simplenumberformatter.h

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// © 2022 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#ifndef __SIMPLENUMBERFORMATTERH__
#define __SIMPLENUMBERFORMATTERH__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

#include "unicode/dcfmtsym.h"
#include "unicode/usimplenumberformatter.h"
#include "unicode/formattednumber.h"

U_NAMESPACE_BEGIN

/* forward declaration */
class SimpleDateFormat;

namespace number {  // icu::number


namespace impl {
class UFormattedNumberData;
struct SimpleMicroProps;
class AdoptingSignumModifierStore;
}  // icu::number::impl


class U_I18N_API SimpleNumber : public UMemory {
  public:
    static SimpleNumber forInt64(int64_t value, UErrorCode& status);

    void multiplyByPowerOfTen(int32_t power, UErrorCode& status);

    void roundTo(int32_t power, UNumberFormatRoundingMode roundingMode, UErrorCode& status);

    void setMaximumIntegerDigits(uint32_t maximumIntegerDigits, UErrorCode& status);

    void setMinimumIntegerDigits(uint32_t minimumIntegerDigits, UErrorCode& status);

    void setMinimumFractionDigits(uint32_t minimumFractionDigits, UErrorCode& status);

    void setSign(USimpleNumberSign sign, UErrorCode& status);

    SimpleNumber() = default;

    ~SimpleNumber() {
        cleanup();
    }

    SimpleNumber(SimpleNumber&& other) noexcept {
        fData = other.fData;
        fSign = other.fSign;
        other.fData = nullptr;
    }

    SimpleNumber& operator=(SimpleNumber&& other) noexcept {
        cleanup();
        fData = other.fData;
        fSign = other.fSign;
        other.fData = nullptr;
        return *this;
    }

  private:
    SimpleNumber(impl::UFormattedNumberData* data, UErrorCode& status);
    SimpleNumber(const SimpleNumber&) = delete;
    SimpleNumber& operator=(const SimpleNumber&) = delete;

    void cleanup();

    impl::UFormattedNumberData* fData = nullptr;
    USimpleNumberSign fSign = UNUM_SIMPLE_NUMBER_NO_SIGN;

    friend class SimpleNumberFormatter;

    // Uses the private constructor to avoid a heap allocation
    friend class icu::SimpleDateFormat;
};


class U_I18N_API SimpleNumberFormatter : public UMemory {
  public:
    static SimpleNumberFormatter forLocale(
        const icu::Locale &locale,
        UErrorCode &status);

    static SimpleNumberFormatter forLocaleAndGroupingStrategy(
        const icu::Locale &locale,
        UNumberGroupingStrategy groupingStrategy,
        UErrorCode &status);

    static SimpleNumberFormatter forLocaleAndSymbolsAndGroupingStrategy(
        const icu::Locale &locale,
        const DecimalFormatSymbols &symbols,
        UNumberGroupingStrategy groupingStrategy,
        UErrorCode &status);

    FormattedNumber format(SimpleNumber value, UErrorCode &status) const;

    FormattedNumber formatInt64(int64_t value, UErrorCode &status) const {
        return format(SimpleNumber::forInt64(value, status), status);
    }

#ifndef U_HIDE_INTERNAL_API

    void formatImpl(impl::UFormattedNumberData* data, USimpleNumberSign sign, UErrorCode& status) const;
#endif // U_HIDE_INTERNAL_API

    ~SimpleNumberFormatter() {
        cleanup();
    }

    SimpleNumberFormatter() = default;

    SimpleNumberFormatter(SimpleNumberFormatter&& other) noexcept {
        fGroupingStrategy = other.fGroupingStrategy;
        fOwnedSymbols = other.fOwnedSymbols;
        fMicros = other.fMicros;
        fPatternModifier = other.fPatternModifier;
        other.fOwnedSymbols = nullptr;
        other.fMicros = nullptr;
        other.fPatternModifier = nullptr;
    }

    SimpleNumberFormatter& operator=(SimpleNumberFormatter&& other) noexcept {
        cleanup();
        fGroupingStrategy = other.fGroupingStrategy;
        fOwnedSymbols = other.fOwnedSymbols;
        fMicros = other.fMicros;
        fPatternModifier = other.fPatternModifier;
        other.fOwnedSymbols = nullptr;
        other.fMicros = nullptr;
        other.fPatternModifier = nullptr;
        return *this;
    }

  private:
    void initialize(
        const icu::Locale &locale,
        const DecimalFormatSymbols &symbols,
        UNumberGroupingStrategy groupingStrategy,
        UErrorCode &status);

    void cleanup();

    SimpleNumberFormatter(const SimpleNumberFormatter&) = delete;

    SimpleNumberFormatter& operator=(const SimpleNumberFormatter&) = delete;

    UNumberGroupingStrategy fGroupingStrategy = UNUM_GROUPING_AUTO;

    // Owned Pointers:
    DecimalFormatSymbols* fOwnedSymbols = nullptr; // can be empty
    impl::SimpleMicroProps* fMicros = nullptr;
    impl::AdoptingSignumModifierStore* fPatternModifier = nullptr;
};


}  // namespace number
U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // __SIMPLENUMBERFORMATTERH__