more boundaries that could be returned.
75 * Different functions may return different boundaries.
76 * @stable ICU 4.4
77 */
78 class U_COMMON_API Normalizer2 : public UObject {
79 public:
80 /**
81 * Destructor.
82 * @stable ICU 4.4
83 */
84 ~Normalizer2();
86 /**
87 * Returns a Normalizer2 instance for Unicode NFC normalization.
88 * Same as getInstance(NULL, "nfc", UNORM2_COMPOSE, errorCode).
89 * Returns an unmodifiable singleton instance. Do not delete it.
90 * @param errorCode Standard ICU error code. Its input value must
91 * pass the U_SUCCESS() test, or else the function returns
92 * immediately. Check for U_FAILURE() on output or use with
93 * function chaining. (See User Guide for details.)
94 * @return the requested Normalizer2, if successful
95 * @stable ICU 49
96 */
97 static const Normalizer2 *
98 getNFCInstance(UErrorCode &errorCode);
100 /**
101 * Returns a Normalizer2 instance for Unicode NFD normalization.
102 * Same as getInstance(NULL, "nfc", UNORM2_DECOMPOSE, errorCode).
103 * Returns an unmodifiable singleton instance. Do not delete it.
104 * @param errorCode Standard ICU error code. Its input value must
105 * pass the U_SUCCESS() test, or else the function returns
106 * immediately. Check for U_FAILURE() on output or use with
107 * function chaining. (See User Guide for details.)
108 * @return the requested Normalizer2, if successful
109 * @stable ICU 49
110 */
111 static const Normalizer2 *
112 getNFDInstance(UErrorCode &errorCode);
114 /**
115 * Returns a Normalizer2 instance for Unicode NFKC normalization.
116 * Same as getInstance(NULL, "nfkc", UNORM2_COMPOSE, errorCode).
117 * Returns an unmodifiable singleton instance. Do not delete it.
118 * @param errorCode Standard ICU error code. Its input value must
119 * pass the U_SUCCESS() test, or else the function returns
120 * immediately. Check for U_FAILURE() on output or use with
121 * function chaining. (See User Guide for details.)
122 * @return the requested Normalizer2, if successful
123 * @stable ICU 49
124 */
125 static const Normalizer2 *
126 getNFKCInstance(UErrorCode &errorCode);
128 /**
129 * Returns a Normalizer2 instance for Unicode NFKD normalization.
130 * Same as getInstance(NULL, "nfkc", UNORM2_DECOMPOSE, errorCode).
131 * Returns an unmodifiable singleton instance. Do not delete it.
132 * @param errorCode Standard ICU error code. Its input value must
133 * pass the U_SUCCESS() test, or else the function returns
134 * immediately. Check for U_FAILURE() on output or use with
135 * function chaining. (See User Guide for details.)
136 * @return the requested Normalizer2, if successful
137 * @stable ICU 49
138 */
139 static const Normalizer2 *
140 getNFKDInstance(UErrorCode &errorCode);
142 /**
143 * Returns a Normalizer2 instance for Unicode NFKC_Casefold normalization.
144 * Same as getInstance(NULL, "nfkc_cf", UNORM2_COMPOSE, errorCode).
145 * Returns an unmodifiable singleton instance. Do not delete it.
146 * @param errorCode Standard ICU error code. Its input value must
147 * pass the U_SUCCESS() test, or else the function returns
148 * immediately. Check for U_FAILURE() on output or use with
149 * function chaining. (See User Guide for details.)
150 * @return the requested Normalizer2, if successful
151 * @stable ICU 49
152 */
153 static const Normalizer2 *
154 getNFKCCasefoldInstance(UErrorCode &errorCode);
156 /**
157 * Returns a Normalizer2 instance which uses the specified data file
158 * (packageName/name similar to ucnv_openPackage() and ures_open()/ResourceBundle)
159 * and which composes or decomposes text according to the specified mode.
160 * Returns an unmodifiable singleton instance. Do not delete it.
