diff options
Diffstat (limited to 'deps/icu-small/source/i18n/number_decimalquantity.h')
| -rw-r--r-- | deps/icu-small/source/i18n/number_decimalquantity.h | 92 |
1 files changed, 66 insertions, 26 deletions
diff --git a/deps/icu-small/source/i18n/number_decimalquantity.h b/deps/icu-small/source/i18n/number_decimalquantity.h index 4309c3c638..8e04dea7eb 100644 --- a/deps/icu-small/source/i18n/number_decimalquantity.h +++ b/deps/icu-small/source/i18n/number_decimalquantity.h @@ -3,13 +3,12 @@ #include "unicode/utypes.h" -#if !UCONFIG_NO_FORMATTING && !UPRV_INCOMPLETE_CPP11_SUPPORT +#if !UCONFIG_NO_FORMATTING #ifndef __NUMBER_DECIMALQUANTITY_H__ #define __NUMBER_DECIMALQUANTITY_H__ #include <cstdint> #include "unicode/umachine.h" -#include "decNumber.h" #include "standardplural.h" #include "plurrule_impl.h" #include "number_types.h" @@ -17,6 +16,9 @@ U_NAMESPACE_BEGIN namespace number { namespace impl { +// Forward-declare (maybe don't want number_utils.h included here): +class DecNum; + /** * An class for representing a number to be processed by the decimal formatting pipeline. Includes * methods for rounding, plural rules, and decimal digit extraction. @@ -33,9 +35,12 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { /** Copy constructor. */ DecimalQuantity(const DecimalQuantity &other); + /** Move constructor. */ + DecimalQuantity(DecimalQuantity &&src) U_NOEXCEPT; + DecimalQuantity(); - ~DecimalQuantity(); + ~DecimalQuantity() override; /** * Sets this instance to be equal to another instance. @@ -44,6 +49,9 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { */ DecimalQuantity &operator=(const DecimalQuantity &other); + /** Move assignment */ + DecimalQuantity &operator=(DecimalQuantity&& src) U_NOEXCEPT; + /** * Sets the minimum and maximum integer digits that this {@link DecimalQuantity} should generate. * This method does not perform rounding. @@ -71,7 +79,10 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { * @param mathContext The {@link RoundingMode} to use if rounding is necessary. */ void roundToIncrement(double roundingIncrement, RoundingMode roundingMode, - int32_t minMaxFrac, UErrorCode& status); + int32_t maxFrac, UErrorCode& status); + + /** Removes all fraction digits. */ + void truncate(); /** * Rounds the number to a specified magnitude (power of ten). @@ -89,19 +100,30 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { void roundToInfinity(); /** - * Multiply the internal value. + * Multiply the internal value. Uses decNumber. + * + * @param multiplicand The value by which to multiply. + */ + void multiplyBy(const DecNum& multiplicand, UErrorCode& status); + + /** + * Divide the internal value. Uses decNumber. * * @param multiplicand The value by which to multiply. */ - void multiplyBy(int32_t multiplicand); + void divideBy(const DecNum& divisor, UErrorCode& status); + + /** Flips the sign from positive to negative and back. */ + void negate(); /** * Scales the number by a power of ten. For example, if the value is currently "1234.56", calling * this method with delta=-3 will change the value to "1.23456". * * @param delta The number of magnitudes of ten to change by. + * @return true if integer overflow occured; false otherwise. */ - void adjustMagnitude(int32_t delta); + bool adjustMagnitude(int32_t delta); /** * @return The power of ten corresponding to the most significant nonzero digit. @@ -124,13 +146,23 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { /** @return Whether the value represented by this {@link DecimalQuantity} is not a number. */ bool isNaN() const U_OVERRIDE; - int64_t toLong() const; + /** @param truncateIfOverflow if false and the number does NOT fit, fails with an assertion error. */ + int64_t toLong(bool truncateIfOverflow = false) const; - int64_t toFractionLong(bool includeTrailingZeros) const; + uint64_t toFractionLong(bool includeTrailingZeros) const; + + /** + * Returns whether or not a Long can fully represent the value stored in this