// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * Copyright (C) 2010-2014, International Business Machines Corporation and * others. All Rights Reserved. ******************************************************************************* * * * File NUMSYS.H * * Modification History:* * Date Name Description * ******************************************************************************** */ #ifndef NUMSYS #define NUMSYS #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API /** * \file * \brief C++ API: NumberingSystem object */ #if !UCONFIG_NO_FORMATTING #include "unicode/format.h" #include "unicode/uobject.h" U_NAMESPACE_BEGIN // can't be #ifndef U_HIDE_INTERNAL_API; needed for char[] field size /** * Size of a numbering system name. * @internal */ constexpr const size_t kInternalNumSysNameCapacity = 8; /** * Defines numbering systems. A numbering system describes the scheme by which * numbers are to be presented to the end user. In its simplest form, a numbering * system describes the set of digit characters that are to be used to display * numbers, such as Western digits, Thai digits, Arabic-Indic digits, etc., in a * positional numbering system with a specified radix (typically 10). * More complicated numbering systems are algorithmic in nature, and require use * of an RBNF formatter ( rule based number formatter ), in order to calculate * the characters to be displayed for a given number. Examples of algorithmic * numbering systems include Roman numerals, Chinese numerals, and Hebrew numerals. * Formatting rules for many commonly used numbering systems are included in * the ICU package, based on the numbering system rules defined in CLDR. * Alternate numbering systems can be specified to a locale by using the * numbers locale keyword. */ class U_I18N_API NumberingSystem : public UObject { public: /** * Default Constructor. * * @stable ICU 4.2 */ NumberingSystem(); /** * Copy constructor. * @stable ICU 4.2 */ NumberingSystem(const NumberingSystem& other); /** * Copy assignment. * @stable ICU 4.2 */ NumberingSystem& operator=(const NumberingSystem& other) = default; /** * Destructor. * @stable ICU 4.2 */ virtual ~NumberingSystem(); /** * Create the default numbering system associated with the specified locale. * @param inLocale The given locale. * @param status ICU status * @stable ICU 4.2 */ static NumberingSystem* U_EXPORT2 createInstance(const Locale & inLocale, UErrorCode& status); /** * Create the default numbering system associated with the default locale. * @stable ICU 4.2 */ static NumberingSystem* U_EXPORT2 createInstance(UErrorCode& status); /** * Create a numbering system using the specified radix, type, and description. * @param radix The radix (base) for this numbering system. * @param isAlgorithmic true if the numbering system is algorithmic rather than numeric. * @param description The string representing the set of digits used in a numeric system, or the name of the RBNF * ruleset to be used in an algorithmic system. * @param status ICU status * @stable ICU 4.2 */ static NumberingSystem* U_EXPORT2 createInstance(int32_t radix, UBool isAlgorithmic, const UnicodeString& description, UErrorCode& status ); /** * Return a StringEnumeration over all the names of numbering systems known to ICU. * The numbering system names will be in alphabetical (invariant) order. * * The returned StringEnumeration is owned by the caller, who must delete it when * finished with it. * * @stable ICU 4.2 */ static StringEnumeration * U_EXPORT2 getAvailableNames(UErrorCode& status); /** * Create a numbering system from one of the predefined numbering systems specified * by CLDR and known to ICU, such as "latn", "arabext", or "hanidec"; the full list * is returned by unumsys_openAvailableNames. Note that some of the names listed at * http://unicode.org/repos/cldr/tags/latest/common/bcp47/number.xml - e.g. * default, native, traditional, finance - do not identify specific numbering systems, * but rather key values that may only be used as part of a locale, which in turn * defines how they are mapped to a specific numbering system such as "latn" or "hant". * * @param name The name of the numbering system. * @param status ICU status; set to U_UNSUPPORTED_ERROR if numbering system not found. * @return The NumberingSystem instance, or nullptr if not found. * @stable ICU 4.2 */ static NumberingSystem* U_EXPORT2 createInstanceByName(const char* name, UErrorCode& status); /** * Returns the radix of this numbering system. Simple positional numbering systems * typically have radix 10, but might have a radix of e.g. 16 for hexadecimal. The * radix is less well-defined for non-positional algorithmic systems. * @stable ICU 4.2 */ int32_t getRadix() const; /** * Returns the name of this numbering system if it was created using one of the predefined names * known to ICU. Otherwise, returns NULL. * The predefined names are identical to the numbering system names as defined by * the BCP47 definition in Unicode CLDR. * See also, http://www.unicode.org/repos/cldr/tags/latest/common/bcp47/number.xml * @stable ICU 4.6 */ const char * getName() const; /** * Returns the description string of this numbering system. For simple * positional systems this is the ordered string of digits (with length matching * the radix), e.g. "\u3007\u4E00\u4E8C\u4E09\u56DB\u4E94\u516D\u4E03\u516B\u4E5D" * for "hanidec"; it would be "0123456789ABCDEF" for hexadecimal. For * algorithmic systems this is the name of the RBNF ruleset used for formatting, * e.g. "zh/SpelloutRules/%spellout-cardinal" for "hans" or "%greek-upper" for * "grek". * @stable ICU 4.2 */ virtual UnicodeString getDescription() const; /** * Returns true if the given numbering system is algorithmic * * @return true if the numbering system is algorithmic. * Otherwise, return false. * @stable ICU 4.2 */ UBool isAlgorithmic() const; /** * ICU "poor man's RTTI", returns a UClassID for this class. * * @stable ICU 4.2 * */ static UClassID U_EXPORT2 getStaticClassID(void); /** * ICU "poor man's RTTI", returns a UClassID for the actual class. * * @stable ICU 4.2 */ virtual UClassID getDynamicClassID() const override; private: UnicodeString desc; int32_t radix; UBool algorithmic; char name[kInternalNumSysNameCapacity+1]; void setRadix(int32_t radix); void setAlgorithmic(UBool algorithmic); void setDesc(const UnicodeString &desc); void setName(const char* name); static UBool isValidDigitString(const UnicodeString &str); UBool hasContiguousDecimalDigits() const; }; U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif /* U_SHOW_CPLUSPLUS_API */ #endif // _NUMSYS //eof