161 *
162 * Use packageName=NULL for data files that are part of ICU's own data.
163 * Use name="nfc" and UNORM2_COMPOSE/UNORM2_DECOMPOSE for Unicode standard NFC/NFD.
164 * Use name="nfkc" and UNORM2_COMPOSE/UNORM2_DECOMPOSE for Unicode standard NFKC/NFKD.
165 * Use name="nfkc_cf" and UNORM2_COMPOSE for Unicode standard NFKC_CF=NFKC_Casefold.
166 *
167 * @param packageName NULL for ICU built-in data, otherwise application data package name
168 * @param name "nfc" or "nfkc" or "nfkc_cf" or name of custom data file
169 * @param mode normalization mode (compose or decompose etc.)
170 * @param errorCode Standard ICU error code. Its input value must
171 * pass the U_SUCCESS() test, or else the function returns
172 * immediately. Check for U_FAILURE() on output or use with
173 * function chaining. (See User Guide for details.)
174 * @return the requested Normalizer2, if successful
175 * @stable ICU 4.4
176 */
177 static const Normalizer2 *
178 getInstance(const char *packageName,
179 const char *name,
180 UNormalization2Mode mode,
181 UErrorCode &errorCode);
183 /**
184 * Returns the normalized form of the source string.
185 * @param src source string
186 * @param errorCode Standard ICU error code. Its input value must
187 * pass the U_SUCCESS() test, or else the function returns
188 * immediately. Check for U_FAILURE() on output or use with
189 * function chaining. (See User Guide for details.)
190 * @return normalized src
191 * @stable ICU 4.4
192 */
193 UnicodeString
194 normalize(const UnicodeString &src, UErrorCode &errorCode) const {
195 UnicodeString result;
196 normalize(src, result, errorCode);
197 return result;
198 }
199 /**
200 * Writes the normalized form of the source string to the destination string
201 * (replacing its contents) and returns the destination string.
202 * The source and destination strings must be different objects.
203 * @param src source string
204 * @param dest destination string; its contents is replaced with normalized src
205 * @param errorCode Standard ICU error code. Its input value must
206 * pass the U_SUCCESS() test, or else the function returns
207 * immediately. Check for U_FAILURE() on output or use with
208 * function chaining. (See User Guide for details.)
209 * @return dest
210 * @stable ICU 4.4
211 */
212 virtual UnicodeString &
213 normalize(const UnicodeString &src,
214 UnicodeString &dest,
215 UErrorCode &errorCode) const = 0;
216 /**
217 * Appends the normalized form of the second string to the first string
218 * (merging them at the boundary) and returns the first string.
219 * The result is normalized if the first string was normalized.
220 * The first and second strings must be different objects.
221 * @param first string, should be normalized
222 * @param second string, will be normalized
223 * @param errorCode Standard ICU error code. Its input value must
224 * pass the U_SUCCESS() test, or else the function returns
225 * immediately. Check for U_FAILURE() on output or use with
226 * function chaining. (See User Guide for details.)
227 * @return first
228 * @stable ICU 4.4
229 */
230 virtual UnicodeString &
231 normalizeSecondAndAppend(UnicodeString &first,
232 const UnicodeString &second,
233 UErrorCode &errorCode) const = 0;
234 /**
235 * Appends the second string to the first string
236 * (merging them at the boundary) and returns the first string.
237 * The result is normalized if both the strings were normalized.
238 * The first and second strings must be different objects.
239 * @param first string, should be normalized
240 * @param second string, should be normalized
241 * @param errorCode Standard ICU error code. Its input value must
242 * pass the U_SUCCESS() test, or else the function returns
243 * immediately. Check for U_FAILURE() on output or use with
244 * function chaining. (See User Guide for details.)
245 * @return first
246 * @stable ICU 4.4
247 */
248 virtual UnicodeString &
249 append(UnicodeString &first,
250 const UnicodeString &second,
251 UErrorCode &errorCode) const = 0;
253 /**
254 * Gets the decomposition mapping of c.
