locid.h

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// © 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 "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"

U_NAMESPACE_BEGIN

// Forward Declarations
void U_CALLCONV locale_available_init(); 
class StringEnumeration;
class UnicodeString;

class U_COMMON_API Locale : public UObject {
public:
    static const Locale& U_EXPORT2 getRoot();
    static const Locale& U_EXPORT2 getEnglish();
    static const Locale& U_EXPORT2 getFrench();
    static const Locale& U_EXPORT2 getGerman();
    static const Locale& U_EXPORT2 getItalian();
    static const Locale& U_EXPORT2 getJapanese();
    static const Locale& U_EXPORT2 getKorean();
    static const Locale& U_EXPORT2 getChinese();
    static const Locale& U_EXPORT2 getSimplifiedChinese();
    static const Locale& U_EXPORT2 getTraditionalChinese();

    static const Locale& U_EXPORT2 getFrance();
    static const Locale& U_EXPORT2 getGermany();
    static const Locale& U_EXPORT2 getItaly();
    static const Locale& U_EXPORT2 getJapan();
    static const Locale& U_EXPORT2 getKorea();
    static const Locale& U_EXPORT2 getChina();
    static const Locale& U_EXPORT2 getPRC();
    static const Locale& U_EXPORT2 getTaiwan();
    static const Locale& U_EXPORT2 getUK();
    static const Locale& U_EXPORT2 getUS();
    static const Locale& U_EXPORT2 getCanada();
    static const Locale& U_EXPORT2 getCanadaFrench();

    Locale();

    Locale(const char* language,
           const char* country = nullptr,
           const char* variant = nullptr,
           const char* keywordsAndValues = nullptr);

    Locale(const    Locale& other);

    Locale(Locale&& other) noexcept;

    virtual ~Locale() ;

    Locale& operator=(const Locale& other);

    Locale& operator=(Locale&& other) noexcept;

    bool    operator==(const    Locale&     other) const;

    inline bool    operator!=(const    Locale&     other) const;

    Locale *clone() const;

#ifndef U_HIDE_SYSTEM_API

    static const Locale& U_EXPORT2 getDefault();

    static void U_EXPORT2 setDefault(const Locale& newLocale,
                                     UErrorCode&   success);
#endif  /* U_HIDE_SYSTEM_API */

    static Locale U_EXPORT2 forLanguageTag(StringPiece tag, UErrorCode& status);

    void toLanguageTag(ByteSink& sink, UErrorCode& status) const;

    template<typename StringClass>
    inline StringClass toLanguageTag(UErrorCode& status) const;

    static Locale U_EXPORT2 createFromName(const char *name);

    static Locale U_EXPORT2 createCanonical(const char* name);

    inline const char *  getLanguage( ) const;

    inline const char *  getScript( ) const;

    inline const char *  getCountry( ) const;

    inline const char *  getVariant( ) const;

    inline const char * getName() const;

    const char * getBaseName() const;

    void addLikelySubtags(UErrorCode& status);

    void minimizeSubtags(UErrorCode& status);

    void canonicalize(UErrorCode& status);

    StringEnumeration * createKeywords(UErrorCode &status) const;

    StringEnumeration * createUnicodeKeywords(UErrorCode &status) const;

    template<typename StringClass, typename OutputIterator>
    inline void getKeywords(OutputIterator iterator, UErrorCode& status) const;

    template<typename StringClass, typename OutputIterator>
    inline void getUnicodeKeywords(OutputIterator iterator, UErrorCode& status) const;

    int32_t getKeywordValue(const char* keywordName, char *buffer, int32_t bufferCapacity, UErrorCode &status) const;

    void getKeywordValue(StringPiece keywordName, ByteSink& sink, UErrorCode& status) const;

    template<typename StringClass>
    inline StringClass getKeywordValue(StringPiece keywordName, UErrorCode& status) const;

    void getUnicodeKeywordValue(StringPiece keywordName, ByteSink& sink, UErrorCode& status) const;

    template<typename StringClass>
    inline StringClass getUnicodeKeywordValue(StringPiece keywordName, UErrorCode& status) const;

    void setKeywordValue(const char* keywordName, const char* keywordValue, UErrorCode &status);

    void setKeywordValue(StringPiece keywordName, StringPiece keywordValue, UErrorCode& status);

    void setUnicodeKeywordValue(StringPiece keywordName, StringPiece keywordValue, UErrorCode& status);

    const char * getISO3Language() const;

    const char * getISO3Country() const;

    uint32_t getLCID() const;

