Quellcode-Bibliothek locid.h
Sprache: C
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright ( C ) 1996 - 2015 , International Business Machines
* Corporation and others . All Rights Reserved .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* File locid . h
*
* Created by : Helena Shih
*
* Modification History :
*
* Date Name Description
* 02 / 11 / 97 aliu Changed gLocPath to fgLocPath and added methods to
* get and set it .
* 04 / 02 / 97 aliu Made operator ! = inline ; fixed return value of getName ( ) .
* 04 / 15 / 97 aliu Cleanup for AIX / Win32 .
* 04 / 24 / 97 aliu Numerous changes per code review .
* 08 / 18 / 98 stephen Added tokenizeString ( ) , changed getDisplayName ( )
* 09 / 08 / 98 stephen Moved definition of kEmptyString for Mac Port
* 11 / 09 / 99 weiv Added const char * getName ( ) const ;
* 04 / 12 / 00 srl removing unicodestring api ' s and cached hash code
* 08 / 10 / 01 grhoten Change the static Locales to accessor functions
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
#ifndef LOCID_H
#define LOCID_H
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
#include <cstdint>
#include <string_view>
#include "unicode/bytestream.h"
#include "unicode/localpointer.h"
#include "unicode/strenum.h"
#include "unicode/stringpiece.h"
#include "unicode/uobject.h"
#include "unicode/putil.h"
#include "unicode/uloc.h"
/**
* \ file
* \ brief C + + API : Locale ID object .
*/
U_NAMESPACE_BEGIN
// Forward Declarations
void U_CALLCONV locale_available_init();
/**< @internal */
class StringEnumeration;
class UnicodeString;
/**
* A < code > Locale < / code > object represents a specific geographical , political ,
* or cultural region . An operation that requires a < code > Locale < / code > to perform
* its task is called < em > locale - sensitive < / em > and uses the < code > Locale < / code >
* to tailor information for the user . For example , displaying a number
* is a locale - sensitive operation - - the number should be formatted
* according to the customs / conventions of the user ' s native country ,
* region , or culture .
*
* The Locale class is not suitable for subclassing .
*
* < P >
* You can create a < code > Locale < / code > object using the constructor in
* this class :
* \ htmlonly < blockquote > \ endhtmlonly
* < pre >
* Locale ( const char * language ,
* const char * country ,
* const char * variant ) ;
* < / pre >
* \ htmlonly < / blockquote > \ endhtmlonly
* The first argument to the constructors is a valid < STRONG > ISO
* Language Code . < / STRONG > These codes are the lower - case two - letter
* codes as defined by ISO - 639 .
* You can find a full list of these codes at :
* < BR > < a href = " http : //www.loc.gov/standards/iso639-2/">
* http : //www.loc.gov/standards/iso639-2/</a>
*
* < P >
* The second argument to the constructors is a valid < STRONG > ISO Country
* Code . < / STRONG > These codes are the upper - case two - letter codes
* as defined by ISO - 3166 .
* You can find a full list of these codes at a number of sites , such as :
* < BR > < a href = " http : //www.iso.org/iso/en/prods-services/iso3166ma/index.html">
* http : //www.iso.org/iso/en/prods-services/iso3166ma/index.html</a>
*
* < P >
* The third constructor requires a third argument - - the < STRONG > Variant . < / STRONG >
* The Variant codes are vendor and browser - specific .
* For example , use REVISED for a language ' s revised script orthography , and POSIX for POSIX .
* Where there are two variants , separate them with an underscore , and
* put the most important one first . For
* example , a Traditional Spanish collation might be referenced , with
* " ES " , " ES " , " Traditional_POSIX " .
*
* < P >
* Because a < code > Locale < / code > object is just an identifier for a region ,
* no validity check is performed when you construct a < code > Locale < / code > .
* If you want to see whether particular resources are available for the
* < code > Locale < / code > you construct , you must query those resources . For
* example , ask the < code > NumberFormat < / code > for the locales it supports
* using its < code > getAvailableLocales < / code > method .
* < BR > < STRONG > Note : < / STRONG > When you ask for a resource for a particular
* locale , you get back the best available match , not necessarily
* precisely what you asked for . For more information , look at
* < code > ResourceBundle < / code > .
*
* < P >
* The < code > Locale < / code > class provides a number of convenient constants
* that you can use to create < code > Locale < / code > objects for commonly used
* locales . For example , the following refers to a < code > Locale < / code > object
* for the United States :
* \ htmlonly < blockquote > \ endhtmlonly
* < pre >
* Locale : : getUS ( )
* < / pre >
* \ htmlonly < / blockquote > \ endhtmlonly
*
* < P >
* Once you ' ve created a < code > Locale < / code > you can query it for information about
* itself . Use < code > getCountry < / code > to get the ISO Country Code and
* < code > getLanguage < / code > to get the ISO Language Code . You can
* use < code > getDisplayCountry < / code > to get the
* name of the country suitable for displaying to the user . Similarly ,
* you can use < code > getDisplayLanguage < / code > to get the name of
* the language suitable for displaying to the user . Interestingly ,
* the < code > getDisplayXXX < / code > methods are themselves locale - sensitive
* and have two versions : one that uses the default locale and one
* that takes a locale as an argument and displays the name or country in
* a language appropriate to that locale .
