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comparison: intl/icu/source/i18n/msgfmt.cpp

intl/icu/source/i18n/msgfmt.cpp

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1 /********************************************************************
2 * COPYRIGHT:
3 * Copyright (c) 1997-2013, International Business Machines Corporation and
4 * others. All Rights Reserved.
5 ********************************************************************
6 *
7 * File MSGFMT.CPP
8 *
9 * Modification History:
10 *
11 * Date Name Description
12 * 02/19/97 aliu Converted from java.
13 * 03/20/97 helena Finished first cut of implementation.
14 * 04/10/97 aliu Made to work on AIX. Added stoi to replace wtoi.
15 * 06/11/97 helena Fixed addPattern to take the pattern correctly.
16 * 06/17/97 helena Fixed the getPattern to return the correct pattern.
17 * 07/09/97 helena Made ParsePosition into a class.
18 * 02/22/99 stephen Removed character literals for EBCDIC safety
19 * 11/01/09 kirtig Added SelectFormat
20 ********************************************************************/
21
22 #include "unicode/utypes.h"
23
24 #if !UCONFIG_NO_FORMATTING
25
26 #include "unicode/appendable.h"
27 #include "unicode/choicfmt.h"
28 #include "unicode/datefmt.h"
29 #include "unicode/decimfmt.h"
30 #include "unicode/localpointer.h"
31 #include "unicode/msgfmt.h"
32 #include "unicode/plurfmt.h"
33 #include "unicode/rbnf.h"
34 #include "unicode/selfmt.h"
35 #include "unicode/smpdtfmt.h"
36 #include "unicode/umsg.h"
37 #include "unicode/ustring.h"
38 #include "cmemory.h"
39 #include "patternprops.h"
40 #include "messageimpl.h"
41 #include "msgfmt_impl.h"
42 #include "plurrule_impl.h"
43 #include "uassert.h"
44 #include "uelement.h"
45 #include "uhash.h"
46 #include "ustrfmt.h"
47 #include "util.h"
48 #include "uvector.h"
49
50 // *****************************************************************************
51 // class MessageFormat
52 // *****************************************************************************
53
54 #define SINGLE_QUOTE ((UChar)0x0027)
55 #define COMMA ((UChar)0x002C)
56 #define LEFT_CURLY_BRACE ((UChar)0x007B)
57 #define RIGHT_CURLY_BRACE ((UChar)0x007D)
58
59 //---------------------------------------
60 // static data
61
62 static const UChar ID_NUMBER[] = {
63 0x6E, 0x75, 0x6D, 0x62, 0x65, 0x72, 0 /* "number" */
64 };
65 static const UChar ID_DATE[] = {
66 0x64, 0x61, 0x74, 0x65, 0 /* "date" */
67 };
68 static const UChar ID_TIME[] = {
69 0x74, 0x69, 0x6D, 0x65, 0 /* "time" */
70 };
71 static const UChar ID_SPELLOUT[] = {
72 0x73, 0x70, 0x65, 0x6c, 0x6c, 0x6f, 0x75, 0x74, 0 /* "spellout" */
73 };
74 static const UChar ID_ORDINAL[] = {
75 0x6f, 0x72, 0x64, 0x69, 0x6e, 0x61, 0x6c, 0 /* "ordinal" */
76 };
77 static const UChar ID_DURATION[] = {
78 0x64, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0 /* "duration" */
79 };
80
81 // MessageFormat Type List Number, Date, Time or Choice
82 static const UChar * const TYPE_IDS[] = {
83 ID_NUMBER,
84 ID_DATE,
85 ID_TIME,
86 ID_SPELLOUT,
87 ID_ORDINAL,
88 ID_DURATION,
89 NULL,
90 };
91
92 static const UChar ID_EMPTY[] = {
93 0 /* empty string, used for default so that null can mark end of list */
94 };
95 static const UChar ID_CURRENCY[] = {
96 0x63, 0x75, 0x72, 0x72, 0x65, 0x6E, 0x63, 0x79, 0 /* "currency" */
97 };
98 static const UChar ID_PERCENT[] = {
99 0x70, 0x65, 0x72, 0x63, 0x65, 0x6E, 0x74, 0 /* "percent" */
100 };
101 static const UChar ID_INTEGER[] = {
102 0x69, 0x6E, 0x74, 0x65, 0x67, 0x65, 0x72, 0 /* "integer" */
103 };
104
105 // NumberFormat modifier list, default, currency, percent or integer
106 static const UChar * const NUMBER_STYLE_IDS[] = {
107 ID_EMPTY,
108 ID_CURRENCY,
109 ID_PERCENT,
110 ID_INTEGER,
111 NULL,
112 };
113
114 static const UChar ID_SHORT[] = {
115 0x73, 0x68, 0x6F, 0x72, 0x74, 0 /* "short" */
116 };
117 static const UChar ID_MEDIUM[] = {
118 0x6D, 0x65, 0x64, 0x69, 0x75, 0x6D, 0 /* "medium" */
119 };
120 static const UChar ID_LONG[] = {
121 0x6C, 0x6F, 0x6E, 0x67, 0 /* "long" */
122 };
123 static const UChar ID_FULL[] = {
124 0x66, 0x75, 0x6C, 0x6C, 0 /* "full" */
125 };
126
127 // DateFormat modifier list, default, short, medium, long or full
128 static const UChar * const DATE_STYLE_IDS[] = {
129 ID_EMPTY,
130 ID_SHORT,
131 ID_MEDIUM,
132 ID_LONG,
133 ID_FULL,
134 NULL,
135 };
136
137 static const icu::DateFormat::EStyle DATE_STYLES[] = {
138 icu::DateFormat::kDefault,
139 icu::DateFormat::kShort,
140 icu::DateFormat::kMedium,
141 icu::DateFormat::kLong,
142 icu::DateFormat::kFull,
143 };
144
145 static const int32_t DEFAULT_INITIAL_CAPACITY = 10;
146
147 static const UChar NULL_STRING[] = {
148 0x6E, 0x75, 0x6C, 0x6C, 0 // "null"
149 };
150
151 static const UChar OTHER_STRING[] = {
152 0x6F, 0x74, 0x68, 0x65, 0x72, 0 // "other"
153 };
154
155 U_CDECL_BEGIN
156 static UBool U_CALLCONV equalFormatsForHash(const UHashTok key1,
157 const UHashTok key2) {
158 return icu::MessageFormat::equalFormats(key1.pointer, key2.pointer);
159 }
160
161 U_CDECL_END
162
163 U_NAMESPACE_BEGIN
164
165 // -------------------------------------
166 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(MessageFormat)
167 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FormatNameEnumeration)
168
169 //--------------------------------------------------------------------
170
171 /**
172 * Convert an integer value to a string and append the result to
173 * the given UnicodeString.
174 */
175 static UnicodeString& itos(int32_t i, UnicodeString& appendTo) {
176 UChar temp[16];
177 uprv_itou(temp,16,i,10,0); // 10 == radix
178 appendTo.append(temp, -1);
179 return appendTo;
180 }
181
182
183 // AppendableWrapper: encapsulates the result of formatting, keeping track
184 // of the string and its length.
185 class AppendableWrapper : public UMemory {
186 public:
187 AppendableWrapper(Appendable& appendable) : app(appendable), len(0) {
188 }
189 void append(const UnicodeString& s) {
190 app.appendString(s.getBuffer(), s.length());
191 len += s.length();
192 }
193 void append(const UChar* s, const int32_t sLength) {
194 app.appendString(s, sLength);
195 len += sLength;
196 }
197 void append(const UnicodeString& s, int32_t start, int32_t length) {
198 append(s.tempSubString(start, length));
199 }
200 void formatAndAppend(const Format* formatter, const Formattable& arg, UErrorCode& ec) {
201 UnicodeString s;
202 formatter->format(arg, s, ec);
203 if (U_SUCCESS(ec)) {
204 append(s);
205 }
206 }
207 void formatAndAppend(const Format* formatter, const Formattable& arg,
208 const UnicodeString &argString, UErrorCode& ec) {
209 if (!argString.isEmpty()) {
210 if (U_SUCCESS(ec)) {
211 append(argString);
212 }
213 } else {
214 formatAndAppend(formatter, arg, ec);
215 }
216 }
217 int32_t length() {
218 return len;
219 }
220 private:
221 Appendable& app;
222 int32_t len;
223 };
224
225
226 // -------------------------------------
227 // Creates a MessageFormat instance based on the pattern.
