icuSources/common/unicode/platform.h

   1 /*
   2 ******************************************************************************
   3 *
   4 *   Copyright (C) 1997-2012, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 ******************************************************************************
   8 *
   9 *  FILE NAME : platform.h
  10 *
  11 *   Date        Name        Description
  12 *   05/13/98    nos         Creation (content moved here from ptypes.h).
  13 *   03/02/99    stephen     Added AS400 support.
  14 *   03/30/99    stephen     Added Linux support.
  15 *   04/13/99    stephen     Reworked for autoconf.
  16 ******************************************************************************
  17 */
  18
  19 #ifndef _PLATFORM_H
  20 #define _PLATFORM_H
  21
  22 #include "unicode/uconfig.h"
  23 #include "unicode/uvernum.h"
  24
  25 /**
  26  * \file
  27  * \brief Basic types for the platform.
  28  *
  29  * This file used to be generated by autoconf/configure.
  30  * Starting with ICU 49, platform.h is a normal source file,
  31  * to simplify cross-compiling and working with non-autoconf/make build systems.
  32  *
  33  * When a value in this file does not work on a platform, then please
  34  * try to derive it from the U_PLATFORM value
  35  * (for which we might need a new value constant in rare cases)
  36  * and/or from other macros that are predefined by the compiler
  37  * or defined in standard (POSIX or platform or compiler) headers.
  38  *
  39  * As a temporary workaround, you can add an explicit #define for some macros
  40  * before it is first tested, or add an equivalent -D macro definition
  41  * to the compiler's command line.
  42  *
  43  * Note: Some compilers provide ways to show the predefined macros.
  44  * For example, with gcc you can compile an empty .c file and have the compiler
  45  * print the predefined macros with
  46  * \code
  47  * gcc -E -dM -x c /dev/null | sort
  48  * \endcode
  49  * (You can provide an actual empty .c file rather than /dev/null.
  50  * <code>-x c++</code> is for C++.)
  51  */
  52
  53 /**
  54  * \def U_PLATFORM
  55  * The U_PLATFORM macro defines the platform we're on.
  56  *
  57  * We used to define one different, value-less macro per platform.
  58  * That made it hard to know the set of relevant platforms and macros,
  59  * and hard to deal with variants of platforms.
  60  *
  61  * Starting with ICU 49, we define platforms as numeric macros,
  62  * with ranges of values for related platforms and their variants.
  63  * The U_PLATFORM macro is set to one of these values.
  64  *
  65  * Historical note from the Solaris Wikipedia article:
  66  * AT&T and Sun collaborated on a project to merge the most popular Unix variants
  67  * on the market at that time: BSD, System V, and Xenix.
  68  * This became Unix System V Release 4 (SVR4).
  69  *
  70  * @internal
  71  */
  72
  73 /** Unknown platform. @internal */
  74 #define U_PF_UNKNOWN 0
  75 /** Windows @internal */
  76 #define U_PF_WINDOWS 1000
  77 /** MinGW. Windows, calls to Win32 API, but using GNU gcc and binutils. @internal */
  78 #define U_PF_MINGW 1800
  79 /**
  80  * Cygwin. Windows, calls to cygwin1.dll for Posix functions,
  81  * using MSVC or GNU gcc and binutils.
  82  * @internal
  83  */
  84 #define U_PF_CYGWIN 1900
  85 /* Reserve 2000 for U_PF_UNIX? */
  86 /** HP-UX is based on UNIX System V. @internal */
  87 #define U_PF_HPUX 2100
  88 /** Solaris is a Unix operating system based on SVR4. @internal */
  89 #define U_PF_SOLARIS 2600
  90 /** BSD is a UNIX operating system derivative. @internal */
  91 #define U_PF_BSD 3000
  92 /** AIX is based on UNIX System V Releases and 4.3 BSD. @internal */
  93 #define U_PF_AIX 3100
  94 /** IRIX is based on UNIX System V with BSD extensions. @internal */
  95 #define U_PF_IRIX 3200
  96 /**
  97  * Darwin is a POSIX-compliant operating system, composed of code developed by Apple,
  98  * as well as code derived from NeXTSTEP, BSD, and other projects,
  99  * built around the Mach kernel.
