icu/unicode/uloc.h

   1 /*
   2 **********************************************************************
   3 *   Copyright (C) 1997-2010, International Business Machines
   4 *   Corporation and others.  All Rights Reserved.
   5 **********************************************************************
   6 *
   7 * File ULOC.H
   8 *
   9 * Modification History:
  10 *
  11 *   Date        Name        Description
  12 *   04/01/97    aliu        Creation.
  13 *   08/22/98    stephen     JDK 1.2 sync.
  14 *   12/08/98    rtg         New C API for Locale
  15 *   03/30/99    damiba      overhaul
  16 *   03/31/99    helena      Javadoc for uloc functions.
  17 *   04/15/99    Madhu       Updated Javadoc
  18 ********************************************************************************
  19 */
  20
  21 #ifndef ULOC_H
  22 #define ULOC_H
  23
  24 #include "unicode/utypes.h"
  25 #include "unicode/uenum.h"
  26
  27 /**
  28  * \file
  29  * \brief  C API: Locale
  30  *
  31  * <h2> ULoc C API for Locale </h2>
  32  * A <code>Locale</code> represents a specific geographical, political,
  33  * or cultural region. An operation that requires a <code>Locale</code> to perform
  34  * its task is called <em>locale-sensitive</em> and uses the <code>Locale</code>
  35  * to tailor information for the user. For example, displaying a number
  36  * is a locale-sensitive operation--the number should be formatted
  37  * according to the customs/conventions of the user's native country,
  38  * region, or culture.  In the C APIs, a locales is simply a const char string.
  39  *
  40  * <P>
  41  * You create a <code>Locale</code> with one of the three options listed below.
  42  * Each of the component is separated by '_' in the locale string.
  43  * \htmlonly<blockquote>\endhtmlonly
  44  * <pre>
  45  * \code
  46  *       newLanguage
  47  *
  48  *       newLanguage + newCountry
  49  *
  50  *       newLanguage + newCountry + newVariant
  51  * \endcode
  52  * </pre>
  53  * \htmlonly</blockquote>\endhtmlonly
  54  * The first option is a valid <STRONG>ISO
  55  * Language Code.</STRONG> These codes are the lower-case two-letter
  56  * codes as defined by ISO-639.
  57  * You can find a full list of these codes at a number of sites, such as:
  58  * <BR><a href ="http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt">
  59  * http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt</a>
  60  *
  61  * <P>
  62  * The second option includes an additonal <STRONG>ISO Country
  63  * Code.</STRONG> These codes are the upper-case two-letter codes
  64  * as defined by ISO-3166.
  65  * You can find a full list of these codes at a number of sites, such as:
  66  * <BR><a href="http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html">
  67  * http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html</a>
  68  *
  69  * <P>
  70  * The third option requires another additonal information--the
  71  * <STRONG>Variant.</STRONG>
  72  * The Variant codes are vendor and browser-specific.
  73  * For example, use WIN for Windows, MAC for Macintosh, and POSIX for POSIX.
  74  * Where there are two variants, separate them with an underscore, and
  75  * put the most important one first. For
  76  * example, a Traditional Spanish collation might be referenced, with
  77  * "ES", "ES", "Traditional_WIN".
  78  *
  79  * <P>
  80  * Because a <code>Locale</code> is just an identifier for a region,
  81  * no validity check is performed when you specify a <code>Locale</code>.
  82  * If you want to see whether particular resources are available for the
  83  * <code>Locale</code> you asked for, you must query those resources. For
  84  * example, ask the <code>UNumberFormat</code> for the locales it supports
  85  * using its <code>getAvailable</code> method.
  86  * <BR><STRONG>Note:</STRONG> When you ask for a resource for a particular
  87  * locale, you get back the best available match, not necessarily
  88  * precisely what you asked for. For more information, look at
  89  * <code>UResourceBundle</code>.
  90  *
  91  * <P>
  92  * The <code>Locale</code> provides a number of convenient constants
  93  * that you can use to specify the commonly used
  94  * locales. For example, the following refers to a locale
  95  * for the United States:
  96  * \htmlonly<blockquote>\endhtmlonly
  97  * <pre>
  98  * \code
  99  *       ULOC_US
 100  * \endcode
 101  * </pre>
 102  * \htmlonly</blockquote>\endhtmlonly
 103  *
 104  * <P>
 105  * Once you've specified a locale you can query it for information about
 106  * itself. Use <code>uloc_getCountry</code> to get the ISO Country Code and
 107  * <code>uloc_getLanguage</code> to get the ISO Language Code. You can
 108  * use <code>uloc_getDisplayCountry</code> to get the
 109  * name of the country suitable for displaying to the user. Similarly,
 110  * you can use <code>uloc_getDisplayLanguage</code> to get the name of
 111  * the language suitable for displaying to the user. Interestingly,
 112  * the <code>uloc_getDisplayXXX</code> methods are themselves locale-sensitive
 113  * and have two versions: one that uses the default locale and one
 114  * that takes a locale as an argument and displays the name or country in
 115  * a language appropriate to that locale.
 116  *
 117  * <P>
 118  * The ICU provides a number of services that perform locale-sensitive
 119  * operations. For example, the <code>unum_xxx</code> functions format
 120  * numbers, currency, or percentages in a locale-sensitive manner.
 121  * </P>
 122  * \htmlonly<blockquote>\endhtmlonly
 123  * <pre>
 124  * \code
 125  *     UErrorCode success = U_ZERO_ERROR;
 126  *     UNumberFormat *nf;
 127  *     const char* myLocale = "fr_FR";
 128  *
 129  *     nf = unum_open( UNUM_DEFAULT, NULL, success );
 130  *     unum_close(nf);
 131  *     nf = unum_open( UNUM_CURRENCY, NULL, success );
 132  *     unum_close(nf);
 133  *     nf = unum_open( UNUM_PERCENT, NULL, success );
 134  *     unum_close(nf);
 135  * \endcode
 136  * </pre>
 137  * \htmlonly</blockquote>\endhtmlonly
 138  * Each of these methods has two variants; one with an explicit locale
 139  * and one without; the latter using the default locale.
