134 lines
4.3 KiB
C++
134 lines
4.3 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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#ifndef __NUMPARSE_AFFIXES_H__
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#define __NUMPARSE_AFFIXES_H__
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#include "numparse_types.h"
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#include "numparse_symbols.h"
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#include "numparse_currency.h"
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#include "number_affixutils.h"
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U_NAMESPACE_BEGIN namespace numparse {
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namespace impl {
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// Forward-declaration of implementation classes for friending
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class AffixPatternMatcherBuilder;
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class AffixPatternMatcher;
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class CodePointMatcher : public NumberParseMatcher, public UMemory {
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public:
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CodePointMatcher() = default; // WARNING: Leaves the object in an unusable state
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CodePointMatcher(UChar32 cp);
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bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
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const UnicodeSet& getLeadCodePoints() override;
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private:
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UChar32 fCp;
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};
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/**
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* Small helper class that generates matchers for individual tokens for AffixPatternMatcher.
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*
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* In Java, this is called AffixTokenMatcherFactory (a "factory"). However, in C++, it is called a
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* "warehouse", because in addition to generating the matchers, it also retains ownership of them. The
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* warehouse must stay in scope for the whole lifespan of the AffixPatternMatcher that uses matchers from
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* the warehouse.
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*
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* @author sffc
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*/
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class AffixTokenMatcherWarehouse {
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private:
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static constexpr int32_t CODE_POINT_STACK_CAPACITY = 5; // Number of entries directly on the stack
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static constexpr int32_t CODE_POINT_BATCH_SIZE = 10; // Number of entries per heap allocation
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public:
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AffixTokenMatcherWarehouse(const UChar* currencyCode, const UnicodeString& currency1,
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const UnicodeString& currency2, const DecimalFormatSymbols& dfs,
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IgnorablesMatcher* ignorables, const Locale& locale);
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~AffixTokenMatcherWarehouse();
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CodePointMatcher& nextCodePointMatcher(UChar32 cp);
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private:
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UChar currencyCode[4];
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const UnicodeString& currency1;
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const UnicodeString& currency2;
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const DecimalFormatSymbols& dfs;
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IgnorablesMatcher* ignorables;
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const Locale locale;
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// NOTE: These are default-constructed and should not be used until initialized.
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MinusSignMatcher minusSign;
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PlusSignMatcher plusSign;
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PercentMatcher percent;
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PermilleMatcher permille;
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CurrencyAnyMatcher currency;
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CodePointMatcher codePoints[CODE_POINT_STACK_CAPACITY]; // By value
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MaybeStackArray<CodePointMatcher*, 3> codePointsOverflow; // On heap in "batches"
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int32_t codePointCount; // Total for both the ones by value and on heap
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int32_t codePointNumBatches; // Number of batches in codePointsOverflow
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friend class AffixPatternMatcherBuilder;
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friend class AffixPatternMatcher;
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};
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class AffixPatternMatcherBuilder : public ::icu::number::impl::TokenConsumer {
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public:
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AffixPatternMatcherBuilder(const UnicodeString& pattern, AffixTokenMatcherWarehouse& warehouse,
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IgnorablesMatcher* ignorables);
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void consumeToken(::icu::number::impl::AffixPatternType type, UChar32 cp, UErrorCode& status) override;
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/** NOTE: You can build only once! */
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AffixPatternMatcher build();
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private:
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ArraySeriesMatcher::MatcherArray fMatchers;
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int32_t fMatchersLen;
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int32_t fLastTypeOrCp;
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const UnicodeString& fPattern;
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AffixTokenMatcherWarehouse& fWarehouse;
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IgnorablesMatcher* fIgnorables;
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void addMatcher(NumberParseMatcher& matcher);
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};
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class AffixPatternMatcher : public ArraySeriesMatcher {
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public:
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static AffixPatternMatcher fromAffixPattern(const UnicodeString& affixPattern,
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AffixTokenMatcherWarehouse& warehouse,
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parse_flags_t parseFlags, bool* success,
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UErrorCode& status);
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private:
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UnicodeString fPattern;
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AffixPatternMatcher() = default; // WARNING: Leaves the object in an unusable state
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AffixPatternMatcher(MatcherArray& matchers, int32_t matchersLen, const UnicodeString& pattern);
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friend class AffixPatternMatcherBuilder;
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};
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} // namespace impl
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} // namespace numparse
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U_NAMESPACE_END
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#endif //__NUMPARSE_AFFIXES_H__
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#endif /* #if !UCONFIG_NO_FORMATTING */
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