The Tor Browser: intl/icu/source/i18n/plurfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/plurfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/plurfmt.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 *******************************************************************************
 * Copyright (C) 2009-2013, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 *
 * File PLURFMT.CPP
 *******************************************************************************
 */
 #include "unicode/decimfmt.h"
 #include "unicode/messagepattern.h"
 #include "unicode/plurfmt.h"
 #include "unicode/plurrule.h"
 #include "unicode/utypes.h"
 #include "cmemory.h"
 #include "messageimpl.h"
 #include "plurrule_impl.h"
 #include "uassert.h"
 #include "uhash.h"
 #if !UCONFIG_NO_FORMATTING
 U_NAMESPACE_BEGIN
 static const UChar OTHER_STRING[] = {
 x6F, 0x74, 0x68, 0x65, 0x72, 0  // "other"
 };
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PluralFormat)
 PluralFormat::PluralFormat(UErrorCode& status)
         : locale(Locale::getDefault()),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, UPLURAL_TYPE_CARDINAL, status);
 }
 PluralFormat::PluralFormat(const Locale& loc, UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, UPLURAL_TYPE_CARDINAL, status);
 }
 PluralFormat::PluralFormat(const PluralRules& rules, UErrorCode& status)
         : locale(Locale::getDefault()),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(&rules, UPLURAL_TYPE_COUNT, status);
 }
 PluralFormat::PluralFormat(const Locale& loc,
                            const PluralRules& rules,
                            UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(&rules, UPLURAL_TYPE_COUNT, status);
 }
 PluralFormat::PluralFormat(const Locale& loc,
                            UPluralType type,
                            UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, type, status);
 }
 PluralFormat::PluralFormat(const UnicodeString& pat,
                            UErrorCode& status)
         : locale(Locale::getDefault()),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, UPLURAL_TYPE_CARDINAL, status);
     applyPattern(pat, status);
 }
 PluralFormat::PluralFormat(const Locale& loc,
                            const UnicodeString& pat,
                            UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, UPLURAL_TYPE_CARDINAL, status);
     applyPattern(pat, status);
 }
 PluralFormat::PluralFormat(const PluralRules& rules,
                            const UnicodeString& pat,
                            UErrorCode& status)
         : locale(Locale::getDefault()),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(&rules, UPLURAL_TYPE_COUNT, status);
     applyPattern(pat, status);
 }
 PluralFormat::PluralFormat(const Locale& loc,
                            const PluralRules& rules,
                            const UnicodeString& pat,
                            UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(&rules, UPLURAL_TYPE_COUNT, status);
     applyPattern(pat, status);
 }
 PluralFormat::PluralFormat(const Locale& loc,
                            UPluralType type,
                            const UnicodeString& pat,
                            UErrorCode& status)
         : locale(loc),
           msgPattern(status),
           numberFormat(NULL),
           offset(0) {
     init(NULL, type, status);
     applyPattern(pat, status);
 }
 PluralFormat::PluralFormat(const PluralFormat& other)
         : Format(other),
           locale(other.locale),
           msgPattern(other.msgPattern),
           numberFormat(NULL),
           offset(other.offset) {
     copyObjects(other);
 }
 void
 PluralFormat::copyObjects(const PluralFormat& other) {
     UErrorCode status = U_ZERO_ERROR;
     if (numberFormat != NULL) {
         delete numberFormat;
     }
     if (pluralRulesWrapper.pluralRules != NULL) {
         delete pluralRulesWrapper.pluralRules;
     }
     if (other.numberFormat == NULL) {
         numberFormat = NumberFormat::createInstance(locale, status);
     } else {
         numberFormat = (NumberFormat*)other.numberFormat->clone();
