Locale represents a specific geographical, political,
* or cultural region. An operation that requires a Locale to perform
* its task is called locale-sensitive and uses the Locale
* 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. In the C APIs, a locales is simply a const char string.
*
*
* You create a Locale with one of the three options listed below.
* Each of the component is separated by '_' in the locale string.
*
** The first option is a valid ISO * Language Code. These codes are the lower-case two-letter * codes as defined by ISO-639. * You can find a full list of these codes at a number of sites, such as: ** \code * newLanguage * * newLanguage + newCountry * * newLanguage + newCountry + newVariant * \endcode **
http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt
*
*
* The second option includes an additonal ISO Country
* Code. 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:
*
* http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html
*
*
* The third option requires another additonal information--the * Variant. * The Variant codes are vendor and browser-specific. * For example, use WIN for Windows, MAC for Macintosh, 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_WIN". * *
* Because a Locale is just an identifier for a region,
* no validity check is performed when you specify a Locale.
* If you want to see whether particular resources are available for the
* Locale you asked for, you must query those resources. For
* example, ask the UNumberFormat for the locales it supports
* using its getAvailable method.
*
Note: 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
* UResourceBundle.
*
*
* The Locale provides a number of convenient constants
* that you can use to specify the commonly used
* locales. For example, the following refers to a locale
* for the United States:
*
** ** \code * ULOC_US * \endcode **
* Once you've specified a locale you can query it for information about
* itself. Use uloc_getCountry to get the ISO Country Code and
* uloc_getLanguage to get the ISO Language Code. You can
* use uloc_getDisplayCountry to get the
* name of the country suitable for displaying to the user. Similarly,
* you can use uloc_getDisplayLanguage to get the name of
* the language suitable for displaying to the user. Interestingly,
* the uloc_getDisplayXXX 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.
*
*
* The ICU provides a number of services that perform locale-sensitive
* operations. For example, the unum_xxx functions format
* numbers, currency, or percentages in a locale-sensitive manner.
*
** Each of these methods has two variants; one with an explicit locale * and one without; the latter using the default locale. ** \code * UErrorCode success = U_ZERO_ERROR; * UNumberFormat *nf; * const char* myLocale = "fr_FR"; * * nf = unum_open( UNUM_DEFAULT, NULL, success ); * unum_close(nf); * nf = unum_open( UNUM_CURRENCY, NULL, success ); * unum_close(nf); * nf = unum_open( UNUM_PERCENT, NULL, success ); * unum_close(nf); * \endcode **
** A* \code * * nf = unum_open( UNUM_DEFAULT, myLocale, success ); * unum_close(nf); * nf = unum_open( UNUM_CURRENCY, myLocale, success ); * unum_close(nf); * nf = unum_open( UNUM_PERCENT, myLocale, success ); * unum_close(nf); * \endcode **
Locale is the mechanism for identifying the kind of services
* (UNumberFormat) that you would like to get. The locale is
* just a mechanism for identifying these services.
*
* * Each international serivce 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: *
*** \code * const char* uloc_getAvailable(int32_t index); * int32_t uloc_countAvailable(); * int32_t * uloc_getDisplayName(const char* localeID, * const char* inLocaleID, * UChar* result, * int32_t maxResultSize, * UErrorCode* err); * * \endcode **
* Concerning POSIX/RFC1766 Locale IDs, * the getLanguage/getCountry/getVariant/getName functions do understand * the POSIX type form of language_COUNTRY.ENCODING@VARIANT * and if there is not an ICU-stype variant, uloc_getVariant() for example * will return the one listed after the @at sign. As well, the hyphen * "-" is recognized as a country/variant separator similarly to RFC1766. * So for example, "en-us" will be interpreted as en_US. * As a result, uloc_getName() is far from a no-op, and will have the * effect of converting POSIX/RFC1766 IDs into ICU form, although it does * NOT map any of the actual codes (i.e. russian->ru) in any way. * Applications should call uloc_getName() at the point where a locale ID * is coming from an external source (user entry, OS, web browser) * and pass the resulting string to other ICU functions. For example, * don't use de-de@EURO as an argument to resourcebundle. */ /* * Useful constants for language. * @stable */ #define ULOC_CHINESE "zh" #define ULOC_ENGLISH "en" #define ULOC_FRENCH "fr" #define ULOC_GERMAN "de" #define ULOC_ITALIAN "it" #define ULOC_JAPANESE "ja" #define ULOC_KOREAN "ko" #define ULOC_SIMPLIFIED_CHINESE "zh_CN" #define ULOC_TRADITIONAL_CHINESE "zh_TW" /* * Useful constants for country/region. * @stable */ #define ULOC_CANADA "en_CA" #define ULOC_CANADA_FRENCH "fr_CA" #define ULOC_CHINA "zh_CN" #define ULOC_PRC "zh_CN" #define ULOC_FRANCE "fr_FR" #define ULOC_GERMANY "de_DE" #define ULOC_ITALY "it_IT" #define ULOC_JAPAN "ja_JP" #define ULOC_KOREA "ko_KR" #define ULOC_TAIWAN "zh_TW" #define ULOC_UK "en_GB" #define ULOC_US "en_US" /** * Useful constants for the size of locale IDs. * @draft */ #define ULOC_LANG_CAPACITY 12 #define ULOC_COUNTRY_CAPACITY 4 #define ULOC_FULLNAME_CAPACITY 50 /** * Constants for *_getLocale() * Allow user to select whether she wants information on * requested, valid or actual locale. * For example, a collator for "en_US_CALIFORNIA" was * requested. In the current state of ICU (2.0), * the requested locale is "en_US_CALIFORNIA", * the valid locale is "en_US" (most specific locale supported by ICU) * and the actual locale is "root" (the collation data comes unmodified * from the UCA) * The locale is considered supported by ICU if there is a core ICU bundle * for that locale (although it may be empty). * @draft ICU 2.1 */ typedef enum { /** This is locale the data actually comes from */ ULOC_ACTUAL_LOCALE = 0, /** This is the most specific locale supported by ICU */ ULOC_VALID_LOCALE = 1, /** This is the requested locale */ ULOC_REQUESTED_LOCALE = 2, ULOC_DATA_LOCALE_TYPE_LIMIT } ULocDataLocaleType ; /** * Gets ICU's default locale. This pointer and/or the contents of the pointer may * become invalid if the uloc_setDefault() is called, so copy the contents of the * pointer before calling uloc_setDefault(). * * @return the ICU default locale * @system * @stable */ U_CAPI const char* U_EXPORT2 uloc_getDefault(void); /** * Sets ICU's default locale. Call this once during setup or program initialization. * * @param localeID the new ICU default locale. A value of NULL will try to get * the system's default locale. * @param status the error information if the setting of default locale fails * @system * @stable */ U_CAPI void U_EXPORT2 uloc_setDefault(const char* localeID, UErrorCode* status); /** * Gets the language code for the specified locale. * * @param localeID the locale to get the ISO langauge code with * @param language the langauge code for localeID * @param languageCapacity the size of the language buffer to store the * language code with * @param err error information if retrieving the language code failed * @return the actual buffer size needed for the langauge code. If it's greater * than languageCapacity, the returned language code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getLanguage(const char* localeID, char* language, int32_t languageCapacity, UErrorCode* err); /** * Gets the country code for the specified locale. * * @param localeID the locale to get the country code with * @param country the country code for localeID * @param languageCapacity the size of the coutry buffer to store the * country code with * @param err error information if retrieving the country code failed * @return the actual buffer size needed for the country code. If it's greater * than countryCapacity, the returned country code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getCountry(const char* localeID, char* country, int32_t countryCapacity, UErrorCode* err); /** * Gets the variant code for the specified locale. * * @param localeID the locale to get the variant code with * @param variant the variant code for localeID * @param variantCapacity the size of the variant buffer to store the * variant code with * @param err error information if retrieving the variant code failed * @return the actual buffer size needed for the variant code. If it's greater * than variantCapacity, the returned variant code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getVariant(const char* localeID, char* variant, int32_t variantCapacity, UErrorCode* err); /** * Gets the full name for the specified locale. * Note: This has the effect of 'canonicalizing' the string to * a certain extent. Upper and lower case are set as needed, * and if the components were in 'POSIX' format they are changed to * ICU format. It does NOT map aliased names in any way. * See the top of this header file. * * @param localeID the locale to get the full name with * @param name the full name for localeID * @param nameCapacity the size of the name buffer to store the * full name with * @param err error information if retrieving the full name failed * @return the actual buffer size needed for the full name. If it's greater * than nameCapacity, the returned full name will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getName(const char* localeID, char* name, int32_t nameCapacity, UErrorCode* err); /** * Gets the ISO language code for the specified locale. * * @param localeID the locale to get the ISO langauge code with * @return language the ISO langauge code for localeID * @stable */ U_CAPI const char* U_EXPORT2 uloc_getISO3Language(const char* localeID); /** * Gets the ISO country code for the specified locale. * * @param localeID the locale to get the ISO country code