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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#include <_foundation_unicode/utypes.h>
#if !UCONFIG_NO_FORMATTING
// Allow implicit conversion from char16_t* to UnicodeString for this file:
// Helpful in toString methods and elsewhere.
#define UNISTR_FROM_STRING_EXPLICIT
#include <typeinfo>
#include <array>
#include "number_types.h"
#include "number_patternstring.h"
#include "numparse_types.h"
#include "numparse_impl.h"
#include "numparse_symbols.h"
#include "numparse_decimal.h"
#include <_foundation_unicode/numberformatter.h>
#include "cstr.h"
#include "number_mapper.h"
#include "static_unicode_sets.h"
using namespace icu;
using namespace icu::number;
using namespace icu::number::impl;
using namespace icu::numparse;
using namespace icu::numparse::impl;
NumberParseMatcher::~NumberParseMatcher() = default;
NumberParserImpl*
NumberParserImpl::createSimpleParser(const Locale& locale, const UnicodeString& patternString,
parse_flags_t parseFlags, UErrorCode& status) {
LocalPointer<NumberParserImpl> parser(new NumberParserImpl(parseFlags));
DecimalFormatSymbols symbols(locale, status);
parser->fLocalMatchers.ignorables = {parseFlags};
IgnorablesMatcher& ignorables = parser->fLocalMatchers.ignorables;
DecimalFormatSymbols dfs(locale, status);
dfs.setSymbol(DecimalFormatSymbols::kCurrencySymbol, u"IU$");
dfs.setSymbol(DecimalFormatSymbols::kIntlCurrencySymbol, u"ICU");
CurrencySymbols currencySymbols({u"ICU", status}, locale, dfs, status);
ParsedPatternInfo patternInfo;
PatternParser::parseToPatternInfo(patternString, patternInfo, status);
// The following statements set up the affix matchers.
AffixTokenMatcherSetupData affixSetupData = {
currencySymbols, symbols, ignorables, locale, parseFlags};
parser->fLocalMatchers.affixTokenMatcherWarehouse = {&affixSetupData};
parser->fLocalMatchers.affixMatcherWarehouse = {&parser->fLocalMatchers.affixTokenMatcherWarehouse};
parser->fLocalMatchers.affixMatcherWarehouse.createAffixMatchers(
patternInfo, *parser, ignorables, parseFlags, status);
Grouper grouper = Grouper::forStrategy(UNUM_GROUPING_AUTO);
grouper.setLocaleData(patternInfo, locale);
parser->addMatcher(parser->fLocalMatchers.ignorables);
parser->addMatcher(parser->fLocalMatchers.decimal = {symbols, grouper, parseFlags});
parser->addMatcher(parser->fLocalMatchers.minusSign = {symbols, false});
parser->addMatcher(parser->fLocalMatchers.plusSign = {symbols, false});
parser->addMatcher(parser->fLocalMatchers.percent = {symbols});
parser->addMatcher(parser->fLocalMatchers.permille = {symbols});
parser->addMatcher(parser->fLocalMatchers.nan = {symbols});
parser->addMatcher(parser->fLocalMatchers.infinity = {symbols});
parser->addMatcher(parser->fLocalMatchers.padding = {u"@"});
parser->addMatcher(parser->fLocalMatchers.scientific = {symbols, grouper});
parser->addMatcher(parser->fLocalMatchers.currency = {currencySymbols, symbols, parseFlags, status});
parser->addMatcher(parser->fLocalValidators.number = {});
parser->freeze();
return parser.orphan();
}
NumberParserImpl*
NumberParserImpl::createParserFromProperties(const number::impl::DecimalFormatProperties& properties,
const DecimalFormatSymbols& symbols, bool parseCurrency,
UErrorCode& status) {
Locale locale = symbols.getLocale();
AutoAffixPatternProvider affixProvider(properties, status);
if (U_FAILURE(status)) { return nullptr; }
CurrencyUnit currency = resolveCurrency(properties, locale, status);
CurrencySymbols currencySymbols(currency, locale, symbols, status);
bool isStrict = properties.parseMode.getOrDefault(PARSE_MODE_STRICT) == PARSE_MODE_STRICT;
Grouper grouper = Grouper::forProperties(properties);
int parseFlags = 0;
if (U_FAILURE(status)) { return nullptr; }
if (!properties.parseCaseSensitive) {
parseFlags |= PARSE_FLAG_IGNORE_CASE;
}
if (properties.parseIntegerOnly) {
parseFlags |= PARSE_FLAG_INTEGER_ONLY;
}
if (properties.signAlwaysShown) {
parseFlags |= PARSE_FLAG_PLUS_SIGN_ALLOWED;
}
if (isStrict) {
parseFlags |= PARSE_FLAG_STRICT_GROUPING_SIZE;
parseFlags |= PARSE_FLAG_STRICT_SEPARATORS;
parseFlags |= PARSE_FLAG_USE_FULL_AFFIXES;
parseFlags |= PARSE_FLAG_EXACT_AFFIX;
parseFlags |= PARSE_FLAG_STRICT_IGNORABLES;
} else {
parseFlags |= PARSE_FLAG_INCLUDE_UNPAIRED_AFFIXES;
}
if (grouper.getPrimary() <= 0) {
parseFlags |= PARSE_FLAG_GROUPING_DISABLED;
}
if (parseCurrency || affixProvider.get().hasCurrencySign()) {
parseFlags |= PARSE_FLAG_MONETARY_SEPARATORS;
}
if (!parseCurrency) {
parseFlags |= PARSE_FLAG_NO_FOREIGN_CURRENCY;
}
LocalPointer<NumberParserImpl> parser(new NumberParserImpl(parseFlags));
parser->fLocalMatchers.ignorables = {parseFlags};
IgnorablesMatcher& ignorables = parser->fLocalMatchers.ignorables;
//////////////////////
/// AFFIX MATCHERS ///
//////////////////////
// The following statements set up the affix matchers.