 100  * Darwin forms the core set of components upon which Mac OS X, Apple TV, and iOS are based.
 101  * (Original description modified from WikiPedia.)
 102  * @internal
 103  */
 104 #define U_PF_DARWIN 3500
 105 /** iPhone OS (iOS) is a derivative of Mac OS X. @internal */
 106 #define U_PF_IPHONE 3550
 107 /** QNX is a commercial Unix-like real-time operating system related to BSD. @internal */
 108 #define U_PF_QNX 3700
 109 /** Linux is a Unix-like operating system. @internal */
 110 #define U_PF_LINUX 4000
 111 /** Android is based on Linux. @internal */
 112 #define U_PF_ANDROID 4050
 113 /** "Classic" Mac OS (1984-2001) @internal */
 114 #define U_PF_CLASSIC_MACOS 8000
 115 /** z/OS is the successor to OS/390 which was the successor to MVS. @internal */
 116 #define U_PF_OS390 9000
 117 /** "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal */
 118 #define U_PF_OS400 9400
 119
 120 #ifdef U_PLATFORM
 121     /* Use the predefined value. */
 122 #elif defined(__MINGW32__)
 123 #   define U_PLATFORM U_PF_MINGW
 124 #elif defined(__CYGWIN__)
 125 #   define U_PLATFORM U_PF_CYGWIN
 126 #elif defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
 127 #   define U_PLATFORM U_PF_WINDOWS
 128 #elif defined(__ANDROID__)
 129 #   define U_PLATFORM U_PF_ANDROID
 130     /* Android wchar_t support depends on the API level. */
 131 #   include <android/api-level.h>
 132 #elif defined(linux) || defined(__linux__) || defined(__linux)
 133 #   define U_PLATFORM U_PF_LINUX
 134 #elif defined(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 135 #   define U_PLATFORM U_PF_BSD
 136 #elif defined(sun) || defined(__sun)
 137     /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
 138 #   define U_PLATFORM U_PF_SOLARIS
 139 #   if defined(__GNUC__)
 140         /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
 141          * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
 142          *  is included which does not include this header file.
 143          */
 144 #       include <sys/isa_defs.h>
 145 #   endif
 146 #elif defined(_AIX) || defined(__TOS_AIX__)
 147 #   define U_PLATFORM U_PF_AIX
 148 #elif defined(_hpux) || defined(hpux) || defined(__hpux)
 149 #   define U_PLATFORM U_PF_HPUX
 150 #elif defined(sgi) || defined(__sgi)
 151 #   define U_PLATFORM U_PF_IRIX
 152 #elif defined(__APPLE__) && defined(__MACH__)
 153 #   include <TargetConditionals.h>
 154 #   if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE  /* variant of TARGET_OS_MAC */
 155 #       define U_PLATFORM U_PF_IPHONE
 156 #   else
 157 #       define U_PLATFORM U_PF_DARWIN
 158 #   endif
 159 #elif defined(macintosh)
 160 #   define U_PLATFORM U_PF_CLASSIC_MACOS
 161 #elif defined(__QNX__) || defined(__QNXNTO__)
 162 #   define U_PLATFORM U_PF_QNX
 163 #elif defined(__TOS_MVS__)
 164 #   define U_PLATFORM U_PF_OS390
 165 #elif defined(__OS400__) || defined(__TOS_OS400__)
 166 #   define U_PLATFORM U_PF_OS400
 167 #else
 168 #   define U_PLATFORM U_PF_UNKNOWN
 169 #endif
 170
 171 /**
 172  * \def CYGWINMSVC
 173  * Defined if this is Windows with Cygwin, but using MSVC rather than gcc.