255 * Roughly equivalent to normalizing the String form of c
256 * on a UNORM2_DECOMPOSE Normalizer2 instance, but much faster, and except that this function
257 * returns FALSE and does not write a string
258 * if c does not have a decomposition mapping in this instance's data.
259 * This function is independent of the mode of the Normalizer2.
260 * @param c code point
261 * @param decomposition String object which will be set to c's
262 * decomposition mapping, if there is one.
263 * @return TRUE if c has a decomposition, otherwise FALSE
264 * @stable ICU 4.6
265 */
266 virtual UBool
267 getDecomposition(UChar32 c, UnicodeString &decomposition) const = 0;
269 /**
270 * Gets the raw decomposition mapping of c.
271 *
272 * This is similar to the getDecomposition() method but returns the
273 * raw decomposition mapping as specified in UnicodeData.txt or
274 * (for custom data) in the mapping files processed by the gennorm2 tool.
275 * By contrast, getDecomposition() returns the processed,
276 * recursively-decomposed version of this mapping.
277 *
278 * When used on a standard NFKC Normalizer2 instance,
279 * getRawDecomposition() returns the Unicode Decomposition_Mapping (dm) property.
280 *
281 * When used on a standard NFC Normalizer2 instance,
282 * it returns the Decomposition_Mapping only if the Decomposition_Type (dt) is Canonical (Can);
283 * in this case, the result contains either one or two code points (=1..4 UChars).
284 *
285 * This function is independent of the mode of the Normalizer2.
286 * The default implementation returns FALSE.
287 * @param c code point
288 * @param decomposition String object which will be set to c's
289 * raw decomposition mapping, if there is one.
290 * @return TRUE if c has a decomposition, otherwise FALSE
291 * @stable ICU 49
292 */
293 virtual UBool
294 getRawDecomposition(UChar32 c, UnicodeString &decomposition) const;
296 /**
297 * Performs pairwise composition of a & b and returns the composite if there is one.
298 *
299 * Returns a composite code point c only if c has a two-way mapping to a+b.
300 * In standard Unicode normalization, this means that
301 * c has a canonical decomposition to a+b
302 * and c does not have the Full_Composition_Exclusion property.
303 *
304 * This function is independent of the mode of the Normalizer2.
305 * The default implementation returns a negative value.
306 * @param a A (normalization starter) code point.
307 * @param b Another code point.
308 * @return The non-negative composite code point if there is one; otherwise a negative value.
309 * @stable ICU 49
310 */
311 virtual UChar32
312 composePair(UChar32 a, UChar32 b) const;
314 /**
315 * Gets the combining class of c.
316 * The default implementation returns 0
317 * but all standard implementations return the Unicode Canonical_Combining_Class value.
318 * @param c code point
319 * @return c's combining class
320 * @stable ICU 49
321 */
322 virtual uint8_t
323 getCombiningClass(UChar32 c) const;
325 /**
326 * Tests if the string is normalized.
327 * Internally, in cases where the quickCheck() method would return "maybe"
328 * (which is only possible for the two COMPOSE modes) this method
329 * resolves to "yes" or "no" to provide a definitive result,
330 * at the cost of doing more work in those cases.
331 * @param s input string
332 * @param errorCode Standard ICU error code. Its input value must
333 * pass the U_SUCCESS() test, or else the function returns
334 * immediately. Check for U_FAILURE() on output or use with
335 * function chaining. (See User Guide for details.)
336 * @return TRUE if s is normalized
337 * @stable ICU 4.4
338 */
339 virtual UBool
340 isNormalized(const UnicodeString &s, UErrorCode &errorCode) const = 0;
342 /**
343 * Tests if the string is normalized.
344 * For the two COMPOSE modes, the result could be "maybe" in cases that
345 * would take a little more work to resolve definitively.