*
* < P >
* ICU provides a number of classes that perform locale - sensitive
* operations . For example , the < code > NumberFormat < / code > class formats
* numbers , currency , or percentages in a locale - sensitive manner . Classes
* such as < code > NumberFormat < / code > have a number of convenience methods
* for creating a default object of that type . For example , the
* < code > NumberFormat < / code > class provides these three convenience methods
* for creating a default < code > NumberFormat < / code > object :
* \ htmlonly < blockquote > \ endhtmlonly
* < pre >
* UErrorCode success = U_ZERO_ERROR ;
* Locale myLocale ;
* NumberFormat * nf ;
*
* nf = NumberFormat : : createInstance ( success ) ; delete nf ;
* nf = NumberFormat : : createCurrencyInstance ( success ) ; delete nf ;
* nf = NumberFormat : : createPercentInstance ( success ) ; delete nf ;
* < / pre >
* \ htmlonly < / blockquote > \ endhtmlonly
* Each of these methods has two variants ; one with an explicit locale
* and one without ; the latter using the default locale .
* \ htmlonly < blockquote > \ endhtmlonly
* < pre >
* nf = NumberFormat : : createInstance ( myLocale , success ) ; delete nf ;
* nf = NumberFormat : : createCurrencyInstance ( myLocale , success ) ; delete nf ;
* nf = NumberFormat : : createPercentInstance ( myLocale , success ) ; delete nf ;
* < / pre >
* \ htmlonly < / blockquote > \ endhtmlonly
* A < code > Locale < / code > is the mechanism for identifying the kind of object
* ( < code > NumberFormat < / code > ) that you would like to get . The locale is
* < STRONG > just < / STRONG > a mechanism for identifying objects ,
* < STRONG > not < / STRONG > a container for the objects themselves .
*
* < P >
* Each class that performs locale - sensitive operations allows you
* to get all the available objects of that type . You can sift
* through these objects by language , country , or variant ,
* and use the display names to present a menu to the user .
* For example , you can create a menu of all the collation objects
* suitable for a given language . Such classes implement these
* three class methods :
* \ htmlonly < blockquote > \ endhtmlonly
* < pre >
* static Locale * getAvailableLocales ( int32_t & numLocales )
* static UnicodeString & getDisplayName ( const Locale & objectLocale ,
* const Locale & displayLocale ,
* UnicodeString & displayName )
* static UnicodeString & getDisplayName ( const Locale & objectLocale ,
* UnicodeString & displayName )
* < / pre >
* \ htmlonly < / blockquote > \ endhtmlonly
*
* @ stable ICU 2 . 0
* @ see ResourceBundle
*/
class U_COMMON_API_CLASS Locale :
public UObject {
public :
/** Useful constant for the Root locale. @stable ICU 4.4 */
U_COMMON_API
static const Locale& U_EXPORT2 getRoot();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getEnglish();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getFrench();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getGerman();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getItalian();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getJapanese();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getKorean();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getChinese();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getSimplifiedChinese();
/** Useful constant for this language. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getTraditionalChinese();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getFrance();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getGermany();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getItaly();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getJapan();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getKorea();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getChina();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getPRC();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getTaiwan();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getUK();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getUS();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getCanada();
/** Useful constant for this country/region. @stable ICU 2.0 */
U_COMMON_API
static const Locale& U_EXPORT2 getCanadaFrench();
/**
* Construct a default locale object , a Locale for the default locale ID .
*
* @ see getDefault
* @ see uloc_getDefault
* @ stable ICU 2 . 0
*/
U_COMMON_API Locale();
/**
* Construct a locale from language , country , variant .
* If an error occurs , then the constructed object will be " bogus "
* ( isBogus ( ) will return true ) .
*
* @ param language Lowercase two - letter or three - letter ISO - 639 code .
* This parameter can instead be an ICU style C locale ( e . g . " en_US " ) ,
* but the other parameters must not be used .
* This parameter can be nullptr ; if so ,
* the locale is initialized to match the current default locale .
* ( This is the same as using the default constructor . )
* Please note : The Java Locale class does NOT accept the form
* ' new Locale ( " en_US " ) ' but only ' new Locale ( " en " , " US " ) '
*
* @ param country Uppercase two - letter ISO - 3166 code . ( optional )
* @ param variant Uppercase vendor and browser specific code . See class
* description . ( optional )
* @ param keywordsAndValues A string consisting of keyword / values pairs , such as
* " collation = phonebook ; currency = euro "
*
* @ see getDefault
* @ see uloc_getDefault
* @ stable ICU 2 . 0
*/
U_COMMON_API Locale(
const char* language,
const char* country = nullptr,
const char* variant = nullptr,
const char* keywordsAndValues = nullptr);
/**
* Initializes a Locale object from another Locale object .
*
* @ param other The Locale object being copied in .
* @ stable ICU 2 . 0
*/
U_COMMON_API Locale(
const Locale& other);
/**
* Move constructor ; might leave source in bogus state .
* This locale will have the same contents that the source locale had .
*
* @ param other The Locale object being moved in .
* @ stable ICU 63
*/
U_COMMON_API Locale(Locale&& other) noexcept;
/**
* Destructor
* @ stable ICU 2 . 0
*/
U_COMMON_API
virtual ~Locale();
/**
* Replaces the entire contents of * this with the specified value .
*
* @ param other The Locale object being copied in .
* @ return * this
* @ stable ICU 2 . 0
*/
U_COMMON_API Locale&
operator =(
const Locale& other);
/**
* Move assignment operator ; might leave source in bogus state .
* This locale will have the same contents that the source locale had .
* The behavior is undefined if * this and the source are the same object .
*
* @ param other The Locale object being moved in .
* @ return * this
* @ stable ICU 63
*/
U_COMMON_API Locale&
operator =(Locale&& other) noexcept;
/**
* Checks if two locale keys are the same .
*
* @ param other The locale key object to be compared with this .
* @ return true if the two locale keys are the same , false otherwise .
* @ stable ICU 2 . 0
*/
U_COMMON_API
bool operator ==(
const Locale& other)
const ;
/**
* Checks if two locale keys are not the same .
