211 lines
6.7 KiB
C++
211 lines
6.7 KiB
C++
// Copyright (C) 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) 2010-2014, International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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*
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* File NUMSYS.H
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*
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* Modification History:*
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* Date Name Description
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*
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********************************************************************************
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*/
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#ifndef NUMSYS
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#define NUMSYS
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#include "unicode/utypes.h"
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/**
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* \def NUMSYS_NAME_CAPACITY
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* Size of a numbering system name.
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* @internal
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*/
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#define NUMSYS_NAME_CAPACITY 8
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/**
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* \file
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* \brief C++ API: NumberingSystem object
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*/
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/format.h"
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#include "unicode/uobject.h"
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U_NAMESPACE_BEGIN
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/**
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* Defines numbering systems. A numbering system describes the scheme by which
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* numbers are to be presented to the end user. In its simplest form, a numbering
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* system describes the set of digit characters that are to be used to display
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* numbers, such as Western digits, Thai digits, Arabic-Indic digits, etc., in a
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* positional numbering system with a specified radix (typically 10).
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* More complicated numbering systems are algorithmic in nature, and require use
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* of an RBNF formatter ( rule based number formatter ), in order to calculate
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* the characters to be displayed for a given number. Examples of algorithmic
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* numbering systems include Roman numerals, Chinese numerals, and Hebrew numerals.
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* Formatting rules for many commonly used numbering systems are included in
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* the ICU package, based on the numbering system rules defined in CLDR.
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* Alternate numbering systems can be specified to a locale by using the
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* numbers locale keyword.
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*/
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class U_I18N_API NumberingSystem : public UObject {
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public:
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/**
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* Default Constructor.
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*
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* @stable ICU 4.2
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*/
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NumberingSystem();
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/**
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* Copy constructor.
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* @stable ICU 4.2
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*/
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NumberingSystem(const NumberingSystem& other);
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/**
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* Destructor.
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* @stable ICU 4.2
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*/
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virtual ~NumberingSystem();
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/**
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* Create the default numbering system associated with the specified locale.
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* @param inLocale The given locale.
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* @param status ICU status
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* @stable ICU 4.2
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*/
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static NumberingSystem* U_EXPORT2 createInstance(const Locale & inLocale, UErrorCode& status);
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/**
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* Create the default numbering system associated with the default locale.
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* @stable ICU 4.2
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*/
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static NumberingSystem* U_EXPORT2 createInstance(UErrorCode& status);
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/**
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* Create a numbering system using the specified radix, type, and description.
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* @param radix The radix (base) for this numbering system.
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* @param isAlgorithmic TRUE if the numbering system is algorithmic rather than numeric.
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* @param description The string representing the set of digits used in a numeric system, or the name of the RBNF
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* ruleset to be used in an algorithmic system.
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* @param status ICU status
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* @stable ICU 4.2
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*/
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static NumberingSystem* U_EXPORT2 createInstance(int32_t radix, UBool isAlgorithmic, const UnicodeString& description, UErrorCode& status );
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/**
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* Return a StringEnumeration over all the names of numbering systems known to ICU.
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* @stable ICU 4.2
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*/
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static StringEnumeration * U_EXPORT2 getAvailableNames(UErrorCode& status);
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/**
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* Create a numbering system from one of the predefined numbering systems specified
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* by CLDR and known to ICU, such as "latn", "arabext", or "hanidec"; the full list
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* is returned by unumsys_openAvailableNames. Note that some of the names listed at
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* http://unicode.org/repos/cldr/tags/latest/common/bcp47/number.xml - e.g.
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* default, native, traditional, finance - do not identify specific numbering systems,
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* but rather key values that may only be used as part of a locale, which in turn
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* defines how they are mapped to a specific numbering system such as "latn" or "hant".
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* @param name The name of the numbering system.
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* @param status ICU status
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* @stable ICU 4.2
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*/
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static NumberingSystem* U_EXPORT2 createInstanceByName(const char* name, UErrorCode& status);
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/**
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* Returns the radix of this numbering system. Simple positional numbering systems
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* typically have radix 10, but might have a radix of e.g. 16 for hexadecimal. The
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* radix is less well-defined for non-positional algorithmic systems.
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* @stable ICU 4.2
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*/
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int32_t getRadix() const;
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/**
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* Returns the name of this numbering system if it was created using one of the predefined names
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* known to ICU. Otherwise, returns NULL.
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* The predefined names are identical to the numbering system names as defined by
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* the BCP47 definition in Unicode CLDR.
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* See also, http://www.unicode.org/repos/cldr/tags/latest/common/bcp47/number.xml
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* @stable ICU 4.6
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*/
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const char * getName() const;
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/**
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* Returns the description string of this numbering system. For simple
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* positional systems this is the ordered string of digits (with length matching
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* the radix), e.g. "\u3007\u4E00\u4E8C\u4E09\u56DB\u4E94\u516D\u4E03\u516B\u4E5D"
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* for "hanidec"; it would be "0123456789ABCDEF" for hexadecimal. For
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* algorithmic systems this is the name of the RBNF ruleset used for formatting,
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* e.g. "zh/SpelloutRules/%spellout-cardinal" for "hans" or "%greek-upper" for
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* "grek".
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* @stable ICU 4.2
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*/
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virtual UnicodeString getDescription() const;
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/**
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* Returns TRUE if the given numbering system is algorithmic
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*
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* @return TRUE if the numbering system is algorithmic.
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* Otherwise, return FALSE.
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* @stable ICU 4.2
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*/
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UBool isAlgorithmic() const;
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @stable ICU 4.2
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*
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*/
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static UClassID U_EXPORT2 getStaticClassID(void);
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @stable ICU 4.2
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*/
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virtual UClassID getDynamicClassID() const;
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private:
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UnicodeString desc;
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int32_t radix;
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UBool algorithmic;
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char name[NUMSYS_NAME_CAPACITY+1];
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void setRadix(int32_t radix);
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void setAlgorithmic(UBool algorithmic);
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void setDesc(UnicodeString desc);
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void setName(const char* name);
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static UBool isValidDigitString(const UnicodeString &str);
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UBool hasContiguousDecimalDigits() const;
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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 // _NUMSYS
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//eof
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