with * @return country the ISO country code for localeID * @stable */ U_CAPI const char* U_EXPORT2 uloc_getISO3Country(const char* localeID); /** * Gets the Win32 LCID value for the specified locale. * * @param localeID the locale to get the Win32 LCID value with * @return country the Win32 LCID for localeID * @stable */ U_CAPI uint32_t U_EXPORT2 uloc_getLCID(const char* localeID); /** * Gets the language name suitable for display for the specified locale. * * @param localeID the locale to get the ISO langauge code with * @param language the displayable langauge code for localeID * @param languageCapacity the size of the language buffer to store the * displayable language code with * @param err error information if retrieving the displayable language code failed * @return the actual buffer size needed for the displayable langauge code. If it's greater * than languageCapacity, the returned language code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getDisplayLanguage(const char* locale, const char* inLocale, UChar* language, int32_t languageCapacity, UErrorCode* status); /** * Gets the country name suitable for display for the specified locale. * * @param localeID the locale to get the displayable country code with * @param country the displayable country code for localeID * @param languageCapacity the size of the coutry buffer to store the * displayable country code with * @param err error information if retrieving the displayable country code failed * @return the actual buffer size needed for the displayable country code. If it's greater * than countryCapacity, the returned displayable country code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getDisplayCountry(const char* locale, const char* inLocale, UChar* country, int32_t countryCapacity, UErrorCode* status); /* NULL may be used to specify the default */ /** * Gets the variant code suitable for display for the specified locale. * * @param localeID the locale to get the displayable variant code with * @param variant the displayable variant code for localeID * @param variantCapacity the size of the variant buffer to store the * displayable variant code with * @param err error information if retrieving the displayable variant code failed * @return the actual buffer size needed for the displayable variant code. If it's greater * than variantCapacity, the returned displayable variant code will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getDisplayVariant(const char* locale, const char* inLocale, UChar* variant, int32_t variantCapacity, UErrorCode* status); /* NULL may be used to specify the default */ /** * Gets the full name suitable for display for the specified locale. * * @param localeID the locale to get the displayable name with * @param variant the displayable name for localeID * @param variantCapacity the size of the name buffer to store the * displayable full name with * @param err error information if retrieving the displayable name failed * @return the actual buffer size needed for the displayable name. If it's greater * than variantCapacity, the returned displayable name will be truncated. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getDisplayName(const char* localeID, const char* inLocaleID, /* NULL may be used to specify the default */ UChar* result, int32_t maxResultSize, UErrorCode* err); /** * Gets the specified locale from a list of all available locales. * The return value is a pointer to an item of * a locale name array. Both this array and the pointers * it contains are owned by ICU and should not be deleted or written through * by the caller. The locale name is terminated by a null pointer. * @param n the specific locale name index of the available locale list * @return a specified locale name of all available locales * @stable */ U_CAPI const char* U_EXPORT2 uloc_getAvailable(int32_t n); /** * Gets the size of the all available locale list. * * @return the size of the locale list * @stable */ U_CAPI int32_t U_EXPORT2 uloc_countAvailable(void); /** * * Gets a list of all available language codes defined in ISO 639. 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 */ U_CAPI const char* const* U_EXPORT2 uloc_getISOLanguages(void); /** * * Gets a list of all available 2-letter country codes defined in ISO 639. 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 */ U_CAPI const char* const* U_EXPORT2 uloc_getISOCountries(void); /** * Truncate the locale ID string to get the parent locale ID. * Copies the part of the string before the last underscore. * The parent locale ID will be an empty string if there is no * underscore, or if there is only one underscore at localeID[0]. * * @param localeID Input locale ID string. * @param parent Output string buffer for the parent locale ID. * @param parentCapacity Size of the output buffer. * @param err A UErrorCode value. * @return The length of the parent locale ID. * @stable */ U_CAPI int32_t U_EXPORT2 uloc_getParent(const char* localeID, char* parent, int32_t parentCapacity, UErrorCode* err); /*eof*/ #endif /*_ULOC*/