2
*******************************************************************************
4
* Copyright (C) 2005-2010, International Business Machines
5
* Corporation and others. All Rights Reserved.
7
*******************************************************************************
8
* file name: ucasemap.h
10
* tab size: 8 (not used)
13
* created on: 2005may06
14
* created by: Markus W. Scherer
16
* Case mapping service object and functions using it.
19
#ifndef __UCASEMAP_H__
20
#define __UCASEMAP_H__
22
#include "unicode/utypes.h"
23
#include "unicode/ustring.h"
24
#include "unicode/localpointer.h"
28
* \brief C API: Unicode case mapping functions using a UCaseMap service object.
30
* The service object takes care of memory allocations, data loading, and setup
31
* for the attributes, as usual.
33
* Currently, the functionality provided here does not overlap with uchar.h
34
* and ustring.h, except for ucasemap_toTitle().
36
* ucasemap_utf8XYZ() functions operate directly on UTF-8 strings.
40
* UCaseMap is an opaque service object for newer ICU case mapping functions.
41
* Older functions did not use a service object.
45
typedef struct UCaseMap UCaseMap; /**< C typedef for struct UCaseMap. @stable ICU 3.4 */
48
* Open a UCaseMap service object for a locale and a set of options.
49
* The locale ID and options are preprocessed so that functions using the
50
* service object need not process them in each call.
52
* @param locale ICU locale ID, used for language-dependent
53
* upper-/lower-/title-casing according to the Unicode standard.
54
* Usual semantics: ""=root, NULL=default locale, etc.
55
* @param options Options bit set, used for case folding and string comparisons.
56
* Same flags as for u_foldCase(), u_strFoldCase(),
57
* u_strCaseCompare(), etc.
58
* Use 0 or U_FOLD_CASE_DEFAULT for default behavior.
59
* @param pErrorCode Must be a valid pointer to an error code value,
60
* which must not indicate a failure before the function call.
61
* @return Pointer to a UCaseMap service object, if successful.
63
* @see U_FOLD_CASE_DEFAULT
64
* @see U_FOLD_CASE_EXCLUDE_SPECIAL_I
65
* @see U_TITLECASE_NO_LOWERCASE
66
* @see U_TITLECASE_NO_BREAK_ADJUSTMENT
69
U_STABLE UCaseMap * U_EXPORT2
70
ucasemap_open(const char *locale, uint32_t options, UErrorCode *pErrorCode);
73
* Close a UCaseMap service object.
74
* @param csm Object to be closed.
77
U_STABLE void U_EXPORT2
78
ucasemap_close(UCaseMap *csm);
80
#if U_SHOW_CPLUSPLUS_API
85
* \class LocalUCaseMapPointer
86
* "Smart pointer" class, closes a UCaseMap via ucasemap_close().
87
* For most methods see the LocalPointerBase base class.
89
* @see LocalPointerBase
93
U_DEFINE_LOCAL_OPEN_POINTER(LocalUCaseMapPointer, UCaseMap, ucasemap_close);
100
* Get the locale ID that is used for language-dependent case mappings.
101
* @param csm UCaseMap service object.
105
U_STABLE const char * U_EXPORT2
106
ucasemap_getLocale(const UCaseMap *csm);
109
* Get the options bit set that is used for case folding and string comparisons.
110
* @param csm UCaseMap service object.
111
* @return options bit set
114
U_STABLE uint32_t U_EXPORT2
115
ucasemap_getOptions(const UCaseMap *csm);
118
* Set the locale ID that is used for language-dependent case mappings.
120
* @param csm UCaseMap service object.
121
* @param locale Locale ID, see ucasemap_open().
122
* @param pErrorCode Must be a valid pointer to an error code value,
123
* which must not indicate a failure before the function call.
128
U_STABLE void U_EXPORT2
129
ucasemap_setLocale(UCaseMap *csm, const char *locale, UErrorCode *pErrorCode);
132
* Set the options bit set that is used for case folding and string comparisons.
134
* @param csm UCaseMap service object.
135
* @param options Options bit set, see ucasemap_open().
136
* @param pErrorCode Must be a valid pointer to an error code value,
137
* which must not indicate a failure before the function call.
142
U_STABLE void U_EXPORT2
143
ucasemap_setOptions(UCaseMap *csm, uint32_t options, UErrorCode *pErrorCode);
146
* Do not lowercase non-initial parts of words when titlecasing.
147
* Option bit for titlecasing APIs that take an options bit set.
149
* By default, titlecasing will titlecase the first cased character
150
* of a word and lowercase all other characters.
151
* With this option, the other characters will not be modified.
153
* @see ucasemap_setOptions
154
* @see ucasemap_toTitle
155
* @see ucasemap_utf8ToTitle
156
* @see UnicodeString::toTitle
159
#define U_TITLECASE_NO_LOWERCASE 0x100
162
* Do not adjust the titlecasing indexes from BreakIterator::next() indexes;
163
* titlecase exactly the characters at breaks from the iterator.