 140  * \htmlonly<blockquote>\endhtmlonly
 141  * <pre>
 142  * \code
 143  *
 144  *     nf = unum_open( UNUM_DEFAULT, myLocale, success );
 145  *     unum_close(nf);
 146  *     nf = unum_open( UNUM_CURRENCY, myLocale, success );
 147  *     unum_close(nf);
 148  *     nf = unum_open( UNUM_PERCENT, myLocale, success );
 149  *     unum_close(nf);
 150  * \endcode
 151  * </pre>
 152  * \htmlonly</blockquote>\endhtmlonly
 153  * A <code>Locale</code> is the mechanism for identifying the kind of services
 154  * (<code>UNumberFormat</code>) that you would like to get. The locale is
 155  * <STRONG>just</STRONG> a mechanism for identifying these services.
 156  *
 157  * <P>
 158  * Each international serivce that performs locale-sensitive operations
 159  * allows you
 160  * to get all the available objects of that type. You can sift
 161  * through these objects by language, country, or variant,
 162  * and use the display names to present a menu to the user.
 163  * For example, you can create a menu of all the collation objects
 164  * suitable for a given language. Such classes implement these
 165  * three class methods:
 166  * \htmlonly<blockquote>\endhtmlonly
 167  * <pre>
 168  * \code
 169  *       const char* uloc_getAvailable(int32_t index);
 170  *       int32_t uloc_countAvailable();
 171  *       int32_t
 172  *       uloc_getDisplayName(const char* localeID,
 173  *                 const char* inLocaleID,
 174  *                 UChar* result,
 175  *                 int32_t maxResultSize,
 176  *                  UErrorCode* err);
 177  *
 178  * \endcode
 179  * </pre>
 180  * \htmlonly</blockquote>\endhtmlonly
 181  * <P>
 182  * Concerning POSIX/RFC1766 Locale IDs,
 183  *  the getLanguage/getCountry/getVariant/getName functions do understand
 184  * the POSIX type form of  language_COUNTRY.ENCODING\@VARIANT
 185  * and if there is not an ICU-stype variant, uloc_getVariant() for example
 186  * will return the one listed after the \@at sign. As well, the hyphen
 187  * "-" is recognized as a country/variant separator similarly to RFC1766.
 188  * So for example, "en-us" will be interpreted as en_US.
 189  * As a result, uloc_getName() is far from a no-op, and will have the
 190  * effect of converting POSIX/RFC1766 IDs into ICU form, although it does
 191  * NOT map any of the actual codes (i.e. russian->ru) in any way.
 192  * Applications should call uloc_getName() at the point where a locale ID
 193  * is coming from an external source (user entry, OS, web browser)
 194  * and pass the resulting string to other ICU functions.  For example,
 195  * don't use de-de\@EURO as an argument to resourcebundle.
 196  *
 197  * @see UResourceBundle
 198  */
 199
 200 /** Useful constant for this language. @stable ICU 2.0 */
 201 #define ULOC_CHINESE            "zh"
 202 /** Useful constant for this language. @stable ICU 2.0 */
 203 #define ULOC_ENGLISH            "en"
 204 /** Useful constant for this language. @stable ICU 2.0 */
 205 #define ULOC_FRENCH             "fr"
 206 /** Useful constant for this language. @stable ICU 2.0 */
 207 #define ULOC_GERMAN             "de"
 208 /** Useful constant for this language. @stable ICU 2.0 */
 209 #define ULOC_ITALIAN            "it"
 210 /** Useful constant for this language. @stable ICU 2.0 */
 211 #define ULOC_JAPANESE           "ja"
 212 /** Useful constant for this language. @stable ICU 2.0 */
 213 #define ULOC_KOREAN             "ko"
 214 /** Useful constant for this language. @stable ICU 2.0 */
 215 #define ULOC_SIMPLIFIED_CHINESE "zh_CN"
 216 /** Useful constant for this language. @stable ICU 2.0 */
 217 #define ULOC_TRADITIONAL_CHINESE "zh_TW"
 218
 219 /** Useful constant for this country/region. @stable ICU 2.0 */
 220 #define ULOC_CANADA         "en_CA"
 221 /** Useful constant for this country/region. @stable ICU 2.0 */
 222 #define ULOC_CANADA_FRENCH  "fr_CA"
 223 /** Useful constant for this country/region. @stable ICU 2.0 */
 224 #define ULOC_CHINA          "zh_CN"
 225 /** Useful constant for this country/region. @stable ICU 2.0 */
 226 #define ULOC_PRC            "zh_CN"
 227 /** Useful constant for this country/region. @stable ICU 2.0 */
 228 #define ULOC_FRANCE         "fr_FR"
 229 /** Useful constant for this country/region. @stable ICU 2.0 */
 230 #define ULOC_GERMANY        "de_DE"
 231 /** Useful constant for this country/region. @stable ICU 2.0 */
 232 #define ULOC_ITALY          "it_IT"
 233 /** Useful constant for this country/region. @stable ICU 2.0 */
 234 #define ULOC_JAPAN          "ja_JP"
 235 /** Useful constant for this country/region. @stable ICU 2.0 */
 236 #define ULOC_KOREA          "ko_KR"
 237 /** Useful constant for this country/region. @stable ICU 2.0 */
 238 #define ULOC_TAIWAN         "zh_TW"
 239 /** Useful constant for this country/region. @stable ICU 2.0 */
 240 #define ULOC_UK             "en_GB"
 241 /** Useful constant for this country/region. @stable ICU 2.0 */
 242 #define ULOC_US             "en_US"
 243
 244 /**
 245  * Useful constant for the maximum size of the language part of a locale ID.
 246  * (including the terminating NULL).
 247  * @stable ICU 2.0
 248  */
 249 #define ULOC_LANG_CAPACITY 12
 250
 251 /**
 252  * Useful constant for the maximum size of the country part of a locale ID
 253  * (including the terminating NULL).
 254  * @stable ICU 2.0
 255  */
 256 #define ULOC_COUNTRY_CAPACITY 4
 257 /**
 258  * Useful constant for the maximum size of the whole locale ID
 259  * (including the terminating NULL and all keywords).
 260  * @stable ICU 2.0
 261  */
 262 #define ULOC_FULLNAME_CAPACITY 157
 263
 264 /**
 265  * Useful constant for the maximum size of the script part of a locale ID
 266  * (including the terminating NULL).
