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scuffed-code/icu4c/source/i18n/plurfmt.cpp
Andy Heninger 242e02c388 ICU-12764 icu4c utf-8 source files, update Copyright notices. 
X-SVN-Rev: 39583
2017-01-20 00:20:31 +00:00

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2009-2015, 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 "nfrule.h"
#include "plurrule_impl.h"
#include "uassert.h"
#include "uhash.h"
#include "precision.h"
#include "visibledigits.h"
#if !UCONFIG_NO_FORMATTING
U_NAMESPACE_BEGIN
static const UChar OTHER_STRING[] = {
0x6F, 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(FieldPosition::DONT_CARE);
UnicodeString result;
return format(Formattable(number), number, result, fpos, status);
}
UnicodeString
PluralFormat::format(double number, UErrorCode& status) const {
FieldPosition fpos(FieldPosition::DONT_CARE);
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;
FixedPrecision fp;
VisibleDigitsWithExponent dec;
fp.initVisibleDigitsWithExponent(numberMinusOffset, dec, status);
if (U_FAILURE(status)) {
return appendTo;
}
if (offset == 0) {
DecimalFormat *decFmt = dynamic_cast<DecimalFormat *>(numberFormat);
if(decFmt != NULL) {
decFmt->initVisibleDigitsWithExponent(
numberObject, dec, status);
if (U_FAILURE(status)) {
return appendTo;
}
decFmt->format(dec, numberString, ignorePos, status);
} else {
numberFormat->format(
numberObject, numberString, ignorePos, status); // could be BigDecimal etc.
}
} else {
DecimalFormat *decFmt = dynamic_cast<DecimalFormat *>(numberFormat);
if(decFmt != NULL) {
decFmt->initVisibleDigitsWithExponent(
numberMinusOffset, dec, status);
if (U_FAILURE(status)) {
return appendTo;
}
decFmt->format(dec, numberString, ignorePos, status);
} else {
numberFormat->format(
numberMinusOffset, numberString, ignorePos, 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;
}
void PluralFormat::parseType(const UnicodeString& source, const NFRule *rbnfLenientScanner, Formattable& result, FieldPosition& pos) const {
// If no pattern was applied, return null.
if (msgPattern.countParts() == 0) {
pos.setBeginIndex(-1);
pos.setEndIndex(-1);
return;
}
int partIndex = 0;
int currMatchIndex;
int count=msgPattern.countParts();
int startingAt = pos.getBeginIndex();
if (startingAt < 0) {
startingAt = 0;
}
// The keyword is null 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 matchedWord;
const UnicodeString& pattern = msgPattern.getPatternString();
int matchedIndex = -1;
// Iterate over (ARG_SELECTOR ARG_START message ARG_LIMIT) tuples
// until the end of the plural-only pattern.
while (partIndex < count) {
const MessagePattern::Part* partSelector = &msgPattern.getPart(partIndex++);
if (partSelector->getType() != UMSGPAT_PART_TYPE_ARG_SELECTOR) {
// Bad format
continue;
}
const MessagePattern::Part* partStart = &msgPattern.getPart(partIndex++);
if (partStart->getType() != UMSGPAT_PART_TYPE_MSG_START) {
// Bad format
continue;
}
const MessagePattern::Part* partLimit = &msgPattern.getPart(partIndex++);
if (partLimit->getType() != UMSGPAT_PART_TYPE_MSG_LIMIT) {
// Bad format
continue;
}
UnicodeString currArg = pattern.tempSubString(partStart->getLimit(), partLimit->getIndex() - partStart->getLimit());
if (rbnfLenientScanner != NULL) {
// If lenient parsing is turned ON, we've got some time consuming parsing ahead of us.
int32_t length = -1;
currMatchIndex = rbnfLenientScanner->findTextLenient(source, currArg, startingAt, &length);
}
else {
currMatchIndex = source.indexOf(currArg, startingAt);
}
if (currMatchIndex >= 0 && currMatchIndex >= matchedIndex && currArg.length() > matchedWord.length()) {
matchedIndex = currMatchIndex;
matchedWord = currArg;
keyword = pattern.tempSubString(partStart->getLimit(), partLimit->getIndex() - partStart->getLimit());
}
}
if (matchedIndex >= 0) {
pos.setBeginIndex(matchedIndex);
pos.setEndIndex(matchedIndex + matchedWord.length());
result.setString(keyword);
return;
}
// Not found!
pos.setBeginIndex(-1);
pos.setEndIndex(-1);
}
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
VisibleDigitsWithExponent *dec=static_cast<VisibleDigitsWithExponent *>(context);
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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