icuSources/common/unicode/platform.h

   1 /*
   2 ******************************************************************************
   3 *
   4 *   Copyright (C) 1997-2013, 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 <code>#define</code> 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  * Define some things so that they can be documented.
  55  * @internal
  56  */
  57 #ifdef U_IN_DOXYGEN
  58 /*
  59  * Problem: "platform.h:335: warning: documentation for unknown define U_HAVE_STD_STRING found." means that U_HAVE_STD_STRING is not documented.
  60  * Solution: #define any defines for non @internal API here, so that they are visible in the docs.  If you just set PREDEFINED in Doxyfile.in,  they won't be documented.
  61  */
  62
  63 /* None for now. */
  64 #endif
  65
  66 /**
  67  * \def U_PLATFORM
  68  * The U_PLATFORM macro defines the platform we're on.
  69  *
  70  * We used to define one different, value-less macro per platform.
  71  * That made it hard to know the set of relevant platforms and macros,
  72  * and hard to deal with variants of platforms.
  73  *
  74  * Starting with ICU 49, we define platforms as numeric macros,
  75  * with ranges of values for related platforms and their variants.
  76  * The U_PLATFORM macro is set to one of these values.
  77  *
  78  * Historical note from the Solaris Wikipedia article:
  79  * AT&T and Sun collaborated on a project to merge the most popular Unix variants
  80  * on the market at that time: BSD, System V, and Xenix.
  81  * This became Unix System V Release 4 (SVR4).
  82  *
  83  * @internal
  84  */
  85
  86 /** Unknown platform. @internal */
  87 #define U_PF_UNKNOWN 0
  88 /** Windows @internal */
  89 #define U_PF_WINDOWS 1000
  90 /** MinGW. Windows, calls to Win32 API, but using GNU gcc and binutils. @internal */
  91 #define U_PF_MINGW 1800
  92 /**
  93  * Cygwin. Windows, calls to cygwin1.dll for Posix functions,
  94  * using MSVC or GNU gcc and binutils.
  95  * @internal
  96  */
  97 #define U_PF_CYGWIN 1900
  98 /* Reserve 2000 for U_PF_UNIX? */
  99 /** HP-UX is based on UNIX System V. @internal */
 100 #define U_PF_HPUX 2100
 101 /** Solaris is a Unix operating system based on SVR4. @internal */
 102 #define U_PF_SOLARIS 2600
 103 /** BSD is a UNIX operating system derivative. @internal */
 104 #define U_PF_BSD 3000
 105 /** AIX is based on UNIX System V Releases and 4.3 BSD. @internal */
 106 #define U_PF_AIX 3100
 107 /** IRIX is based on UNIX System V with BSD extensions. @internal */
 108 #define U_PF_IRIX 3200
 109 /**
 110  * Darwin is a POSIX-compliant operating system, composed of code developed by Apple,
 111  * as well as code derived from NeXTSTEP, BSD, and other projects,
 112  * built around the Mach kernel.
 113  * Darwin forms the core set of components upon which Mac OS X, Apple TV, and iOS are based.
 114  * (Original description modified from WikiPedia.)