     }
     if (other.pluralRulesWrapper.pluralRules == NULL) {
         pluralRulesWrapper.pluralRules = PluralRules::forLocale(locale, status);
     } else {
         pluralRulesWrapper.pluralRules = other.pluralRulesWrapper.pluralRules->clone();
     }
 }
 PluralFormat::~PluralFormat() {
     delete numberFormat;
 }
 void
 PluralFormat::init(const PluralRules* rules, UPluralType type, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return;
     }
     if (rules==NULL) {
         pluralRulesWrapper.pluralRules = PluralRules::forLocale(locale, type, status);
     } else {
         pluralRulesWrapper.pluralRules = rules->clone();
         if (pluralRulesWrapper.pluralRules == NULL) {
             status = U_MEMORY_ALLOCATION_ERROR;
             return;
         }
     }
     numberFormat= NumberFormat::createInstance(locale, status);
 }
 void
 PluralFormat::applyPattern(const UnicodeString& newPattern, UErrorCode& status) {
     msgPattern.parsePluralStyle(newPattern, NULL, status);
     if (U_FAILURE(status)) {
         msgPattern.clear();
         offset = 0;
         return;
     }
     offset = msgPattern.getPluralOffset(0);
 }
 UnicodeString&
 PluralFormat::format(const Formattable& obj,
                    UnicodeString& appendTo,
                    FieldPosition& pos,
                    UErrorCode& status) const
 {
     if (U_FAILURE(status)) return appendTo;
     if (obj.isNumeric()) {
         return format(obj, obj.getDouble(), appendTo, pos, status);
     } else {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return appendTo;
     }
 }
 UnicodeString
 PluralFormat::format(int32_t number, UErrorCode& status) const {
     FieldPosition fpos(0);
     UnicodeString result;
     return format(Formattable(number), number, result, fpos, status);
 }
 UnicodeString
 PluralFormat::format(double number, UErrorCode& status) const {
     FieldPosition fpos(0);
     UnicodeString result;
     return format(Formattable(number), number, result, fpos, status);
 }
 UnicodeString&
 PluralFormat::format(int32_t number,
                      UnicodeString& appendTo,
                      FieldPosition& pos,
                      UErrorCode& status) const {
     return format(Formattable(number), (double)number, appendTo, pos, status);
 }
 UnicodeString&
 PluralFormat::format(double number,
                      UnicodeString& appendTo,
                      FieldPosition& pos,
                      UErrorCode& status) const {
     return format(Formattable(number), (double)number, appendTo, pos, status);
 }
 UnicodeString&
 PluralFormat::format(const Formattable& numberObject, double number,
                      UnicodeString& appendTo,
                      FieldPosition& pos,
                      UErrorCode& status) const {
     if (U_FAILURE(status)) {
         return appendTo;
     }
     if (msgPattern.countParts() == 0) {
         return numberFormat->format(numberObject, appendTo, pos, status);
     }
     // Get the appropriate sub-message.
     // Select it based on the formatted number-offset.
     double numberMinusOffset = number - offset;
     UnicodeString numberString;
     FieldPosition ignorePos;
     FixedDecimal dec(numberMinusOffset);
     if (offset == 0) {
         numberFormat->format(numberObject, numberString, ignorePos, status);  // could be BigDecimal etc.
         DecimalFormat *decFmt = dynamic_cast<DecimalFormat *>(numberFormat);
         if(decFmt != NULL) {
             dec = decFmt->getFixedDecimal(numberObject, status);
         }
     } else {
         numberFormat->format(numberMinusOffset, numberString, ignorePos, status);
         DecimalFormat *decFmt = dynamic_cast<DecimalFormat *>(numberFormat);
         if(decFmt != NULL) {
             dec = decFmt->getFixedDecimal(numberMinusOffset, status);
         }
     }
     int32_t partIndex = findSubMessage(msgPattern, 0, pluralRulesWrapper, &dec, number, status);
     if (U_FAILURE(status)) { return appendTo; }
     // Replace syntactic # signs in the top level of this sub-message
     // (not in nested arguments) with the formatted number-offset.