 174  * Otherwise undefined.
 175  * @internal
 176  */
 177 /* Commented out because this is already set in mh-cygwin-msvc
 178 #if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER)
 179 #   define CYGWINMSVC
 180 #endif
 181 */
 182
 183 /**
 184  * \def U_PLATFORM_USES_ONLY_WIN32_API
 185  * Defines whether the platform uses only the Win32 API.
 186  * Set to 1 for Windows/MSVC and MinGW but not Cygwin.
 187  * @internal
 188  */
 189 #ifdef U_PLATFORM_USES_ONLY_WIN32_API
 190     /* Use the predefined value. */
 191 #elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) || defined(CYGWINMSVC)
 192 #   define U_PLATFORM_USES_ONLY_WIN32_API 1
 193 #else
 194     /* Cygwin implements POSIX. */
 195 #   define U_PLATFORM_USES_ONLY_WIN32_API 0
 196 #endif
 197
 198 /**
 199  * \def U_PLATFORM_HAS_WIN32_API
 200  * Defines whether the Win32 API is available on the platform.
 201  * Set to 1 for Windows/MSVC, MinGW and Cygwin.
 202  * @internal
 203  */
 204 #ifdef U_PLATFORM_HAS_WIN32_API
 205     /* Use the predefined value. */
 206 #elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
 207 #   define U_PLATFORM_HAS_WIN32_API 1
 208 #else
 209 #   define U_PLATFORM_HAS_WIN32_API 0
 210 #endif
 211
 212 /**
 213  * \def U_PLATFORM_IMPLEMENTS_POSIX
 214  * Defines whether the platform implements (most of) the POSIX API.
 215  * Set to 1 for Cygwin and most other platforms.
 216  * @internal
 217  */
 218 #ifdef U_PLATFORM_IMPLEMENTS_POSIX
 219     /* Use the predefined value. */
 220 #elif U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CLASSIC_MACOS
 221 #   define U_PLATFORM_IMPLEMENTS_POSIX 0
 222 #else
 223 #   define U_PLATFORM_IMPLEMENTS_POSIX 1
 224 #endif
 225
 226 /**
 227  * \def U_PLATFORM_IS_LINUX_BASED
 228  * Defines whether the platform is Linux or one of its derivatives.
 229  * @internal
 230  */
 231 #ifdef U_PLATFORM_IS_LINUX_BASED
 232     /* Use the predefined value. */
 233 #elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= U_PF_ANDROID
 234 #   define U_PLATFORM_IS_LINUX_BASED 1
 235 #else
 236 #   define U_PLATFORM_IS_LINUX_BASED 0
 237 #endif
 238
 239 /**
 240  * \def U_PLATFORM_IS_DARWIN_BASED
 241  * Defines whether the platform is Darwin or one of its derivatives.
 242  * @internal
 243  */
 244 #ifdef U_PLATFORM_IS_DARWIN_BASED
 245     /* Use the predefined value. */
 246 #elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE
 247 #   define U_PLATFORM_IS_DARWIN_BASED 1
 248 #else
 249 #   define U_PLATFORM_IS_DARWIN_BASED 0
 250 #endif
 251
 252 /**
 253  * \def U_HAVE_STDINT_H
 254  * Defines whether stdint.h is available. It is a C99 standard header.
 255  * We used to include inttypes.h which includes stdint.h but we usually do not need
 256  * the additional definitions from inttypes.h.
 257  * @internal
 258  */
 259 #ifdef U_HAVE_STDINT_H
 260     /* Use the predefined value. */
 261 #elif U_PLATFORM_USES_ONLY_WIN32_API
 262 #   if defined(__BORLANDC__) || (defined(_MSC_VER) && _MSC_VER>=1600)
 263         /* Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. */
 264 #       define U_HAVE_STDINT_H 1
 265 #   else
 266 #       define U_HAVE_STDINT_H 0
 267 #   endif
 268 #elif U_PLATFORM == U_PF_SOLARIS
 269     /* Solaris has inttypes.h but not stdint.h. */
 270 #   define U_HAVE_STDINT_H 0
 271 #else
 272 #   define U_HAVE_STDINT_H 1
 273 #endif
 274
 275 /**
 276  * \def U_HAVE_INTTYPES_H
 277  * Defines whether inttypes.h is available. It is a C99 standard header.