 115  * @internal
 116  */
 117 #define U_PF_DARWIN 3500
 118 /** iPhone OS (iOS) is a derivative of Mac OS X. @internal */
 119 #define U_PF_IPHONE 3550
 120 /** QNX is a commercial Unix-like real-time operating system related to BSD. @internal */
 121 #define U_PF_QNX 3700
 122 /** Linux is a Unix-like operating system. @internal */
 123 #define U_PF_LINUX 4000
 124 /** Android is based on Linux. @internal */
 125 #define U_PF_ANDROID 4050
 126 /** "Classic" Mac OS (1984-2001) @internal */
 127 #define U_PF_CLASSIC_MACOS 8000
 128 /** z/OS is the successor to OS/390 which was the successor to MVS. @internal */
 129 #define U_PF_OS390 9000
 130 /** "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal */
 131 #define U_PF_OS400 9400
 132
 133 #ifdef U_PLATFORM
 134     /* Use the predefined value. */
 135 #elif defined(__MINGW32__)
 136 #   define U_PLATFORM U_PF_MINGW
 137 #elif defined(__CYGWIN__)
 138 #   define U_PLATFORM U_PF_CYGWIN
 139 #elif defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
 140 #   define U_PLATFORM U_PF_WINDOWS
 141 #elif defined(__ANDROID__)
 142 #   define U_PLATFORM U_PF_ANDROID
 143     /* Android wchar_t support depends on the API level. */
 144 #   include <android/api-level.h>
 145 #elif defined(linux) || defined(__linux__) || defined(__linux)
 146 #   define U_PLATFORM U_PF_LINUX
 147 #elif defined(__APPLE__) && defined(__MACH__)
 148 #   include <TargetConditionals.h>
 149 #   if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE  /* variant of TARGET_OS_MAC */
 150 #       define U_PLATFORM U_PF_IPHONE
 151 #   else
 152 #       define U_PLATFORM U_PF_DARWIN
 153 #   endif
 154 #elif defined(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MirBSD__)
 155 #   define U_PLATFORM U_PF_BSD
 156 #elif defined(sun) || defined(__sun)
 157     /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
 158 #   define U_PLATFORM U_PF_SOLARIS
 159 #   if defined(__GNUC__)
 160         /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
 161          * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
 162          *  is included which does not include this header file.
 163          */
 164 #       include <sys/isa_defs.h>
 165 #   endif
 166 #elif defined(_AIX) || defined(__TOS_AIX__)
 167 #   define U_PLATFORM U_PF_AIX
 168 #elif defined(_hpux) || defined(hpux) || defined(__hpux)
 169 #   define U_PLATFORM U_PF_HPUX
 170 #elif defined(sgi) || defined(__sgi)
 171 #   define U_PLATFORM U_PF_IRIX
 172 #elif defined(macintosh)
 173 #   define U_PLATFORM U_PF_CLASSIC_MACOS
 174 #elif defined(__QNX__) || defined(__QNXNTO__)
 175 #   define U_PLATFORM U_PF_QNX
 176 #elif defined(__TOS_MVS__)
 177 #   define U_PLATFORM U_PF_OS390
 178 #elif defined(__OS400__) || defined(__TOS_OS400__)
 179 #   define U_PLATFORM U_PF_OS400
 180 #else
 181 #   define U_PLATFORM U_PF_UNKNOWN
 182 #endif
 183
 184 /**
 185  * \def CYGWINMSVC
 186  * Defined if this is Windows with Cygwin, but using MSVC rather than gcc.
 187  * Otherwise undefined.
 188  * @internal
 189  */
 190 /* Commented out because this is already set in mh-cygwin-msvc
 191 #if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER)
 192 #   define CYGWINMSVC
 193 #endif
 194 */
 195
 196 /**
 197  * \def U_PLATFORM_USES_ONLY_WIN32_API
 198  * Defines whether the platform uses only the Win32 API.
 199  * Set to 1 for Windows/MSVC and MinGW but not Cygwin.
 200  * @internal
 201  */
 202 #ifdef U_PLATFORM_USES_ONLY_WIN32_API
 203     /* Use the predefined value. */
 204 #elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) || defined(CYGWINMSVC)
 205 #   define U_PLATFORM_USES_ONLY_WIN32_API 1
 206 #else
 207     /* Cygwin implements POSIX. */
 208 #   define U_PLATFORM_USES_ONLY_WIN32_API 0
 209 #endif
 210
 211 /**
 212  * \def U_PLATFORM_HAS_WIN32_API
 213  * Defines whether the Win32 API is available on the platform.
 214  * Set to 1 for Windows/MSVC, MinGW and Cygwin.
 215  * @internal
 216  */
 217 #ifdef U_PLATFORM_HAS_WIN32_API
 218     /* Use the predefined value. */
 219 #elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
 220 #   define U_PLATFORM_HAS_WIN32_API 1
 221 #else
 222 #   define U_PLATFORM_HAS_WIN32_API 0
 223 #endif
 224
 225 /**
 226  * \def U_PLATFORM_IMPLEMENTS_POSIX
 227  * Defines whether the platform implements (most of) the POSIX API.