     const UnicodeString& pattern = msgPattern.getPatternString();
     int32_t prevIndex = msgPattern.getPart(partIndex).getLimit();
     for (;;) {
         const MessagePattern::Part& part = msgPattern.getPart(++partIndex);
         const UMessagePatternPartType type = part.getType();
         int32_t index = part.getIndex();
         if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
             return appendTo.append(pattern, prevIndex, index - prevIndex);
         } else if ((type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) ||
             (type == UMSGPAT_PART_TYPE_SKIP_SYNTAX && MessageImpl::jdkAposMode(msgPattern))) {
             appendTo.append(pattern, prevIndex, index - prevIndex);
             if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
                 appendTo.append(numberString);
             }
             prevIndex = part.getLimit();
         } else if (type == UMSGPAT_PART_TYPE_ARG_START) {
             appendTo.append(pattern, prevIndex, index - prevIndex);
             prevIndex = index;
             partIndex = msgPattern.getLimitPartIndex(partIndex);
             index = msgPattern.getPart(partIndex).getLimit();
             MessageImpl::appendReducedApostrophes(pattern, prevIndex, index, appendTo);
             prevIndex = index;
         }
     }
 }
 UnicodeString&
 PluralFormat::toPattern(UnicodeString& appendTo) {
     if (0 == msgPattern.countParts()) {
         appendTo.setToBogus();
     } else {
         appendTo.append(msgPattern.getPatternString());
     }
     return appendTo;
 }
 void
 PluralFormat::setLocale(const Locale& loc, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return;
     }
     locale = loc;
     msgPattern.clear();
     delete numberFormat;
     offset = 0;
     numberFormat = NULL;
     pluralRulesWrapper.reset();
     init(NULL, UPLURAL_TYPE_CARDINAL, status);
 }
 void
 PluralFormat::setNumberFormat(const NumberFormat* format, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return;
     }
     NumberFormat* nf = (NumberFormat*)format->clone();
     if (nf != NULL) {
         delete numberFormat;
         numberFormat = nf;
     } else {
         status = U_MEMORY_ALLOCATION_ERROR;
     }
 }
 Format*
 PluralFormat::clone() const
 {
     return new PluralFormat(*this);
 }
 PluralFormat&
 PluralFormat::operator=(const PluralFormat& other) {
     if (this != &other) {
         locale = other.locale;
         msgPattern = other.msgPattern;
         offset = other.offset;
         copyObjects(other);
     }
     return *this;
 }
 UBool
 PluralFormat::operator==(const Format& other) const {
     if (this == &other) {
         return TRUE;
     }
     if (!Format::operator==(other)) {
         return FALSE;
     }
     const PluralFormat& o = (const PluralFormat&)other;
     return
         locale == o.locale &&
         msgPattern == o.msgPattern &&  // implies same offset
         (numberFormat == NULL) == (o.numberFormat == NULL) &&
         (numberFormat == NULL || *numberFormat == *o.numberFormat) &&
         (pluralRulesWrapper.pluralRules == NULL) == (o.pluralRulesWrapper.pluralRules == NULL) &&
         (pluralRulesWrapper.pluralRules == NULL ||
             *pluralRulesWrapper.pluralRules == *o.pluralRulesWrapper.pluralRules);
 }
 UBool
 PluralFormat::operator!=(const Format& other) const {
     return  !operator==(other);
 }
 void
 PluralFormat::parseObject(const UnicodeString& /*source*/,
                         Formattable& /*result*/,
                         ParsePosition& pos) const
 {
     // Parsing not supported.
     pos.setErrorIndex(pos.getIndex());
 }
 int32_t PluralFormat::findSubMessage(const MessagePattern& pattern, int32_t partIndex,
                                      const PluralSelector& selector, void *context,
                                      double number, UErrorCode& ec) {
     if (U_FAILURE(ec)) {
         return 0;
     }
     int32_t count=pattern.countParts();
     double offset;
     const MessagePattern::Part* part=&pattern.getPart(partIndex);
     if (MessagePattern::Part::hasNumericValue(part->getType())) {
         offset=pattern.getNumericValue(*part);
         ++partIndex;
     } else {
         offset=0;
     }
     // The keyword is empty until we need to match against a non-explicit, not-"other" value.