 267  * @stable ICU 2.8
 268  */
 269 #define ULOC_SCRIPT_CAPACITY 6
 270
 271 /**
 272  * Useful constant for the maximum size of keywords in a locale
 273  * @stable ICU 2.8
 274  */
 275 #define ULOC_KEYWORDS_CAPACITY 50
 276
 277 /**
 278  * Useful constant for the maximum total size of keywords and their values in a locale
 279  * @stable ICU 2.8
 280  */
 281 #define ULOC_KEYWORD_AND_VALUES_CAPACITY 100
 282
 283 /**
 284  * Invariant character separating keywords from the locale string
 285  * @stable ICU 2.8
 286  */
 287 #define ULOC_KEYWORD_SEPARATOR '@'
 288
 289 /**
 290   * Unicode code point for '@' separating keywords from the locale string.
 291   * @see ULOC_KEYWORD_SEPARATOR
 292   * @draft ICU 4.6
 293   */
 294 #define ULOC_KEYWORD_SEPARATOR_UNICODE 0x40
 295
 296 /**
 297  * Invariant character for assigning value to a keyword
 298  * @stable ICU 2.8
 299  */
 300 #define ULOC_KEYWORD_ASSIGN '='
 301
 302 /**
 303   * Unicode code point for '=' for assigning value to a keyword.
 304   * @see ULOC_KEYWORD_ASSIGN
 305   * @draft ICU 4.6
 306   */
 307 #define ULOC_KEYWORD_ASSIGN_UNICODE 0x3D
 308
 309 /**
 310  * Invariant character separating keywords
 311  * @stable ICU 2.8
 312  */
 313 #define ULOC_KEYWORD_ITEM_SEPARATOR ';'
 314
 315 /**
 316   * Unicode code point for ';' separating keywords
 317   * @see ULOC_KEYWORD_ITEM_SEPARATOR
 318   * @draft ICU 4.6
 319   */
 320 #define ULOC_KEYWORD_ITEM_SEPARATOR_UNICODE 0x3B
 321
 322 /**
 323  * Constants for *_getLocale()
 324  * Allow user to select whether she wants information on
 325  * requested, valid or actual locale.
 326  * For example, a collator for "en_US_CALIFORNIA" was
 327  * requested. In the current state of ICU (2.0),
 328  * the requested locale is "en_US_CALIFORNIA",
 329  * the valid locale is "en_US" (most specific locale supported by ICU)
 330  * and the actual locale is "root" (the collation data comes unmodified
 331  * from the UCA)
 332  * The locale is considered supported by ICU if there is a core ICU bundle
 333  * for that locale (although it may be empty).
 334  * @stable ICU 2.1
 335  */
 336 typedef enum {
 337   /** This is locale the data actually comes from
 338    * @stable ICU 2.1
 339    */
 340   ULOC_ACTUAL_LOCALE    = 0,
 341   /** This is the most specific locale supported by ICU
 342    * @stable ICU 2.1
 343    */
 344   ULOC_VALID_LOCALE    = 1,
 345
 346 #ifndef U_HIDE_DEPRECATED_API
 347   /** This is the requested locale
 348    *  @deprecated ICU 2.8
 349    */
 350   ULOC_REQUESTED_LOCALE = 2,
 351 #endif /* U_HIDE_DEPRECATED_API */
 352
 353   ULOC_DATA_LOCALE_TYPE_LIMIT = 3
 354 } ULocDataLocaleType ;
 355
 356
 357 /**
 358  * Gets ICU's default locale.
 359  * The returned string is a snapshot in time, and will remain valid
 360  *   and unchanged even when uloc_setDefault() is called.
 361  *   The returned storage is owned by ICU, and must not be altered or deleted
 362  *   by the caller.
 363  *
 364  * @return the ICU default locale
 365  * @system
 366  * @stable ICU 2.0
 367  */
 368 U_STABLE const char* U_EXPORT2
 369 uloc_getDefault(void);
 370
 371 /**
 372  * Sets ICU's default locale.
 373  *    By default (without calling this function), ICU's default locale will be based
 374  *    on information obtained from the underlying system environment.
 375  *    <p>
 376  *    Changes to ICU's default locale do not propagate back to the
 377  *    system environment.
 378  *    <p>
 379  *    Changes to ICU's default locale to not affect any ICU services that
 380  *    may already be open based on the previous default locale value.
 381  *
 382  * @param localeID the new ICU default locale. A value of NULL will try to get
 383  *                 the system's default locale.
 384  * @param status the error information if the setting of default locale fails
 385  * @system
 386  * @stable ICU 2.0
 387  */
 388 U_STABLE void U_EXPORT2
 389 uloc_setDefault(const char* localeID,
 390         UErrorCode*       status);
 391
 392 /**
 393  * Gets the language code for the specified locale.
 394  *
 395  * @param localeID the locale to get the ISO language code with
 396  * @param language the language code for localeID
 397  * @param languageCapacity the size of the language buffer to store the
 398  * language code with
 399  * @param err error information if retrieving the language code failed
 400  * @return the actual buffer size needed for the language code.  If it's greater
 401  * than languageCapacity, the returned language code will be truncated.
 402  * @stable ICU 2.0
 403  */
 404 U_STABLE int32_t U_EXPORT2
 405 uloc_getLanguage(const char*    localeID,
 406          char* language,
 407          int32_t languageCapacity,
 408          UErrorCode* err);
 409
 410 /**
 411  * Gets the script code for the specified locale.
 412  *
 413  * @param localeID the locale to get the ISO language code with
 414  * @param script the language code for localeID
 415  * @param scriptCapacity the size of the language buffer to store the
 416  * language code with
 417  * @param err error information if retrieving the language code failed
 418  * @return the actual buffer size needed for the language code.  If it's greater
 419  * than scriptCapacity, the returned language code will be truncated.
 420  * @stable ICU 2.8
 421  */
 422 U_STABLE int32_t U_EXPORT2
 423 uloc_getScript(const char*    localeID,
 424          char* script,
 425          int32_t scriptCapacity,
 426          UErrorCode* err);
 427
 428 /**
 429  * Gets the  country code for the specified locale.