 228  * Set to 1 for Cygwin and most other platforms.
 229  * @internal
 230  */
 231 #ifdef U_PLATFORM_IMPLEMENTS_POSIX
 232     /* Use the predefined value. */
 233 #elif U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CLASSIC_MACOS
 234 #   define U_PLATFORM_IMPLEMENTS_POSIX 0
 235 #else
 236 #   define U_PLATFORM_IMPLEMENTS_POSIX 1
 237 #endif
 238
 239 /**
 240  * \def U_PLATFORM_IS_LINUX_BASED
 241  * Defines whether the platform is Linux or one of its derivatives.
 242  * @internal
 243  */
 244 #ifdef U_PLATFORM_IS_LINUX_BASED
 245     /* Use the predefined value. */
 246 #elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= U_PF_ANDROID
 247 #   define U_PLATFORM_IS_LINUX_BASED 1
 248 #else
 249 #   define U_PLATFORM_IS_LINUX_BASED 0
 250 #endif
 251
 252 /**
 253  * \def U_PLATFORM_IS_DARWIN_BASED
 254  * Defines whether the platform is Darwin or one of its derivatives.
 255  * @internal
 256  */
 257 #ifdef U_PLATFORM_IS_DARWIN_BASED
 258     /* Use the predefined value. */
 259 #elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE
 260 #   define U_PLATFORM_IS_DARWIN_BASED 1
 261 #else
 262 #   define U_PLATFORM_IS_DARWIN_BASED 0
 263 #endif
 264
 265 /**
 266  * \def U_HAVE_STDINT_H
 267  * Defines whether stdint.h is available. It is a C99 standard header.
 268  * We used to include inttypes.h which includes stdint.h but we usually do not need
 269  * the additional definitions from inttypes.h.
 270  * @internal
 271  */
 272 #ifdef U_HAVE_STDINT_H
 273     /* Use the predefined value. */
 274 #elif U_PLATFORM_USES_ONLY_WIN32_API
 275 #   if defined(__BORLANDC__) || U_PLATFORM == U_PF_MINGW || (defined(_MSC_VER) && _MSC_VER>=1600)
 276         /* Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. */
 277 #       define U_HAVE_STDINT_H 1
 278 #   else
 279 #       define U_HAVE_STDINT_H 0
 280 #   endif
 281 #elif U_PLATFORM == U_PF_SOLARIS
 282     /* Solaris has inttypes.h but not stdint.h. */
 283 #   define U_HAVE_STDINT_H 0
 284 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 285     /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
 286 #   define U_HAVE_STDINT_H 0
 287 #else
 288 #   define U_HAVE_STDINT_H 1
 289 #endif
 290
 291 /**
 292  * \def U_HAVE_INTTYPES_H
 293  * Defines whether inttypes.h is available. It is a C99 standard header.
 294  * We include inttypes.h where it is available but stdint.h is not.
 295  * @internal
 296  */
 297 #ifdef U_HAVE_INTTYPES_H
 298     /* Use the predefined value. */
 299 #elif U_PLATFORM == U_PF_SOLARIS
 300     /* Solaris has inttypes.h but not stdint.h. */
 301 #   define U_HAVE_INTTYPES_H 1
 302 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 303     /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
 304 #   define U_HAVE_INTTYPES_H 1
 305 #else
 306     /* Most platforms have both inttypes.h and stdint.h, or neither. */
 307 #   define U_HAVE_INTTYPES_H U_HAVE_STDINT_H
 308 #endif
 309
 310 /**
 311  * \def U_IOSTREAM_SOURCE
 312  * Defines what support for C++ streams is available.
 313  *
 314  * If U_IOSTREAM_SOURCE is set to 199711, then &lt;iostream&gt; is available
 315  * (the ISO/IEC C++ FDIS was published in November 1997), and then
 316  * one should qualify streams using the std namespace in ICU header
 317  * files.