     // Then we get the keyword from the selector.
     // (In other words, we never call the selector if we match against an explicit value,
     // or if the only non-explicit keyword is "other".)
     UnicodeString keyword;
     UnicodeString other(FALSE, OTHER_STRING, 5);
     // When we find a match, we set msgStart>0 and also set this boolean to true
     // to avoid matching the keyword again (duplicates are allowed)
     // while we continue to look for an explicit-value match.
     UBool haveKeywordMatch=FALSE;
     // msgStart is 0 until we find any appropriate sub-message.
     // We remember the first "other" sub-message if we have not seen any
     // appropriate sub-message before.
     // We remember the first matching-keyword sub-message if we have not seen
     // one of those before.
     // (The parser allows [does not check for] duplicate keywords.
     // We just have to make sure to take the first one.)
     // We avoid matching the keyword twice by also setting haveKeywordMatch=true
     // at the first keyword match.
     // We keep going until we find an explicit-value match or reach the end of the plural style.
     int32_t msgStart=0;
     // Iterate over (ARG_SELECTOR [ARG_INT|ARG_DOUBLE] message) tuples
     // until ARG_LIMIT or end of plural-only pattern.
     do {
         part=&pattern.getPart(partIndex++);
         const UMessagePatternPartType type = part->getType();
         if(type==UMSGPAT_PART_TYPE_ARG_LIMIT) {
             break;
         }
         U_ASSERT (type==UMSGPAT_PART_TYPE_ARG_SELECTOR);
         // part is an ARG_SELECTOR followed by an optional explicit value, and then a message
         if(MessagePattern::Part::hasNumericValue(pattern.getPartType(partIndex))) {
             // explicit value like "=2"
             part=&pattern.getPart(partIndex++);
             if(number==pattern.getNumericValue(*part)) {
                 // matches explicit value
                 return partIndex;
             }
         } else if(!haveKeywordMatch) {
             // plural keyword like "few" or "other"
             // Compare "other" first and call the selector if this is not "other".
             if(pattern.partSubstringMatches(*part, other)) {
                 if(msgStart==0) {
                     msgStart=partIndex;
                     if(0 == keyword.compare(other)) {
                         // This is the first "other" sub-message,
                         // and the selected keyword is also "other".
                         // Do not match "other" again.
                         haveKeywordMatch=TRUE;
                     }
                 }
             } else {
                 if(keyword.isEmpty()) {
                     keyword=selector.select(context, number-offset, ec);
                     if(msgStart!=0 && (0 == keyword.compare(other))) {
                         // We have already seen an "other" sub-message.
                         // Do not match "other" again.
                         haveKeywordMatch=TRUE;
                         // Skip keyword matching but do getLimitPartIndex().
                     }
                 }
                 if(!haveKeywordMatch && pattern.partSubstringMatches(*part, keyword)) {
                     // keyword matches
                     msgStart=partIndex;
                     // Do not match this keyword again.
                     haveKeywordMatch=TRUE;
                 }
             }
         }
         partIndex=pattern.getLimitPartIndex(partIndex);
     } while(++partIndex<count);
     return msgStart;
 }
 PluralFormat::PluralSelector::~PluralSelector() {}
 PluralFormat::PluralSelectorAdapter::~PluralSelectorAdapter() {
     delete pluralRules;
 }
 UnicodeString PluralFormat::PluralSelectorAdapter::select(void *context, double number,
                                                           UErrorCode& /*ec*/) const {
     (void)number;  // unused except in the assertion
     FixedDecimal *dec=static_cast<FixedDecimal *>(context);
     U_ASSERT(dec->source==number);
     return pluralRules->select(*dec);
 }
 void PluralFormat::PluralSelectorAdapter::reset() {
     delete pluralRules;
     pluralRules = NULL;
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_FORMATTING */
 //eof

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intl/icu/source/i18n/plurfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/plurfmt.cpp