164
* Option bit for titlecasing APIs that take an options bit set.
166
* By default, titlecasing will take each break iterator index,
167
* adjust it by looking for the next cased character, and titlecase that one.
168
* Other characters are lowercased.
170
* This follows Unicode 4 & 5 section 3.13 Default Case Operations:
172
* R3 toTitlecase(X): Find the word boundaries based on Unicode Standard Annex
173
* #29, "Text Boundaries." Between each pair of word boundaries, find the first
174
* cased character F. If F exists, map F to default_title(F); then map each
175
* subsequent character C to default_lower(C).
177
* @see ucasemap_setOptions
178
* @see ucasemap_toTitle
179
* @see ucasemap_utf8ToTitle
180
* @see UnicodeString::toTitle
181
* @see U_TITLECASE_NO_LOWERCASE
184
#define U_TITLECASE_NO_BREAK_ADJUSTMENT 0x200
186
#if !UCONFIG_NO_BREAK_ITERATION
189
* Get the break iterator that is used for titlecasing.
190
* Do not modify the returned break iterator.
191
* @param csm UCaseMap service object.
192
* @return titlecasing break iterator
195
U_STABLE const UBreakIterator * U_EXPORT2
196
ucasemap_getBreakIterator(const UCaseMap *csm);
199
* Set the break iterator that is used for titlecasing.
200
* The UCaseMap service object releases a previously set break iterator
201
* and "adopts" this new one, taking ownership of it.
202
* It will be released in a subsequent call to ucasemap_setBreakIterator()
203
* or ucasemap_close().
205
* Break iterator operations are not thread-safe. Therefore, titlecasing
206
* functions use non-const UCaseMap objects. It is not possible to titlecase
207
* strings concurrently using the same UCaseMap.
209
* @param csm UCaseMap service object.
210
* @param iterToAdopt Break iterator to be adopted for titlecasing.
211
* @param pErrorCode Must be a valid pointer to an error code value,
212
* which must not indicate a failure before the function call.
214
* @see ucasemap_toTitle
215
* @see ucasemap_utf8ToTitle
218
U_STABLE void U_EXPORT2
219
ucasemap_setBreakIterator(UCaseMap *csm, UBreakIterator *iterToAdopt, UErrorCode *pErrorCode);
222
* Titlecase a UTF-16 string. This function is almost a duplicate of u_strToTitle(),
223
* except that it takes ucasemap_setOptions() into account and has performance
224
* advantages from being able to use a UCaseMap object for multiple case mapping
225
* operations, saving setup time.
227
* Casing is locale-dependent and context-sensitive.
228
* Titlecasing uses a break iterator to find the first characters of words
229
* that are to be titlecased. It titlecases those characters and lowercases
230
* all others. (This can be modified with ucasemap_setOptions().)
232
* Note: This function takes a non-const UCaseMap pointer because it will
233
* open a default break iterator if no break iterator was set yet,
234
* and effectively call ucasemap_setBreakIterator();
235
* also because the break iterator is stateful and will be modified during
238
* The titlecase break iterator can be provided to customize for arbitrary
239
* styles, using rules and dictionaries beyond the standard iterators.
240
* The standard titlecase iterator for the root locale implements the
241
* algorithm of Unicode TR 21.
243
* This function uses only the setUText(), first(), next() and close() methods of the
244
* provided break iterator.
246
* The result may be longer or shorter than the original.
247
* The source string and the destination buffer must not overlap.
249
* @param csm UCaseMap service object. This pointer is non-const!
250
* See the note above for details.
251
* @param dest A buffer for the result string. The result will be NUL-terminated if
252
* the buffer is large enough.
253
* The contents is undefined in case of failure.
254
* @param destCapacity The size of the buffer (number of bytes). If it is 0, then
255
* dest may be NULL and the function will only return the length of the result
256
* without writing any of the result string.
257
* @param src The original string.
258
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
259
* @param pErrorCode Must be a valid pointer to an error code value,
260
* which must not indicate a failure before the function call.
261
* @return The length of the result string, if successful - or in case of a buffer overflow,
262
* in which case it will be greater than destCapacity.
267
U_STABLE int32_t U_EXPORT2
268
ucasemap_toTitle(UCaseMap *csm,
269
UChar *dest, int32_t destCapacity,
270
const UChar *src, int32_t srcLength,
271
UErrorCode *pErrorCode);
276
* Lowercase the characters in a UTF-8 string.
277
* Casing is locale-dependent and context-sensitive.
278
* The result may be longer or shorter than the original.
279
* The source string and the destination buffer must not overlap.
281
* @param csm UCaseMap service object.
282
* @param dest A buffer for the result string. The result will be NUL-terminated if
283
* the buffer is large enough.
284
* The contents is undefined in case of failure.
285
* @param destCapacity The size of the buffer (number of bytes). If it is 0, then
286
* dest may be NULL and the function will only return the length of the result
287
* without writing any of the result string.
288
* @param src The original string.
289
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
290
* @param pErrorCode Must be a valid pointer to an error code value,
291
* which must not indicate a failure before the function call.