 278  * We include inttypes.h where it is available but stdint.h is not.
 279  * @internal
 280  */
 281 #ifdef U_HAVE_INTTYPES_H
 282     /* Use the predefined value. */
 283 #elif U_PLATFORM == U_PF_SOLARIS
 284     /* Solaris has inttypes.h but not stdint.h. */
 285 #   define U_HAVE_INTTYPES_H 1
 286 #else
 287     /* Most platforms have both inttypes.h and stdint.h, or neither. */
 288 #   define U_HAVE_INTTYPES_H U_HAVE_STDINT_H
 289 #endif
 290
 291 /**
 292  * \def U_IOSTREAM_SOURCE
 293  * Defines what support for C++ streams is available.
 294  *
 295  * If U_IOSTREAM_SOURCE is set to 199711, then &lt;iostream&gt; is available
 296  * (the ISO/IEC C++ FDIS was published in November 1997), and then
 297  * one should qualify streams using the std namespace in ICU header
 298  * files.
 299  * Starting with ICU 49, this is the only supported version.
 300  *
 301  * If U_IOSTREAM_SOURCE is set to 198506, then &lt;iostream.h&gt; is
 302  * available instead (in June 1985 Stroustrup published
 303  * "An Extensible I/O Facility for C++" at the summer USENIX conference).
 304  * Starting with ICU 49, this version is not supported any more.
 305  *
 306  * If U_IOSTREAM_SOURCE is 0 (or any value less than 199711),
 307  * then C++ streams are not available and
 308  * support for them will be silently suppressed in ICU.
 309  *
 310  * @internal
 311  */
 312 #ifndef U_IOSTREAM_SOURCE
 313 #define U_IOSTREAM_SOURCE 199711
 314 #endif
 315
 316 /**
 317  * \def U_HAVE_STD_STRING
 318  * Defines whether the standard C++ (STL) &lt;string&gt; header is available.
 319  * @internal
 320  */
 321 #ifdef U_HAVE_STD_STRING
 322     /* Use the predefined value. */
 323 #elif U_PLATFORM == U_PF_ANDROID
 324 #   define U_HAVE_STD_STRING 0
 325 #else
 326 #   define U_HAVE_STD_STRING 1
 327 #endif
 328
 329 /*===========================================================================*/
 330 /** @{ Compiler and environment features                                     */
 331 /*===========================================================================*/
 332
 333 /**
 334  * \def U_IS_BIG_ENDIAN
 335  * Determines the endianness of the platform.
 336  * @internal
 337  */
 338 #ifdef U_IS_BIG_ENDIAN
 339     /* Use the predefined value. */
 340 #elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
 341 #   define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
 342 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
 343     /* gcc */
 344 #   define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
 345 #elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
 346 #   define U_IS_BIG_ENDIAN 1
 347 #elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
 348 #   define U_IS_BIG_ENDIAN 0
 349 #elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400
 350     /* These platforms do not appear to predefine any endianness macros. */
 351 #   define U_IS_BIG_ENDIAN 1
 352 #else
 353 #   define U_IS_BIG_ENDIAN 0
 354 #endif
 355
 356 /**
 357  * \def U_HAVE_PLACEMENT_NEW
 358  * Determines whether to override placement new and delete for STL.
