456 lines
13 KiB
C++
456 lines
13 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 2008, International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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* File PLURFMT.CPP
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*
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* Modification History:
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*
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* Date Name Description
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*******************************************************************************
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*/
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#include "unicode/utypes.h"
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#include "unicode/plurfmt.h"
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#include "unicode/plurrule.h"
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#include "plurrule_impl.h"
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#if !UCONFIG_NO_FORMATTING
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U_CDECL_BEGIN
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static void U_CALLCONV
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deleteHashStrings(void *obj) {
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delete (UnicodeString *)obj;
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(PluralFormat)
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#define MAX_KEYWORD_SIZE 30
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PluralFormat::PluralFormat(UErrorCode& status) {
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init(NULL, Locale::getDefault(), status);
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}
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PluralFormat::PluralFormat(const Locale& locale, UErrorCode& status) {
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init(NULL, locale, status);
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}
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PluralFormat::PluralFormat(const PluralRules& rules, UErrorCode& status) {
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init(&rules, Locale::getDefault(), status);
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}
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PluralFormat::PluralFormat(const Locale& loc, const PluralRules& rules, UErrorCode& status) {
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init(&rules, loc, status);
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}
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PluralFormat::PluralFormat(const UnicodeString& pat, UErrorCode& status) {
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init(NULL, Locale::getDefault(), status);
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applyPattern(pat, status);
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}
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PluralFormat::PluralFormat(const Locale& loc, const UnicodeString& pat, UErrorCode& status) {
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init(NULL, loc, status);
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applyPattern(pat, status);
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}
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PluralFormat::PluralFormat(const PluralRules& rules, const UnicodeString& pat, UErrorCode& status) {
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init(&rules, Locale::getDefault(), status);
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applyPattern(pat, status);
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}
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PluralFormat::PluralFormat(const Locale& loc, const PluralRules& rules, const UnicodeString& pat, UErrorCode& status) {
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init(&rules, loc, status);
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applyPattern(pat, status);
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}
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PluralFormat::PluralFormat(const PluralFormat& other) : Format(other) {
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UErrorCode status = U_ZERO_ERROR;
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locale = other.locale;
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pluralRules = other.pluralRules->clone();
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pattern = other.pattern;
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copyHashtable(other.fParsedValuesHash, status);
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numberFormat=NumberFormat::createInstance(locale, status);
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replacedNumberFormat=other.replacedNumberFormat;
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}
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PluralFormat::~PluralFormat() {
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delete pluralRules;
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delete fParsedValuesHash;
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delete numberFormat;
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}
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void
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PluralFormat::init(const PluralRules* rules, const Locale& curLocale, UErrorCode& status) {
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locale = curLocale;
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if ( rules==NULL) {
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pluralRules = PluralRules::forLocale(locale, status);
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}
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else {
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pluralRules = rules->clone();
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}
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fParsedValuesHash=NULL;
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pattern.remove();
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numberFormat= NumberFormat::createInstance(curLocale, status);
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replacedNumberFormat=NULL;
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}
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void
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PluralFormat::applyPattern(const UnicodeString& newPattern, UErrorCode& status) {
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this->pattern = newPattern;
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UnicodeString token;
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int32_t braceCount=0;
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fmtToken type;
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UBool spaceIncluded=FALSE;
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if (fParsedValuesHash==NULL) {
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fParsedValuesHash = new Hashtable(TRUE, status);
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if (U_FAILURE(status)) {
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return;
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}
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fParsedValuesHash->setValueDeleter(deleteHashStrings);
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}
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UBool getKeyword=TRUE;
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UnicodeString hashKeyword;
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UnicodeString *hashPattern;
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for (int32_t i=0; i<pattern.length(); ++i) {
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UChar ch=pattern.charAt(i);
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if ( !inRange(ch, type) ) {
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if (getKeyword) {
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status = U_ILLEGAL_CHARACTER;
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return;
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}
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else {
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token += ch;
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continue;
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}
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}
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switch (type) {
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case tSpace:
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if (token.length()==0) {
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continue;
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}
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if (getKeyword) {
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// space after keyword
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spaceIncluded = TRUE;
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}
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else {
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token += ch;
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}
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break;
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case tLeftBrace:
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if ( getKeyword ) {
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if (fParsedValuesHash->get(token)!= NULL) {
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status = U_DUPLICATE_KEYWORD;
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return;
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}
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if (token.length()==0) {
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status = U_PATTERN_SYNTAX_ERROR;
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return;
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}
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if (!pluralRules->isKeyword(token) &&
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pluralRules->getKeywordOther()!=token) {
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status = U_UNDEFINED_KEYWORD;