292
* @return The length of the result string, if successful - or in case of a buffer overflow,
293
* in which case it will be greater than destCapacity.
298
U_STABLE int32_t U_EXPORT2
299
ucasemap_utf8ToLower(const UCaseMap *csm,
300
char *dest, int32_t destCapacity,
301
const char *src, int32_t srcLength,
302
UErrorCode *pErrorCode);
305
* Uppercase the characters in a UTF-8 string.
306
* Casing is locale-dependent and context-sensitive.
307
* The result may be longer or shorter than the original.
308
* The source string and the destination buffer must not overlap.
310
* @param csm UCaseMap service object.
311
* @param dest A buffer for the result string. The result will be NUL-terminated if
312
* the buffer is large enough.
313
* The contents is undefined in case of failure.
314
* @param destCapacity The size of the buffer (number of bytes). If it is 0, then
315
* dest may be NULL and the function will only return the length of the result
316
* without writing any of the result string.
317
* @param src The original string.
318
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
319
* @param pErrorCode Must be a valid pointer to an error code value,
320
* which must not indicate a failure before the function call.
321
* @return The length of the result string, if successful - or in case of a buffer overflow,
322
* in which case it will be greater than destCapacity.
327
U_STABLE int32_t U_EXPORT2
328
ucasemap_utf8ToUpper(const UCaseMap *csm,
329
char *dest, int32_t destCapacity,
330
const char *src, int32_t srcLength,
331
UErrorCode *pErrorCode);
333
#if !UCONFIG_NO_BREAK_ITERATION
336
* Titlecase a UTF-8 string.
337
* Casing is locale-dependent and context-sensitive.
338
* Titlecasing uses a break iterator to find the first characters of words
339
* that are to be titlecased. It titlecases those characters and lowercases
340
* all others. (This can be modified with ucasemap_setOptions().)
342
* Note: This function takes a non-const UCaseMap pointer because it will
343
* open a default break iterator if no break iterator was set yet,
344
* and effectively call ucasemap_setBreakIterator();
345
* also because the break iterator is stateful and will be modified during
348
* The titlecase break iterator can be provided to customize for arbitrary
349
* styles, using rules and dictionaries beyond the standard iterators.
350
* The standard titlecase iterator for the root locale implements the
351
* algorithm of Unicode TR 21.
353
* This function uses only the setUText(), first(), next() and close() methods of the
354
* provided break iterator.
356
* The result may be longer or shorter than the original.
357
* The source string and the destination buffer must not overlap.
359
* @param csm UCaseMap service object. This pointer is non-const!
360
* See the note above for details.
361
* @param dest A buffer for the result string. The result will be NUL-terminated if
362
* the buffer is large enough.
363
* The contents is undefined in case of failure.
364
* @param destCapacity The size of the buffer (number of bytes). If it is 0, then
365
* dest may be NULL and the function will only return the length of the result
366
* without writing any of the result string.
367
* @param src The original string.
368
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
369
* @param pErrorCode Must be a valid pointer to an error code value,
370
* which must not indicate a failure before the function call.
371
* @return The length of the result string, if successful - or in case of a buffer overflow,
372
* in which case it will be greater than destCapacity.
375
* @see U_TITLECASE_NO_LOWERCASE
376
* @see U_TITLECASE_NO_BREAK_ADJUSTMENT
379
U_STABLE int32_t U_EXPORT2
380
ucasemap_utf8ToTitle(UCaseMap *csm,
381
char *dest, int32_t destCapacity,
382
const char *src, int32_t srcLength,
383
UErrorCode *pErrorCode);
388
* Case-fold the characters in a UTF-8 string.
389
* Case-folding is locale-independent and not context-sensitive,
390
* but there is an option for whether to include or exclude mappings for dotted I
391
* and dotless i that are marked with 'I' in CaseFolding.txt.
392
* The result may be longer or shorter than the original.
393
* The source string and the destination buffer must not overlap.
395
* @param csm UCaseMap service object.
396
* @param dest A buffer for the result string. The result will be NUL-terminated if
397
* the buffer is large enough.
398
* The contents is undefined in case of failure.
399
* @param destCapacity The size of the buffer (number of bytes). If it is 0, then
400
* dest may be NULL and the function will only return the length of the result
401
* without writing any of the result string.
402
* @param src The original string.
403
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
404
* @param pErrorCode Must be a valid pointer to an error code value,
405
* which must not indicate a failure before the function call.
406
* @return The length of the result string, if successful - or in case of a buffer overflow,
407
* in which case it will be greater than destCapacity.
410
* @see ucasemap_setOptions
411
* @see U_FOLD_CASE_DEFAULT
412
* @see U_FOLD_CASE_EXCLUDE_SPECIAL_I
415
U_STABLE int32_t U_EXPORT2
416
ucasemap_utf8FoldCase(const UCaseMap *csm,
417
char *dest, int32_t destCapacity,
418
const char *src, int32_t srcLength,
419
UErrorCode *pErrorCode);