346 * Use spanQuickCheckYes() and normalizeSecondAndAppend() for a faster
347 * combination of quick check + normalization, to avoid
348 * re-checking the "yes" prefix.
349 * @param s input string
350 * @param errorCode Standard ICU error code. Its input value must
351 * pass the U_SUCCESS() test, or else the function returns
352 * immediately. Check for U_FAILURE() on output or use with
353 * function chaining. (See User Guide for details.)
354 * @return UNormalizationCheckResult
355 * @stable ICU 4.4
356 */
357 virtual UNormalizationCheckResult
358 quickCheck(const UnicodeString &s, UErrorCode &errorCode) const = 0;
360 /**
361 * Returns the end of the normalized substring of the input string.
362 * In other words, with <code>end=spanQuickCheckYes(s, ec);</code>
363 * the substring <code>UnicodeString(s, 0, end)</code>
364 * will pass the quick check with a "yes" result.
365 *
366 * The returned end index is usually one or more characters before the
367 * "no" or "maybe" character: The end index is at a normalization boundary.
368 * (See the class documentation for more about normalization boundaries.)
369 *
370 * When the goal is a normalized string and most input strings are expected
371 * to be normalized already, then call this method,
372 * and if it returns a prefix shorter than the input string,
373 * copy that prefix and use normalizeSecondAndAppend() for the remainder.
374 * @param s input string
375 * @param errorCode Standard ICU error code. Its input value must
376 * pass the U_SUCCESS() test, or else the function returns
377 * immediately. Check for U_FAILURE() on output or use with
378 * function chaining. (See User Guide for details.)
379 * @return "yes" span end index
380 * @stable ICU 4.4
381 */
382 virtual int32_t
383 spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const = 0;
385 /**
386 * Tests if the character always has a normalization boundary before it,
387 * regardless of context.
388 * If true, then the character does not normalization-interact with
389 * preceding characters.
390 * In other words, a string containing this character can be normalized
391 * by processing portions before this character and starting from this
392 * character independently.
393 * This is used for iterative normalization. See the class documentation for details.
394 * @param c character to test
395 * @return TRUE if c has a normalization boundary before it
396 * @stable ICU 4.4
397 */
398 virtual UBool hasBoundaryBefore(UChar32 c) const = 0;
400 /**
401 * Tests if the character always has a normalization boundary after it,
402 * regardless of context.
403 * If true, then the character does not normalization-interact with
404 * following characters.
405 * In other words, a string containing this character can be normalized
406 * by processing portions up to this character and after this
407 * character independently.
408 * This is used for iterative normalization. See the class documentation for details.
409 * Note that this operation may be significantly slower than hasBoundaryBefore().
410 * @param c character to test
411 * @return TRUE if c has a normalization boundary after it
412 * @stable ICU 4.4
413 */
414 virtual UBool hasBoundaryAfter(UChar32 c) const = 0;
416 /**
417 * Tests if the character is normalization-inert.
418 * If true, then the character does not change, nor normalization-interact with
419 * preceding or following characters.
420 * In other words, a string containing this character can be normalized
421 * by processing portions before this character and after this
422 * character independently.
423 * This is used for iterative normalization. See the class documentation for details.
424 * Note that this operation may be significantly slower than hasBoundaryBefore().
425 * @param c character to test
426 * @return TRUE if c is normalization-inert
427 * @stable ICU 4.4
428 */
429 virtual UBool isInert(UChar32 c) const = 0;
430 };
432 /**
433 * Normalization filtered by a UnicodeSet.
434 * Normalizes portions of the text contained in the filter set and leaves
435 * portions not contained in the filter set unchanged.
436 * Filtering is done via UnicodeSet::span(..., USET_SPAN_SIMPLE).
437 * Not-in-the-filter text is treated as "is normalized" and "quick check yes".
438 * This class implements all of (and only) the Normalizer2 API.
439 * An instance of this class is unmodifiable/immutable but is constructed and
440 * must be destructed by the owner.
441 * @stable ICU 4.4
442 */
443 class U_COMMON_API FilteredNormalizer2 : public Normalizer2 {
444 public:
445 /**
446 * Constructs a filtered normalizer wrapping any Normalizer2 instance
447 * and a filter set.
448 * Both are aliased and must not be modified or deleted while this object
449 * is used.
450 * The filter set should be frozen; otherwise the performance will suffer greatly.
451 * @param n2 wrapped Normalizer2 instance
452 * @param filterSet UnicodeSet which determines the characters to be normalized
453 * @stable ICU 4.4
454 */
455 FilteredNormalizer2(const Normalizer2 &n2, const UnicodeSet &filterSet) :
456 norm2(n2), set(filterSet) {}
458 /**
459 * Destructor.
460 * @stable ICU 4.4
461 */
462 ~FilteredNormalizer2();
464 /**
465 * Writes the normalized form of the source string to the destination string
466 * (replacing its contents) and returns the destination string.
467 * The source and destination strings must be different objects.
468 * @param src source string
469 * @param dest destination string; its contents is replaced with normalized src
470 * @param errorCode Standard ICU error code. Its input value must
471 * pass the U_SUCCESS() test, or else the function returns
472 * immediately. Check for U_FAILURE() on output or use with
473 * function chaining. (See User Guide for details.)
474 * @return dest
475 * @stable ICU 4.4
476 */
477 virtual UnicodeString &
478 normalize(const UnicodeString &src,
479 UnicodeString &dest,
480 UErrorCode &errorCode) const;
481 /**
482 * Appends the normalized form of the second string to the first string
483 * (merging them at the boundary) and returns the first string.
484 * The result is normalized if the first string was normalized.
485 * The first and second strings must be different objects.
486 * @param first string, should be normalized
487 * @param second string, will be normalized
488 * @param errorCode Standard ICU error code. Its input value must
489 * pass the U_SUCCESS() test, or else the function returns
490 * immediately. Check for U_FAILURE() on output or use with
491 * function chaining. (See User Guide for details.)
492 * @return first
493 * @stable ICU 4.4
494 */
495 virtual UnicodeString &
496 normalizeSecondAndAppend(UnicodeString &first,
497 const UnicodeString &second,
498 UErrorCode &errorCode) const;
499 /**
500 * Appends the second string to the first string
501 * (merging them at the boundary) and returns the first string.
502 * The result is normalized if both the strings were normalized.
503 * The first and second strings must be different objects.
504 * @param first string, should be normalized
505 * @param second string, should be normalized
506 * @param errorCode Standard ICU error code. Its input value must
507 * pass the U_SUCCESS() test, or else the function returns
508 * immediately. Check for U_FAILURE() on output or use with
509 * function chaining. (See User Guide for details.)
510 * @return first
511 * @stable ICU 4.4
512 */
513 virtual UnicodeString &
514 append(UnicodeString &first,
515 const UnicodeString &second,
516 UErrorCode &errorCode) const;
518 /**
519 * Gets the decomposition mapping of c.
520 * For details see the base class documentation.
521 *
522 * This function is independent of the mode of the Normalizer2.
523 * @param c code point
524 * @param decomposition String object which will be set to c's
525 * decomposition mapping, if there is one.
526 * @return TRUE if c has a decomposition, otherwise FALSE
527 * @stable ICU 4.6
528 */
529 virtual UBool
530 getDecomposition(UChar32 c, UnicodeString &decomposition) const;
532 /**
533 * Gets the raw decomposition mapping of c.
534 * For details see the base class documentation.
535 *
536 * This function is independent of the mode of the Normalizer2.
537 * @param c code point
538 * @param decomposition String object which will be set to c's
539 * raw decomposition mapping, if there is one.
540 * @return TRUE if c has a decomposition, otherwise FALSE
541 * @stable ICU 49
542 */
543 virtual UBool
544 getRawDecomposition(UChar32 c, UnicodeString &decomposition) const;
546 /**
547 * Performs pairwise composition of a & b and returns the composite if there is one.