 359  * @stable ICU 2.6
 360  */
 361 #ifdef U_HAVE_PLACEMENT_NEW
 362     /* Use the predefined value. */
 363 #elif defined(__BORLANDC__)
 364 #   define U_HAVE_PLACEMENT_NEW 0
 365 #else
 366 #   define U_HAVE_PLACEMENT_NEW 1
 367 #endif
 368
 369 /**
 370  * \def U_HAVE_DEBUG_LOCATION_NEW
 371  * Define this to define the MFC debug version of the operator new.
 372  *
 373  * @stable ICU 3.4
 374  */
 375 #ifdef U_HAVE_DEBUG_LOCATION_NEW
 376     /* Use the predefined value. */
 377 #elif defined(_MSC_VER)
 378 #   define U_HAVE_DEBUG_LOCATION_NEW 1
 379 #else
 380 #   define U_HAVE_DEBUG_LOCATION_NEW 0
 381 #endif
 382
 383 /** @} */
 384
 385 /*===========================================================================*/
 386 /** @{ Character data types                                                  */
 387 /*===========================================================================*/
 388
 389 /**
 390  * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
 391  * @stable ICU 2.0
 392  */
 393 #define U_ASCII_FAMILY 0
 394
 395 /**
 396  * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
 397  * @stable ICU 2.0
 398  */
 399 #define U_EBCDIC_FAMILY 1
 400
 401 /**
 402  * \def U_CHARSET_FAMILY
 403  *
 404  * <p>These definitions allow to specify the encoding of text
 405  * in the char data type as defined by the platform and the compiler.
 406  * It is enough to determine the code point values of "invariant characters",
 407  * which are the ones shared by all encodings that are in use
 408  * on a given platform.</p>
 409  *
 410  * <p>Those "invariant characters" should be all the uppercase and lowercase
 411  * latin letters, the digits, the space, and "basic punctuation".
 412  * Also, '\\n', '\\r', '\\t' should be available.</p>
 413  *
 414  * <p>The list of "invariant characters" is:<br>
 415  * \code
 416  *    A-Z  a-z  0-9  SPACE  "  %  &amp;  '  (  )  *  +  ,  -  .  /  :  ;  <  =  >  ?  _
 417  * \endcode
 418  * <br>
 419  * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p>
 420  *
 421  * <p>This matches the IBM Syntactic Character Set (CS 640).</p>
 422  *
 423  * <p>In other words, all the graphic characters in 7-bit ASCII should
 424  * be safely accessible except the following:</p>
 425  *
 426  * \code
 427  *    '\' <backslash>
 428  *    '[' <left bracket>
 429  *    ']' <right bracket>
 430  *    '{' <left brace>
 431  *    '}' <right brace>
 432  *    '^' <circumflex>
 433  *    '~' <tilde>
 434  *    '!' <exclamation mark>
 435  *    '#' <number sign>
 436  *    '|' <vertical line>
 437  *    '$' <dollar sign>
 438  *    '@' <commercial at>
 439  *    '`' <grave accent>
 440  * \endcode
 441  * @stable ICU 2.0
 442  */
 443 #ifdef U_CHARSET_FAMILY
 444     /* Use the predefined value. */
 445 #elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
 446 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 447 #elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
 448 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 449 #else
 450 #   define U_CHARSET_FAMILY U_ASCII_FAMILY
 451 #endif
 452
 453 /**
 454  * \def U_CHARSET_IS_UTF8
 455  *
 456  * Hardcode the default charset to UTF-8.