    UBool isRightToLeft() const;

    UnicodeString&  getDisplayLanguage(UnicodeString&   dispLang) const;

    UnicodeString&  getDisplayLanguage( const   Locale&         displayLocale,
                                                UnicodeString&  dispLang) const;

    UnicodeString&  getDisplayScript(          UnicodeString& dispScript) const;

    UnicodeString&  getDisplayScript(  const   Locale&         displayLocale,
                                               UnicodeString&  dispScript) const;

    UnicodeString&  getDisplayCountry(          UnicodeString& dispCountry) const;

    UnicodeString&  getDisplayCountry(  const   Locale&         displayLocale,
                                                UnicodeString&  dispCountry) const;

    UnicodeString&  getDisplayVariant(      UnicodeString& dispVar) const;

    UnicodeString&  getDisplayVariant(  const   Locale&         displayLocale,
                                                UnicodeString&  dispVar) const;

    UnicodeString&  getDisplayName(         UnicodeString&  name) const;

    UnicodeString&  getDisplayName( const   Locale&         displayLocale,
                                            UnicodeString&  name) const;

    int32_t hashCode() const;

    void setToBogus();

    inline UBool isBogus() const;

    static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);

    static const char* const* U_EXPORT2 getISOCountries();

    static const char* const* U_EXPORT2 getISOLanguages();

    static UClassID U_EXPORT2 getStaticClassID();

    virtual UClassID getDynamicClassID() const override;

    class U_COMMON_API Iterator /* not : public UObject because this is an interface/mixin class */ {
    public:
        virtual ~Iterator();

        virtual UBool hasNext() const = 0;

        virtual const Locale &next() = 0;
    };

    template<typename Iter>
    class RangeIterator : public Iterator, public UMemory {
    public:
        RangeIterator(Iter begin, Iter end) : it_(begin), end_(end) {}

        UBool hasNext() const override { return it_ != end_; }

        const Locale &next() override { return *it_++; }

    private:
        Iter it_;
        const Iter end_;
    };

    template<typename Iter, typename Conv>
    class ConvertingIterator : public Iterator, public UMemory {
    public:
        ConvertingIterator(Iter begin, Iter end, Conv converter) :
                it_(begin), end_(end), converter_(converter) {}

        UBool hasNext() const override { return it_ != end_; }

        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

    void setFromPOSIXID(const char *posixID);
    void minimizeSubtags(bool favorScript, UErrorCode& status);
#endif  /* U_HIDE_INTERNAL_API */

private:
    Locale& init(const char* cLocaleID, 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 {
        eBOGUS
    };
    Locale(ELocaleType);

    static Locale* getLocaleCache();

    char language[ULOC_LANG_CAPACITY];
    char script[ULOC_SCRIPT_CAPACITY];
    char country[ULOC_COUNTRY_CAPACITY];
    int32_t variantBegin;
    char* fullName;
    char fullNameBuffer[ULOC_FULLNAME_CAPACITY];
    // name without keywords
    char* baseName;
    void initBaseName(UErrorCode& status);

    UBool fIsBogus;

    static const Locale &getLocale(int locid);

    friend Locale *locale_set_default_internal(const char *, UErrorCode& status);

    friend void U_CALLCONV locale_available_init();
};

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;
}

inline const char *
Locale::getCountry() const
{
    return country;
}

inline const char *
Locale::getLanguage() const
{
    return language;
}

inline const char *
Locale::getScript() const
{
    return script;
}

inline const char *
Locale::getVariant() const
{
    return fIsBogus ? "" : &baseName[variantBegin];
}

inline const char *
Locale::getName() const
{
    return fullName;
}

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;
}

inline UBool
Locale::isBogus() const {
    return fIsBogus;
}

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif