This file is indexed.

/usr/include/unicode/plurfmt.h is in libicu-dev 4.8.1.1-12+deb7u3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
/*
*******************************************************************************
* Copyright (C) 2007-2011, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*

* File PLURFMT.H
*
* Modification History:*
*   Date        Name        Description
*
********************************************************************************
*/

#ifndef PLURFMT
#define PLURFMT

#include "unicode/utypes.h"

/**
 * \file
 * \brief C++ API: PluralFormat object
 */

#if !UCONFIG_NO_FORMATTING

#include "unicode/messagepattern.h"
#include "unicode/numfmt.h"
#include "unicode/plurrule.h"

U_NAMESPACE_BEGIN

class Hashtable;

/**
 * <p>
 * <code>PluralFormat</code> supports the creation of internationalized
 * messages with plural inflection. It is based on <i>plural
 * selection</i>, i.e. the caller specifies messages for each
 * plural case that can appear in the user's language and the
 * <code>PluralFormat</code> selects the appropriate message based on
 * the number.
 * </p>
 * <h4>The Problem of Plural Forms in Internationalized Messages</h4>
 * <p>
 * Different languages have different ways to inflect
 * plurals. Creating internationalized messages that include plural
 * forms is only feasible when the framework is able to handle plural
 * forms of <i>all</i> languages correctly. <code>ChoiceFormat</code>
 * doesn't handle this well, because it attaches a number interval to
 * each message and selects the message whose interval contains a
 * given number. This can only handle a finite number of
 * intervals. But in some languages, like Polish, one plural case
 * applies to infinitely many intervals (e.g., the plural case applies to
 * numbers ending with 2, 3, or 4 except those ending with 12, 13, or
 * 14). Thus <code>ChoiceFormat</code> is not adequate.
 * </p><p>
 * <code>PluralFormat</code> deals with this by breaking the problem
 * into two parts:
 * <ul>
 * <li>It uses <code>PluralRules</code> that can define more complex
 *     conditions for a plural case than just a single interval. These plural
 *     rules define both what plural cases exist in a language, and to
 *     which numbers these cases apply.
 * <li>It provides predefined plural rules for many languages. Thus, the programmer
 *     need not worry about the plural cases of a language and
 *     does not have to define the plural cases; they can simply
 *     use the predefined keywords. The whole plural formatting of messages can
 *     be done using localized patterns from resource bundles. For predefined plural
 *     rules, see the CLDR <i>Language Plural Rules</i> page at
 *    http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
 * </ul>
 * </p>
 * <h4>Usage of <code>PluralFormat</code></h4>
 * <p>Note: Typically, plural formatting is done via <code>MessageFormat</code>
 * with a <code>plural</code> argument type,
 * rather than using a stand-alone <code>PluralFormat</code>.
 * </p><p>
 * This discussion assumes that you use <code>PluralFormat</code> with
 * a predefined set of plural rules. You can create one using one of
 * the constructors that takes a <code>locale</code> object. To
 * specify the message pattern, you can either pass it to the
 * constructor or set it explicitly using the
 * <code>applyPattern()</code> method. The <code>format()</code>
 * method takes a number object and selects the message of the
 * matching plural case. This message will be returned.
 * </p>
 * <h5>Patterns and Their Interpretation</h5>
 * <p>
 * The pattern text defines the message output for each plural case of the
 * specified locale. Syntax:
 * <pre>
 * pluralStyle = [offsetValue] (selector '{' message '}')+
 * offsetValue = "offset:" number
 * selector = explicitValue | keyword
 * explicitValue = '=' number  // adjacent, no white space in between
 * keyword = [^[[:Pattern_Syntax:][:Pattern_White_Space:]]]+
 * message: see {@link MessageFormat}
 * </pre>
 * Pattern_White_Space between syntax elements is ignored, except
 * between the {curly braces} and their sub-message,
 * and between the '=' and the number of an explicitValue.
 *
 * </p><p>
 * There are 6 predefined casekeyword in CLDR/ICU - 'zero', 'one', 'two', 'few', 'many' and
 * 'other'. You always have to define a message text for the default plural case
 * <code>other</code> which is contained in every rule set.
 * If you do not specify a message text for a particular plural case, the
 * message text of the plural case <code>other</code> gets assigned to this
 * plural case.
 * </p><p>
 * When formatting, the input number is first matched against the explicitValue clauses.
 * If there is no exact-number match, then a keyword is selected by calling
 * the <code>PluralRules</code> with the input number <em>minus the offset</em>.
 * (The offset defaults to 0 if it is omitted from the pattern string.)
 * If there is no clause with that keyword, then the "other" clauses is returned.
 * </p><p>
 * An unquoted pound sign (<code>#</code>) in the selected sub-message
 * itself (i.e., outside of arguments nested in the sub-message)
 * is replaced by the input number minus the offset.
 * The number-minus-offset value is formatted using a
 * <code>NumberFormat</code> for the <code>PluralFormat</code>'s locale. If you
 * need special number formatting, you have to use a <code>MessageFormat</code>
 * and explicitly specify a <code>NumberFormat</code> argument.
 * <strong>Note:</strong> That argument is formatting without subtracting the offset!
 * If you need a custom format and have a non-zero offset, then you need to pass the
 * number-minus-offset value as a separate parameter.
 * </p>
 * For a usage example, see the {@link MessageFormat} class documentation.
 *
 * <h4>Defining Custom Plural Rules</h4>
 * <p>If you need to use <code>PluralFormat</code> with custom rules, you can
 * create a <code>PluralRules</code> object and pass it to
 * <code>PluralFormat</code>'s constructor. If you also specify a locale in this
 * constructor, this locale will be used to format the number in the message
 * texts.
 * </p><p>
 * For more information about <code>PluralRules</code>, see
 * {@link PluralRules}.
 * </p>
 *
 * ported from Java
 * @stable ICU 4.0
 */