228
229 MessageFormat::MessageFormat(const UnicodeString& pattern,
230 UErrorCode& success)
231 : fLocale(Locale::getDefault()), // Uses the default locale
232 msgPattern(success),
233 formatAliases(NULL),
234 formatAliasesCapacity(0),
235 argTypes(NULL),
236 argTypeCount(0),
237 argTypeCapacity(0),
238 hasArgTypeConflicts(FALSE),
239 defaultNumberFormat(NULL),
240 defaultDateFormat(NULL),
241 cachedFormatters(NULL),
242 customFormatArgStarts(NULL),
243 pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
244 ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
245 {
246 setLocaleIDs(fLocale.getName(), fLocale.getName());
247 applyPattern(pattern, success);
248 }
249
250 MessageFormat::MessageFormat(const UnicodeString& pattern,
251 const Locale& newLocale,
252 UErrorCode& success)
253 : fLocale(newLocale),
254 msgPattern(success),
255 formatAliases(NULL),
256 formatAliasesCapacity(0),
257 argTypes(NULL),
258 argTypeCount(0),
259 argTypeCapacity(0),
260 hasArgTypeConflicts(FALSE),
261 defaultNumberFormat(NULL),
262 defaultDateFormat(NULL),
263 cachedFormatters(NULL),
264 customFormatArgStarts(NULL),
265 pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
266 ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
267 {
268 setLocaleIDs(fLocale.getName(), fLocale.getName());
269 applyPattern(pattern, success);
270 }
271
272 MessageFormat::MessageFormat(const UnicodeString& pattern,
273 const Locale& newLocale,
274 UParseError& parseError,
275 UErrorCode& success)
276 : fLocale(newLocale),
277 msgPattern(success),
278 formatAliases(NULL),
279 formatAliasesCapacity(0),
280 argTypes(NULL),
281 argTypeCount(0),
282 argTypeCapacity(0),
283 hasArgTypeConflicts(FALSE),
284 defaultNumberFormat(NULL),
285 defaultDateFormat(NULL),
286 cachedFormatters(NULL),
287 customFormatArgStarts(NULL),
288 pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
289 ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
290 {
291 setLocaleIDs(fLocale.getName(), fLocale.getName());
292 applyPattern(pattern, parseError, success);
293 }
294
295 MessageFormat::MessageFormat(const MessageFormat& that)
296 :
297 Format(that),
298 fLocale(that.fLocale),
299 msgPattern(that.msgPattern),
300 formatAliases(NULL),
301 formatAliasesCapacity(0),
302 argTypes(NULL),
303 argTypeCount(0),
304 argTypeCapacity(0),
305 hasArgTypeConflicts(that.hasArgTypeConflicts),
306 defaultNumberFormat(NULL),
307 defaultDateFormat(NULL),
308 cachedFormatters(NULL),
309 customFormatArgStarts(NULL),
310 pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
311 ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
312 {
313 // This will take care of creating the hash tables (since they are NULL).
314 UErrorCode ec = U_ZERO_ERROR;
315 copyObjects(that, ec);
316 if (U_FAILURE(ec)) {
317 resetPattern();
318 }
319 }
320
321 MessageFormat::~MessageFormat()
322 {
323 uhash_close(cachedFormatters);
324 uhash_close(customFormatArgStarts);
325
326 uprv_free(argTypes);
327 uprv_free(formatAliases);
328 delete defaultNumberFormat;
329 delete defaultDateFormat;
330 }
331
332 //--------------------------------------------------------------------
333 // Variable-size array management
334
335 /**
336 * Allocate argTypes[] to at least the given capacity and return
337 * TRUE if successful. If not, leave argTypes[] unchanged.
338 *
339 * If argTypes is NULL, allocate it. If it is not NULL, enlarge it
340 * if necessary to be at least as large as specified.
341 */
342 UBool MessageFormat::allocateArgTypes(int32_t capacity, UErrorCode& status) {
343 if (U_FAILURE(status)) {
344 return FALSE;
345 }
346 if (argTypeCapacity >= capacity) {
347 return TRUE;
348 }
349 if (capacity < DEFAULT_INITIAL_CAPACITY) {
350 capacity = DEFAULT_INITIAL_CAPACITY;
351 } else if (capacity < 2*argTypeCapacity) {
352 capacity = 2*argTypeCapacity;
353 }
354 Formattable::Type* a = (Formattable::Type*)
355 uprv_realloc(argTypes, sizeof(*argTypes) * capacity);
356 if (a == NULL) {
357 status = U_MEMORY_ALLOCATION_ERROR;
358 return FALSE;
359 }
360 argTypes = a;
361 argTypeCapacity = capacity;
362 return TRUE;
363 }
364
365 // -------------------------------------
366 // assignment operator
367
368 const MessageFormat&
369 MessageFormat::operator=(const MessageFormat& that)
370 {
371 if (this != &that) {
372 // Calls the super class for assignment first.
373 Format::operator=(that);
374
375 setLocale(that.fLocale);
376 msgPattern = that.msgPattern;
377 hasArgTypeConflicts = that.hasArgTypeConflicts;
378
379 UErrorCode ec = U_ZERO_ERROR;
380 copyObjects(that, ec);
381 if (U_FAILURE(ec)) {
382 resetPattern();
383 }
384 }
385 return *this;
386 }
387
388 UBool
389 MessageFormat::operator==(const Format& rhs) const
390 {
391 if (this == &rhs) return TRUE;
392
393 MessageFormat& that = (MessageFormat&)rhs;
394
395 // Check class ID before checking MessageFormat members
396 if (!Format::operator==(rhs) ||
397 msgPattern != that.msgPattern ||
398 fLocale != that.fLocale) {
399 return FALSE;
400 }
401
402 // Compare hashtables.
403 if ((customFormatArgStarts == NULL) != (that.customFormatArgStarts == NULL)) {
404 return FALSE;
405 }
406 if (customFormatArgStarts == NULL) {
407 return TRUE;
408 }
409
410 UErrorCode ec = U_ZERO_ERROR;
411 const int32_t count = uhash_count(customFormatArgStarts);
412 const int32_t rhs_count = uhash_count(that.customFormatArgStarts);
413 if (count != rhs_count) {
414 return FALSE;
415 }
416 int32_t idx = 0, rhs_idx = 0, pos = -1, rhs_pos = -1;
417 for (; idx < count && rhs_idx < rhs_count && U_SUCCESS(ec); ++idx, ++rhs_idx) {
418 const UHashElement* cur = uhash_nextElement(customFormatArgStarts, &pos);
419 const UHashElement* rhs_cur = uhash_nextElement(that.customFormatArgStarts, &rhs_pos);
420 if (cur->key.integer != rhs_cur->key.integer) {
421 return FALSE;
422 }
423 const Format* format = (const Format*)uhash_iget(cachedFormatters, cur->key.integer);
424 const Format* rhs_format = (const Format*)uhash_iget(that.cachedFormatters, rhs_cur->key.integer);
425 if (*format != *rhs_format) {
426 return FALSE;
427 }
428 }
429 return TRUE;
430 }
431
432 // -------------------------------------
433 // Creates a copy of this MessageFormat, the caller owns the copy.
434
435 Format*
436 MessageFormat::clone() const
437 {
438 return new MessageFormat(*this);
439 }
440
441 // -------------------------------------
442 // Sets the locale of this MessageFormat object to theLocale.
443
444 void
445 MessageFormat::setLocale(const Locale& theLocale)
446 {
447 if (fLocale != theLocale) {
448 delete defaultNumberFormat;
449 defaultNumberFormat = NULL;
450 delete defaultDateFormat;
451 defaultDateFormat = NULL;
452 fLocale = theLocale;
453 setLocaleIDs(fLocale.getName(), fLocale.getName());
454 pluralProvider.reset();
455 ordinalProvider.reset();
456 }
457 }
458
459 // -------------------------------------
460 // Gets the locale of this MessageFormat object.
461
462 const Locale&
463 MessageFormat::getLocale() const
464 {
465 return fLocale;
466 }
467
468 void
469 MessageFormat::applyPattern(const UnicodeString& newPattern,
470 UErrorCode& status)
471 {
472 UParseError parseError;
473 applyPattern(newPattern,parseError,status);
474 }
475
476
477 // -------------------------------------
478 // Applies the new pattern and returns an error if the pattern
479 // is not correct.
480 void
481 MessageFormat::applyPattern(const UnicodeString& pattern,
482 UParseError& parseError,
483 UErrorCode& ec)
484 {
485 if(U_FAILURE(ec)) {
486 return;
487 }
488 msgPattern.parse(pattern, &parseError, ec);
489 cacheExplicitFormats(ec);
490
491 if (U_FAILURE(ec)) {
492 resetPattern();
493 }
494 }
495
496 void MessageFormat::resetPattern() {
497 msgPattern.clear();
498 uhash_close(cachedFormatters);
499 cachedFormatters = NULL;
500 uhash_close(customFormatArgStarts);
501 customFormatArgStarts = NULL;
502 argTypeCount = 0;
503 hasArgTypeConflicts = FALSE;
504 }
505
506 void
507 MessageFormat::applyPattern(const UnicodeString& pattern,
508 UMessagePatternApostropheMode aposMode,
509 UParseError* parseError,
510 UErrorCode& status) {
511 if (aposMode != msgPattern.getApostropheMode()) {
512 msgPattern.clearPatternAndSetApostropheMode(aposMode);
513 }
514 applyPattern(pattern, *parseError, status);
515 }
516
517 // -------------------------------------
518 // Converts this MessageFormat instance to a pattern.
519
520 UnicodeString&
521 MessageFormat::toPattern(UnicodeString& appendTo) const {
522 if ((customFormatArgStarts != NULL && 0 != uhash_count(customFormatArgStarts)) ||
523 0 == msgPattern.countParts()
524 ) {
525 appendTo.setToBogus();
526 return appendTo;
527 }
528 return appendTo.append(msgPattern.getPatternString());
529 }
530
531 int32_t MessageFormat::nextTopLevelArgStart(int32_t partIndex) const {
532 if (partIndex != 0) {
533 partIndex = msgPattern.getLimitPartIndex(partIndex);
534 }
535 for (;;) {
536 UMessagePatternPartType type = msgPattern.getPartType(++partIndex);
537 if (type == UMSGPAT_PART_TYPE_ARG_START) {
538 return partIndex;
539 }
540 if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
541 return -1;
542 }
543 }
544 }
545
546 void MessageFormat::setArgStartFormat(int32_t argStart,
547 Format* formatter,
548 UErrorCode& status) {
549 if (U_FAILURE(status)) {
550 delete formatter;
551 return;
552 }
553 if (cachedFormatters == NULL) {
554 cachedFormatters=uhash_open(uhash_hashLong, uhash_compareLong,
555 equalFormatsForHash, &status);
556 if (U_FAILURE(status)) {
557 delete formatter;
558 return;
559 }
560 uhash_setValueDeleter(cachedFormatters, uprv_deleteUObject);
561 }
562 if (formatter == NULL) {
563 formatter = new DummyFormat();
564 }
565 uhash_iput(cachedFormatters, argStart, formatter, &status);
566 }
567
568
569 UBool MessageFormat::argNameMatches(int32_t partIndex, const UnicodeString& argName, int32_t argNumber) {
570 const MessagePattern::Part& part = msgPattern.getPart(partIndex);
571 return part.getType() == UMSGPAT_PART_TYPE_ARG_NAME ?