*
* @ param other The locale key object to be compared with this .
* @ return true if the two locale keys are not the same , false
* otherwise .
* @ stable ICU 2 . 0
*/
U_COMMON_API inline
bool operator !=(
const Locale& other)
const ;
/**
* Clone this object .
* Clones can be used concurrently in multiple threads .
* If an error occurs , then nullptr is returned .
* The caller must delete the clone .
*
* @ return a clone of this object
*
* @ see getDynamicClassID
* @ stable ICU 2 . 8
*/
U_COMMON_API Locale* clone()
const ;
#ifndef U_HIDE_SYSTEM_API
/**
* Common methods of getting the current default Locale . Used for the
* presentation : menus , dialogs , etc . Generally set once when your applet or
* application is initialized , then never reset . ( If you do reset the
* default locale , you probably want to reload your GUI , so that the change
* is reflected in your interface . )
*
* More advanced programs will allow users to use different locales for
* different fields , e . g . in a spreadsheet .
*
* Note that the initial setting will match the host system .
* @ return a reference to the Locale object for the default locale ID
* @ system
* @ stable ICU 2 . 0
*/
U_COMMON_API
static const Locale& U_EXPORT2 getDefault();
/**
* Sets the default . Normally set once at the beginning of a process ,
* then never reset .
* setDefault ( ) only changes ICU ' s default locale ID , < strong > not < / strong >
* the default locale ID of the runtime environment .
*
* @ param newLocale Locale to set to . If nullptr , set to the value obtained
* from the runtime environment .
* @ param success The error code .
* @ system
* @ stable ICU 2 . 0
*/
U_COMMON_API
static void U_EXPORT2 setDefault(
const Locale& newLocale, UErrorCode&&nb
sp;success);
#endif /* U_HIDE_SYSTEM_API */
/**
* Returns a Locale for the specified BCP47 language tag string .
* If the specified language tag contains any ill - formed subtags ,
* the first such subtag and all following subtags are ignored .
* < p >
* This implements the ' Language - Tag ' production of BCP 47 , and so
* supports legacy language tags ( marked as “ Type : grandfathered ” in BCP 47 )
* ( regular and irregular ) as well as private use language tags .
*
* Private use tags are represented as ' x - whatever ' ,
* and legacy tags are converted to their canonical replacements where they exist .
*
* Note that a few legacy tags have no modern replacement ;
* these will be converted using the fallback described in
* the first paragraph , so some information might be lost .
*
* @ param tag the input BCP47 language tag .
* @ param status error information if creating the Locale failed .
* @ return the Locale for the specified BCP47 language tag .
* @ stable ICU 63
*/
U_COMMON_API static Locale U_EXPORT2 forLanguageTag(StringPiece tag, UErrorCode& status);
/**
* Returns a well - formed language tag for this Locale .
* < p >
* < b > Note < / b > : Any locale fields which do not satisfy the BCP47 syntax
* requirement will be silently omitted from the result .
*
* If this function fails , partial output may have been written to the sink .
*
* @ param sink the output sink receiving the BCP47 language
* tag for this Locale .
* @ param status error information if creating the language tag failed .
* @ stable ICU 63
*/
U_COMMON_API void toLanguageTag(ByteSink& sink, UErrorCode& status) const ;
/**
* Returns a well - formed language tag for this Locale .
* < p >
* < b > Note < / b > : Any locale fields which do not satisfy the BCP47 syntax
* requirement will be silently omitted from the result .
*
* @ param status error information if creating the language tag failed .
* @ return the BCP47 language tag for this Locale .
* @ stable ICU 63
*/
template <typename StringClass>
inline StringClass toLanguageTag(UErrorCode& status) const ;
/**
* Creates a locale which has had minimal canonicalization
* as per uloc_getName ( ) .
* @ param name The name to create from . If name is null ,
* the default Locale is used .
* @ return new locale object
* @ stable ICU 2 . 0
* @ see uloc_getName
*/
U_COMMON_API static Locale U_EXPORT2 createFromName(const char* name);
#ifndef U_HIDE_INTERNAL_API
/** @internal */
U_COMMON_API static Locale U_EXPORT2 createFromName(StringPiece name);
#endif /* U_HIDE_INTERNAL_API */
/**
* Creates a locale from the given string after canonicalizing
* the string according to CLDR by calling uloc_canonicalize ( ) .
* @ param name the locale ID to create from . Must not be nullptr .
* @ return a new locale object corresponding to the given name
* @ stable ICU 3 . 0
* @ see uloc_canonicalize
*/
U_COMMON_API static Locale U_EXPORT2 createCanonical(const char* name);
/**
* Returns the locale ' s ISO - 639 language code .
* @ return An alias to the code
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getLanguage() const ;
/**
* Returns the locale ' s ISO - 15924 abbreviation script code .
* @ return An alias to the code
* @ see uscript_getShortName
* @ see uscript_getCode
* @ stable ICU 2 . 8
*/
U_COMMON_API const char* getScript() const ;
/**
* Returns the locale ' s ISO - 3166 country code .
* @ return An alias to the code
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getCountry() const ;
/**
* Returns the locale ' s variant code .
* @ return An alias to the code
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getVariant() const ;
/**
* Returns the programmatic name of the entire locale , with the language ,
* country and variant separated by underbars . If a field is missing , up
* to two leading underbars will occur . Example : " en " , " de_DE " , " en_US_WIN " ,
* " de__POSIX " , " fr__MAC " , " _ _ MAC " , " _ MT " , " _ FR_EURO "
* @ return A pointer to " name " .
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getName() const ;
/**
* Returns the programmatic name of the entire locale as getName ( ) would return ,
* but without keywords .