class U_I18N_API PluralFormat : public Format {
public:

    /**
     * Creates a new <code>PluralFormat</code> for the default locale.
     * This locale will be used to get the set of plural rules and for standard
     * number formatting.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given locale.
     * @param locale the <code>PluralFormat</code> will be configured with
     *               rules for this locale. This locale will also be used for
     *               standard number formatting.
     * @param status output param set to success/failure code on exit, which
     *               must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const Locale& locale, UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given set of rules.
     * The standard number formatting will be done using the default locale.
     * @param rules   defines the behavior of the <code>PluralFormat</code>
     *                object.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const PluralRules& rules, UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given set of rules.
     * The standard number formatting will be done using the given locale.
     * @param locale  the default number formatting will be done using this
     *                locale.
     * @param rules   defines the behavior of the <code>PluralFormat</code>
     *                object.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const Locale& locale, const PluralRules& rules, UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given pattern string.
     * The default locale will be used to get the set of plural rules and for
     * standard number formatting.
     * @param  pattern the pattern for this <code>PluralFormat</code>.
     *                 errors are returned to status if the pattern is invalid.
     * @param status   output param set to success/failure code on exit, which
     *                 must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const UnicodeString& pattern, UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given pattern string and
     * locale.
     * The locale will be used to get the set of plural rules and for
     * standard number formatting.
     * @param locale   the <code>PluralFormat</code> will be configured with
     *                 rules for this locale. This locale will also be used for
     *                 standard number formatting.
     * @param pattern  the pattern for this <code>PluralFormat</code>.
     *                 errors are returned to status if the pattern is invalid.
     * @param status   output param set to success/failure code on exit, which
     *                 must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const Locale& locale, const UnicodeString& pattern, UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given set of rules, a
     * pattern and a locale.
     * @param rules    defines the behavior of the <code>PluralFormat</code>
     *                 object.
     * @param pattern  the pattern for this <code>PluralFormat</code>.
     *                 errors are returned to status if the pattern is invalid.
     * @param status   output param set to success/failure code on exit, which
     *                 must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const PluralRules& rules,
                 const UnicodeString& pattern,
                 UErrorCode& status);

    /**
     * Creates a new <code>PluralFormat</code> for a given set of rules, a
     * pattern and a locale.
     * @param locale  the <code>PluralFormat</code> will be configured with
     *                rules for this locale. This locale will also be used for
     *                standard number formatting.
     * @param rules   defines the behavior of the <code>PluralFormat</code>
     *                object.
     * @param pattern the pattern for this <code>PluralFormat</code>.
     *                errors are returned to status if the pattern is invalid.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    PluralFormat(const Locale& locale,
                 const PluralRules& rules,
                 const UnicodeString& pattern,
                 UErrorCode& status);

    /**
      * copy constructor.
      * @stable ICU 4.0
      */
    PluralFormat(const PluralFormat& other);