572 msgPattern.partSubstringMatches(part, argName) :
573 part.getValue() == argNumber; // ARG_NUMBER
574 }
575
576 // Sets a custom formatter for a MessagePattern ARG_START part index.
577 // "Custom" formatters are provided by the user via setFormat() or similar APIs.
578 void MessageFormat::setCustomArgStartFormat(int32_t argStart,
579 Format* formatter,
580 UErrorCode& status) {
581 setArgStartFormat(argStart, formatter, status);
582 if (customFormatArgStarts == NULL) {
583 customFormatArgStarts=uhash_open(uhash_hashLong, uhash_compareLong,
584 NULL, &status);
585 }
586 uhash_iputi(customFormatArgStarts, argStart, 1, &status);
587 }
588
589 Format* MessageFormat::getCachedFormatter(int32_t argumentNumber) const {
590 if (cachedFormatters == NULL) {
591 return NULL;
592 }
593 void* ptr = uhash_iget(cachedFormatters, argumentNumber);
594 if (ptr != NULL && dynamic_cast<DummyFormat*>((Format*)ptr) == NULL) {
595 return (Format*) ptr;
596 } else {
597 // Not cached, or a DummyFormat representing setFormat(NULL).
598 return NULL;
599 }
600 }
601
602 // -------------------------------------
603 // Adopts the new formats array and updates the array count.
604 // This MessageFormat instance owns the new formats.
605 void
606 MessageFormat::adoptFormats(Format** newFormats,
607 int32_t count) {
608 if (newFormats == NULL || count < 0) {
609 return;
610 }
611 // Throw away any cached formatters.
612 if (cachedFormatters != NULL) {
613 uhash_removeAll(cachedFormatters);
614 }
615 if (customFormatArgStarts != NULL) {
616 uhash_removeAll(customFormatArgStarts);
617 }
618
619 int32_t formatNumber = 0;
620 UErrorCode status = U_ZERO_ERROR;
621 for (int32_t partIndex = 0;
622 formatNumber < count && U_SUCCESS(status) &&
623 (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
624 setCustomArgStartFormat(partIndex, newFormats[formatNumber], status);
625 ++formatNumber;
626 }
627 // Delete those that didn't get used (if any).
628 for (; formatNumber < count; ++formatNumber) {
629 delete newFormats[formatNumber];
630 }
631
632 }
633
634 // -------------------------------------
635 // Sets the new formats array and updates the array count.
636 // This MessageFormat instance maks a copy of the new formats.
637
638 void
639 MessageFormat::setFormats(const Format** newFormats,
640 int32_t count) {
641 if (newFormats == NULL || count < 0) {
642 return;
643 }
644 // Throw away any cached formatters.
645 if (cachedFormatters != NULL) {
646 uhash_removeAll(cachedFormatters);
647 }
648 if (customFormatArgStarts != NULL) {
649 uhash_removeAll(customFormatArgStarts);
650 }
651
652 UErrorCode status = U_ZERO_ERROR;
653 int32_t formatNumber = 0;
654 for (int32_t partIndex = 0;
655 formatNumber < count && U_SUCCESS(status) && (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
656 Format* newFormat = NULL;
657 if (newFormats[formatNumber] != NULL) {
658 newFormat = newFormats[formatNumber]->clone();
659 if (newFormat == NULL) {
660 status = U_MEMORY_ALLOCATION_ERROR;
661 }
662 }
663 setCustomArgStartFormat(partIndex, newFormat, status);
664 ++formatNumber;
665 }
666 if (U_FAILURE(status)) {
667 resetPattern();
668 }
669 }
670
671 // -------------------------------------
672 // Adopt a single format by format number.
673 // Do nothing if the format number is not less than the array count.
674
675 void
676 MessageFormat::adoptFormat(int32_t n, Format *newFormat) {
677 LocalPointer<Format> p(newFormat);
678 if (n >= 0) {
679 int32_t formatNumber = 0;
680 for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
681 if (n == formatNumber) {
682 UErrorCode status = U_ZERO_ERROR;
683 setCustomArgStartFormat(partIndex, p.orphan(), status);
684 return;
685 }
686 ++formatNumber;
687 }
688 }
689 }
690
691 // -------------------------------------
692 // Adopt a single format by format name.
693 // Do nothing if there is no match of formatName.
694 void
695 MessageFormat::adoptFormat(const UnicodeString& formatName,
696 Format* formatToAdopt,
697 UErrorCode& status) {
698 LocalPointer<Format> p(formatToAdopt);
699 if (U_FAILURE(status)) {
700 return;
701 }
702 int32_t argNumber = MessagePattern::validateArgumentName(formatName);
703 if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
704 status = U_ILLEGAL_ARGUMENT_ERROR;
705 return;
706 }
707 for (int32_t partIndex = 0;
708 (partIndex = nextTopLevelArgStart(partIndex)) >= 0 && U_SUCCESS(status);
709 ) {
710 if (argNameMatches(partIndex + 1, formatName, argNumber)) {
711 Format* f;
712 if (p.isValid()) {
713 f = p.orphan();
714 } else if (formatToAdopt == NULL) {
715 f = NULL;
716 } else {
717 f = formatToAdopt->clone();
718 if (f == NULL) {
719 status = U_MEMORY_ALLOCATION_ERROR;
720 return;
721 }
722 }
723 setCustomArgStartFormat(partIndex, f, status);
724 }
725 }
726 }
727
728 // -------------------------------------
729 // Set a single format.
730 // Do nothing if the variable is not less than the array count.
731 void
732 MessageFormat::setFormat(int32_t n, const Format& newFormat) {
733
734 if (n >= 0) {
735 int32_t formatNumber = 0;
736 for (int32_t partIndex = 0;
737 (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
738 if (n == formatNumber) {
739 Format* new_format = newFormat.clone();
740 if (new_format) {
741 UErrorCode status = U_ZERO_ERROR;
742 setCustomArgStartFormat(partIndex, new_format, status);
743 }
744 return;
745 }
746 ++formatNumber;
747 }
748 }
749 }
750
751 // -------------------------------------
752 // Get a single format by format name.
753 // Do nothing if the variable is not less than the array count.
754 Format *
755 MessageFormat::getFormat(const UnicodeString& formatName, UErrorCode& status) {
756 if (U_FAILURE(status) || cachedFormatters == NULL) return NULL;
757
758 int32_t argNumber = MessagePattern::validateArgumentName(formatName);
759 if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
760 status = U_ILLEGAL_ARGUMENT_ERROR;
761 return NULL;
762 }
763 for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
764 if (argNameMatches(partIndex + 1, formatName, argNumber)) {
765 return getCachedFormatter(partIndex);
766 }
767 }
768 return NULL;
769 }
770
771 // -------------------------------------
772 // Set a single format by format name
773 // Do nothing if the variable is not less than the array count.
774 void
775 MessageFormat::setFormat(const UnicodeString& formatName,
776 const Format& newFormat,
777 UErrorCode& status) {
778 if (U_FAILURE(status)) return;
779
780 int32_t argNumber = MessagePattern::validateArgumentName(formatName);
781 if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
782 status = U_ILLEGAL_ARGUMENT_ERROR;
783 return;
784 }
785 for (int32_t partIndex = 0;
786 (partIndex = nextTopLevelArgStart(partIndex)) >= 0 && U_SUCCESS(status);
787 ) {
788 if (argNameMatches(partIndex + 1, formatName, argNumber)) {
789 if (&newFormat == NULL) {
790 setCustomArgStartFormat(partIndex, NULL, status);
791 } else {
792 Format* new_format = newFormat.clone();
793 if (new_format == NULL) {
794 status = U_MEMORY_ALLOCATION_ERROR;
795 return;
796 }
797 setCustomArgStartFormat(partIndex, new_format, status);
798 }
799 }
800 }
801 }
802
803 // -------------------------------------
804 // Gets the format array.
805 const Format**
806 MessageFormat::getFormats(int32_t& cnt) const
807 {
808 // This old API returns an array (which we hold) of Format*
809 // pointers. The array is valid up to the next call to any
810 // method on this object. We construct and resize an array
811 // on demand that contains aliases to the subformats[i].format
812 // pointers.
813 MessageFormat* t = const_cast<MessageFormat*> (this);
814 cnt = 0;
815 if (formatAliases == NULL) {
816 t->formatAliasesCapacity = (argTypeCount<10) ? 10 : argTypeCount;
817 Format** a = (Format**)
818 uprv_malloc(sizeof(Format*) * formatAliasesCapacity);
819 if (a == NULL) {
820 t->formatAliasesCapacity = 0;
821 return NULL;
822 }
823 t->formatAliases = a;
824 } else if (argTypeCount > formatAliasesCapacity) {
825 Format** a = (Format**)
826 uprv_realloc(formatAliases, sizeof(Format*) * argTypeCount);
827 if (a == NULL) {
828 t->formatAliasesCapacity = 0;
829 return NULL;
830 }
831 t->formatAliases = a;
832 t->formatAliasesCapacity = argTypeCount;
833 }
834
835 for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
836 t->formatAliases[cnt++] = getCachedFormatter(partIndex);
837 }
838
839 return (const Format**)formatAliases;
840 }
841
842
843 UnicodeString MessageFormat::getArgName(int32_t partIndex) {
844 const MessagePattern::Part& part = msgPattern.getPart(partIndex);
845 return msgPattern.getSubstring(part);
846 }
847
848 StringEnumeration*
849 MessageFormat::getFormatNames(UErrorCode& status) {
850 if (U_FAILURE(status)) return NULL;
851
852 UVector *fFormatNames = new UVector(status);
853 if (U_FAILURE(status)) {
854 status = U_MEMORY_ALLOCATION_ERROR;
855 return NULL;
856 }
857 fFormatNames->setDeleter(uprv_deleteUObject);
858
859 for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
860 fFormatNames->addElement(new UnicodeString(getArgName(partIndex + 1)), status);
861 }
862
863 StringEnumeration* nameEnumerator = new FormatNameEnumeration(fFormatNames, status);
864 return nameEnumerator;
865 }
866
867 // -------------------------------------
868 // Formats the source Formattable array and copy into the result buffer.