 430  *
 431  * @param localeID the locale to get the country code with
 432  * @param country the country code for localeID
 433  * @param countryCapacity the size of the country buffer to store the
 434  * country code with
 435  * @param err error information if retrieving the country code failed
 436  * @return the actual buffer size needed for the country code.  If it's greater
 437  * than countryCapacity, the returned country code will be truncated.
 438  * @stable ICU 2.0
 439  */
 440 U_STABLE int32_t U_EXPORT2
 441 uloc_getCountry(const char*    localeID,
 442         char* country,
 443         int32_t countryCapacity,
 444         UErrorCode* err);
 445
 446 /**
 447  * Gets the variant code for the specified locale.
 448  *
 449  * @param localeID the locale to get the variant code with
 450  * @param variant the variant code for localeID
 451  * @param variantCapacity the size of the variant buffer to store the
 452  * variant code with
 453  * @param err error information if retrieving the variant code failed
 454  * @return the actual buffer size needed for the variant code.  If it's greater
 455  * than variantCapacity, the returned variant code will be truncated.
 456  * @stable ICU 2.0
 457  */
 458 U_STABLE int32_t U_EXPORT2
 459 uloc_getVariant(const char*    localeID,
 460         char* variant,
 461         int32_t variantCapacity,
 462         UErrorCode* err);
 463
 464
 465 /**
 466  * Gets the full name for the specified locale.
 467  * Note: This has the effect of 'canonicalizing' the ICU locale ID to
 468  * a certain extent. Upper and lower case are set as needed.
 469  * It does NOT map aliased names in any way.
 470  * See the top of this header file.
 471  * This API supports preflighting.
 472  *
 473  * @param localeID the locale to get the full name with
 474  * @param name fill in buffer for the name without keywords.
 475  * @param nameCapacity capacity of the fill in buffer.
 476  * @param err error information if retrieving the full name failed
 477  * @return the actual buffer size needed for the full name.  If it's greater
 478  * than nameCapacity, the returned full name will be truncated.
 479  * @stable ICU 2.0
 480  */
 481 U_STABLE int32_t U_EXPORT2
 482 uloc_getName(const char*    localeID,
 483          char* name,
 484          int32_t nameCapacity,
 485          UErrorCode* err);
 486
 487 /**
 488  * Gets the full name for the specified locale.
 489  * Note: This has the effect of 'canonicalizing' the string to
 490  * a certain extent. Upper and lower case are set as needed,
 491  * and if the components were in 'POSIX' format they are changed to
 492  * ICU format.  It does NOT map aliased names in any way.
 493  * See the top of this header file.
 494  *
 495  * @param localeID the locale to get the full name with
 496  * @param name the full name for localeID
 497  * @param nameCapacity the size of the name buffer to store the
 498  * full name with
 499  * @param err error information if retrieving the full name failed
 500  * @return the actual buffer size needed for the full name.  If it's greater
 501  * than nameCapacity, the returned full name will be truncated.
 502  * @stable ICU 2.8
 503  */
 504 U_STABLE int32_t U_EXPORT2
 505 uloc_canonicalize(const char*    localeID,
 506          char* name,
 507          int32_t nameCapacity,
 508          UErrorCode* err);
 509
 510 /**
 511  * Gets the ISO language code for the specified locale.
 512  *
 513  * @param localeID the locale to get the ISO language code with
 514  * @return language the ISO language code for localeID
 515  * @stable ICU 2.0
 516  */
 517 U_STABLE const char* U_EXPORT2
 518 uloc_getISO3Language(const char* localeID);
 519
 520
 521 /**
 522  * Gets the ISO country code for the specified locale.
 523  *
 524  * @param localeID the locale to get the ISO country code with
 525  * @return country the ISO country code for localeID
 526  * @stable ICU 2.0
 527  */
 528 U_STABLE const char* U_EXPORT2
 529 uloc_getISO3Country(const char* localeID);
 530
 531 /**
 532  * Gets the Win32 LCID value for the specified locale.
 533  * If the ICU locale is not recognized by Windows, 0 will be returned.
 534  *
 535  * @param localeID the locale to get the Win32 LCID value with
 536  * @return country the Win32 LCID for localeID
 537  * @stable ICU 2.0
 538  */
 539 U_STABLE uint32_t U_EXPORT2
 540 uloc_getLCID(const char* localeID);
 541
 542 /**
 543  * Gets the language name suitable for display for the specified locale.
 544  *
 545  * @param locale the locale to get the ISO language code with
 546  * @param displayLocale Specifies the locale to be used to display the name.  In other words,
 547  *                 if the locale's language code is "en", passing Locale::getFrench() for
 548  *                 inLocale would result in "Anglais", while passing Locale::getGerman()
 549  *                 for inLocale would result in "Englisch".
 550  * @param language the displayable language code for localeID
 551  * @param languageCapacity the size of the language buffer to store the
 552  * displayable language code with
 553  * @param status error information if retrieving the displayable language code failed
 554  * @return the actual buffer size needed for the displayable language code.  If it's greater
 555  * than languageCapacity, the returned language code will be truncated.
 556  * @stable ICU 2.0
 557  */
 558 U_STABLE int32_t U_EXPORT2
 559 uloc_getDisplayLanguage(const char* locale,
 560             const char* displayLocale,
 561             UChar* language,
 562             int32_t languageCapacity,
 563             UErrorCode* status);
 564
 565 /**
 566  * Gets the script name suitable for display for the specified locale.
 567  *
 568  * @param locale the locale to get the displayable script code with. NULL may be used to specify the default.
 569  * @param displayLocale Specifies the locale to be used to display the name.  In other words,
 570  *                 if the locale's language code is "en", passing Locale::getFrench() for
 571  *                 inLocale would result in "", while passing Locale::getGerman()
 572  *                 for inLocale would result in "". NULL may be used to specify the default.
 573  * @param script the displayable country code for localeID
 574  * @param scriptCapacity the size of the script buffer to store the
 575  * displayable script code with
 576  * @param status error information if retrieving the displayable script code failed
 577  * @return the actual buffer size needed for the displayable script code.  If it's greater
 578  * than scriptCapacity, the returned displayable script code will be truncated.