    /**
     * Destructor.
     * @stable ICU 4.0
     */
    virtual ~PluralFormat();

    /**
     * Sets the pattern used by this plural format.
     * The method parses the pattern and creates a map of format strings
     * for the plural rules.
     * Patterns and their interpretation are specified in the class description.
     *
     * @param pattern the pattern for this plural format
     *                errors are returned to status if the pattern is invalid.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    void applyPattern(const UnicodeString& pattern, UErrorCode& status);


    using Format::format;

    /**
     * Formats a plural message for a given number.
     *
     * @param number  a number for which the plural message should be formatted
     *                for. If no pattern has been applied to this
     *                <code>PluralFormat</code> object yet, the formatted number
     *                will be returned.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @return        the string containing the formatted plural message.
     * @stable ICU 4.0
     */
    UnicodeString format(int32_t number, UErrorCode& status) const;

    /**
     * Formats a plural message for a given number.
     *
     * @param number  a number for which the plural message should be formatted
     *                for. If no pattern has been applied to this
     *                PluralFormat object yet, the formatted number
     *                will be returned.
     * @param status  output param set to success or failure code on exit, which
     *                must not indicate a failure before the function call.
     * @return        the string containing the formatted plural message.
     * @stable ICU 4.0
     */
    UnicodeString format(double number, UErrorCode& status) const;

    /**
     * Formats a plural message for a given number.
     *
     * @param number   a number for which the plural message should be formatted
     *                 for. If no pattern has been applied to this
     *                 <code>PluralFormat</code> object yet, the formatted number
     *                 will be returned.
     * @param appendTo output parameter to receive result.
     *                 result is appended to existing contents.
     * @param pos      On input: an alignment field, if desired.
     *                 On output: the offsets of the alignment field.
     * @param status   output param set to success/failure code on exit, which
     *                 must not indicate a failure before the function call.
     * @return         the string containing the formatted plural message.
     * @stable ICU 4.0
     */
    UnicodeString& format(int32_t number,
                          UnicodeString& appendTo,
                          FieldPosition& pos,
                          UErrorCode& status) const;

    /**
     * Formats a plural message for a given number.
     *
     * @param number   a number for which the plural message should be formatted
     *                 for. If no pattern has been applied to this
     *                 PluralFormat object yet, the formatted number
     *                 will be returned.
     * @param appendTo output parameter to receive result.
     *                 result is appended to existing contents.
     * @param pos      On input: an alignment field, if desired.
     *                 On output: the offsets of the alignment field.
     * @param status   output param set to success/failure code on exit, which
     *                 must not indicate a failure before the function call.
     * @return         the string containing the formatted plural message.
     * @stable ICU 4.0
     */
    UnicodeString& format(double number,
                          UnicodeString& appendTo,
                          FieldPosition& pos,
                          UErrorCode& status) const;

    /**
     * Sets the locale used by this <code>PluraFormat</code> object.
     * Note: Calling this method resets this <code>PluraFormat</code> object,
     *     i.e., a pattern that was applied previously will be removed,
     *     and the NumberFormat is set to the default number format for
     *     the locale.  The resulting format behaves the same as one
     *     constructed from {@link #PluralFormat(const Locale& locale, UErrorCode& status)}.
     * @param locale  the <code>locale</code> to use to configure the formatter.
     * @param status  output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @stable ICU 4.0
     */
    void setLocale(const Locale& locale, UErrorCode& status);

    /**
      * Sets the number format used by this formatter.  You only need to
      * call this if you want a different number format than the default
      * formatter for the locale.
      * @param format  the number format to use.
      * @param status  output param set to success/failure code on exit, which
      *                must not indicate a failure before the function call.
      * @stable ICU 4.0
      */
    void setNumberFormat(const NumberFormat* format, UErrorCode& status);

    /**
       * Assignment operator
       *
       * @param other    the PluralFormat object to copy from.
       * @stable ICU 4.0
       */
    PluralFormat& operator=(const PluralFormat& other);

    /**
      * Return true if another object is semantically equal to this one.
      *
      * @param other    the PluralFormat object to be compared with.
      * @return         true if other is semantically equal to this.
      * @stable ICU 4.0
      */
    virtual UBool operator==(const Format& other) const;

    /**
     * Return true if another object is semantically unequal to this one.
     *
     * @param other    the PluralFormat object to be compared with.
     * @return         true if other is semantically unequal to this.
     * @stable ICU 4.0
     */
    virtual UBool operator!=(const Format& other) const;

