354 lines
14 KiB
C++
354 lines
14 KiB
C++
// © 2018 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING && !UPRV_INCOMPLETE_CPP11_SUPPORT
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// Allow implicit conversion from char16_t* to UnicodeString for this file:
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// Helpful in toString methods and elsewhere.
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#define UNISTR_FROM_STRING_EXPLICIT
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#include <typeinfo>
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#include <array>
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#include <iostream>
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#include "number_types.h"
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#include "number_patternstring.h"
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#include "numparse_types.h"
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#include "numparse_impl.h"
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#include "numparse_symbols.h"
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#include "numparse_decimal.h"
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#include "unicode/numberformatter.h"
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#include "cstr.h"
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#include "number_mapper.h"
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#include "numparse_unisets.h"
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using namespace icu;
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using namespace icu::number;
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using namespace icu::number::impl;
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using namespace icu::numparse;
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using namespace icu::numparse::impl;
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NumberParserImpl*
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NumberParserImpl::createSimpleParser(const Locale& locale, const UnicodeString& patternString,
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parse_flags_t parseFlags, UErrorCode& status) {
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LocalPointer<NumberParserImpl> parser(new NumberParserImpl(parseFlags));
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DecimalFormatSymbols symbols(locale, status);
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parser->fLocalMatchers.ignorables = {unisets::DEFAULT_IGNORABLES};
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IgnorablesMatcher& ignorables = parser->fLocalMatchers.ignorables;
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DecimalFormatSymbols dfs(locale, status);
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dfs.setSymbol(DecimalFormatSymbols::kCurrencySymbol, u"IU$", status);
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dfs.setSymbol(DecimalFormatSymbols::kIntlCurrencySymbol, u"ICU", status);
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CurrencySymbols currencySymbols({u"ICU", status}, locale, dfs, status);
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ParsedPatternInfo patternInfo;
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PatternParser::parseToPatternInfo(patternString, patternInfo, status);
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// The following statements set up the affix matchers.
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AffixTokenMatcherSetupData affixSetupData = {
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currencySymbols, symbols, ignorables, locale};
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parser->fLocalMatchers.affixTokenMatcherWarehouse = {&affixSetupData};
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parser->fLocalMatchers.affixMatcherWarehouse = {&parser->fLocalMatchers.affixTokenMatcherWarehouse};
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parser->fLocalMatchers.affixMatcherWarehouse.createAffixMatchers(
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patternInfo, *parser, ignorables, parseFlags, status);
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Grouper grouper = Grouper::forStrategy(UNUM_GROUPING_AUTO);
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grouper.setLocaleData(patternInfo, locale);
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parser->addMatcher(parser->fLocalMatchers.ignorables);
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parser->addMatcher(parser->fLocalMatchers.decimal = {symbols, grouper, parseFlags});
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parser->addMatcher(parser->fLocalMatchers.minusSign = {symbols, false});
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parser->addMatcher(parser->fLocalMatchers.plusSign = {symbols, false});
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parser->addMatcher(parser->fLocalMatchers.percent = {symbols});
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parser->addMatcher(parser->fLocalMatchers.permille = {symbols});
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parser->addMatcher(parser->fLocalMatchers.nan = {symbols});
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parser->addMatcher(parser->fLocalMatchers.infinity = {symbols});
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parser->addMatcher(parser->fLocalMatchers.padding = {u"@"});
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parser->addMatcher(parser->fLocalMatchers.scientific = {symbols, grouper});
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parser->addMatcher(parser->fLocalMatchers.currency = {currencySymbols, symbols, status});
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// parser.addMatcher(new RequireNumberMatcher());
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parser->freeze();
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return parser.orphan();
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}
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NumberParserImpl*
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NumberParserImpl::createParserFromProperties(const number::impl::DecimalFormatProperties& properties,
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const DecimalFormatSymbols& symbols, bool parseCurrency,
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UErrorCode& status) {
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Locale locale = symbols.getLocale();
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PropertiesAffixPatternProvider localPAPP;
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CurrencyPluralInfoAffixProvider localCPIAP;
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AffixPatternProvider* affixProvider;
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if (properties.currencyPluralInfo.fPtr.isNull()) {
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localPAPP.setTo(properties, status);
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affixProvider = &localPAPP;
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} else {
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localCPIAP.setTo(*properties.currencyPluralInfo.fPtr, properties, status);
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affixProvider = &localCPIAP;
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}
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if (affixProvider == nullptr || U_FAILURE(status)) { return nullptr; }
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CurrencyUnit currency = resolveCurrency(properties, locale, status);
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CurrencySymbols currencySymbols(currency, locale, symbols, status);
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bool isStrict = properties.parseMode.getOrDefault(PARSE_MODE_STRICT) == PARSE_MODE_STRICT;
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Grouper grouper = Grouper::forProperties(properties);
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int parseFlags = 0;
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if (affixProvider == nullptr || U_FAILURE(status)) { return nullptr; }
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// Fraction grouping is disabled by default because it has never been supported in DecimalFormat
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parseFlags |= PARSE_FLAG_FRACTION_GROUPING_DISABLED;