 579  * @stable ICU 2.8
 580  */
 581 U_STABLE int32_t U_EXPORT2
 582 uloc_getDisplayScript(const char* locale,
 583             const char* displayLocale,
 584             UChar* script,
 585             int32_t scriptCapacity,
 586             UErrorCode* status);
 587
 588 /**
 589  * Gets the country name suitable for display for the specified locale.
 590  *
 591  * @param locale the locale to get the displayable country code with. NULL may be used to specify the default.
 592  * @param displayLocale Specifies the locale to be used to display the name.  In other words,
 593  *                 if the locale's language code is "en", passing Locale::getFrench() for
 594  *                 inLocale would result in "Anglais", while passing Locale::getGerman()
 595  *                 for inLocale would result in "Englisch". NULL may be used to specify the default.
 596  * @param country the displayable country code for localeID
 597  * @param countryCapacity the size of the country buffer to store the
 598  * displayable country code with
 599  * @param status error information if retrieving the displayable country code failed
 600  * @return the actual buffer size needed for the displayable country code.  If it's greater
 601  * than countryCapacity, the returned displayable country code will be truncated.
 602  * @stable ICU 2.0
 603  */
 604 U_STABLE int32_t U_EXPORT2
 605 uloc_getDisplayCountry(const char* locale,
 606                        const char* displayLocale,
 607                        UChar* country,
 608                        int32_t countryCapacity,
 609                        UErrorCode* status);
 610
 611
 612 /**
 613  * Gets the variant name suitable for display for the specified locale.
 614  *
 615  * @param locale the locale to get the displayable variant code with. NULL may be used to specify the default.
 616  * @param displayLocale Specifies the locale to be used to display the name.  In other words,
 617  *                 if the locale's language code is "en", passing Locale::getFrench() for
 618  *                 inLocale would result in "Anglais", while passing Locale::getGerman()
 619  *                 for inLocale would result in "Englisch". NULL may be used to specify the default.
 620  * @param variant the displayable variant code for localeID
 621  * @param variantCapacity the size of the variant buffer to store the
 622  * displayable variant code with
 623  * @param status error information if retrieving the displayable variant code failed
 624  * @return the actual buffer size needed for the displayable variant code.  If it's greater
 625  * than variantCapacity, the returned displayable variant code will be truncated.
 626  * @stable ICU 2.0
 627  */
 628 U_STABLE int32_t U_EXPORT2
 629 uloc_getDisplayVariant(const char* locale,
 630                        const char* displayLocale,
 631                        UChar* variant,
 632                        int32_t variantCapacity,
 633                        UErrorCode* status);
 634
 635 /**
 636  * Gets the keyword name suitable for display for the specified locale.
 637  * E.g: for the locale string de_DE\@collation=PHONEBOOK, this API gets the display
 638  * string for the keyword collation.
 639  * Usage:
 640  * <code>
 641  *    UErrorCode status = U_ZERO_ERROR;
 642  *    const char* keyword =NULL;
 643  *    int32_t keywordLen = 0;
 644  *    int32_t keywordCount = 0;
 645  *    UChar displayKeyword[256];
 646  *    int32_t displayKeywordLen = 0;
 647  *    UEnumeration* keywordEnum = uloc_openKeywords("de_DE@collation=PHONEBOOK;calendar=TRADITIONAL", &status);
 648  *    for(keywordCount = uenum_count(keywordEnum, &status); keywordCount > 0 ; keywordCount--){
 649  *          if(U_FAILURE(status)){
 650  *              ...something went wrong so handle the error...
 651  *              break;
 652  *          }
 653  *          // the uenum_next returns NUL terminated string
 654  *          keyword = uenum_next(keywordEnum, &keywordLen, &status);
 655  *          displayKeywordLen = uloc_getDisplayKeyword(keyword, "en_US", displayKeyword, 256);
 656  *          ... do something interesting .....
 657  *    }
 658  *    uenum_close(keywordEnum);
 659  * </code>
 660  * @param keyword           The keyword whose display string needs to be returned.
 661  * @param displayLocale     Specifies the locale to be used to display the name.  In other words,
 662  *                          if the locale's language code is "en", passing Locale::getFrench() for
 663  *                          inLocale would result in "Anglais", while passing Locale::getGerman()
 664  *                          for inLocale would result in "Englisch". NULL may be used to specify the default.
 665  * @param dest              the buffer to which the displayable keyword should be written.
 666  * @param destCapacity      The size of the buffer (number of UChars). If it is 0, then
 667  *                          dest may be NULL and the function will only return the length of the
 668  *                          result without writing any of the result string (pre-flighting).
 669  * @param status            error information if retrieving the displayable string failed.
 670  *                          Should not be NULL and should not indicate failure on entry.
 671  * @return the actual buffer size needed for the displayable variant code.
 672  * @see #uloc_openKeywords
 673  * @stable ICU 2.8
 674  */
 675 U_STABLE int32_t U_EXPORT2
 676 uloc_getDisplayKeyword(const char* keyword,
 677                        const char* displayLocale,
 678                        UChar* dest,
 679                        int32_t destCapacity,
 680                        UErrorCode* status);
 681 /**
 682  * Gets the value of the keyword suitable for display for the specified locale.
 683  * E.g: for the locale string de_DE\@collation=PHONEBOOK, this API gets the display
 684  * string for PHONEBOOK, in the display locale, when "collation" is specified as the keyword.
 685  *
 686  * @param locale            The locale to get the displayable variant code with. NULL may be used to specify the default.
 687  * @param keyword           The keyword for whose value should be used.
 688  * @param displayLocale     Specifies the locale to be used to display the name.  In other words,
 689  *                          if the locale's language code is "en", passing Locale::getFrench() for
 690  *                          inLocale would result in "Anglais", while passing Locale::getGerman()
 691  *                          for inLocale would result in "Englisch". NULL may be used to specify the default.
 692  * @param dest              the buffer to which the displayable keyword should be written.
 693  * @param destCapacity      The size of the buffer (number of UChars). If it is 0, then
 694  *                          dest may be NULL and the function will only return the length of the
 695  *                          result without writing any of the result string (pre-flighting).
 696  * @param status            error information if retrieving the displayable string failed.
 697  *                          Should not be NULL and must not indicate failure on entry.
 698  * @return the actual buffer size needed for the displayable variant code.
