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-// © 2016 and later: Unicode, Inc. and others.
-// License & terms of use: http://www.unicode.org/copyright.html
-/*
-*******************************************************************************
-* Copyright (C) 2015, International Business Machines Corporation and *
-* others. All Rights Reserved. *
-*******************************************************************************
-*/
-
-#ifndef VALUEFORMATTER_H
-#define VALUEFORMATTER_H
-
-#if !UCONFIG_NO_FORMATTING
-
-#include "unicode/uobject.h"
-#include "unicode/utypes.h"
-
-
-
-U_NAMESPACE_BEGIN
-
-class UnicodeString;
-class DigitList;
-class FieldPositionHandler;
-class DigitGrouping;
-class PluralRules;
-class FixedPrecision;
-class DigitFormatter;
-class DigitFormatterOptions;
-class ScientificPrecision;
-class SciFormatterOptions;
-class FixedDecimal;
-class VisibleDigitsWithExponent;
-
-
-/**
- * A closure around rounding and formatting a value. As these instances are
- * designed to be short lived (they only exist while formatting a value), they
- * do not own their own attributes. Rather the caller maintains ownership of
- * all attributes. A caller first calls a prepareXXX method on an instance
- * to share its data before using that instance. Using an
- * instance without first calling a prepareXXX method results in an
- * assertion error and a program crash.
- */
-class U_I18N_API ValueFormatter : public UObject {
-public:
- ValueFormatter() : fType(kFormatTypeCount) {
- }
-
- virtual ~ValueFormatter();
-
- /**
- * This function is here only to support the protected round() method
- * in DecimalFormat. It serves no ther purpose than that.
- *
- * @param value this value is rounded in place.
- * @param status any error returned here.
- */
- DigitList &round(DigitList &value, UErrorCode &status) const;
-
- /**
- * Returns TRUE if the absolute value of value can be fast formatted
- * using ValueFormatter::formatInt32.
- */
- UBool isFastFormattable(int32_t value) const;
-
- /**
- * Converts value to a VisibleDigitsWithExponent.
- * Result may be fixed point or scientific.
- */
- VisibleDigitsWithExponent &toVisibleDigitsWithExponent(
- int64_t value,
- VisibleDigitsWithExponent &digits,
- UErrorCode &status) const;
-
- /**
- * Converts value to a VisibleDigitsWithExponent.
- * Result may be fixed point or scientific.
- */
- VisibleDigitsWithExponent &toVisibleDigitsWithExponent(
- DigitList &value,
- VisibleDigitsWithExponent &digits,
- UErrorCode &status) const;
-
- /**
- * formats positiveValue and appends to appendTo. Returns appendTo.
- * @param positiveValue If negative, no negative sign is formatted.
- * @param handler stores the field positions
- * @param appendTo formatted value appended here.
- */
- UnicodeString &format(
- const VisibleDigitsWithExponent &positiveValue,
- FieldPositionHandler &handler,
- UnicodeString &appendTo) const;
-
-
- /**
- * formats positiveValue and appends to appendTo. Returns appendTo.
- * value must be positive. Calling formatInt32 to format a value when
- * isFastFormattable indicates that the value cannot be fast formatted
- * results in undefined behavior.
- */
- UnicodeString &formatInt32(
- int32_t positiveValue,
- FieldPositionHandler &handler,
- UnicodeString &appendTo) const;
-
- /**
- * Returns the number of code points needed to format.
- * @param positiveValue if negative, the negative sign is not included
- * in count.
- */
- int32_t countChar32(
- const VisibleDigitsWithExponent &positiveValue) const;
-
- /**
- * Prepares this instance for fixed decimal formatting.
- */
- void prepareFixedDecimalFormatting(
- const DigitFormatter &formatter,
- const DigitGrouping &grouping,
- const FixedPrecision &precision,
- const DigitFormatterOptions &options);
-
- /**
- * Prepares this instance for scientific formatting.
- */
- void prepareScientificFormatting(
- const DigitFormatter &formatter,
- const ScientificPrecision &precision,
- const SciFormatterOptions &options);
-
-private:
- ValueFormatter(const ValueFormatter &);
- ValueFormatter &operator=(const ValueFormatter &);
- enum FormatType {
- kFixedDecimal,
- kScientificNotation,
- kFormatTypeCount
- };
-
- FormatType fType;
-
- // for fixed decimal and scientific formatting
- const DigitFormatter *fDigitFormatter;
-
- // for fixed decimal formatting
- const FixedPrecision *fFixedPrecision;
- const DigitFormatterOptions *fFixedOptions;
- const DigitGrouping *fGrouping;
-
- // for scientific formatting
- const ScientificPrecision *fScientificPrecision;
- const SciFormatterOptions *fScientificOptions;
-};
-
-U_NAMESPACE_END
-
-#endif /* !UCONFIG_NO_FORMATTING */
-
-#endif /* VALUEFORMATTER_H */