869 // Ignore the FieldPosition result for error checking.
870
871 UnicodeString&
872 MessageFormat::format(const Formattable* source,
873 int32_t cnt,
874 UnicodeString& appendTo,
875 FieldPosition& ignore,
876 UErrorCode& success) const
877 {
878 return format(source, NULL, cnt, appendTo, &ignore, success);
879 }
880
881 // -------------------------------------
882 // Internally creates a MessageFormat instance based on the
883 // pattern and formats the arguments Formattable array and
884 // copy into the appendTo buffer.
885
886 UnicodeString&
887 MessageFormat::format( const UnicodeString& pattern,
888 const Formattable* arguments,
889 int32_t cnt,
890 UnicodeString& appendTo,
891 UErrorCode& success)
892 {
893 MessageFormat temp(pattern, success);
894 return temp.format(arguments, NULL, cnt, appendTo, NULL, success);
895 }
896
897 // -------------------------------------
898 // Formats the source Formattable object and copy into the
899 // appendTo buffer. The Formattable object must be an array
900 // of Formattable instances, returns error otherwise.
901
902 UnicodeString&
903 MessageFormat::format(const Formattable& source,
904 UnicodeString& appendTo,
905 FieldPosition& ignore,
906 UErrorCode& success) const
907 {
908 if (U_FAILURE(success))
909 return appendTo;
910 if (source.getType() != Formattable::kArray) {
911 success = U_ILLEGAL_ARGUMENT_ERROR;
912 return appendTo;
913 }
914 int32_t cnt;
915 const Formattable* tmpPtr = source.getArray(cnt);
916 return format(tmpPtr, NULL, cnt, appendTo, &ignore, success);
917 }
918
919 UnicodeString&
920 MessageFormat::format(const UnicodeString* argumentNames,
921 const Formattable* arguments,
922 int32_t count,
923 UnicodeString& appendTo,
924 UErrorCode& success) const {
925 return format(arguments, argumentNames, count, appendTo, NULL, success);
926 }
927
928 // Does linear search to find the match for an ArgName.
929 const Formattable* MessageFormat::getArgFromListByName(const Formattable* arguments,
930 const UnicodeString *argumentNames,
931 int32_t cnt, UnicodeString& name) const {
932 for (int32_t i = 0; i < cnt; ++i) {
933 if (0 == argumentNames[i].compare(name)) {
934 return arguments + i;
935 }
936 }
937 return NULL;
938 }
939
940
941 UnicodeString&
942 MessageFormat::format(const Formattable* arguments,
943 const UnicodeString *argumentNames,
944 int32_t cnt,
945 UnicodeString& appendTo,
946 FieldPosition* pos,
947 UErrorCode& status) const {
948 if (U_FAILURE(status)) {
949 return appendTo;
950 }
951
952 UnicodeStringAppendable usapp(appendTo);
953 AppendableWrapper app(usapp);
954 format(0, NULL, arguments, argumentNames, cnt, app, pos, status);
955 return appendTo;
956 }
957
958 namespace {
959
960 /**
961 * Mutable input/output values for the PluralSelectorProvider.
962 * Separate so that it is possible to make MessageFormat Freezable.
963 */
964 class PluralSelectorContext {
965 public:
966 PluralSelectorContext(int32_t start, const UnicodeString &name,
967 const Formattable &num, double off, UErrorCode &errorCode)
968 : startIndex(start), argName(name), offset(off),
969 numberArgIndex(-1), formatter(NULL), forReplaceNumber(FALSE) {
970 // number needs to be set even when select() is not called.
971 // Keep it as a Number/Formattable:
972 // For format() methods, and to preserve information (e.g., BigDecimal).
973 if(off == 0) {
974 number = num;
975 } else {
976 number = num.getDouble(errorCode) - off;
977 }
978 }
979
980 // Input values for plural selection with decimals.
981 int32_t startIndex;
982 const UnicodeString &argName;
983 /** argument number - plural offset */
984 Formattable number;
985 double offset;
986 // Output values for plural selection with decimals.
987 /** -1 if REPLACE_NUMBER, 0 arg not found, >0 ARG_START index */
988 int32_t numberArgIndex;
989 const Format *formatter;
990 /** formatted argument number - plural offset */
991 UnicodeString numberString;
992 /** TRUE if number-offset was formatted with the stock number formatter */
993 UBool forReplaceNumber;
994 };
995
996 } // namespace
997
998 // if argumentNames is NULL, this means arguments is a numeric array.
999 // arguments can not be NULL.
1000 // We use const void *plNumber rather than const PluralSelectorContext *pluralNumber
1001 // so that we need not declare the PluralSelectorContext in the public header file.
1002 void MessageFormat::format(int32_t msgStart, const void *plNumber,
1003 const Formattable* arguments,
1004 const UnicodeString *argumentNames,
1005 int32_t cnt,
1006 AppendableWrapper& appendTo,
1007 FieldPosition* ignore,
1008 UErrorCode& success) const {
1009 if (U_FAILURE(success)) {
1010 return;
1011 }
1012
1013 const UnicodeString& msgString = msgPattern.getPatternString();
1014 int32_t prevIndex = msgPattern.getPart(msgStart).getLimit();
1015 for (int32_t i = msgStart + 1; U_SUCCESS(success) ; ++i) {
1016 const MessagePattern::Part* part = &msgPattern.getPart(i);
1017 const UMessagePatternPartType type = part->getType();
1018 int32_t index = part->getIndex();
1019 appendTo.append(msgString, prevIndex, index - prevIndex);
1020 if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
1021 return;
1022 }
1023 prevIndex = part->getLimit();
1024 if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
1025 const PluralSelectorContext &pluralNumber =
1026 *static_cast<const PluralSelectorContext *>(plNumber);
1027 if(pluralNumber.forReplaceNumber) {
1028 // number-offset was already formatted.
1029 appendTo.formatAndAppend(pluralNumber.formatter,
1030 pluralNumber.number, pluralNumber.numberString, success);
1031 } else {
1032 const NumberFormat* nf = getDefaultNumberFormat(success);
1033 appendTo.formatAndAppend(nf, pluralNumber.number, success);
1034 }
1035 continue;
1036 }
1037 if (type != UMSGPAT_PART_TYPE_ARG_START) {
1038 continue;
1039 }
1040 int32_t argLimit = msgPattern.getLimitPartIndex(i);
1041 UMessagePatternArgType argType = part->getArgType();
1042 part = &msgPattern.getPart(++i);
1043 const Formattable* arg;
1044 UBool noArg = FALSE;
1045 UnicodeString argName = msgPattern.getSubstring(*part);
1046 if (argumentNames == NULL) {
1047 int32_t argNumber = part->getValue(); // ARG_NUMBER
1048 if (0 <= argNumber && argNumber < cnt) {
1049 arg = arguments + argNumber;
1050 } else {
1051 arg = NULL;
1052 noArg = TRUE;
1053 }
1054 } else {
1055 arg = getArgFromListByName(arguments, argumentNames, cnt, argName);
1056 if (arg == NULL) {
1057 noArg = TRUE;
1058 }
1059 }
1060 ++i;
1061 int32_t prevDestLength = appendTo.length();
1062 const Format* formatter = NULL;
1063 if (noArg) {
1064 appendTo.append(
1065 UnicodeString(LEFT_CURLY_BRACE).append(argName).append(RIGHT_CURLY_BRACE));
1066 } else if (arg == NULL) {
1067 appendTo.append(NULL_STRING, 4);
1068 } else if(plNumber!=NULL &&
1069 static_cast<const PluralSelectorContext *>(plNumber)->numberArgIndex==(i-2)) {
1070 const PluralSelectorContext &pluralNumber =
1071 *static_cast<const PluralSelectorContext *>(plNumber);
1072 if(pluralNumber.offset == 0) {
1073 // The number was already formatted with this formatter.
1074 appendTo.formatAndAppend(pluralNumber.formatter, pluralNumber.number,
1075 pluralNumber.numberString, success);
1076 } else {
1077 // Do not use the formatted (number-offset) string for a named argument
1078 // that formats the number without subtracting the offset.
1079 appendTo.formatAndAppend(pluralNumber.formatter, *arg, success);
1080 }
1081 } else if ((formatter = getCachedFormatter(i -2))) {
1082 // Handles all ArgType.SIMPLE, and formatters from setFormat() and its siblings.
1083 if (dynamic_cast<const ChoiceFormat*>(formatter) ||
1084 dynamic_cast<const PluralFormat*>(formatter) ||
1085 dynamic_cast<const SelectFormat*>(formatter)) {
1086 // We only handle nested formats here if they were provided via
1087 // setFormat() or its siblings. Otherwise they are not cached and instead
1088 // handled below according to argType.