 699  * @stable ICU 2.8
 700  */
 701 U_STABLE int32_t U_EXPORT2
 702 uloc_getDisplayKeywordValue(   const char* locale,
 703                                const char* keyword,
 704                                const char* displayLocale,
 705                                UChar* dest,
 706                                int32_t destCapacity,
 707                                UErrorCode* status);
 708 /**
 709  * Gets the full name suitable for display for the specified locale.
 710  *
 711  * @param localeID the locale to get the displayable name with. NULL may be used to specify the default.
 712  * @param inLocaleID Specifies the locale to be used to display the name.  In other words,
 713  *                   if the locale's language code is "en", passing Locale::getFrench() for
 714  *                   inLocale would result in "Anglais", while passing Locale::getGerman()
 715  *                   for inLocale would result in "Englisch". NULL may be used to specify the default.
 716  * @param result the displayable name for localeID
 717  * @param maxResultSize the size of the name buffer to store the
 718  * displayable full name with
 719  * @param err error information if retrieving the displayable name failed
 720  * @return the actual buffer size needed for the displayable name.  If it's greater
 721  * than maxResultSize, the returned displayable name will be truncated.
 722  * @stable ICU 2.0
 723  */
 724 U_STABLE int32_t U_EXPORT2
 725 uloc_getDisplayName(const char* localeID,
 726             const char* inLocaleID,
 727             UChar* result,
 728             int32_t maxResultSize,
 729             UErrorCode* err);
 730
 731
 732 /**
 733  * Gets the specified locale from a list of all available locales.
 734  * The return value is a pointer to an item of
 735  * a locale name array.  Both this array and the pointers
 736  * it contains are owned by ICU and should not be deleted or written through
 737  * by the caller.  The locale name is terminated by a null pointer.
 738  * @param n the specific locale name index of the available locale list
 739  * @return a specified locale name of all available locales
 740  * @stable ICU 2.0
 741  */
 742 U_STABLE const char* U_EXPORT2
 743 uloc_getAvailable(int32_t n);
 744
 745 /**
 746  * Gets the size of the all available locale list.
 747  *
 748  * @return the size of the locale list
 749  * @stable ICU 2.0
 750  */
 751 U_STABLE int32_t U_EXPORT2 uloc_countAvailable(void);
 752
 753 /**
 754  *
 755  * Gets a list of all available language codes defined in ISO 639.  This is a pointer
 756  * to an array of pointers to arrays of char.  All of these pointers are owned
 757  * by ICU-- do not delete them, and do not write through them.  The array is
 758  * terminated with a null pointer.
 759  * @return a list of all available language codes
 760  * @stable ICU 2.0
 761  */
 762 U_STABLE const char* const* U_EXPORT2
 763 uloc_getISOLanguages(void);
 764
 765 /**
 766  *
 767  * Gets a list of all available 2-letter country codes defined in ISO 639.  This is a
 768  * pointer to an array of pointers to arrays of char.  All of these pointers are
 769  * owned by ICU-- do not delete them, and do not write through them.  The array is
 770  * terminated with a null pointer.
 771  * @return a list of all available country codes
 772  * @stable ICU 2.0
 773  */
 774 U_STABLE const char* const* U_EXPORT2
 775 uloc_getISOCountries(void);
 776
 777 /**
 778  * Truncate the locale ID string to get the parent locale ID.
 779  * Copies the part of the string before the last underscore.
 780  * The parent locale ID will be an empty string if there is no
 781  * underscore, or if there is only one underscore at localeID[0].
 782  *
 783  * @param localeID Input locale ID string.
 784  * @param parent   Output string buffer for the parent locale ID.
 785  * @param parentCapacity Size of the output buffer.
 786  * @param err A UErrorCode value.
 787  * @return The length of the parent locale ID.
 788  * @stable ICU 2.0
 789  */
 790 U_STABLE int32_t U_EXPORT2
 791 uloc_getParent(const char*    localeID,
 792                  char* parent,
 793                  int32_t parentCapacity,
 794                  UErrorCode* err);
 795
 796
 797
 798
 799 /**
 800  * Gets the full name for the specified locale.
 801  * Note: This has the effect of 'canonicalizing' the string to
 802  * a certain extent. Upper and lower case are set as needed,
 803  * and if the components were in 'POSIX' format they are changed to
 804  * ICU format.  It does NOT map aliased names in any way.
 805  * See the top of this header file.
 806  * This API strips off the keyword part, so "de_DE\@collation=phonebook"
 807  * will become "de_DE".
 808  * This API supports preflighting.
 809  *
 810  * @param localeID the locale to get the full name with
 811  * @param name fill in buffer for the name without keywords.
 812  * @param nameCapacity capacity of the fill in buffer.
 813  * @param err error information if retrieving the full name failed
 814  * @return the actual buffer size needed for the full name.  If it's greater
 815  * than nameCapacity, the returned full name will be truncated.
 816  * @stable ICU 2.8
 817  */
 818 U_STABLE int32_t U_EXPORT2
 819 uloc_getBaseName(const char*    localeID,
 820          char* name,
 821          int32_t nameCapacity,
 822          UErrorCode* err);
 823
 824 /**
 825  * Gets an enumeration of keywords for the specified locale. Enumeration
 826  * must get disposed of by the client using uenum_close function.
 827  *
 828  * @param localeID the locale to get the variant code with
 829  * @param status error information if retrieving the keywords failed
 830  * @return enumeration of keywords or NULL if there are no keywords.
 831  * @stable ICU 2.8
 832  */
 833 U_STABLE UEnumeration* U_EXPORT2
 834 uloc_openKeywords(const char* localeID,
 835                         UErrorCode* status);
 836
 837 /**
 838  * Get the value for a keyword. Locale name does not need to be normalized.
 839  *
 840  * @param localeID locale name containing the keyword ("de_DE@currency=EURO;collation=PHONEBOOK")
 841  * @param keywordName name of the keyword for which we want the value. Case insensitive.
 842  * @param buffer receiving buffer
 843  * @param bufferCapacity capacity of receiving buffer
 844  * @param status containing error code - buffer not big enough.
 845  * @return the length of keyword value
 846  * @stable ICU 2.8
 847  */
 848 U_STABLE int32_t U_EXPORT2
 849 uloc_getKeywordValue(const char* localeID,
 850                      const char* keywordName,
 851                      char* buffer, int32_t bufferCapacity,
 852                      UErrorCode* status);
 853
 854
 855 /**
 856  * Set the value of the specified keyword.
