uloc.h

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                       const char* displayLocale,
                       UChar* variant,
                       int32_t variantCapacity,
                       UErrorCode* status);

/**
 * Gets the keyword name suitable for display for the specified locale.
 * E.g: for the locale string de_DE\@collation=PHONEBOOK, this API gets the display 
 * string for the keyword collation. 
 * Usage:
 * <code>
 *    UErrorCode status = U_ZERO_ERROR;
 *    const char* keyword =NULL;
 *    int32_t keywordLen = 0;
 *    int32_t keywordCount = 0;
 *    UChar displayKeyword[256];
 *    int32_t displayKeywordLen = 0;
 *    UEnumeration* keywordEnum = uloc_openKeywords("de_DE@collation=PHONEBOOK;calendar=TRADITIONAL", &status);
 *    for(keywordCount = uenum_count(keywordEnum, &status); keywordCount > 0 ; keywordCount--){
 *          if(U_FAILURE(status)){
 *              ...something went wrong so handle the error...
 *              break;
 *          }
 *          // the uenum_next returns NUL terminated string
 *          keyword = uenum_next(keywordEnum, &keywordLen, &status);
 *          displayKeywordLen = uloc_getDisplayKeyword(keyword, "en_US", displayKeyword, 256);
 *          ... do something interesting .....
 *    }
 *    uenum_close(keywordEnum);
 * </code>
 * @param keyword           The keyword whose display string needs to be returned.
 * @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
 *                          inLocale would result in "Anglais", while passing Locale::getGerman()
 *                          for inLocale would result in "Englisch". NULL may be used to specify the default.
 * @param dest              the buffer to which the displayable keyword should be written.
 * @param destCapacity      The size of the buffer (number of UChars). If it is 0, then
 *                          dest may be NULL and the function will only return the length of the 
 *                          result without writing any of the result string (pre-flighting).
 * @param status            error information if retrieving the displayable string failed. 
 *                          Should not be NULL and should not indicate failure on entry.
 * @return the actual buffer size needed for the displayable variant code.  
 * @see #uloc_openKeywords
 * @draft ICU 2.8
 */
U_DRAFT int32_t U_EXPORT2
uloc_getDisplayKeyword(const char* keyword,
                       const char* displayLocale,
                       UChar* dest,
                       int32_t destCapacity,
                       UErrorCode* status);
/**
 * Gets the value of the keyword suitable for display for the specified locale.
 * E.g: for the locale string de_DE\@collation=PHONEBOOK, this API gets the display 
 * string for PHONEBOOK, in the display locale, when "collation" is specified as the keyword.
 *
 * @param locale            The locale to get the displayable variant code with. NULL may be used to specify the default.
 * @param keyword           The keyword for whose value should be used.
 * @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
 *                          inLocale would result in "Anglais", while passing Locale::getGerman()
 *                          for inLocale would result in "Englisch". NULL may be used to specify the default.
 * @param dest              the buffer to which the displayable keyword should be written.
 * @param destCapacity      The size of the buffer (number of UChars). If it is 0, then
 *                          dest may be NULL and the function will only return the length of the 
 *                          result without writing any of the result string (pre-flighting).
 * @param status            error information if retrieving the displayable string failed. 
 *                          Should not be NULL and must not indicate failure on entry.
 * @return the actual buffer size needed for the displayable variant code.  
 * @draft ICU 2.8
 */
U_DRAFT int32_t U_EXPORT2
uloc_getDisplayKeywordValue(   const char* locale,
                               const char* keyword,
                               const char* displayLocale,
                               UChar* dest,
                               int32_t destCapacity,
                               UErrorCode* status);
/**
 * Gets the full name suitable for display for the specified locale.
 *
 * @param localeID the locale to get the displayable name with. NULL may be used to specify the default.
 * @param inLocaleID 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
 *                   inLocale would result in "Anglais", while passing Locale::getGerman()
 *                   for inLocale would result in "Englisch". NULL may be used to specify the default.
 * @param result the displayable name for localeID
 * @param maxResultSize 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 maxResultSize, the returned displayable name will be truncated.  
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
uloc_getDisplayName(const char* localeID,
            const char* inLocaleID,
            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 ICU 2.0
 */
U_STABLE 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 ICU 2.0
 */
U_STABLE 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 ICU 2.0
 */
U_STABLE 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 ICU 2.0
 */
U_STABLE 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 ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
uloc_getParent(const char*    localeID,
                 char* parent,
                 int32_t parentCapacity,
                 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.
 * This API strips off the keyword part, so "de_DE\@collation=phonebook" 
 * will become "de_DE". 
 * This API supports preflighting.
 *
 * @param localeID the locale to get the full name with
 * @param name fill in buffer for the name without keywords.
 * @param nameCapacity capacity of the fill in buffer.
 * @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.  
 * @draft ICU 2.8
 */
U_DRAFT int32_t U_EXPORT2
uloc_getBaseName(const char*    localeID,
         char* name,
         int32_t nameCapacity,
         UErrorCode* err);