1089 UnicodeString subMsgString;
1090 formatter->format(*arg, subMsgString, success);
1091 if (subMsgString.indexOf(LEFT_CURLY_BRACE) >= 0 ||
1092 (subMsgString.indexOf(SINGLE_QUOTE) >= 0 && !MessageImpl::jdkAposMode(msgPattern))
1093 ) {
1094 MessageFormat subMsgFormat(subMsgString, fLocale, success);
1095 subMsgFormat.format(0, NULL, arguments, argumentNames, cnt, appendTo, ignore, success);
1096 } else {
1097 appendTo.append(subMsgString);
1098 }
1099 } else {
1100 appendTo.formatAndAppend(formatter, *arg, success);
1101 }
1102 } else if (argType == UMSGPAT_ARG_TYPE_NONE || (cachedFormatters && uhash_iget(cachedFormatters, i - 2))) {
1103 // We arrive here if getCachedFormatter returned NULL, but there was actually an element in the hash table.
1104 // This can only happen if the hash table contained a DummyFormat, so the if statement above is a check
1105 // for the hash table containind DummyFormat.
1106 if (arg->isNumeric()) {
1107 const NumberFormat* nf = getDefaultNumberFormat(success);
1108 appendTo.formatAndAppend(nf, *arg, success);
1109 } else if (arg->getType() == Formattable::kDate) {
1110 const DateFormat* df = getDefaultDateFormat(success);
1111 appendTo.formatAndAppend(df, *arg, success);
1112 } else {
1113 appendTo.append(arg->getString(success));
1114 }
1115 } else if (argType == UMSGPAT_ARG_TYPE_CHOICE) {
1116 if (!arg->isNumeric()) {
1117 success = U_ILLEGAL_ARGUMENT_ERROR;
1118 return;
1119 }
1120 // We must use the Formattable::getDouble() variant with the UErrorCode parameter
1121 // because only this one converts non-double numeric types to double.
1122 const double number = arg->getDouble(success);
1123 int32_t subMsgStart = ChoiceFormat::findSubMessage(msgPattern, i, number);
1124 formatComplexSubMessage(subMsgStart, NULL, arguments, argumentNames,
1125 cnt, appendTo, success);
1126 } else if (UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE(argType)) {
1127 if (!arg->isNumeric()) {
1128 success = U_ILLEGAL_ARGUMENT_ERROR;
1129 return;
1130 }
1131 const PluralSelectorProvider &selector =
1132 argType == UMSGPAT_ARG_TYPE_PLURAL ? pluralProvider : ordinalProvider;
1133 // We must use the Formattable::getDouble() variant with the UErrorCode parameter
1134 // because only this one converts non-double numeric types to double.
1135 double offset = msgPattern.getPluralOffset(i);
1136 PluralSelectorContext context(i, argName, *arg, offset, success);
1137 int32_t subMsgStart = PluralFormat::findSubMessage(
1138 msgPattern, i, selector, &context, arg->getDouble(success), success);
1139 formatComplexSubMessage(subMsgStart, &context, arguments, argumentNames,
1140 cnt, appendTo, success);
1141 } else if (argType == UMSGPAT_ARG_TYPE_SELECT) {
1142 int32_t subMsgStart = SelectFormat::findSubMessage(msgPattern, i, arg->getString(success), success);
1143 formatComplexSubMessage(subMsgStart, NULL, arguments, argumentNames,
1144 cnt, appendTo, success);
1145 } else {
1146 // This should never happen.
1147 success = U_INTERNAL_PROGRAM_ERROR;
1148 return;
1149 }
1150 ignore = updateMetaData(appendTo, prevDestLength, ignore, arg);
1151 prevIndex = msgPattern.getPart(argLimit).getLimit();
1152 i = argLimit;
1153 }
1154 }
1155
1156
1157 void MessageFormat::formatComplexSubMessage(int32_t msgStart,
1158 const void *plNumber,
1159 const Formattable* arguments,
1160 const UnicodeString *argumentNames,
1161 int32_t cnt,
1162 AppendableWrapper& appendTo,
1163 UErrorCode& success) const {
1164 if (U_FAILURE(success)) {
1165 return;
1166 }
1167
1168 if (!MessageImpl::jdkAposMode(msgPattern)) {
1169 format(msgStart, plNumber, arguments, argumentNames, cnt, appendTo, NULL, success);
1170 return;
1171 }
1172
1173 // JDK compatibility mode: (see JDK MessageFormat.format() API docs)
1174 // - remove SKIP_SYNTAX; that is, remove half of the apostrophes
1175 // - if the result string contains an open curly brace '{' then
1176 // instantiate a temporary MessageFormat object and format again;
1177 // otherwise just append the result string
1178 const UnicodeString& msgString = msgPattern.getPatternString();
1179 UnicodeString sb;
1180 int32_t prevIndex = msgPattern.getPart(msgStart).getLimit();
1181 for (int32_t i = msgStart;;) {
1182 const MessagePattern::Part& part = msgPattern.getPart(++i);
1183 const UMessagePatternPartType type = part.getType();
1184 int32_t index = part.getIndex();
1185 if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
1186 sb.append(msgString, prevIndex, index - prevIndex);
1187 break;
1188 } else if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER || type == UMSGPAT_PART_TYPE_SKIP_SYNTAX) {
1189 sb.append(msgString, prevIndex, index - prevIndex);
1190 if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
1191 const PluralSelectorContext &pluralNumber =
1192 *static_cast<const PluralSelectorContext *>(plNumber);
1193 if(pluralNumber.forReplaceNumber) {
1194 // number-offset was already formatted.
1195 sb.append(pluralNumber.numberString);
1196 } else {
1197 const NumberFormat* nf = getDefaultNumberFormat(success);
1198 sb.append(nf->format(pluralNumber.number, sb, success));
1199 }
1200 }
1201 prevIndex = part.getLimit();
1202 } else if (type == UMSGPAT_PART_TYPE_ARG_START) {
1203 sb.append(msgString, prevIndex, index - prevIndex);
1204 prevIndex = index;
1205 i = msgPattern.getLimitPartIndex(i);
1206 index = msgPattern.getPart(i).getLimit();
1207 MessageImpl::appendReducedApostrophes(msgString, prevIndex, index, sb);
1208 prevIndex = index;
1209 }
1210 }
1211 if (sb.indexOf(LEFT_CURLY_BRACE) >= 0) {
1212 UnicodeString emptyPattern; // gcc 3.3.3 fails with "UnicodeString()" as the first parameter.
1213 MessageFormat subMsgFormat(emptyPattern, fLocale, success);
1214 subMsgFormat.applyPattern(sb, UMSGPAT_APOS_DOUBLE_REQUIRED, NULL, success);
1215 subMsgFormat.format(0, NULL, arguments, argumentNames, cnt, appendTo, NULL, success);
1216 } else {
1217 appendTo.append(sb);
1218 }
1219 }
1220
1221
1222 UnicodeString MessageFormat::getLiteralStringUntilNextArgument(int32_t from) const {
1223 const UnicodeString& msgString=msgPattern.getPatternString();
1224 int32_t prevIndex=msgPattern.getPart(from).getLimit();
1225 UnicodeString b;
1226 for (int32_t i = from + 1; ; ++i) {
1227 const MessagePattern::Part& part = msgPattern.getPart(i);
1228 const UMessagePatternPartType type=part.getType();
1229 int32_t index=part.getIndex();
1230 b.append(msgString, prevIndex, index - prevIndex);
1231 if(type==UMSGPAT_PART_TYPE_ARG_START || type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
1232 return b;
1233 }
1234 // Unexpected Part "part" in parsed message.
1235 U_ASSERT(type==UMSGPAT_PART_TYPE_SKIP_SYNTAX || type==UMSGPAT_PART_TYPE_INSERT_CHAR);
1236 prevIndex=part.getLimit();
1237 }
1238 }
1239
1240
1241 FieldPosition* MessageFormat::updateMetaData(AppendableWrapper& /*dest*/, int32_t /*prevLength*/,
1242 FieldPosition* /*fp*/, const Formattable* /*argId*/) const {
1243 // Unlike in Java, there are no field attributes defined for MessageFormat. Do nothing.
1244 return NULL;
1245 /*
1246 if (fp != NULL && Field.ARGUMENT.equals(fp.getFieldAttribute())) {
1247 fp->setBeginIndex(prevLength);
1248 fp->setEndIndex(dest.get_length());
1249 return NULL;
1250 }
1251 return fp;
1252 */
1253 }
1254
1255 int32_t
1256 MessageFormat::findOtherSubMessage(int32_t partIndex) const {
1257 int32_t count=msgPattern.countParts();
1258 const MessagePattern::Part *part = &msgPattern.getPart(partIndex);
1259 if(MessagePattern::Part::hasNumericValue(part->getType())) {
1260 ++partIndex;
1261 }
1262 // Iterate over (ARG_SELECTOR [ARG_INT|ARG_DOUBLE] message) tuples
1263 // until ARG_LIMIT or end of plural-only pattern.
1264 UnicodeString other(FALSE, OTHER_STRING, 5);
1265 do {
1266 part=&msgPattern.getPart(partIndex++);
1267 UMessagePatternPartType type=part->getType();
1268 if(type==UMSGPAT_PART_TYPE_ARG_LIMIT) {
1269 break;
1270 }
1271 U_ASSERT(type==UMSGPAT_PART_TYPE_ARG_SELECTOR);
1272 // part is an ARG_SELECTOR followed by an optional explicit value, and then a message
1273 if(msgPattern.partSubstringMatches(*part, other)) {
1274 return partIndex;
1275 }
1276 if(MessagePattern::Part::hasNumericValue(msgPattern.getPartType(partIndex))) {
1277 ++partIndex; // skip the numeric-value part of "=1" etc.