* @ return A pointer to " name " .
* @ see getName
* @ stable ICU 2 . 8
*/
U_COMMON_API const char* getBaseName() const ;
/**
* Add the likely subtags for this Locale , per the algorithm described
* in the following CLDR technical report :
*
* http : //www.unicode.org/reports/tr35/#Likely_Subtags
*
* If this Locale is already in the maximal form , or not valid , or there is
* no data available for maximization , the Locale will be unchanged .
*
* For example , " sh " cannot be maximized , since there is no
* reasonable maximization .
*
* Examples :
*
* " und_Zzzz " maximizes to " en_Latn_US "
*
* " en " maximizes to " en_Latn_US "
*
* " de " maximizes to " de_Latn_DE "
*
* " sr " maximizes to " sr_Cyrl_RS "
*
* " zh_Hani " maximizes to " zh_Hani_CN "
*
* @ param status error information if maximizing this Locale failed .
* If this Locale is not well - formed , the error code is
* U_ILLEGAL_ARGUMENT_ERROR .
* @ stable ICU 63
*/
U_COMMON_API void addLikelySubtags(UErrorCode& status);
/**
* Minimize the subtags for this Locale , per the algorithm described
* in the following CLDR technical report :
*
* http : //www.unicode.org/reports/tr35/#Likely_Subtags
*
* If this Locale is already in the minimal form , or not valid , or there is
* no data available for minimization , the Locale will be unchanged .
*
* Since the minimization algorithm relies on proper maximization , see the
* comments for addLikelySubtags for reasons why there might not be any
* data .
*
* Examples :
*
* " en_Latn_US " minimizes to " en "
*
* " de_Latn_US " minimizes to " de "
*
* " sr_Cyrl_RS " minimizes to " sr "
*
* " zh_Hant_TW " minimizes to " zh_TW " ( The region is preferred to the
* script , and minimizing to " zh " would imply " zh_Hans_CN " . )
*
* @ param status error information if maximizing this Locale failed .
* If this Locale is not well - formed , the error code is
* U_ILLEGAL_ARGUMENT_ERROR .
* @ stable ICU 63
*/
U_COMMON_API void minimizeSubtags(UErrorCode& status);
/**
* Canonicalize the locale ID of this object according to CLDR .
* @ param status the status code
* @ stable ICU 67
* @ see createCanonical
*/
U_COMMON_API void canonicalize(UErrorCode& status);
/**
* Gets the list of keywords for the specified locale .
*
* @ param status the status code
* @ return pointer to StringEnumeration class , or nullptr if there are no keywords .
* Client must dispose of it by calling delete .
* @ see getKeywords
* @ stable ICU 2 . 8
*/
U_COMMON_API StringEnumeration* createKeywords(UErrorCode& status) const ;
/**
* Gets the list of Unicode keywords for the specified locale .
*
* @ param status the status code
* @ return pointer to StringEnumeration class , or nullptr if there are no keywords .
* Client must dispose of it by calling delete .
* @ see getUnicodeKeywords
* @ stable ICU 63
*/
U_COMMON_API StringEnumeration* createUnicodeKeywords(UErrorCode& status) const ;
/**
* Gets the set of keywords for this Locale .
*
* A wrapper to call createKeywords ( ) and write the resulting
* keywords as standard strings ( or compatible objects ) into any kind of
* container that can be written to by an STL style output iterator .
*
* @ param iterator an STL style output iterator to write the keywords to .
* @ param status error information if creating set of keywords failed .
* @ stable ICU 63
*/
template <typename StringClass, typename OutputIterator>
inline void getKeywords(OutputIterator iterator, UErrorCode& status) const ;
/**
* Gets the set of Unicode keywords for this Locale .
*
* A wrapper to call createUnicodeKeywords ( ) and write the resulting
* keywords as standard strings ( or compatible objects ) into any kind of
* container that can be written to by an STL style output iterator .
*
* @ param iterator an STL style output iterator to write the keywords to .
* @ param status error information if creating set of keywords failed .
* @ stable ICU 63
*/
template <typename StringClass, typename OutputIterator>
inline void getUnicodeKeywords(OutputIterator iterator, UErrorCode& status) const ;
/**
* Gets the value for a keyword .
*
* This uses legacy keyword = value pairs , like " collation = phonebook " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword for which we want the value . Case insensitive .
* @ param buffer The buffer to receive the keyword value .
* @ param bufferCapacity The capacity of receiving buffer
* @ param status Returns any error information while performing this operation .
* @ return the length of the keyword value
*
* @ stable ICU 2 . 8
*/
U_COMMON_API int32_t getKeywordValue(const char* keywordName,
char* buffer,
int32_t bufferCapacity,
UErrorCode& status) const ;
/**
* Gets the value for a keyword .
*
* This uses legacy keyword = value pairs , like " collation = phonebook " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword for which we want the value .
* @ param sink the sink to receive the keyword value .
* @ param status error information if getting the value failed .
* @ stable ICU 63
*/
U_COMMON_API void getKeywordValue(StringPiece keywordName, ByteSink& sink, UErrorCode& status) const ;
/**
* Gets the value for a keyword .
*
* This uses legacy keyword = value pairs , like " collation = phonebook " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword for which we want the value .
* @ param status error information if getting the value failed .
* @ return the keyword value .
* @ stable ICU 63
*/
template <typename StringClass>
inline StringClass getKeywordValue(StringPiece keywordName, UErrorCode& status) const ;
/**
* Gets the Unicode value for a Unicode keyword .
*
* This uses Unicode key - value pairs , like " co - phonebk " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword for which we want the value .
* @ param sink the sink to receive the keyword value .
* @ param status error information if getting the value failed .