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if (!properties.parseCaseSensitive) {
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parseFlags |= PARSE_FLAG_IGNORE_CASE;
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}
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if (properties.parseIntegerOnly) {
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parseFlags |= PARSE_FLAG_INTEGER_ONLY;
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}
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if (properties.signAlwaysShown) {
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parseFlags |= PARSE_FLAG_PLUS_SIGN_ALLOWED;
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}
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if (isStrict) {
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parseFlags |= PARSE_FLAG_STRICT_GROUPING_SIZE;
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parseFlags |= PARSE_FLAG_STRICT_SEPARATORS;
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parseFlags |= PARSE_FLAG_USE_FULL_AFFIXES;
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parseFlags |= PARSE_FLAG_EXACT_AFFIX;
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} else {
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parseFlags |= PARSE_FLAG_INCLUDE_UNPAIRED_AFFIXES;
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}
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if (grouper.getPrimary() <= 0) {
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parseFlags |= PARSE_FLAG_GROUPING_DISABLED;
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}
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if (parseCurrency || affixProvider->hasCurrencySign()) {
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parseFlags |= PARSE_FLAG_MONETARY_SEPARATORS;
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}
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LocalPointer<NumberParserImpl> parser(new NumberParserImpl(parseFlags));
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parser->fLocalMatchers.ignorables = {
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isStrict ? unisets::STRICT_IGNORABLES : unisets::DEFAULT_IGNORABLES};
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IgnorablesMatcher& ignorables = parser->fLocalMatchers.ignorables;
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//////////////////////
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/// AFFIX MATCHERS ///
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//////////////////////
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// The following statements set up the affix matchers.
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AffixTokenMatcherSetupData affixSetupData = {
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currencySymbols, symbols, ignorables, locale};
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parser->fLocalMatchers.affixTokenMatcherWarehouse = {&affixSetupData};
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parser->fLocalMatchers.affixMatcherWarehouse = {&parser->fLocalMatchers.affixTokenMatcherWarehouse};
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parser->fLocalMatchers.affixMatcherWarehouse.createAffixMatchers(
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*affixProvider, *parser, ignorables, parseFlags, status);
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////////////////////////
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/// CURRENCY MATCHER ///
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////////////////////////
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if (parseCurrency || affixProvider->hasCurrencySign()) {
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parser->addMatcher(parser->fLocalMatchers.currency = {currencySymbols, symbols, status});
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}
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///////////////
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/// PERCENT ///
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///////////////
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// ICU-TC meeting, April 11, 2018: accept percent/permille only if it is in the pattern,
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// and to maintain regressive behavior, divide by 100 even if no percent sign is present.
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if (affixProvider->containsSymbolType(AffixPatternType::TYPE_PERCENT, status)) {
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parser->addMatcher(parser->fLocalMatchers.percent = {symbols});
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}
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if (affixProvider->containsSymbolType(AffixPatternType::TYPE_PERMILLE, status)) {
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parser->addMatcher(parser->fLocalMatchers.permille = {symbols});
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}
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///////////////////////////////
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/// OTHER STANDARD MATCHERS ///
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///////////////////////////////
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if (!isStrict) {
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parser->addMatcher(parser->fLocalMatchers.plusSign = {symbols, false});
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parser->addMatcher(parser->fLocalMatchers.minusSign = {symbols, false});
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}
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parser->addMatcher(parser->fLocalMatchers.nan = {symbols});
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parser->addMatcher(parser->fLocalMatchers.infinity = {symbols});
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UnicodeString padString = properties.padString;
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if (!padString.isBogus() && !ignorables.getSet()->contains(padString)) {
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parser->addMatcher(parser->fLocalMatchers.padding = {padString});
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}
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parser->addMatcher(parser->fLocalMatchers.ignorables);
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parser->addMatcher(parser->fLocalMatchers.decimal = {symbols, grouper, parseFlags});
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if (!properties.parseNoExponent) {
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parser->addMatcher(parser->fLocalMatchers.scientific = {symbols, grouper});
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}
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//////////////////
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/// VALIDATORS ///
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//////////////////
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parser->addMatcher(parser->fLocalValidators.number = {});
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if (isStrict) {
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parser->addMatcher(parser->fLocalValidators.affix = {});
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}
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if (isStrict && properties.minimumExponentDigits > 0) {
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parser->addMatcher(parser->fLocalValidators.exponent = {});
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}
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if (parseCurrency) {
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parser->addMatcher(parser->fLocalValidators.currency = {});
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}
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if (properties.decimalPatternMatchRequired) {
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bool patternHasDecimalSeparator =
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properties.decimalSeparatorAlwaysShown || properties.maximumFractionDigits != 0;
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parser->addMatcher(parser->fLocalValidators.decimalSeparator = {patternHasDecimalSeparator});
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}
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// The multiplier takes care of scaling percentages.