1278 }
1279 partIndex=msgPattern.getLimitPartIndex(partIndex);
1280 } while(++partIndex<count);
1281 return 0;
1282 }
1283
1284 int32_t
1285 MessageFormat::findFirstPluralNumberArg(int32_t msgStart, const UnicodeString &argName) const {
1286 for(int32_t i=msgStart+1;; ++i) {
1287 const MessagePattern::Part &part=msgPattern.getPart(i);
1288 UMessagePatternPartType type=part.getType();
1289 if(type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
1290 return 0;
1291 }
1292 if(type==UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
1293 return -1;
1294 }
1295 if(type==UMSGPAT_PART_TYPE_ARG_START) {
1296 UMessagePatternArgType argType=part.getArgType();
1297 if(!argName.isEmpty() && (argType==UMSGPAT_ARG_TYPE_NONE || argType==UMSGPAT_ARG_TYPE_SIMPLE)) {
1298 // ARG_NUMBER or ARG_NAME
1299 if(msgPattern.partSubstringMatches(msgPattern.getPart(i+1), argName)) {
1300 return i;
1301 }
1302 }
1303 i=msgPattern.getLimitPartIndex(i);
1304 }
1305 }
1306 }
1307
1308 void MessageFormat::copyObjects(const MessageFormat& that, UErrorCode& ec) {
1309 // Deep copy pointer fields.
1310 // We need not copy the formatAliases because they are re-filled
1311 // in each getFormats() call.
1312 // The defaultNumberFormat, defaultDateFormat and pluralProvider.rules
1313 // also get created on demand.
1314 argTypeCount = that.argTypeCount;
1315 if (argTypeCount > 0) {
1316 if (!allocateArgTypes(argTypeCount, ec)) {
1317 return;
1318 }
1319 uprv_memcpy(argTypes, that.argTypes, argTypeCount * sizeof(argTypes[0]));
1320 }
1321 if (cachedFormatters != NULL) {
1322 uhash_removeAll(cachedFormatters);
1323 }
1324 if (customFormatArgStarts != NULL) {
1325 uhash_removeAll(customFormatArgStarts);
1326 }
1327 if (that.cachedFormatters) {
1328 if (cachedFormatters == NULL) {
1329 cachedFormatters=uhash_open(uhash_hashLong, uhash_compareLong,
1330 equalFormatsForHash, &ec);
1331 if (U_FAILURE(ec)) {
1332 return;
1333 }
1334 uhash_setValueDeleter(cachedFormatters, uprv_deleteUObject);
1335 }
1336
1337 const int32_t count = uhash_count(that.cachedFormatters);
1338 int32_t pos, idx;
1339 for (idx = 0, pos = -1; idx < count && U_SUCCESS(ec); ++idx) {
1340 const UHashElement* cur = uhash_nextElement(that.cachedFormatters, &pos);
1341 Format* newFormat = ((Format*)(cur->value.pointer))->clone();
1342 if (newFormat) {
1343 uhash_iput(cachedFormatters, cur->key.integer, newFormat, &ec);
1344 } else {
1345 ec = U_MEMORY_ALLOCATION_ERROR;
1346 return;
1347 }
1348 }
1349 }
1350 if (that.customFormatArgStarts) {
1351 if (customFormatArgStarts == NULL) {
1352 customFormatArgStarts=uhash_open(uhash_hashLong, uhash_compareLong,
1353 NULL, &ec);
1354 }
1355 const int32_t count = uhash_count(that.customFormatArgStarts);
1356 int32_t pos, idx;
1357 for (idx = 0, pos = -1; idx < count && U_SUCCESS(ec); ++idx) {
1358 const UHashElement* cur = uhash_nextElement(that.customFormatArgStarts, &pos);
1359 uhash_iputi(customFormatArgStarts, cur->key.integer, cur->value.integer, &ec);
1360 }
1361 }
1362 }
1363
1364
1365 Formattable*
1366 MessageFormat::parse(int32_t msgStart,
1367 const UnicodeString& source,
1368 ParsePosition& pos,
1369 int32_t& count,
1370 UErrorCode& ec) const {
1371 count = 0;
1372 if (U_FAILURE(ec)) {
1373 pos.setErrorIndex(pos.getIndex());
1374 return NULL;
1375 }
1376 // parse() does not work with named arguments.
1377 if (msgPattern.hasNamedArguments()) {
1378 ec = U_ARGUMENT_TYPE_MISMATCH;
1379 pos.setErrorIndex(pos.getIndex());
1380 return NULL;
1381 }
1382 LocalArray<Formattable> resultArray(new Formattable[argTypeCount ? argTypeCount : 1]);
1383 const UnicodeString& msgString=msgPattern.getPatternString();
1384 int32_t prevIndex=msgPattern.getPart(msgStart).getLimit();
1385 int32_t sourceOffset = pos.getIndex();
1386 ParsePosition tempStatus(0);
1387
1388 for(int32_t i=msgStart+1; ; ++i) {
1389 UBool haveArgResult = FALSE;
1390 const MessagePattern::Part* part=&msgPattern.getPart(i);
1391 const UMessagePatternPartType type=part->getType();
1392 int32_t index=part->getIndex();
1393 // Make sure the literal string matches.
1394 int32_t len = index - prevIndex;
1395 if (len == 0 || (0 == msgString.compare(prevIndex, len, source, sourceOffset, len))) {
1396 sourceOffset += len;
1397 prevIndex += len;
1398 } else {
1399 pos.setErrorIndex(sourceOffset);
1400 return NULL; // leave index as is to signal error
1401 }
1402 if(type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
1403 // Things went well! Done.
1404 pos.setIndex(sourceOffset);
1405 return resultArray.orphan();
1406 }
1407 if(type==UMSGPAT_PART_TYPE_SKIP_SYNTAX || type==UMSGPAT_PART_TYPE_INSERT_CHAR) {
1408 prevIndex=part->getLimit();
1409 continue;
1410 }
1411 // We do not support parsing Plural formats. (No REPLACE_NUMBER here.)
1412 // Unexpected Part "part" in parsed message.
1413 U_ASSERT(type==UMSGPAT_PART_TYPE_ARG_START);
1414 int32_t argLimit=msgPattern.getLimitPartIndex(i);
1415
1416 UMessagePatternArgType argType=part->getArgType();
1417 part=&msgPattern.getPart(++i);
1418 int32_t argNumber = part->getValue(); // ARG_NUMBER
1419 UnicodeString key;
1420 ++i;
1421 const Format* formatter = NULL;
1422 Formattable& argResult = resultArray[argNumber];
1423
1424 if(cachedFormatters!=NULL && (formatter = getCachedFormatter(i - 2))!=NULL) {
1425 // Just parse using the formatter.
1426 tempStatus.setIndex(sourceOffset);
1427 formatter->parseObject(source, argResult, tempStatus);
1428 if (tempStatus.getIndex() == sourceOffset) {
1429 pos.setErrorIndex(sourceOffset);
1430 return NULL; // leave index as is to signal error
1431 }
1432 sourceOffset = tempStatus.getIndex();
1433 haveArgResult = TRUE;
1434 } else if(
1435 argType==UMSGPAT_ARG_TYPE_NONE || (cachedFormatters && uhash_iget(cachedFormatters, i -2))) {
1436 // We arrive here if getCachedFormatter returned NULL, but there was actually an element in the hash table.
1437 // This can only happen if the hash table contained a DummyFormat, so the if statement above is a check
1438 // for the hash table containind DummyFormat.
1439
1440 // Match as a string.
1441 // if at end, use longest possible match
1442 // otherwise uses first match to intervening string
1443 // does NOT recursively try all possibilities
1444 UnicodeString stringAfterArgument = getLiteralStringUntilNextArgument(argLimit);
1445 int32_t next;
1446 if (!stringAfterArgument.isEmpty()) {
1447 next = source.indexOf(stringAfterArgument, sourceOffset);
1448 } else {
1449 next = source.length();
1450 }
1451 if (next < 0) {
1452 pos.setErrorIndex(sourceOffset);
1453 return NULL; // leave index as is to signal error
1454 } else {
1455 UnicodeString strValue(source.tempSubString(sourceOffset, next - sourceOffset));
1456 UnicodeString compValue;
1457 compValue.append(LEFT_CURLY_BRACE);
1458 itos(argNumber, compValue);
1459 compValue.append(RIGHT_CURLY_BRACE);
1460 if (0 != strValue.compare(compValue)) {
1461 argResult.setString(strValue);
1462 haveArgResult = TRUE;
1463 }
1464 sourceOffset = next;
1465 }
1466 } else if(argType==UMSGPAT_ARG_TYPE_CHOICE) {
1467 tempStatus.setIndex(sourceOffset);
1468 double choiceResult = ChoiceFormat::parseArgument(msgPattern, i, source, tempStatus);
1469 if (tempStatus.getIndex() == sourceOffset) {
1470 pos.setErrorIndex(sourceOffset);
1471 return NULL; // leave index as is to signal error
1472 }
1473 argResult.setDouble(choiceResult);
1474 haveArgResult = TRUE;
1475 sourceOffset = tempStatus.getIndex();
1476 } else if(UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE(argType) || argType==UMSGPAT_ARG_TYPE_SELECT) {
1477 // Parsing not supported.
1478 ec = U_UNSUPPORTED_ERROR;
1479 return NULL;
1480 } else {
1481 // This should never happen.