/**
 * Gets an enumeration of keywords for the specified locale. Enumeration
 * must get disposed of by the client using uenum_close function.
 *
 * @param localeID the locale to get the variant code with
 * @param status error information if retrieving the keywords failed
 * @return enumeration of keywords or NULL if there are no keywords.
 * @draft ICU 2.8
 */
U_DRAFT UEnumeration* U_EXPORT2
uloc_openKeywords(const char* localeID,
                        UErrorCode* status);

/**
 * Get the value for a keyword. Locale name does not need to be normalized.
 * 
 * @param localeID locale name containing the keyword ("de_DE@currency=EURO;collation=PHONEBOOK")
 * @param keywordName name of the keyword for which we want the value. Case insensitive.
 * @param buffer receiving buffer
 * @param bufferCapacity capacity of receiving buffer
 * @param status containing error code - buffer not big enough.
 * @return the length of keyword value
 * @draft ICU 2.8
 */
U_DRAFT int32_t U_EXPORT2
uloc_getKeywordValue(const char* localeID,
                     const char* keywordName,
                     char* buffer, int32_t bufferCapacity,
                     UErrorCode* status);


/**
 * Set the value of the specified keyword.
 * NOTE: Unlike almost every other ICU function which takes a
 * buffer, this function will NOT truncate the output text. If a
 * BUFFER_OVERFLOW_ERROR is received, it means that the original
 * buffer is untouched. This is done to prevent incorrect or possibly
 * even malformed locales from being generated and used.
 * 
 * @param keywordName name of the keyword to be set. Case insensitive.
 * @param keywordValue value of the keyword to be set. If 0-length or
 *  NULL, will result in the keyword being removed. No error is given if 
 *  that keyword does not exist.
 * @param buffer input buffer containing locale to be modified.
 * @param bufferCapacity capacity of receiving buffer
 * @param status containing error code - buffer not big enough.
 * @return the length needed for the buffer
 * @see uloc_getKeywordValue
 * @draft ICU 3.2
 */
U_DRAFT int32_t U_EXPORT2
uloc_setKeywordValue(const char* keywordName,
                     const char* keywordValue,
                     char* buffer, int32_t bufferCapacity,
                     UErrorCode* status);

/**
 * enums for the 'outResult' parameter return value
 * @see uloc_acceptLanguageFromHTTP
 * @see uloc_acceptLanguage
 * @draft ICU 3.2
 */
typedef enum {
  ULOC_ACCEPT_FAILED   = 0,  /* No exact match was found. */
  ULOC_ACCEPT_VALID    = 1,  /* An exact match was found. */
  ULOC_ACCEPT_FALLBACK = 2   /* A fallback was found, for example, 
                                Accept list contained 'ja_JP'
                                which matched available locale 'ja'. */
} UAcceptResult;


/**
 * @param httpAcceptLanguage - "Accept-Language:" header as per HTTP.
 * @param result - buffer to accept the result locale
 * @param resultAvailable the size of the result buffer.
 * @param availableLocales - list of available locales to match
 * @param status Error status, may be BUFFER_OVERFLOW_ERROR
 * @return length needed for the locale.
 * @draft ICU 3.2
 */
U_DRAFT int32_t U_EXPORT2
uloc_acceptLanguageFromHTTP(char *result, int32_t resultAvailable,
                            UAcceptResult *outResult,
                            const char *httpAcceptLanguage,
                            UEnumeration* availableLocales,
                            UErrorCode *status);

/**
 * @param acceptList -list of acceptable languages
 * @param acceptListCount - count of acceptList items
 * @param result - buffer to accept the result locale
 * @param resultAvailable the size of the result buffer.
 * @param availableLocales - list of available locales to match
 * @param status Error status, may be BUFFER_OVERFLOW_ERROR
 * @return length needed for the locale.
 * @draft ICU 3.2
 */
U_DRAFT int32_t U_EXPORT2
uloc_acceptLanguage(char *result, int32_t resultAvailable, 
                    UAcceptResult *outResult, const char **acceptList,
                    int32_t acceptListCount,
                    UEnumeration* availableLocales,
                    UErrorCode *status);

/*eof*/


#endif /*_ULOC*/