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return;
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}
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hashKeyword = token;
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getKeyword = FALSE;
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token.remove();
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}
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else {
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if (braceCount==0) {
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status = U_UNEXPECTED_TOKEN;
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return;
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}
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else {
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token += ch;
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}
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}
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braceCount++;
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spaceIncluded = FALSE;
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break;
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case tRightBrace:
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if ( getKeyword ) {
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status = U_UNEXPECTED_TOKEN;
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return;
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}
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else {
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hashPattern = new UnicodeString(token);
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fParsedValuesHash->put(hashKeyword, hashPattern, status);
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braceCount--;
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if ( braceCount==0 ) {
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getKeyword=TRUE;
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hashKeyword.remove();
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hashPattern=NULL;
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token.remove();
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}
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else {
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token += ch;
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}
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}
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spaceIncluded = FALSE;
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break;
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case tLetter:
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case tNumberSign:
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if (spaceIncluded) {
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status = U_PATTERN_SYNTAX_ERROR;
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return;
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}
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default:
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token+=ch;
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break;
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}
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}
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if ( checkSufficientDefinition() ) {
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return;
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}
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else {
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status = U_DEFAULT_KEYWORD_MISSING;
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return;
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}
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}
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UnicodeString&
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PluralFormat::format(const Formattable& obj,
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UnicodeString& appendTo,
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FieldPosition& pos,
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UErrorCode& status) const
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{
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if (U_FAILURE(status)) return appendTo;
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int32_t number;
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switch (obj.getType())
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{
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case Formattable::kDouble:
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return format((int32_t)obj.getDouble(), appendTo, pos, status);
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break;
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case Formattable::kLong:
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number = (int32_t)obj.getLong();
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return format(number, appendTo, pos, status);
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break;
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case Formattable::kInt64:
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return format((int32_t)obj.getInt64(), appendTo, pos, status);
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default:
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return appendTo;
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}
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}
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UnicodeString
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PluralFormat::format(int32_t number, UErrorCode& status) const {
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FieldPosition fpos(0);
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UnicodeString result;
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return format(number, result, fpos, status);
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}
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UnicodeString&
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PluralFormat::format(int32_t number,
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UnicodeString& appendTo,
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FieldPosition& pos,
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UErrorCode& /*status*/) const {
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if (fParsedValuesHash==NULL) {
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if ( replacedNumberFormat== NULL ) {
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return numberFormat->format(number, appendTo, pos);
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}
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else {
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replacedNumberFormat->format(number, appendTo, pos);
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}
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}
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UnicodeString selectedRule = pluralRules->select(number);
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UnicodeString *selectedPattern = (UnicodeString *)fParsedValuesHash->get(selectedRule);
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if (selectedPattern==NULL) {
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selectedPattern = (UnicodeString *)fParsedValuesHash->get(pluralRules->getKeywordOther());
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}
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appendTo = insertFormattedNumber(number, *selectedPattern, appendTo, pos);
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return appendTo;
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}
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UnicodeString&
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PluralFormat::toPattern(UnicodeString& appendTo) {
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appendTo+= pattern;
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return appendTo;
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}
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UBool
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PluralFormat::inRange(UChar ch, fmtToken& type) {
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if ((ch>=CAP_A) && (ch<=CAP_Z)) {
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// we assume all characters are in lower case already.
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return FALSE;
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}
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if ((ch>=LOW_A) && (ch<=LOW_Z)) {
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type = tLetter;
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return TRUE;
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}
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switch (ch) {
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case LEFTBRACE:
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type = tLeftBrace;
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return TRUE;
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case SPACE:
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type = tSpace;
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return TRUE;
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case RIGHTBRACE:
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type = tRightBrace;
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return TRUE;
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case NUMBER_SIGN:
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type = tNumberSign;
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return TRUE;
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default :
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type = none;
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return FALSE;
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}
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}
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UBool
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PluralFormat::checkSufficientDefinition() {
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// Check that at least the default rule is defined.