* @ stable ICU 63
*/
U_COMMON_API void getUnicodeKeywordValue(StringPiece keywordName,
ByteSink& sink,
UErrorCode& status) const ;
/**
* Gets the Unicode value for a Unicode keyword .
*
* This uses Unicode key - value pairs , like " co - phonebk " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword for which we want the value .
* @ param status error information if getting the value failed .
* @ return the keyword value .
* @ stable ICU 63
*/
template <typename StringClass>
inline StringClass getUnicodeKeywordValue(StringPiece keywordName, UErrorCode& status) const ;
/**
* Sets or removes the value for a keyword .
*
* For removing all keywords , use getBaseName ( ) ,
* and construct a new Locale if it differs from getName ( ) .
*
* This uses legacy keyword = value pairs , like " collation = phonebook " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword to be set . Case insensitive .
* @ param keywordValue value of the keyword to be set . If 0 - length or
* nullptr , will result in the keyword being removed . No error is given if
* that keyword does not exist .
* @ param status Returns any error information while performing this operation .
*
* @ stable ICU 49
*/
U_COMMON_API void setKeywordValue(const char* keywordName,
const char* keywordValue,
UErrorCode& status) {
setKeywordValue(StringPiece{keywordName}, StringPiece{keywordValue}, status);
}
/**
* Sets or removes the value for a keyword .
*
* For removing all keywords , use getBaseName ( ) ,
* and construct a new Locale if it differs from getName ( ) .
*
* This uses legacy keyword = value pairs , like " collation = phonebook " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword to be set .
* @ param keywordValue value of the keyword to be set . If 0 - length or
* nullptr , will result in the keyword being removed . No error is given if
* that keyword does not exist .
* @ param status Returns any error information while performing this operation .
* @ stable ICU 63
* /
U_COMMON_API void setKeywordValue ( StringPiece keywordName ,
StringPiece keywordValue ,
UErrorCode & status ) ;
/**
* Sets or removes the Unicode value for a Unicode keyword .
*
* For removing all keywords , use getBaseName ( ) ,
* and construct a new Locale if it differs from getName ( ) .
*
* This uses Unicode key - value pairs , like " co - phonebk " .
*
* ICU4C doesn ' t do automatic conversion between legacy and Unicode
* keywords and values in getters and setters ( as opposed to ICU4J ) .
*
* @ param keywordName name of the keyword to be set .
* @ param keywordValue value of the keyword to be set . If 0 - length or
* nullptr , will result in the keyword being removed . No error is given if
* that keyword does not exist .
* @ param status Returns any error information while performing this operation .
* @ stable ICU 63
*/
U_COMMON_API void setUnicodeKeywordValue(StringPiece keywordName,
StringPiece keywordValue,
UErrorCode& status);
/**
* returns the locale ' s three - letter language code , as specified
* in ISO draft standard ISO - 639 - 2 .
* @ return An alias to the code , or an empty string
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getISO3Language() const ;
/**
* Fills in " name " with the locale ' s three - letter ISO - 3166 country code .
* @ return An alias to the code , or an empty string
* @ stable ICU 2 . 0
*/
U_COMMON_API const char* getISO3Country() const ;
/**
* Returns the Windows LCID value corresponding to this locale .
* This value is stored in the resource data for the locale as a one - to - four - digit
* hexadecimal number . If the resource is missing , in the wrong format , or
* there is no Windows LCID value that corresponds to this locale , returns 0 .
* @ stable ICU 2 . 0
*/
U_COMMON_API uint32_t getLCID() const ;
/**
* Returns whether this locale ' s script is written right - to - left .
* If there is no script subtag , then the likely script is used , see uloc_addLikelySubtags ( ) .
* If no likely script is known , then false is returned .
*
* A script is right - to - left according to the CLDR script metadata
* which corresponds to whether the script ' s letters have Bidi_Class = R or AL .
*
* Returns true for " ar " and " en - Hebr " , false for " zh " and " fa - Cyrl " .
*
* @ return true if the locale ' s script is written right - to - left
* @ stable ICU 54
*/
U_COMMON_API UBool isRightToLeft() const ;
/**
* Fills in " dispLang " with the name of this locale ' s language in a format suitable for
* user display in the default locale . For example , if the locale ' s language code is
* " fr " and the default locale ' s language code is " en " , this function would set
* dispLang to " French " .
* @ param dispLang Receives the language ' s display name .
* @ return A reference to " dispLang " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayLanguage(UnicodeString& dispLang) const ;
/**
* Fills in " dispLang " with the name of this locale ' s language in a format suitable for
* user display in the locale specified by " displayLocale " . For example , if the locale ' s
* language code is " en " and displayLocale ' s language code is " fr " , this function would set
* dispLang to " Anglais " .
* @ param displayLocale Specifies the locale to be used to display the name . In other words ,
* if the locale ' s language code is " en " , passing Locale : : getFrench ( ) for
* displayLocale would result in " Anglais " , while passing Locale : : getGerman ( )
* for displayLocale would result in " Englisch " .
* @ param dispLang Receives the language ' s display name .
* @ return A reference to " dispLang " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayLanguage(const Locale& displayLocale,
UnicodeString& dispLang) const ;
/**
* Fills in " dispScript " with the name of this locale ' s script in a format suitable
* for user display in the default locale . For example , if the locale ' s script code
* is " LATN " and the default locale ' s language code is " en " , this function would set
* dispScript to " Latin " .
* @ param dispScript Receives the scripts ' s display name .
* @ return A reference to " dispScript " .