AffixTokenMatcherSetupData affixSetupData = {
currencySymbols, symbols, ignorables, locale, parseFlags};
parser->fLocalMatchers.affixTokenMatcherWarehouse = {&affixSetupData};
parser->fLocalMatchers.affixMatcherWarehouse = {&parser->fLocalMatchers.affixTokenMatcherWarehouse};
parser->fLocalMatchers.affixMatcherWarehouse.createAffixMatchers(
affixProvider.get(), *parser, ignorables, parseFlags, status);
////////////////////////
/// CURRENCY MATCHER ///
////////////////////////
if (parseCurrency || affixProvider.get().hasCurrencySign()) {
parser->addMatcher(parser->fLocalMatchers.currency = {currencySymbols, symbols, parseFlags, status});
}
///////////////
/// PERCENT ///
///////////////
// ICU-TC meeting, April 11, 2018: accept percent/permille only if it is in the pattern,
// and to maintain regressive behavior, divide by 100 even if no percent sign is present.
if (!isStrict && affixProvider.get().containsSymbolType(AffixPatternType::TYPE_PERCENT, status)) {
parser->addMatcher(parser->fLocalMatchers.percent = {symbols});
}
if (!isStrict && affixProvider.get().containsSymbolType(AffixPatternType::TYPE_PERMILLE, status)) {
parser->addMatcher(parser->fLocalMatchers.permille = {symbols});
}
///////////////////////////////
/// OTHER STANDARD MATCHERS ///
///////////////////////////////
if (!isStrict) {
parser->addMatcher(parser->fLocalMatchers.plusSign = {symbols, false});
parser->addMatcher(parser->fLocalMatchers.minusSign = {symbols, false});
}
parser->addMatcher(parser->fLocalMatchers.nan = {symbols});
parser->addMatcher(parser->fLocalMatchers.infinity = {symbols});
UnicodeString padString = properties.padString;
if (!padString.isBogus() && !ignorables.getSet()->contains(padString)) {
parser->addMatcher(parser->fLocalMatchers.padding = {padString});
}
parser->addMatcher(parser->fLocalMatchers.ignorables);
parser->addMatcher(parser->fLocalMatchers.decimal = {symbols, grouper, parseFlags});
// NOTE: parseNoExponent doesn't disable scientific parsing if we have a scientific formatter
if (!properties.parseNoExponent || properties.minimumExponentDigits > 0) {
parser->addMatcher(parser->fLocalMatchers.scientific = {symbols, grouper});
}
//////////////////
/// VALIDATORS ///
//////////////////
parser->addMatcher(parser->fLocalValidators.number = {});
if (isStrict) {
parser->addMatcher(parser->fLocalValidators.affix = {});
}
if (parseCurrency) {
parser->addMatcher(parser->fLocalValidators.currency = {});
}
if (properties.decimalPatternMatchRequired) {
bool patternHasDecimalSeparator =
properties.decimalSeparatorAlwaysShown || properties.maximumFractionDigits != 0;
parser->addMatcher(parser->fLocalValidators.decimalSeparator = {patternHasDecimalSeparator});
}
// The multiplier takes care of scaling percentages.