1482 ec = U_INTERNAL_PROGRAM_ERROR;
1483 return NULL;
1484 }
1485 if (haveArgResult && count <= argNumber) {
1486 count = argNumber + 1;
1487 }
1488 prevIndex=msgPattern.getPart(argLimit).getLimit();
1489 i=argLimit;
1490 }
1491 }
1492 // -------------------------------------
1493 // Parses the source pattern and returns the Formattable objects array,
1494 // the array count and the ending parse position. The caller of this method
1495 // owns the array.
1496
1497 Formattable*
1498 MessageFormat::parse(const UnicodeString& source,
1499 ParsePosition& pos,
1500 int32_t& count) const {
1501 UErrorCode ec = U_ZERO_ERROR;
1502 return parse(0, source, pos, count, ec);
1503 }
1504
1505 // -------------------------------------
1506 // Parses the source string and returns the array of
1507 // Formattable objects and the array count. The caller
1508 // owns the returned array.
1509
1510 Formattable*
1511 MessageFormat::parse(const UnicodeString& source,
1512 int32_t& cnt,
1513 UErrorCode& success) const
1514 {
1515 if (msgPattern.hasNamedArguments()) {
1516 success = U_ARGUMENT_TYPE_MISMATCH;
1517 return NULL;
1518 }
1519 ParsePosition status(0);
1520 // Calls the actual implementation method and starts
1521 // from zero offset of the source text.
1522 Formattable* result = parse(source, status, cnt);
1523 if (status.getIndex() == 0) {
1524 success = U_MESSAGE_PARSE_ERROR;
1525 delete[] result;
1526 return NULL;
1527 }
1528 return result;
1529 }
1530
1531 // -------------------------------------
1532 // Parses the source text and copy into the result buffer.
1533
1534 void
1535 MessageFormat::parseObject( const UnicodeString& source,
1536 Formattable& result,
1537 ParsePosition& status) const
1538 {
1539 int32_t cnt = 0;
1540 Formattable* tmpResult = parse(source, status, cnt);
1541 if (tmpResult != NULL)
1542 result.adoptArray(tmpResult, cnt);
1543 }
1544
1545 UnicodeString
1546 MessageFormat::autoQuoteApostrophe(const UnicodeString& pattern, UErrorCode& status) {
1547 UnicodeString result;
1548 if (U_SUCCESS(status)) {
1549 int32_t plen = pattern.length();
1550 const UChar* pat = pattern.getBuffer();
1551 int32_t blen = plen * 2 + 1; // space for null termination, convenience
1552 UChar* buf = result.getBuffer(blen);
1553 if (buf == NULL) {
1554 status = U_MEMORY_ALLOCATION_ERROR;
1555 } else {
1556 int32_t len = umsg_autoQuoteApostrophe(pat, plen, buf, blen, &status);
1557 result.releaseBuffer(U_SUCCESS(status) ? len : 0);
1558 }
1559 }
1560 if (U_FAILURE(status)) {
1561 result.setToBogus();
1562 }
1563 return result;
1564 }
1565
1566 // -------------------------------------
1567
1568 static Format* makeRBNF(URBNFRuleSetTag tag, const Locale& locale, const UnicodeString& defaultRuleSet, UErrorCode& ec) {
1569 RuleBasedNumberFormat* fmt = new RuleBasedNumberFormat(tag, locale, ec);
1570 if (fmt == NULL) {
1571 ec = U_MEMORY_ALLOCATION_ERROR;
1572 } else if (U_SUCCESS(ec) && defaultRuleSet.length() > 0) {
1573 UErrorCode localStatus = U_ZERO_ERROR; // ignore unrecognized default rule set
1574 fmt->setDefaultRuleSet(defaultRuleSet, localStatus);
1575 }
1576 return fmt;
1577 }
1578
1579 void MessageFormat::cacheExplicitFormats(UErrorCode& status) {
1580 if (U_FAILURE(status)) {
1581 return;
1582 }
1583
1584 if (cachedFormatters != NULL) {
1585 uhash_removeAll(cachedFormatters);
1586 }
1587 if (customFormatArgStarts != NULL) {
1588 uhash_removeAll(customFormatArgStarts);
1589 }
1590
1591 // The last two "parts" can at most be ARG_LIMIT and MSG_LIMIT
1592 // which we need not examine.
1593 int32_t limit = msgPattern.countParts() - 2;
1594 argTypeCount = 0;
1595 // We also need not look at the first two "parts"
1596 // (at most MSG_START and ARG_START) in this loop.
1597 // We determine the argTypeCount first so that we can allocateArgTypes
1598 // so that the next loop can set argTypes[argNumber].
1599 // (This is for the C API which needs the argTypes to read its va_arg list.)
1600 for (int32_t i = 2; i < limit && U_SUCCESS(status); ++i) {
1601 const MessagePattern::Part& part = msgPattern.getPart(i);
1602 if (part.getType() == UMSGPAT_PART_TYPE_ARG_NUMBER) {
1603 const int argNumber = part.getValue();
1604 if (argNumber >= argTypeCount) {
1605 argTypeCount = argNumber + 1;
1606 }
1607 }
1608 }
1609 if (!allocateArgTypes(argTypeCount, status)) {
1610 return;
1611 }
1612 // Set all argTypes to kObject, as a "none" value, for lack of any better value.
1613 // We never use kObject for real arguments.
1614 // We use it as "no argument yet" for the check for hasArgTypeConflicts.
1615 for (int32_t i = 0; i < argTypeCount; ++i) {
1616 argTypes[i] = Formattable::kObject;
1617 }
1618 hasArgTypeConflicts = FALSE;
1619
1620 // This loop starts at part index 1 because we do need to examine
1621 // ARG_START parts. (But we can ignore the MSG_START.)
1622 for (int32_t i = 1; i < limit && U_SUCCESS(status); ++i) {
1623 const MessagePattern::Part* part = &msgPattern.getPart(i);
1624 if (part->getType() != UMSGPAT_PART_TYPE_ARG_START) {
1625 continue;
1626 }
1627 UMessagePatternArgType argType = part->getArgType();
1628
1629 int32_t argNumber = -1;
1630 part = &msgPattern.getPart(i + 1);
1631 if (part->getType() == UMSGPAT_PART_TYPE_ARG_NUMBER) {
1632 argNumber = part->getValue();
1633 }
1634 Formattable::Type formattableType;
1635
1636 switch (argType) {
1637 case UMSGPAT_ARG_TYPE_NONE:
1638 formattableType = Formattable::kString;
1639 break;
1640 case UMSGPAT_ARG_TYPE_SIMPLE: {
1641 int32_t index = i;
1642 i += 2;
1643 UnicodeString explicitType = msgPattern.getSubstring(msgPattern.getPart(i++));
1644 UnicodeString style;
1645 if ((part = &msgPattern.getPart(i))->getType() == UMSGPAT_PART_TYPE_ARG_STYLE) {
1646 style = msgPattern.getSubstring(*part);
1647 ++i;
1648 }
1649 UParseError parseError;
1650 Format* formatter = createAppropriateFormat(explicitType, style, formattableType, parseError, status);
1651 setArgStartFormat(index, formatter, status);
1652 break;
1653 }
1654 case UMSGPAT_ARG_TYPE_CHOICE:
1655 case UMSGPAT_ARG_TYPE_PLURAL:
1656 case UMSGPAT_ARG_TYPE_SELECTORDINAL:
1657 formattableType = Formattable::kDouble;
1658 break;
1659 case UMSGPAT_ARG_TYPE_SELECT:
1660 formattableType = Formattable::kString;
1661 break;
1662 default:
1663 status = U_INTERNAL_PROGRAM_ERROR; // Should be unreachable.
1664 formattableType = Formattable::kString;
1665 break;
1666 }
1667 if (argNumber != -1) {
1668 if (argTypes[argNumber] != Formattable::kObject && argTypes[argNumber] != formattableType) {
1669 hasArgTypeConflicts = TRUE;
1670 }
1671 argTypes[argNumber] = formattableType;
1672 }
1673 }
1674 }
1675
1676
1677 Format* MessageFormat::createAppropriateFormat(UnicodeString& type, UnicodeString& style,
1678 Formattable::Type& formattableType, UParseError& parseError,
1679 UErrorCode& ec) {
1680 if (U_FAILURE(ec)) {
1681 return NULL;
1682 }
1683 Format* fmt = NULL;
1684 int32_t typeID, styleID;
1685 DateFormat::EStyle date_style;
1686
1687 switch (typeID = findKeyword(type, TYPE_IDS)) {
1688 case 0: // number
1689 formattableType = Formattable::kDouble;
1690 switch (findKeyword(style, NUMBER_STYLE_IDS)) {
1691 case 0: // default
1692 fmt = NumberFormat::createInstance(fLocale, ec);
1693 break;
1694 case 1: // currency
1695 fmt = NumberFormat::createCurrencyInstance(fLocale, ec);
1696 break;
1697 case 2: // percent
1698 fmt = NumberFormat::createPercentInstance(fLocale, ec);
1699 break;
1700 case 3: // integer
1701 formattableType = Formattable::kLong;
1702 fmt = createIntegerFormat(fLocale, ec);
1703 break;
1704 default: // pattern
1705 fmt = NumberFormat::createInstance(fLocale, ec);
1706 if (fmt) {
1707 DecimalFormat* decfmt = dynamic_cast<DecimalFormat*>(fmt);
1708 if (decfmt != NULL) {
1709 decfmt->applyPattern(style,parseError,ec);
1710 }
1711 }
1712 break;
1713 }
1714 break;
1715
1716 case 1: // date
1717 case 2: // time
1718 formattableType = Formattable::kDate;
1719 styleID = findKeyword(style, DATE_STYLE_IDS);
1720 date_style = (styleID >= 0) ? DATE_STYLES[styleID] : DateFormat::kDefault;
1721
1722 if (typeID == 1) {
1723 fmt = DateFormat::createDateInstance(date_style, fLocale);
1724 } else {
1725 fmt = DateFormat::createTimeInstance(date_style, fLocale);
1726 }
1727
1728 if (styleID < 0 && fmt != NULL) {
1729 SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fmt);
1730 if (sdtfmt != NULL) {
1731 sdtfmt->applyPattern(style);
1732 }
1733 }
1734 break;
1735
1736 case 3: // spellout
1737 formattableType = Formattable::kDouble;
1738 fmt = makeRBNF(URBNF_SPELLOUT, fLocale, style, ec);
1739 break;
1740 case 4: // ordinal
1741 formattableType = Formattable::kDouble;
1742 fmt = makeRBNF(URBNF_ORDINAL, fLocale, style, ec);
1743 break;
1744 case 5: // duration
1745 formattableType = Formattable::kDouble;
1746 fmt = makeRBNF(URBNF_DURATION, fLocale, style, ec);
1747 break;
1748 default:
1749 formattableType = Formattable::kString;
1750 ec = U_ILLEGAL_ARGUMENT_ERROR;
1751 break;
1752 }
1753
1754 return fmt;
1755 }
1756
1757
1758 //-------------------------------------
1759 // Finds the string, s, in the string array, list.
