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197 lines
6.9 KiB
197 lines
6.9 KiB
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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********************************************************************************
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* Copyright (C) 2012-2016, International Business Machines
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* Corporation and others. All Rights Reserved.
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********************************************************************************
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*
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* File COMPACTDECIMALFORMAT.H
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********************************************************************************
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*/
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#ifndef __COMPACT_DECIMAL_FORMAT_H__
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#define __COMPACT_DECIMAL_FORMAT_H__
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#include "unicode/utypes.h"
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#if U_SHOW_CPLUSPLUS_API
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/**
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* \file
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* \brief C++ API: Compatibility APIs for compact decimal number formatting.
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*/
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/decimfmt.h"
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struct UHashtable;
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U_NAMESPACE_BEGIN
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class PluralRules;
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/**
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* **IMPORTANT:** New users are strongly encouraged to see if
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* numberformatter.h fits their use case. Although not deprecated, this header
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* is provided for backwards compatibility only.
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*
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* -----------------------------------------------------------------------------
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*
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* The CompactDecimalFormat produces abbreviated numbers, suitable for display in
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* environments will limited real estate. For example, 'Hits: 1.2B' instead of
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* 'Hits: 1,200,000,000'. The format will be appropriate for the given language,
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* such as "1,2 Mrd." for German.
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*
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* For numbers under 1000 trillion (under 10^15, such as 123,456,789,012,345),
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* the result will be short for supported languages. However, the result may
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* sometimes exceed 7 characters, such as when there are combining marks or thin
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* characters. In such cases, the visual width in fonts should still be short.
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*
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* By default, there are 3 significant digits. After creation, if more than
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* three significant digits are set (with setMaximumSignificantDigits), or if a
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* fixed number of digits are set (with setMaximumIntegerDigits or
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* setMaximumFractionDigits), then result may be wider.
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*
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* At this time, parsing is not supported, and will produce a U_UNSUPPORTED_ERROR.
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* Resetting the pattern prefixes or suffixes is not supported; the method calls
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* are ignored.
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*
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* @stable ICU 51
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*/
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class U_I18N_API CompactDecimalFormat : public DecimalFormat {
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public:
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/**
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* Returns a compact decimal instance for specified locale.
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*
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* **NOTE:** New users are strongly encouraged to use
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* `number::NumberFormatter` instead of NumberFormat.
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* @param inLocale the given locale.
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* @param style whether to use short or long style.
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* @param status error code returned here.
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* @stable ICU 51
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*/
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static CompactDecimalFormat* U_EXPORT2 createInstance(
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const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status);
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/**
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* Copy constructor.
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*
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* @param source the DecimalFormat object to be copied from.
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* @stable ICU 51
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*/
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CompactDecimalFormat(const CompactDecimalFormat& source);
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/**
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* Destructor.
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* @stable ICU 51
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*/
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~CompactDecimalFormat() U_OVERRIDE;
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/**
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* Assignment operator.
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*
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* @param rhs the DecimalFormat object to be copied.
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* @stable ICU 51
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*/
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CompactDecimalFormat& operator=(const CompactDecimalFormat& rhs);
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/**
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* Clone this Format object polymorphically. The caller owns the
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* result and should delete it when done.
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*
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* @return a polymorphic copy of this CompactDecimalFormat.
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* @stable ICU 51
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*/
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CompactDecimalFormat* clone() const U_OVERRIDE;
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using DecimalFormat::format;
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/**
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* CompactDecimalFormat does not support parsing. This implementation
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* does nothing.
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* @param text Unused.
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* @param result Does not change.
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* @param parsePosition Does not change.
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* @see Formattable
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* @stable ICU 51
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*/
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void parse(const UnicodeString& text, Formattable& result,
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ParsePosition& parsePosition) const U_OVERRIDE;
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/**
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* CompactDecimalFormat does not support parsing. This implementation
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* sets status to U_UNSUPPORTED_ERROR
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*
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* @param text Unused.
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* @param result Does not change.
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* @param status Always set to U_UNSUPPORTED_ERROR.
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* @stable ICU 51
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*/
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void parse(const UnicodeString& text, Formattable& result, UErrorCode& status) const U_OVERRIDE;
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#ifndef U_HIDE_INTERNAL_API
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/**
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* Parses text from the given string as a currency amount. Unlike
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* the parse() method, this method will attempt to parse a generic
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* currency name, searching for a match of this object's locale's
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* currency display names, or for a 3-letter ISO currency code.
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* This method will fail if this format is not a currency format,
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* that is, if it does not contain the currency pattern symbol
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* (U+00A4) in its prefix or suffix. This implementation always returns
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* NULL.
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*
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* @param text the string to parse
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* @param pos input-output position; on input, the position within text
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* to match; must have 0 <= pos.getIndex() < text.length();
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* on output, the position after the last matched character.
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* If the parse fails, the position in unchanged upon output.
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* @return if parse succeeds, a pointer to a newly-created CurrencyAmount
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* object (owned by the caller) containing information about
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* the parsed currency; if parse fails, this is NULL.
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* @internal
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*/
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CurrencyAmount* parseCurrency(const UnicodeString& text, ParsePosition& pos) const U_OVERRIDE;
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#endif /* U_HIDE_INTERNAL_API */
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/**
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* Return the class ID for this class. This is useful only for
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* comparing to a return value from getDynamicClassID(). For example:
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* <pre>
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* . Base* polymorphic_pointer = createPolymorphicObject();
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* . if (polymorphic_pointer->getDynamicClassID() ==
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* . Derived::getStaticClassID()) ...
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* </pre>
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* @return The class ID for all objects of this class.
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* @stable ICU 51
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*/
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static UClassID U_EXPORT2 getStaticClassID();
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/**
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* Returns a unique class ID POLYMORPHICALLY. Pure virtual override.
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* This method is to implement a simple version of RTTI, since not all
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* C++ compilers support genuine RTTI. Polymorphic operator==() and
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* clone() methods call this method.
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*
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* @return The class ID for this object. All objects of a
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* given class have the same class ID. Objects of
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* other classes have different class IDs.
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* @stable ICU 51
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*/
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UClassID getDynamicClassID() const U_OVERRIDE;
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private:
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CompactDecimalFormat(const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status);
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};
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_FORMATTING */
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#endif /* U_SHOW_CPLUSPLUS_API */
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#endif // __COMPACT_DECIMAL_FORMAT_H__
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//eof
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