Scale multiplier = scaleFromProperties(properties);
if (multiplier.isValid()) {
parser->addMatcher(parser->fLocalValidators.multiplier = {multiplier});
}
parser->freeze();
return parser.orphan();
}
NumberParserImpl::NumberParserImpl(parse_flags_t parseFlags)
: fParseFlags(parseFlags) {
}
NumberParserImpl::~NumberParserImpl() {
fNumMatchers = 0;
}
void NumberParserImpl::addMatcher(NumberParseMatcher& matcher) {
if (fNumMatchers + 1 > fMatchers.getCapacity()) {
fMatchers.resize(fNumMatchers * 2, fNumMatchers);
}
fMatchers[fNumMatchers] = &matcher;
fNumMatchers++;
}
void NumberParserImpl::freeze() {
fFrozen = true;
}
parse_flags_t NumberParserImpl::getParseFlags() const {
return fParseFlags;
}
void NumberParserImpl::parse(const UnicodeString& input, bool greedy, ParsedNumber& result,
UErrorCode& status) const {
return parse(input, 0, greedy, result, status);
}
void NumberParserImpl::parse(const UnicodeString& input, int32_t start, bool greedy, ParsedNumber& result,
UErrorCode& status) const {
if (U_FAILURE(status)) {
return;
}
U_ASSERT(fFrozen);
// TODO: Check start >= 0 and start < input.length()
StringSegment segment(input, 0 != (fParseFlags & PARSE_FLAG_IGNORE_CASE));
segment.adjustOffset(start);
if (greedy) {
parseGreedy(segment, result, status);
} else if (0 != (fParseFlags & PARSE_FLAG_ALLOW_INFINITE_RECURSION)) {
// Start at 1 so that recursionLevels never gets to 0
parseLongestRecursive(segment, result, 1, status);
} else {
// Arbitrary recursion safety limit: 100 levels.
parseLongestRecursive(segment, result, -100, status);
}
for (int32_t i = 0; i < fNumMatchers; i++) {
fMatchers[i]->postProcess(result);
}
result.postProcess();
}
void NumberParserImpl::parseGreedy(StringSegment& segment, ParsedNumber& result,
UErrorCode& status) const {
// Note: this method is not recursive in order to avoid stack overflow.
for (int i = 0; i <fNumMatchers;) {
// Base Case
if (segment.length() == 0) {
return;
}
const NumberParseMatcher* matcher = fMatchers[i];
if (!matcher->smokeTest(segment)) {
// Matcher failed smoke test: try the next one
i++;
continue;
}
int32_t initialOffset = segment.getOffset();
matcher->match(segment, result, status);
if (U_FAILURE(status)) {
return;
}
if (segment.getOffset() != initialOffset) {
// Greedy heuristic: accept the match and loop back
i = 0;
continue;
} else {
// Matcher did not match: try the next one
i++;
continue;
}
UPRV_UNREACHABLE_EXIT;
}
// NOTE: If we get here, the greedy parse completed without consuming the entire string.
}
void NumberParserImpl::parseLongestRecursive(StringSegment& segment, ParsedNumber& result,
int32_t recursionLevels,
UErrorCode& status) const {
// Base Case
if (segment.length() == 0) {
return;
}
// Safety against stack overflow
if (recursionLevels == 0) {
return;
}
// TODO: Give a nice way for the matcher to reset the ParsedNumber?
ParsedNumber initial(result);
ParsedNumber candidate;
int initialOffset = segment.getOffset();
for (int32_t i = 0; i < fNumMatchers; i++) {
const NumberParseMatcher* matcher = fMatchers[i];
if (!matcher->smokeTest(segment)) {
continue;
}
// In a non-greedy parse, we attempt all possible matches and pick the best.
for (int32_t charsToConsume = 0; charsToConsume < segment.length();) {
charsToConsume += U16_LENGTH(segment.codePointAt(charsToConsume));
// Run the matcher on a segment of the current length.
candidate = initial;
segment.setLength(charsToConsume);
bool maybeMore = matcher->match(segment, candidate, status);
segment.resetLength();
if (U_FAILURE(status)) {
return;
}
// If the entire segment was consumed, recurse.
if (segment.getOffset() - initialOffset == charsToConsume) {
parseLongestRecursive(segment, candidate, recursionLevels + 1, status);
if (U_FAILURE(status)) {
return;
}
if (candidate.isBetterThan(result)) {
result = candidate;
}
}
// Since the segment can be re-used, reset the offset.
// This does not have an effect if the matcher did not consume any chars.
segment.setOffset(initialOffset);
// Unless the matcher wants to see the next char, continue to the next matcher.
if (!maybeMore) {
break;
}
}
}
}
UnicodeString NumberParserImpl::toString() const {
UnicodeString result(u"<NumberParserImpl matchers:[");
for (int32_t i = 0; i < fNumMatchers; i++) {
result.append(u' ');
result.append(fMatchers[i]->toString());
}
result.append(u" ]>", -1);
return result;
}
#endif /* #if !UCONFIG_NO_FORMATTING */
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