    /**
     * Clones this Format object polymorphically.  The caller owns the
     * result and should delete it when done.
     * @stable ICU 4.0
     */
    virtual Format* clone(void) const;

    /**
    * Redeclared Format method.
    *
    * @param obj       The object to be formatted into a string.
    * @param appendTo  output parameter to receive result.
    *                  Result is appended to existing contents.
    * @param pos       On input: an alignment field, if desired.
    *                  On output: the offsets of the alignment field.
    * @param status    output param filled with success/failure status.
    * @return          Reference to 'appendTo' parameter.
    * @stable ICU 4.0
    */
   UnicodeString& format(const Formattable& obj,
                         UnicodeString& appendTo,
                         FieldPosition& pos,
                         UErrorCode& status) const;

   /**
    * Returns the pattern from applyPattern() or constructor().
    *
    * @param  appendTo  output parameter to receive result.
     *                  Result is appended to existing contents.
    * @return the UnicodeString with inserted pattern.
    * @stable ICU 4.0
    */
   UnicodeString& toPattern(UnicodeString& appendTo);

   /**
    * This method is not yet supported by <code>PluralFormat</code>.
    * <P>
    * Before calling, set parse_pos.index to the offset you want to start
    * parsing at in the source. After calling, parse_pos.index is the end of
    * the text you parsed. If error occurs, index is unchanged.
    * <P>
    * When parsing, leading whitespace is discarded (with a successful parse),
    * while trailing whitespace is left as is.
    * <P>
    * See Format::parseObject() for more.
    *
    * @param source    The string to be parsed into an object.
    * @param result    Formattable to be set to the parse result.
    *                  If parse fails, return contents are undefined.
    * @param parse_pos The position to start parsing at. Upon return
    *                  this param is set to the position after the
    *                  last character successfully parsed. If the
    *                  source is not parsed successfully, this param
    *                  will remain unchanged.
    * @stable ICU 4.0
    */
   virtual void parseObject(const UnicodeString& source,
                            Formattable& result,
                            ParsePosition& parse_pos) const;

    /**
     * ICU "poor man's RTTI", returns a UClassID for this class.
     *
     * @stable ICU 4.0
     *
     */
    static UClassID U_EXPORT2 getStaticClassID(void);

    /**
     * ICU "poor man's RTTI", returns a UClassID for the actual class.
     *
     * @stable ICU 4.0
     */
     virtual UClassID getDynamicClassID() const;

  private:

     /**
      * @internal 
      */
    class U_I18N_API PluralSelector : public UMemory {
      public:
        /**
         * Given a number, returns the appropriate PluralFormat keyword.
         *
         * @param number The number to be plural-formatted.
         * @param ec Error code.
         * @return The selected PluralFormat keyword.
         */
        virtual UnicodeString select(double number, UErrorCode& ec) const = 0;
    };

    /**
     * @internal
     */
    class U_I18N_API PluralSelectorAdapter : public PluralSelector {
      public:
        PluralSelectorAdapter() : pluralRules(NULL) {
        }

        virtual ~PluralSelectorAdapter();

        virtual UnicodeString select(double number, UErrorCode& /*ec*/) const;

        void reset();

        PluralRules* pluralRules;
    };

    Locale  locale;
    MessagePattern msgPattern;
    NumberFormat*  numberFormat;
    double offset;
    PluralSelectorAdapter pluralRulesWrapper;

    PluralFormat();   // default constructor not implemented
    void init(const PluralRules* rules, UErrorCode& status);
    /**
     * Copies dynamically allocated values (pointer fields).
     * Others are copied using their copy constructors and assignment operators.
     */
    void copyObjects(const PluralFormat& other);

    /**
     * Finds the PluralFormat sub-message for the given number, or the "other" sub-message.
     * @param pattern A MessagePattern.
     * @param partIndex the index of the first PluralFormat argument style part.
     * @param selector the PluralSelector for mapping the number (minus offset) to a keyword.
     * @param number a number to be matched to one of the PluralFormat argument's explicit values,
     *        or mapped via the PluralSelector.
     * @param ec ICU error code.
     * @return the sub-message start part index.
     */
    static int32_t findSubMessage(
         const MessagePattern& pattern, int32_t partIndex,
         const PluralSelector& selector, double number, UErrorCode& ec);

    friend class MessageFormat;
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif // _PLURFMT
//eof