 857  * NOTE: Unlike almost every other ICU function which takes a
 858  * buffer, this function will NOT truncate the output text. If a
 859  * BUFFER_OVERFLOW_ERROR is received, it means that the original
 860  * buffer is untouched. This is done to prevent incorrect or possibly
 861  * even malformed locales from being generated and used.
 862  *
 863  * @param keywordName name of the keyword to be set. Case insensitive.
 864  * @param keywordValue value of the keyword to be set. If 0-length or
 865  *  NULL, will result in the keyword being removed. No error is given if
 866  *  that keyword does not exist.
 867  * @param buffer input buffer containing locale to be modified.
 868  * @param bufferCapacity capacity of receiving buffer
 869  * @param status containing error code - buffer not big enough.
 870  * @return the length needed for the buffer
 871  * @see uloc_getKeywordValue
 872  * @stable ICU 3.2
 873  */
 874 U_STABLE int32_t U_EXPORT2
 875 uloc_setKeywordValue(const char* keywordName,
 876                      const char* keywordValue,
 877                      char* buffer, int32_t bufferCapacity,
 878                      UErrorCode* status);
 879
 880 /**
 881  * enums for the  return value for the character and line orientation
 882  * functions.
 883  * @stable ICU 4.0
 884  */
 885 typedef enum {
 886   ULOC_LAYOUT_LTR   = 0,  /* left-to-right. */
 887   ULOC_LAYOUT_RTL    = 1,  /* right-to-left. */
 888   ULOC_LAYOUT_TTB    = 2,  /* top-to-bottom. */
 889   ULOC_LAYOUT_BTT    = 3,   /* bottom-to-top. */
 890   ULOC_LAYOUT_UNKNOWN
 891 } ULayoutType;
 892
 893 /**
 894  * Get the layout character orientation for the specified locale.
 895  *
 896  * @param localeId locale name
 897  * @param status Error status
 898  * @return an enum indicating the layout orientation for characters.
 899  * @stable ICU 4.0
 900  */
 901 U_STABLE ULayoutType U_EXPORT2
 902 uloc_getCharacterOrientation(const char* localeId,
 903                              UErrorCode *status);
 904
 905 /**
 906  * Get the layout line orientation for the specified locale.
 907  *
 908  * @param localeId locale name
 909  * @param status Error status
 910  * @return an enum indicating the layout orientation for lines.
 911  * @stable ICU 4.0
 912  */
 913 U_STABLE ULayoutType U_EXPORT2
 914 uloc_getLineOrientation(const char* localeId,
 915                         UErrorCode *status);
 916
 917 /**
 918  * enums for the 'outResult' parameter return value
 919  * @see uloc_acceptLanguageFromHTTP
 920  * @see uloc_acceptLanguage
 921  * @stable ICU 3.2
 922  */
 923 typedef enum {
 924   ULOC_ACCEPT_FAILED   = 0,  /* No exact match was found. */
 925   ULOC_ACCEPT_VALID    = 1,  /* An exact match was found. */
 926   ULOC_ACCEPT_FALLBACK = 2   /* A fallback was found, for example,
 927                                 Accept list contained 'ja_JP'
 928                                 which matched available locale 'ja'. */
 929 } UAcceptResult;
 930
 931
 932 /**
 933  * Based on a HTTP header from a web browser and a list of available locales,
 934  * determine an acceptable locale for the user.
 935  * @param result - buffer to accept the result locale
 936  * @param resultAvailable the size of the result buffer.
 937  * @param outResult - An out parameter that contains the fallback status
 938  * @param httpAcceptLanguage - "Accept-Language:" header as per HTTP.
 939  * @param availableLocales - list of available locales to match
 940  * @param status Error status, may be BUFFER_OVERFLOW_ERROR
 941  * @return length needed for the locale.
 942  * @stable ICU 3.2
 943  */
 944 U_STABLE int32_t U_EXPORT2
 945 uloc_acceptLanguageFromHTTP(char *result, int32_t resultAvailable,
 946                             UAcceptResult *outResult,
 947                             const char *httpAcceptLanguage,
 948                             UEnumeration* availableLocales,
 949                             UErrorCode *status);
 950
 951 /**
 952  * Based on a list of available locales,
 953  * determine an acceptable locale for the user.
 954  * @param result - buffer to accept the result locale
 955  * @param resultAvailable the size of the result buffer.
 956  * @param outResult - An out parameter that contains the fallback status
 957  * @param acceptList - list of acceptable languages
 958  * @param acceptListCount - count of acceptList items
 959  * @param availableLocales - list of available locales to match
 960  * @param status Error status, may be BUFFER_OVERFLOW_ERROR
 961  * @return length needed for the locale.
 962  * @stable ICU 3.2
 963  */
 964 U_STABLE int32_t U_EXPORT2
 965 uloc_acceptLanguage(char *result, int32_t resultAvailable,
 966                     UAcceptResult *outResult, const char **acceptList,
 967                     int32_t acceptListCount,
 968                     UEnumeration* availableLocales,
 969                     UErrorCode *status);
 970
 971
 972 /**
 973  * Gets the ICU locale ID for the specified Win32 LCID value.
 974  *
 975  * @param hostID the Win32 LCID to translate
 976  * @param locale the output buffer for the ICU locale ID, which will be NUL-terminated
 977  *  if there is room.
 978  * @param localeCapacity the size of the output buffer
 979  * @param status an error is returned if the LCID is unrecognized or the output buffer
 980  *  is too small
 981  * @return actual the actual size of the locale ID, not including NUL-termination
 982  * @stable ICU 3.8
 983  */
 984 U_STABLE int32_t U_EXPORT2
 985 uloc_getLocaleForLCID(uint32_t hostID, char *locale, int32_t localeCapacity,
 986                     UErrorCode *status);
 987
 988
 989 /**
 990  * Add the likely subtags for a provided locale ID, per the algorithm described
 991  * in the following CLDR technical report:
 992  *
 993  *   http://www.unicode.org/reports/tr35/#Likely_Subtags
 994  *
 995  * If localeID is already in the maximal form, or there is no data available
 996  * for maximization, it will be copied to the output buffer.  For example,
 997  * "und-Zzzz" cannot be maximized, since there is no reasonable maximization.