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if (fParsedValuesHash==NULL) return FALSE;
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if (fParsedValuesHash->get(pluralRules->getKeywordOther()) == NULL) {
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return FALSE;
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}
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else {
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return TRUE;
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}
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}
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void
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PluralFormat::setLocale(const Locale& loc, UErrorCode& status) {
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if (pluralRules!=NULL) {
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delete pluralRules;
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pluralRules=NULL;
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}
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if (fParsedValuesHash!= NULL) {
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delete fParsedValuesHash;
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fParsedValuesHash = NULL;
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}
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if (numberFormat!=NULL) {
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delete numberFormat;
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numberFormat = NULL;
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replacedNumberFormat=NULL;
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}
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init(NULL, loc, status);
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}
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void
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PluralFormat::setNumberFormat(const NumberFormat* format, UErrorCode& /*status*/) {
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// TODO: The copy constructor and assignment op of NumberFormat class are protected.
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// create a pointer as the workaround.
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replacedNumberFormat = (NumberFormat *)format;
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}
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Format*
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PluralFormat::clone() const
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{
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return new PluralFormat(*this);
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}
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/*
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Format*
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PluralFormat::clone() const {
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}
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*/
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UBool
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PluralFormat::operator==(const Format& other) const {
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// This protected comparison operator should only be called by subclasses
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// which have confirmed that the other object being compared against is
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// an instance of a sublcass of PluralFormat. THIS IS IMPORTANT.
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// Format::operator== guarantees that this cast is safe
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PluralFormat* fmt = (PluralFormat*)&other;
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return ((*pluralRules == *(fmt->pluralRules)) &&
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(*numberFormat == *(fmt->numberFormat)));
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}
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UBool
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PluralFormat::operator!=(const Format& other) const {
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return !operator==(other);
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}
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void
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PluralFormat::parseObject(const UnicodeString& /*source*/,
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Formattable& /*result*/,
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ParsePosition& /*pos*/) const
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{
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// TODO: not yet supported in icu4j and icu4c
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}
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UnicodeString
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PluralFormat::insertFormattedNumber(int32_t number,
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UnicodeString& message,
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UnicodeString& appendTo,
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FieldPosition& pos) const {
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UnicodeString result;
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int32_t braceStack=0;
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int32_t startIndex=0;
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if (message.length()==0) {
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return result;
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}
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appendTo = numberFormat->format(number, appendTo, pos);
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for(int32_t i=0; i<message.length(); ++i) {
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switch(message.charAt(i)) {
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case LEFTBRACE:
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++braceStack;
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break;
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case RIGHTBRACE:
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--braceStack;
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break;
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case NUMBER_SIGN:
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if (braceStack==0) {
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result += UnicodeString(message, startIndex, i);
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result += appendTo;
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startIndex = i + 1;
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}
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break;
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}
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}
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if ( startIndex < message.length() ) {
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result += UnicodeString(message, startIndex, message.length()-startIndex);
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}
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appendTo = result;
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return result;
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}
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void
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PluralFormat::copyHashtable(Hashtable *other, UErrorCode& status) {
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if (other == NULL) {
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fParsedValuesHash = NULL;
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return;
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}
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fParsedValuesHash = new Hashtable(TRUE, status);
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if(U_FAILURE(status)){
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return;
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}
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fParsedValuesHash->setValueDeleter(deleteHashStrings);
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int32_t pos = -1;
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const UHashElement* elem = NULL;
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// walk through the hash table and create a deep clone
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while((elem = other->nextElement(pos))!= NULL){
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const UHashTok otherKeyTok = elem->key;
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UnicodeString* otherKey = (UnicodeString*)otherKeyTok.pointer;
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const UHashTok otherKeyToVal = elem->value;
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UnicodeString* otherValue = (UnicodeString*)otherKeyToVal.pointer;
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fParsedValuesHash->put(*otherKey, new UnicodeString(*otherValue), status);
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if(U_FAILURE(status)){
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return;
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}
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}
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}
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_FORMATTING */
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//eof
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