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Multiplier multiplier = multiplierFromProperties(properties);
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if (multiplier.isValid()) {
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parser->addMatcher(parser->fLocalValidators.multiplier = {multiplier});
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}
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parser->freeze();
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return parser.orphan();
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}
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NumberParserImpl::NumberParserImpl(parse_flags_t parseFlags)
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: fParseFlags(parseFlags) {
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}
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NumberParserImpl::~NumberParserImpl() {
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fNumMatchers = 0;
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}
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void NumberParserImpl::addMatcher(NumberParseMatcher& matcher) {
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if (fNumMatchers + 1 > fMatchers.getCapacity()) {
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fMatchers.resize(fNumMatchers * 2, fNumMatchers);
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}
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fMatchers[fNumMatchers] = &matcher;
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fNumMatchers++;
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}
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void NumberParserImpl::freeze() {
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fFrozen = true;
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}
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void NumberParserImpl::parse(const UnicodeString& input, bool greedy, ParsedNumber& result,
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UErrorCode& status) const {
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return parse(input, 0, greedy, result, status);
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}
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void NumberParserImpl::parse(const UnicodeString& input, int32_t start, bool greedy, ParsedNumber& result,
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UErrorCode& status) const {
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U_ASSERT(fFrozen);
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// TODO: Check start >= 0 and start < input.length()
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StringSegment segment(input, 0 != (fParseFlags & PARSE_FLAG_IGNORE_CASE));
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segment.adjustOffset(start);
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if (greedy) {
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parseGreedyRecursive(segment, result, status);
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} else {
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parseLongestRecursive(segment, result, status);
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}
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for (int32_t i = 0; i < fNumMatchers; i++) {
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fMatchers[i]->postProcess(result);
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}
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result.postProcess();
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}
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void NumberParserImpl::parseGreedyRecursive(StringSegment& segment, ParsedNumber& result,
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UErrorCode& status) const {
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// Base Case
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if (segment.length() == 0) {
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return;
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}
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int initialOffset = segment.getOffset();
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for (int32_t i = 0; i < fNumMatchers; i++) {
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const NumberParseMatcher* matcher = fMatchers[i];
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if (!matcher->smokeTest(segment)) {
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continue;
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}
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matcher->match(segment, result, status);
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if (U_FAILURE(status)) {
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return;
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}
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if (segment.getOffset() != initialOffset) {
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// In a greedy parse, recurse on only the first match.
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parseGreedyRecursive(segment, result, status);
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// The following line resets the offset so that the StringSegment says the same across
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// the function
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// call boundary. Since we recurse only once, this line is not strictly necessary.
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segment.setOffset(initialOffset);
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return;
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}
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}
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// NOTE: If we get here, the greedy parse completed without consuming the entire string.
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}
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void NumberParserImpl::parseLongestRecursive(StringSegment& segment, ParsedNumber& result,
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UErrorCode& status) const {
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// Base Case
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if (segment.length() == 0) {
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return;
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}
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// TODO: Give a nice way for the matcher to reset the ParsedNumber?
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ParsedNumber initial(result);
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ParsedNumber candidate;
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int initialOffset = segment.getOffset();
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for (int32_t i = 0; i < fNumMatchers; i++) {
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const NumberParseMatcher* matcher = fMatchers[i];
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if (!matcher->smokeTest(segment)) {
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continue;
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}
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// In a non-greedy parse, we attempt all possible matches and pick the best.
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for (int32_t charsToConsume = 0; charsToConsume < segment.length();) {
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charsToConsume += U16_LENGTH(segment.codePointAt(charsToConsume));
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// Run the matcher on a segment of the current length.
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candidate = initial;
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segment.setLength(charsToConsume);
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bool maybeMore = matcher->match(segment, candidate, status);
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segment.resetLength();
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if (U_FAILURE(status)) {
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return;
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}
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// If the entire segment was consumed, recurse.
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if (segment.getOffset() - initialOffset == charsToConsume) {
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parseLongestRecursive(segment, candidate, status);
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if (U_FAILURE(status)) {
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return;
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}
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if (candidate.isBetterThan(result)) {
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result = candidate;
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}
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}
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// Since the segment can be re-used, reset the offset.
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// This does not have an effect if the matcher did not consume any chars.
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segment.setOffset(initialOffset);
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// Unless the matcher wants to see the next char, continue to the next matcher.
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if (!maybeMore) {
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break;
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}
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}
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}
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}
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UnicodeString NumberParserImpl::toString() const {
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UnicodeString result(u"<NumberParserImpl matchers:[");
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for (int32_t i = 0; i < fNumMatchers; i++) {
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result.append(u' ');
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result.append(fMatchers[i]->toString());
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}
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result.append(u" ]>", -1);
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return result;
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}
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#endif /* #if !UCONFIG_NO_FORMATTING */
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