 998  *
 999  * Examples:
1000  *
1001  * "en" maximizes to "en_Latn_US"
1002  *
1003  * "de" maximizes to "de_Latn_US"
1004  *
1005  * "sr" maximizes to "sr_Cyrl_RS"
1006  *
1007  * "sh" maximizes to "sr_Latn_RS" (Note this will not reverse.)
1008  *
1009  * "zh_Hani" maximizes to "zh_Hans_CN" (Note this will not reverse.)
1010  *
1011  * @param localeID The locale to maximize
1012  * @param maximizedLocaleID The maximized locale
1013  * @param maximizedLocaleIDCapacity The capacity of the maximizedLocaleID buffer
1014  * @param err Error information if maximizing the locale failed.  If the length
1015  * of the localeID and the null-terminator is greater than the maximum allowed size,
1016  * or the localeId is not well-formed, the error code is U_ILLEGAL_ARGUMENT_ERROR.
1017  * @return The actual buffer size needed for the maximized locale.  If it's
1018  * greater than maximizedLocaleIDCapacity, the returned ID will be truncated.
1019  * On error, the return value is -1.
1020  * @stable ICU 4.0
1021  */
1022 U_STABLE int32_t U_EXPORT2
1023 uloc_addLikelySubtags(const char*    localeID,
1024          char* maximizedLocaleID,
1025          int32_t maximizedLocaleIDCapacity,
1026          UErrorCode* err);
1027
1028
1029 /**
1030  * Minimize the subtags for a provided locale ID, per the algorithm described
1031  * in the following CLDR technical report:
1032  *
1033  *   http://www.unicode.org/reports/tr35/#Likely_Subtags
1034  *
1035  * If localeID is already in the minimal form, or there is no data available
1036  * for minimization, it will be copied to the output buffer.  Since the
1037  * minimization algorithm relies on proper maximization, see the comments
1038  * for uloc_addLikelySubtags for reasons why there might not be any data.
1039  *
1040  * Examples:
1041  *
1042  * "en_Latn_US" minimizes to "en"
1043  *
1044  * "de_Latn_US" minimizes to "de"
1045  *
1046  * "sr_Cyrl_RS" minimizes to "sr"
1047  *
1048  * "zh_Hant_TW" minimizes to "zh_TW" (The region is preferred to the
1049  * script, and minimizing to "zh" would imply "zh_Hans_CN".)
1050  *
1051  * @param localeID The locale to minimize
1052  * @param minimizedLocaleID The minimized locale
1053  * @param minimizedLocaleIDCapacity The capacity of the minimizedLocaleID buffer
1054  * @param err Error information if minimizing the locale failed.  If the length
1055  * of the localeID and the null-terminator is greater than the maximum allowed size,
1056  * or the localeId is not well-formed, the error code is U_ILLEGAL_ARGUMENT_ERROR.
1057  * @return The actual buffer size needed for the minimized locale.  If it's
1058  * greater than minimizedLocaleIDCapacity, the returned ID will be truncated.
1059  * On error, the return value is -1.
1060  * @stable ICU 4.0
1061  */
1062 U_STABLE int32_t U_EXPORT2
1063 uloc_minimizeSubtags(const char*    localeID,
1064          char* minimizedLocaleID,
1065          int32_t minimizedLocaleIDCapacity,
1066          UErrorCode* err);
1067
1068 /**
1069  * Returns a locale ID for the specified BCP47 language tag string.
1070  * If the specified language tag contains any ill-formed subtags,
1071  * the first such subtag and all following subtags are ignored.
1072  * <p>
1073  * This implements the 'Language-Tag' production of BCP47, and so
1074  * supports grandfathered (regular and irregular) as well as private
1075  * use language tags.  Private use tags are represented as 'x-whatever',
1076  * and grandfathered tags are converted to their canonical replacements
1077  * where they exist.  Note that a few grandfathered tags have no modern
1078  * replacement, these will be converted using the fallback described in
1079  * the first paragraph, so some information might be lost.
1080  * @param langtag   the input BCP47 language tag.
1081  * @param localeID  the output buffer receiving a locale ID for the
1082  *                  specified BCP47 language tag.
1083  * @param localeIDCapacity  the size of the locale ID output buffer.
1084  * @param parsedLength  if not NULL, succsessfully parsed length
1085  *                      for the input language tag is set.
1086  * @param err       error information if receiving the locald ID
1087  *                  failed.
1088  * @return          the length of the locale ID.
1089  * @draft ICU 4.2
1090  */
1091 U_DRAFT int32_t U_EXPORT2
1092 uloc_forLanguageTag(const char* langtag,
1093                     char* localeID,
1094                     int32_t localeIDCapacity,
1095                     int32_t* parsedLength,
1096                     UErrorCode* err);
1097
1098 /**
1099  * Returns a well-formed language tag for this locale ID.
1100  * <p>
1101  * <b>Note</b>: When <code>strict</code> is FALSE, any locale
1102  * fields which do not satisfy the BCP47 syntax requirement will
1103  * be omitted from the result.  When <code>strict</code> is
1104  * TRUE, this function sets U_ILLEGAL_ARGUMENT_ERROR to the
1105  * <code>err</code> if any locale fields do not satisfy the
1106  * BCP47 syntax requirement.
1107  * @param localeID  the input lcoale ID
1108  * @param langtag   the output buffer receiving BCP47 language
1109  *                  tag for the locale ID.
1110  * @param langtagCapacity   the size of the BCP47 language tag
1111  *                          output buffer.
1112  * @param strict    boolean value indicating if the function returns
1113  *                  an error for an ill-formed input locale ID.
1114  * @param err       error information if receiving the language
1115  *                  tag failed.
1116  * @return          The length of the BCP47 language tag.
1117  * @draft ICU 4.2
1118  */
1119 U_DRAFT int32_t U_EXPORT2
1120 uloc_toLanguageTag(const char* localeID,
1121                    char* langtag,
1122                    int32_t langtagCapacity,
1123                    UBool strict,
1124                    UErrorCode* err);
1125
1126 #endif /*_ULOC*/