* @ stable ICU 2 . 8
*/
U_COMMON_API UnicodeString& getDisplayScript(UnicodeString& dispScript) const ;
/**
* Fills in " dispScript " with the name of this locale ' s country in a format suitable
* for user display in the locale specified by " displayLocale " . For example , if the locale ' s
* script code is " LATN " and displayLocale ' s language code is " en " , this function would set
* dispScript to " Latin " .
* @ param displayLocale Specifies the locale to be used to display the name . In other
* words , if the locale ' s script code is " LATN " , passing
* Locale : : getFrench ( ) for displayLocale would result in " " , while
* passing Locale : : getGerman ( ) for displayLocale would result in
* " " .
* @ param dispScript Receives the scripts ' s display name .
* @ return A reference to " dispScript " .
* @ stable ICU 2 . 8
*/
U_COMMON_API UnicodeString& getDisplayScript(const Locale& displayLocale,
UnicodeString& dispScript) const ;
/**
* Fills in " dispCountry " with the name of this locale ' s country in a format suitable
* for user display in the default locale . For example , if the locale ' s country code
* is " FR " and the default locale ' s language code is " en " , this function would set
* dispCountry to " France " .
* @ param dispCountry Receives the country ' s display name .
* @ return A reference to " dispCountry " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayCountry(UnicodeString& dispCountry) const ;
/**
* Fills in " dispCountry " with the name of this locale ' s country in a format suitable
* for user display in the locale specified by " displayLocale " . For example , if the locale ' s
* country code is " US " and displayLocale ' s language code is " fr " , this function would set
* dispCountry to " & Eacute ; tats - Unis " .
* @ param displayLocale Specifies the locale to be used to display the name . In other
* words , if the locale ' s country code is " US " , passing
* Locale : : getFrench ( ) for displayLocale would result in " & Eacute ; tats - Unis " , while
* passing Locale : : getGerman ( ) for displayLocale would result in
* " Vereinigte Staaten " .
* @ param dispCountry Receives the country ' s display name .
* @ return A reference to " dispCountry " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayCountry(const Locale& displayLocale,
UnicodeString& dispCountry) const ;
/**
* Fills in " dispVar " with the name of this locale ' s variant code in a format suitable
* for user display in the default locale .
* @ param dispVar Receives the variant ' s name .
* @ return A reference to " dispVar " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayVariant(UnicodeString& dispVar) const ;
/**
* Fills in " dispVar " with the name of this locale ' s variant code in a format
* suitable for user display in the locale specified by " displayLocale " .
* @ param displayLocale Specifies the locale to be used to display the name .
* @ param dispVar Receives the variant ' s display name .
* @ return A reference to " dispVar " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayVariant(const Locale& displayLocale,
UnicodeString& dispVar) const ;
/**
* Fills in " name " with the name of this locale in a format suitable for user display
* in the default locale . This function uses getDisplayLanguage ( ) , getDisplayCountry ( ) ,
* and getDisplayVariant ( ) to do its work , and outputs the display name in the format
* " language ( country [ , variant ] ) " . For example , if the default locale is en_US , then
* fr_FR ' s display name would be " French ( France ) " , and es_MX_Traditional ' s display name
* would be " Spanish ( Mexico , Traditional ) " .
* @ param name Receives the locale ' s display name .
* @ return A reference to " name " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayName(UnicodeString& name) const ;
/**
* Fills in " name " with the name of this locale in a format suitable for user display
* in the locale specified by " displayLocale " . This function uses getDisplayLanguage ( ) ,
* getDisplayCountry ( ) , and getDisplayVariant ( ) to do its work , and outputs the display
* name in the format " language ( country [ , variant ] ) " . For example , if displayLocale is
* fr_FR , then en_US ' s display name would be " Anglais ( & Eacute ; tats - Unis ) " , and no_NO_NY ' s
* display name would be " norv & eacute ; gien ( Norv & egrave ; ge , NY ) " .
* @ param displayLocale Specifies the locale to be used to display the name .
* @ param name Receives the locale ' s display name .
* @ return A reference to " name " .
* @ stable ICU 2 . 0
*/
U_COMMON_API UnicodeString& getDisplayName(const Locale& displayLocale, UnicodeString& name) const ;
/**
* Generates a hash code for the locale .
* @ stable ICU 2 . 0
*/
U_COMMON_API int32_t hashCode() const ;
/**
* Sets the locale to bogus
* A bogus locale represents a non - existing locale associated
* with services that can be instantiated from non - locale data
* in addition to locale ( for example , collation can be
* instantiated from a locale and from a rule set ) .
* @ stable ICU 2 . 1
*/
U_COMMON_API void setToBogus();
/**
* Gets the bogus state . Locale object can be bogus if it doesn ' t exist
* @ return false if it is a real locale , true if it is a bogus locale
* @ stable ICU 2 . 1
*/
U_COMMON_API inline UBool isBogus() const ;
/**
* Returns a list of all installed locales .
* @ param count Receives the number of locales in the list .
* @ return A pointer to an array of Locale objects . This array is the list
* of all locales with installed resource files . The called does NOT
* get ownership of this list , and must NOT delete it .
* @ stable ICU 2 . 0
*/
U_COMMON_API static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
/**
* Gets a list of all available 2 - letter country codes defined in ISO 3166 . This is a
* pointer to an array of pointers to arrays of char . All of these pointers are
* owned by ICU - - do not delete them , and do not write through them . The array is
* terminated with a null pointer .
* @ return a list of all available country codes
* @ stable ICU 2 . 0
*/
U_COMMON_API static const char* const * U_EXPORT2 getISOCountries();
/**
* Returns a list of all unique language codes defined in ISO 639 .