DecimalQuantity. + * @param ignoreFraction if true, silently ignore digits after the decimal place. + */ + bool fitsInLong(bool ignoreFraction = false) const; /** @return The value contained in this {@link DecimalQuantity} approximated as a double. */ double toDouble() const; + /** Computes a DecNum representation of this DecimalQuantity, saving it to the output parameter. */ + void toDecNum(DecNum& output, UErrorCode& status) const; + DecimalQuantity &setToInt(int32_t n); DecimalQuantity &setToLong(int64_t n); @@ -138,8 +170,10 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { DecimalQuantity &setToDouble(double n); /** decNumber is similar to BigDecimal in Java. */ + DecimalQuantity &setToDecNumber(StringPiece n, UErrorCode& status); - DecimalQuantity &setToDecNumber(StringPiece n); + /** Internal method if the caller already has a DecNum. */ + DecimalQuantity &setToDecNum(const DecNum& n, UErrorCode& status); /** * Appends a digit, optionally with one or more leading zeros, to the end of the value represented @@ -160,17 +194,10 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { */ void appendDigit(int8_t value, int32_t leadingZeros, bool appendAsInteger); - /** - * Computes the plural form for this number based on the specified set of rules. - * - * @param rules A {@link PluralRules} object representing the set of rules. - * @return The {@link StandardPlural} according to the PluralRules. If the plural form is not in - * the set of standard plurals, {@link StandardPlural#OTHER} is returned instead. - */ - StandardPlural::Form getStandardPlural(const PluralRules *rules) const; - double getPluralOperand(PluralOperand operand) const U_OVERRIDE; + bool hasIntegerValue() const U_OVERRIDE; + /** * Gets the digit at the specified magnitude. For example, if the represented number is 12.3, * getDigit(-1) returns 3, since 3 is the digit corresponding to 10^-1. @@ -223,10 +250,10 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { UnicodeString toString() const; - /* Returns the string in exponential notation. */ - UnicodeString toNumberString() const; + /** Returns the string in standard exponential notation. */ + UnicodeString toScientificString() const; - /* Returns the string without exponential notation. Slightly slower than toNumberString(). */ + /** Returns the string without exponential notation. Slightly slower than toScientificString(). */ UnicodeString toPlainString() const; /** Visible for testing */ @@ -235,6 +262,17 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { /** Visible for testing */ inline bool isExplicitExactDouble() { return explicitExactDouble; }; + bool operator==(const DecimalQuantity& other) const; + + inline bool operator!=(const DecimalQuantity& other) const { + return !(*this == other); + } + + /** + * Bogus flag for when a DecimalQuantity is stored on the stack. + */ + bool bogus = false; + private: /** * The power of ten corresponding to the least significant digit in the BCD. For example, if this @@ -396,12 +434,16 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { */ void readLongToBcd(int64_t n); - void readDecNumberToBcd(decNumber *dn); + void readDecNumberToBcd(const DecNum& dn); void readDoubleConversionToBcd(const char* buffer, int32_t length, int32_t point); + void copyFieldsFrom(const DecimalQuantity& other); + void copyBcdFrom(const DecimalQuantity &other); + void moveBcdFrom(DecimalQuantity& src); + /** * Removes trailing zeros from the BCD (adjusting the scale as required) and then computes the * precision. The precision is the number of digits in the number up through the greatest nonzero @@ -418,12 +460,10 @@ class U_I18N_API DecimalQuantity : public IFixedDecimal, public UMemory { void _setToDoubleFast(double n); - void _setToDecNumber(decNumber *n); + void _setToDecNum(const DecNum& dn, UErrorCode& status); void convertToAccurateDouble(); - double toDoubleFromOriginal() const; - /** Ensure that a byte array of at least 40 digits is allocated. */ void ensureCapacity(); |