 457  *
 458  * If this is set to 1, then
 459  * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
 460  *   contain UTF-8 text, regardless of what the system API uses
 461  * - some ICU code will use fast functions like u_strFromUTF8()
 462  *   rather than the more general and more heavy-weight conversion API (ucnv.h)
 463  * - ucnv_getDefaultName() always returns "UTF-8"
 464  * - ucnv_setDefaultName() is disabled and will not change the default charset
 465  * - static builds of ICU are smaller
 466  * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
 467  *   configuration option (see unicode/uconfig.h)
 468  * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
 469  *
 470  * @stable ICU 4.2
 471  * @see UCONFIG_NO_CONVERSION
 472  */
 473 #ifdef U_CHARSET_IS_UTF8
 474     /* Use the predefined value. */
 475 #elif U_PLATFORM == U_PF_ANDROID || U_PLATFORM_IS_DARWIN_BASED
 476 #   define U_CHARSET_IS_UTF8 1
 477 #else
 478 #   define U_CHARSET_IS_UTF8 0
 479 #endif
 480
 481 /** @} */
 482
 483 /*===========================================================================*/
 484 /** @{ Information about wchar support                                       */
 485 /*===========================================================================*/
 486
 487 /**
 488  * \def U_HAVE_WCHAR_H
 489  * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
 490  *
 491  * @stable ICU 2.0
 492  */
 493 #ifdef U_HAVE_WCHAR_H
 494     /* Use the predefined value. */
 495 #elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
 496     /*
 497      * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
 498      * The type and header existed, but the library functions did not work as expected.
 499      * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
 500      */
 501 #   define U_HAVE_WCHAR_H 0
 502 #else
 503 #   define U_HAVE_WCHAR_H 1
 504 #endif
 505
 506 /**
 507  * \def U_SIZEOF_WCHAR_T
 508  * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
 509  *
 510  * @stable ICU 2.0
 511  */
 512 #ifdef U_SIZEOF_WCHAR_T
 513     /* Use the predefined value. */
 514 #elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9) || U_PLATFORM == U_PF_CLASSIC_MACOS
 515     /*
 516      * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
 517      * Newer Mac OS X has size 4.
 518      */
 519 #   define U_SIZEOF_WCHAR_T 1
 520 #elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
 521 #   define U_SIZEOF_WCHAR_T 2
 522 #elif U_PLATFORM == U_PF_AIX
 523     /*
 524      * AIX 6.1 information, section "Wide character data representation":
 525      * "... the wchar_t datatype is 32-bit in the 64-bit environment and
 526      * 16-bit in the 32-bit environment."
 527      * and
 528      * "All locales use Unicode for their wide character code values (process code),
 529      * except the IBM-eucTW codeset."
 530      */
 531 #   ifdef __64BIT__
 532 #       define U_SIZEOF_WCHAR_T 4
 533 #   else
 534 #       define U_SIZEOF_WCHAR_T 2
 535 #   endif
 536 #elif U_PLATFORM == U_PF_OS390
 537     /*
 538      * z/OS V1R11 information center, section "LP64 | ILP32":
 539      * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
 540      * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
 541      */
 542 #   ifdef _LP64
 543 #       define U_SIZEOF_WCHAR_T 4
 544 #   else
 545 #       define U_SIZEOF_WCHAR_T 2
 546 #   endif
 547 #elif U_PLATFORM == U_PF_OS400
 548 #   if defined(__UTF32__)
 549         /*
 550          * LOCALETYPE(*LOCALEUTF) is specified.
 551          * Wide-character strings are in UTF-32,
 552          * narrow-character strings are in UTF-8.
 553          */
 554 #       define U_SIZEOF_WCHAR_T 4
 555 #   elif defined(__UCS2__)
 556         /*
 557          * LOCALETYPE(*LOCALEUCS2) is specified.
 558          * Wide-character strings are in UCS-2,
 559          * narrow-character strings are in EBCDIC.
 560          */
 561 #       define U_SIZEOF_WCHAR_T 2
 562 #else
 563         /*
 564          * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
 565          * Wide-character strings are in 16-bit EBCDIC,
 566          * narrow-character strings are in EBCDIC.
 567          */
 568 #       define U_SIZEOF_WCHAR_T 2
 569 #   endif
 570 #else
 571 #   define U_SIZEOF_WCHAR_T 4
 572 #endif
 573
 574 #ifndef U_HAVE_WCSCPY
 575 #define U_HAVE_WCSCPY U_HAVE_WCHAR_H
 576 #endif
 577
 578 /** @} */
 579
 580 /**
 581  * \def U_HAVE_CHAR16_T
 582  * Defines whether the char16_t type is available for UTF-16
 583  * and u"abc" UTF-16 string literals are supported.