* They can be 2 or 3 letter codes , as defined by
* < a href = " https : //www.ietf.org/rfc/bcp/bcp47.html#section-2.2.1">
* BCP 47 , section 2 . 2 . 1 < / a > . This is a pointer
* to an array of pointers to arrays of char . All of these pointers are owned
* by ICU - - do not delete them , and do not write through them . The array is
* terminated with a null pointer .
* @ return a list of all available language codes
* @ stable ICU 2 . 0
*/
U_COMMON_API static const char* const * U_EXPORT2 getISOLanguages();
/**
* ICU " poor man ' s RTTI " , returns a UClassID for this class .
*
* @ stable ICU 2 . 2
*/
U_COMMON_API static UClassID U_EXPORT2 getStaticClassID();
/**
* ICU " poor man ' s RTTI " , returns a UClassID for the actual class .
*
* @ stable ICU 2 . 2
*/
U_COMMON_API virtual UClassID getDynamicClassID() const override;
/**
* A Locale iterator interface similar to a Java Iterator < Locale > .
* @ stable ICU 65
*/
class U_COMMON_API Iterator /* not : public UObject because this is an interface/mixin class */ {
public :
/** @stable ICU 65 */
virtual ~Iterator();
/**
* @ return true if next ( ) can be called again .
* @ stable ICU 65
*/
virtual UBool hasNext() const = 0 ;
/**
* @ return the next locale .
* @ stable ICU 65
*/
virtual const Locale &next() = 0 ;
};
/**
* A generic Locale iterator implementation over Locale input iterators .
* @ stable ICU 65
*/
template <typename Iter>
class RangeIterator : public Iterator, public UMemory {
public :
/**
* Constructs an iterator from a begin / end range .
* Each of the iterator parameter values must be an
* input iterator whose value is convertible to const Locale & .
*
* @ param begin Start of range .
* @ param end Exclusive end of range .
* @ stable ICU 65
*/
RangeIterator(Iter begin, Iter end) : it_(begin), end_(end) {}
/**
* @ return true if next ( ) can be called again .
* @ stable ICU 65
*/
UBool hasNext() const override { return it_ != end_; }
/**
* @ return the next locale .
* @ stable ICU 65
*/
const Locale &next() override { return *it_++; }
private :
Iter it_;
const Iter end_;
};
/**
* A generic Locale iterator implementation over Locale input iterators .
* Calls the converter to convert each * begin to a const Locale & .
* @ stable ICU 65
*/
template <typename Iter, typename Conv>
class ConvertingIterator : public Iterator, public UMemory {
public :
/**
* Constructs an iterator from a begin / end range .
* Each of the iterator parameter values must be an
* input iterator whose value the converter converts to const Locale & .
*
* @ param begin Start of range .
* @ param end Exclusive end of range .
* @ param converter Converter from * begin to const Locale & or compatible .
* @ stable ICU 65
*/
ConvertingIterator(Iter begin, Iter end, Conv converter) :
it_(begin), end_(end), converter_(converter) {}
/**
* @ return true if next ( ) can be called again .
* @ stable ICU 65
*/
UBool hasNext() const override { return it_ != end_; }
/**
* @ return the next locale .
* @ stable ICU 65
*/
const Locale &next() override { return converter_(*it_++); }
private :
Iter it_;
const Iter end_;
Conv converter_;
};
protected : /* only protected for testing purposes. DO NOT USE. */
#ifndef U_HIDE_INTERNAL_API
/**
* Set this from a single POSIX style locale string .
* @ internal
*/
U_COMMON_API void setFromPOSIXID(const char* posixID);
/**
* Minimize the subtags for this Locale , per the algorithm described
* @ param favorScript favor to keep script if true , to keep region if false .
* @ param status error information if maximizing this Locale failed .
* If this Locale is not well - formed , the error code is
* U_ILLEGAL_ARGUMENT_ERROR .
* @ internal
*/
U_COMMON_API void minimizeSubtags(bool favorScript, UErrorCode& status);
#endif /* U_HIDE_INTERNAL_API */
private :
/**
* Initialize the locale object with a new name .
* Was deprecated - used in implementation - moved internal
*
* @ param cLocaleID The new locale name .
* @ param canonicalize whether to call uloc_canonicalize on cLocaleID
*/
Locale& init(const char* localeID, UBool canonicalize);
Locale& init(StringPiece localeID, UBool canonicalize);
/*
* Internal constructor to allow construction of a locale object with
* NO side effects . ( Default constructor tries to get
* the default locale . )
*/
enum ELocaleType : uint8_t {
eBOGUS,
eNEST,
eHEAP,
};
Locale(ELocaleType);
/**
* Initialize the locale cache for commonly used locales
*/
static Locale* getLocaleCache();
union Payload;
struct Nest;
struct Heap;
/**
* Locale data that can be nested directly within the union Payload object .
*/
struct Nest {
static constexpr size_t SIZE = 32 ;
ELocaleType type = eNEST;
char language[4 ];
char script[5 ];
char region[4 ];
uint8_t variantBegin;
char baseName[SIZE -
sizeof type -
sizeof language -
sizeof script -
sizeof region -
sizeof variantBegin];
const char* getLanguage() const { return language; }
const char* getScript() const { return script; }
const char* getRegion() const { return region; }
const char* getVariant() const { return variantBegin == 0 ? "" : getBaseName() + variantBegin; }
const char* getBaseName() const { return baseName; }
// Doesn't inherit from UMemory, shouldn't be heap allocated.
static void * U_EXPORT2 operator new(size_t) noexcept = delete ;
static void * U_EXPORT2 operator new[](size_t) noexcept = delete ;
Nest() : language{'\0' }, script{'\0' }, region{'\0' }, variantBegin{0 }, baseName{'\0' } {}
void init(std::string_view language,
std::string_view script,
std::string_view region,
uint8_t variantBegin);
static bool fits(int32_t length,
std::string_view language,
std::string_view script,
std::string_view region) {
return length < static_cast <int32_t>(sizeof Nest::baseName) &&
language.size() < sizeof Nest::language &&
script.size() < sizeof Nest::script &&
region.size() < sizeof Nest::region;
}
private :
friend union Payload;
Nest(Heap&& heap, uint8_t variantBegin);
};
static_assert(sizeof (Nest) == Nest::SIZE);
/**
* Locale data that needs to be heap allocated in the union Payload object .