1760 int32_t MessageFormat::findKeyword(const UnicodeString& s,
1761 const UChar * const *list)
1762 {
1763 if (s.isEmpty()) {
1764 return 0; // default
1765 }
1766
1767 int32_t length = s.length();
1768 const UChar *ps = PatternProps::trimWhiteSpace(s.getBuffer(), length);
1769 UnicodeString buffer(FALSE, ps, length);
1770 // Trims the space characters and turns all characters
1771 // in s to lower case.
1772 buffer.toLower("");
1773 for (int32_t i = 0; list[i]; ++i) {
1774 if (!buffer.compare(list[i], u_strlen(list[i]))) {
1775 return i;
1776 }
1777 }
1778 return -1;
1779 }
1780
1781 /**
1782 * Convenience method that ought to be in NumberFormat
1783 */
1784 NumberFormat*
1785 MessageFormat::createIntegerFormat(const Locale& locale, UErrorCode& status) const {
1786 NumberFormat *temp = NumberFormat::createInstance(locale, status);
1787 DecimalFormat *temp2;
1788 if (temp != NULL && (temp2 = dynamic_cast<DecimalFormat*>(temp)) != NULL) {
1789 temp2->setMaximumFractionDigits(0);
1790 temp2->setDecimalSeparatorAlwaysShown(FALSE);
1791 temp2->setParseIntegerOnly(TRUE);
1792 }
1793
1794 return temp;
1795 }
1796
1797 /**
1798 * Return the default number format. Used to format a numeric
1799 * argument when subformats[i].format is NULL. Returns NULL
1800 * on failure.
1801 *
1802 * Semantically const but may modify *this.
1803 */
1804 const NumberFormat* MessageFormat::getDefaultNumberFormat(UErrorCode& ec) const {
1805 if (defaultNumberFormat == NULL) {
1806 MessageFormat* t = (MessageFormat*) this;
1807 t->defaultNumberFormat = NumberFormat::createInstance(fLocale, ec);
1808 if (U_FAILURE(ec)) {
1809 delete t->defaultNumberFormat;
1810 t->defaultNumberFormat = NULL;
1811 } else if (t->defaultNumberFormat == NULL) {
1812 ec = U_MEMORY_ALLOCATION_ERROR;
1813 }
1814 }
1815 return defaultNumberFormat;
1816 }
1817
1818 /**
1819 * Return the default date format. Used to format a date
1820 * argument when subformats[i].format is NULL. Returns NULL
1821 * on failure.
1822 *
1823 * Semantically const but may modify *this.
1824 */
1825 const DateFormat* MessageFormat::getDefaultDateFormat(UErrorCode& ec) const {
1826 if (defaultDateFormat == NULL) {
1827 MessageFormat* t = (MessageFormat*) this;
1828 t->defaultDateFormat = DateFormat::createDateTimeInstance(DateFormat::kShort, DateFormat::kShort, fLocale);
1829 if (t->defaultDateFormat == NULL) {
1830 ec = U_MEMORY_ALLOCATION_ERROR;
1831 }
1832 }
1833 return defaultDateFormat;
1834 }
1835
1836 UBool
1837 MessageFormat::usesNamedArguments() const {
1838 return msgPattern.hasNamedArguments();
1839 }
1840
1841 int32_t
1842 MessageFormat::getArgTypeCount() const {
1843 return argTypeCount;
1844 }
1845
1846 UBool MessageFormat::equalFormats(const void* left, const void* right) {
1847 return *(const Format*)left==*(const Format*)right;
1848 }
1849
1850
1851 UBool MessageFormat::DummyFormat::operator==(const Format&) const {
1852 return TRUE;
1853 }
1854
1855 Format* MessageFormat::DummyFormat::clone() const {
1856 return new DummyFormat();
1857 }
1858
1859 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
1860 UnicodeString& appendTo,
1861 UErrorCode& status) const {
1862 if (U_SUCCESS(status)) {
1863 status = U_UNSUPPORTED_ERROR;
1864 }
1865 return appendTo;
1866 }
1867
1868 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
1869 UnicodeString& appendTo,
1870 FieldPosition&,
1871 UErrorCode& status) const {
1872 if (U_SUCCESS(status)) {
1873 status = U_UNSUPPORTED_ERROR;
1874 }
1875 return appendTo;
1876 }
1877
1878 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
1879 UnicodeString& appendTo,
1880 FieldPositionIterator*,
1881 UErrorCode& status) const {
1882 if (U_SUCCESS(status)) {
1883 status = U_UNSUPPORTED_ERROR;
1884 }
1885 return appendTo;
1886 }
1887
1888 void MessageFormat::DummyFormat::parseObject(const UnicodeString&,
1889 Formattable&,
1890 ParsePosition& ) const {
1891 }
1892
1893
1894 FormatNameEnumeration::FormatNameEnumeration(UVector *fNameList, UErrorCode& /*status*/) {
1895 pos=0;
1896 fFormatNames = fNameList;
1897 }
1898
1899 const UnicodeString*
1900 FormatNameEnumeration::snext(UErrorCode& status) {
1901 if (U_SUCCESS(status) && pos < fFormatNames->size()) {
1902 return (const UnicodeString*)fFormatNames->elementAt(pos++);
1903 }
1904 return NULL;
1905 }
1906
1907 void
1908 FormatNameEnumeration::reset(UErrorCode& /*status*/) {
1909 pos=0;
1910 }
1911
1912 int32_t
1913 FormatNameEnumeration::count(UErrorCode& /*status*/) const {
1914 return (fFormatNames==NULL) ? 0 : fFormatNames->size();
1915 }
1916
1917 FormatNameEnumeration::~FormatNameEnumeration() {
1918 delete fFormatNames;
1919 }
1920
1921 MessageFormat::PluralSelectorProvider::PluralSelectorProvider(const MessageFormat &mf, UPluralType t)
1922 : msgFormat(mf), rules(NULL), type(t) {
1923 }
1924
1925 MessageFormat::PluralSelectorProvider::~PluralSelectorProvider() {
1926 delete rules;
1927 }
1928
1929 UnicodeString MessageFormat::PluralSelectorProvider::select(void *ctx, double number,
1930 UErrorCode& ec) const {
1931 if (U_FAILURE(ec)) {
1932 return UnicodeString(FALSE, OTHER_STRING, 5);
1933 }
1934 MessageFormat::PluralSelectorProvider* t = const_cast<MessageFormat::PluralSelectorProvider*>(this);
1935 if(rules == NULL) {
1936 t->rules = PluralRules::forLocale(msgFormat.fLocale, type, ec);
1937 if (U_FAILURE(ec)) {
1938 return UnicodeString(FALSE, OTHER_STRING, 5);
1939 }
1940 }
1941 // Select a sub-message according to how the number is formatted,
1942 // which is specified in the selected sub-message.
1943 // We avoid this circle by looking at how
1944 // the number is formatted in the "other" sub-message
1945 // which must always be present and usually contains the number.
1946 // Message authors should be consistent across sub-messages.
1947 PluralSelectorContext &context = *static_cast<PluralSelectorContext *>(ctx);
1948 int32_t otherIndex = msgFormat.findOtherSubMessage(context.startIndex);
1949 context.numberArgIndex = msgFormat.findFirstPluralNumberArg(otherIndex, context.argName);
1950 if(context.numberArgIndex > 0 && msgFormat.cachedFormatters != NULL) {
1951 context.formatter =
1952 (const Format*)uhash_iget(msgFormat.cachedFormatters, context.numberArgIndex);
1953 }
1954 if(context.formatter == NULL) {
1955 context.formatter = msgFormat.getDefaultNumberFormat(ec);
1956 context.forReplaceNumber = TRUE;
1957 }
1958 U_ASSERT(context.number.getDouble(ec) == number); // argument number minus the offset
1959 context.formatter->format(context.number, context.numberString, ec);
1960 const DecimalFormat *decFmt = dynamic_cast<const DecimalFormat *>(context.formatter);
1961 if(decFmt != NULL) {
1962 FixedDecimal dec = decFmt->getFixedDecimal(context.number, ec);
1963 return rules->select(dec);
1964 } else {
1965 return rules->select(number);
1966 }
1967 }
1968
1969 void MessageFormat::PluralSelectorProvider::reset() {
1970 delete rules;
1971 rules = NULL;
1972 }
1973
1974
1975 U_NAMESPACE_END
1976
1977 #endif /* #if !UCONFIG_NO_FORMATTING */
1978
1979 //eof

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