 584  * This is a new standard type and standard string literal syntax in C++0x
 585  * but has been available in some compilers before.
 586  * @internal
 587  */
 588 #ifdef U_HAVE_CHAR16_T
 589     /* Use the predefined value. */
 590 #else
 591     /*
 592      * Notes:
 593      * Visual Studio 10 (_MSC_VER>=1600) defines char16_t but
 594      * does not support u"abc" string literals.
 595      * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
 596      * does not support u"abc" string literals.
 597      */
 598 #   define U_HAVE_CHAR16_T 0
 599 #endif
 600
 601 /**
 602  * @{
 603  * \def U_DECLARE_UTF16
 604  * Do not use this macro because it is not defined on all platforms.
 605  * Use the UNICODE_STRING or U_STRING_DECL macros instead.
 606  * @internal
 607  */
 608 #ifdef U_DECLARE_UTF16
 609     /* Use the predefined value. */
 610 #elif (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
 611     || (defined(__HP_aCC) && __HP_aCC >= 035000) \
 612     || (defined(__HP_cc) && __HP_cc >= 111106) \
 613     || U_HAVE_CHAR16_T
 614 #   define U_DECLARE_UTF16(string) u ## string
 615 #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550)
 616 /* || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x580) */
 617 /* Sun's C compiler has issues with this notation, and it's unreliable. */
 618 #   define U_DECLARE_UTF16(string) U ## string
 619 #elif U_SIZEOF_WCHAR_T == 2 \
 620     && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
 621 #   define U_DECLARE_UTF16(string) L ## string
 622 #else
 623     /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
 624 #endif
 625
 626 /** @} */
 627
 628 /*===========================================================================*/
 629 /** @{ Symbol import-export control                                          */
 630 /*===========================================================================*/
 631
 632 #ifdef U_EXPORT
 633     /* Use the predefined value. */
 634 #elif defined(U_STATIC_IMPLEMENTATION)
 635 #   define U_EXPORT
 636 #elif defined(__GNUC__)
 637 #   define U_EXPORT __attribute__((visibility("default")))
 638 #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
 639    || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550)
 640 #   define U_EXPORT __global
 641 /*#elif defined(__HP_aCC) || defined(__HP_cc)
 642 #   define U_EXPORT __declspec(dllexport)*/
 643 #elif defined(_MSC_VER)
 644 #   define U_EXPORT __declspec(dllexport)
 645 #else
 646 #   define U_EXPORT
 647 #endif
 648
 649 /* U_CALLCONV is releated to U_EXPORT2 */
 650 #ifdef U_EXPORT2
 651     /* Use the predefined value. */
 652 #elif defined(_MSC_VER)
 653 #   define U_EXPORT2 __cdecl
 654 #else
 655 #   define U_EXPORT2
 656 #endif
 657
 658 #ifdef U_IMPORT
 659     /* Use the predefined value. */
 660 #elif defined(_MSC_VER)
 661     /* Windows needs to export/import data. */
 662 #   define U_IMPORT __declspec(dllimport)
 663 #else
 664 #   define U_IMPORT
 665 #endif
 666
 667 /**
 668  * \def U_CALLCONV
 669  * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
 670  * in callback function typedefs to make sure that the calling convention
 671  * is compatible.
 672  *
 673  * This is only used for non-ICU-API functions.
 674  * When a function is a public ICU API,
 675  * you must use the U_CAPI and U_EXPORT2 qualifiers.
 676  * @stable ICU 2.0
 677  */
 678 #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
 679 #    define U_CALLCONV __cdecl
 680 #else
 681 #    define U_CALLCONV U_EXPORT2
 682 #endif
 683
 684 /* @} */
 685
 686 #endif