*/
struct Heap {
struct Alloc;
ELocaleType type;
char language[ULOC_LANG_CAPACITY];
char script[ULOC_SCRIPT_CAPACITY];
char region[ULOC_COUNTRY_CAPACITY];
Alloc* ptr;
const char* getLanguage() const { return language; }
const char* getScript() const { return script; }
const char* getRegion() const { return region; }
const char* getVariant() const ;
const char* getFullName() const ;
const char* getBaseName() const ;
// Doesn't inherit from UMemory, shouldn't be heap allocated.
static void * U_EXPORT2 operator new(size_t) noexcept = delete ;
static void * U_EXPORT2 operator new[](size_t) noexcept = delete ;
Heap(std::string_view language,
std::string_view script,
std::string_view region,
int32_t variantBegin);
~Heap();
Heap& operator =(const Heap& other);
Heap& operator =(Heap&& other) noexcept;
};
static_assert(sizeof (Heap) <= sizeof (Nest));
/**
* This is kind of std : : variant but customized to not waste any space on the
* discriminator or on any padding , and to copy any heap allocated object .
*/
union Payload {
private :
Nest nest;
Heap heap;
ELocaleType type;
void copy(const Payload& other);
void move(Payload&& other) noexcept;
public :
// Doesn't inherit from UMemory, shouldn't be heap allocated.
static void * U_EXPORT2 operator new(size_t) noexcept = delete ;
static void * U_EXPORT2 operator new[](size_t) noexcept = delete ;
Payload() : type{eBOGUS} {}
~Payload();
Payload(const Payload& other);
Payload(Payload&& other) noexcept;
Payload& operator =(const Payload& other);
Payload& operator =(Payload&& other) noexcept;
void setToBogus();
bool isBogus() const { return type == eBOGUS; }
template <typename T, typename ... Args> T& emplace(Args&&... args);
template <typename T> T* get();
template <typename BogusFn, typename NestFn, typename HeapFn, typename ... Args>
auto visit(BogusFn bogusFn, NestFn nestFn, HeapFn heapFn, Args... args) const ;
} payload;
/**
* Call a field getter function on either Nest or Heap in payload .
* ( This is kind of std : : visit but simpler and without exceptions . )
*
* @ tparam NEST Pointer to the Nest getter function .
* @ tparam HEAP Pointer to the Heap getter function .
* @ return the result from the getter , or the empty string if isBogus ( ) .
*/
template <const char* (Nest::*const NEST)() const ,
const char* (Heap::*const HEAP)() const >
const char* getField() const ;
static const Locale &getLocale(int locid);
/**
* A friend to allow the default locale to be set by either the C or C + + API .
*/
friend Locale *locale_set_default_internal(const char *, UErrorCode& status);
/**
*/
friend void U_CALLCONV locale_available_init();
};
U_COMMON_API inline bool
Locale::operator !=(const Locale& other) const
{
return !operator ==(other);
}
template <typename StringClass> inline StringClass
Locale::toLanguageTag(UErrorCode& status) const
{
if (U_FAILURE(status)) { return {}; }
StringClass result;
StringByteSink<StringClass> sink(&result);
toLanguageTag(sink, status);
return result;
}
template <typename StringClass, typename OutputIterator> inline void
Locale::getKeywords(OutputIterator iterator, UErrorCode& status) const
{
if (U_FAILURE(status)) { return ; }
LocalPointer<StringEnumeration> keys(createKeywords(status));
if (U_FAILURE(status) || keys.isNull()) {
return ;
}
for (;;) {
int32_t resultLength;
const char* buffer = keys->next(&resultLength, status);
if (U_FAILURE(status) || buffer == nullptr) {
return ;
}
*iterator++ = StringClass(buffer, resultLength);
}
}
template <typename StringClass, typename OutputIterator> inline void
Locale::getUnicodeKeywords(OutputIterator iterator, UErrorCode& status) const
{
if (U_FAILURE(status)) { return ; }
LocalPointer<StringEnumeration> keys(createUnicodeKeywords(status));
if (U_FAILURE(status) || keys.isNull()) {
return ;
}
for (;;) {
int32_t resultLength;
const char* buffer = keys->next(&resultLength, status);
if (U_FAILURE(status) || buffer == nullptr) {
return ;
}
*iterator++ = StringClass(buffer, resultLength);
}
}
template <typename StringClass> inline StringClass
Locale::getKeywordValue(StringPiece keywordName, UErrorCode& status) const
{
if (U_FAILURE(status)) { return {}; }
StringClass result;
StringByteSink<StringClass> sink(&result);
getKeywordValue(keywordName, sink, status);
return result;
}
template <typename StringClass> inline StringClass
Locale::getUnicodeKeywordValue(StringPiece keywordName, UErrorCode& status) const
{
if (U_FAILURE(status)) { return {}; }
StringClass result;
StringByteSink<StringClass> sink(&result);
getUnicodeKeywordValue(keywordName, sink, status);
return result;
}
U_COMMON_API inline UBool
Locale::isBogus() const {
return payload.isBogus();
}
U_NAMESPACE_END
#endif /* U_SHOW_CPLUSPLUS_API */
#endif
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