548 * For details see the base class documentation.
549 *
550 * This function is independent of the mode of the Normalizer2.
551 * @param a A (normalization starter) code point.
552 * @param b Another code point.
553 * @return The non-negative composite code point if there is one; otherwise a negative value.
554 * @stable ICU 49
555 */
556 virtual UChar32
557 composePair(UChar32 a, UChar32 b) const;
559 /**
560 * Gets the combining class of c.
561 * The default implementation returns 0
562 * but all standard implementations return the Unicode Canonical_Combining_Class value.
563 * @param c code point
564 * @return c's combining class
565 * @stable ICU 49
566 */
567 virtual uint8_t
568 getCombiningClass(UChar32 c) const;
570 /**
571 * Tests if the string is normalized.
572 * For details see the Normalizer2 base class documentation.
573 * @param s input string
574 * @param errorCode Standard ICU error code. Its input value must
575 * pass the U_SUCCESS() test, or else the function returns
576 * immediately. Check for U_FAILURE() on output or use with
577 * function chaining. (See User Guide for details.)
578 * @return TRUE if s is normalized
579 * @stable ICU 4.4
580 */
581 virtual UBool
582 isNormalized(const UnicodeString &s, UErrorCode &errorCode) const;
583 /**
584 * Tests if the string is normalized.
585 * For details see the Normalizer2 base class documentation.
586 * @param s input string
587 * @param errorCode Standard ICU error code. Its input value must
588 * pass the U_SUCCESS() test, or else the function returns
589 * immediately. Check for U_FAILURE() on output or use with
590 * function chaining. (See User Guide for details.)
591 * @return UNormalizationCheckResult
592 * @stable ICU 4.4
593 */
594 virtual UNormalizationCheckResult
595 quickCheck(const UnicodeString &s, UErrorCode &errorCode) const;
596 /**
597 * Returns the end of the normalized substring of the input string.
598 * For details see the Normalizer2 base class documentation.
599 * @param s input string
600 * @param errorCode Standard ICU error code. Its input value must
601 * pass the U_SUCCESS() test, or else the function returns
602 * immediately. Check for U_FAILURE() on output or use with
603 * function chaining. (See User Guide for details.)
604 * @return "yes" span end index
605 * @stable ICU 4.4
606 */
607 virtual int32_t
608 spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const;
610 /**
611 * Tests if the character always has a normalization boundary before it,
612 * regardless of context.
613 * For details see the Normalizer2 base class documentation.
614 * @param c character to test
615 * @return TRUE if c has a normalization boundary before it
616 * @stable ICU 4.4
617 */
618 virtual UBool hasBoundaryBefore(UChar32 c) const;
620 /**
621 * Tests if the character always has a normalization boundary after it,
622 * regardless of context.
623 * For details see the Normalizer2 base class documentation.
624 * @param c character to test
625 * @return TRUE if c has a normalization boundary after it
626 * @stable ICU 4.4
627 */
628 virtual UBool hasBoundaryAfter(UChar32 c) const;
630 /**
631 * Tests if the character is normalization-inert.
632 * For details see the Normalizer2 base class documentation.
633 * @param c character to test
634 * @return TRUE if c is normalization-inert
635 * @stable ICU 4.4
636 */
637 virtual UBool isInert(UChar32 c) const;
638 private:
639 UnicodeString &
640 normalize(const UnicodeString &src,
641 UnicodeString &dest,
642 USetSpanCondition spanCondition,
643 UErrorCode &errorCode) const;
645 UnicodeString &
646 normalizeSecondAndAppend(UnicodeString &first,
647 const UnicodeString &second,
648 UBool doNormalize,
649 UErrorCode &errorCode) const;
651 const Normalizer2 &norm2;
652 const UnicodeSet &set;
653 };
655 U_NAMESPACE_END
657 #endif // !UCONFIG_NO_NORMALIZATION
658 #endif // __NORMALIZER2_H__