 318  * Starting with ICU 49, this is the only supported version.
 319  *
 320  * If U_IOSTREAM_SOURCE is set to 198506, then &lt;iostream.h&gt; is
 321  * available instead (in June 1985 Stroustrup published
 322  * "An Extensible I/O Facility for C++" at the summer USENIX conference).
 323  * Starting with ICU 49, this version is not supported any more.
 324  *
 325  * If U_IOSTREAM_SOURCE is 0 (or any value less than 199711),
 326  * then C++ streams are not available and
 327  * support for them will be silently suppressed in ICU.
 328  *
 329  * @internal
 330  */
 331 #ifndef U_IOSTREAM_SOURCE
 332 #define U_IOSTREAM_SOURCE 199711
 333 #endif
 334
 335 /**
 336  * \def U_HAVE_STD_STRING
 337  * Defines whether the standard C++ (STL) &lt;string&gt; header is available.
 338  * @internal
 339  */
 340 #ifdef U_HAVE_STD_STRING
 341     /* Use the predefined value. */
 342 #else
 343 #   define U_HAVE_STD_STRING 1
 344 #endif
 345
 346 /*===========================================================================*/
 347 /** @{ Compiler and environment features                                     */
 348 /*===========================================================================*/
 349
 350 /**
 351  * \def U_GCC_MAJOR_MINOR
 352  * Indicates whether the compiler is gcc (test for != 0),
 353  * and if so, contains its major (times 100) and minor version numbers.
 354  * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0.
 355  *
 356  * For example, for testing for whether we have gcc, and whether it's 4.6 or higher,
 357  * use "#if U_GCC_MAJOR_MINOR >= 406".
 358  * @internal
 359  */
 360 #ifdef __GNUC__
 361 #   define U_GCC_MAJOR_MINOR (__GNUC__ * 100 + __GNUC_MINOR__)
 362 #else
 363 #   define U_GCC_MAJOR_MINOR 0
 364 #endif
 365
 366 /**
 367  * \def U_IS_BIG_ENDIAN
 368  * Determines the endianness of the platform.
 369  * @internal
 370  */
 371 #ifdef U_IS_BIG_ENDIAN
 372     /* Use the predefined value. */
 373 #elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
 374 #   define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
 375 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
 376     /* gcc */
 377 #   define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
 378 #elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
 379 #   define U_IS_BIG_ENDIAN 1
 380 #elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
 381 #   define U_IS_BIG_ENDIAN 0
 382 #elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400 || defined(__s390__) || defined(__s390x__)
 383     /* These platforms do not appear to predefine any endianness macros. */
 384 #   define U_IS_BIG_ENDIAN 1
 385 #elif defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0)
 386     /* HPPA do not appear to predefine any endianness macros. */
 387 #   define U_IS_BIG_ENDIAN 1
 388 #elif defined(sparc) || defined(__sparc) || defined(__sparc__)
 389     /* Some sparc based systems (e.g. Linux) do not predefine any endianness macros. */
 390 #   define U_IS_BIG_ENDIAN 1
 391 #else
 392 #   define U_IS_BIG_ENDIAN 0
 393 #endif
 394
 395 /**
 396  * \def U_HAVE_PLACEMENT_NEW
 397  * Determines whether to override placement new and delete for STL.
 398  * @stable ICU 2.6
 399  */
 400 #ifdef U_HAVE_PLACEMENT_NEW
 401     /* Use the predefined value. */
 402 #elif defined(__BORLANDC__)
 403 #   define U_HAVE_PLACEMENT_NEW 0
 404 #else
 405 #   define U_HAVE_PLACEMENT_NEW 1
 406 #endif
 407
 408 /**
 409  * \def U_HAVE_DEBUG_LOCATION_NEW
 410  * Define this to define the MFC debug version of the operator new.
 411  *
 412  * @stable ICU 3.4
 413  */
 414 #ifdef U_HAVE_DEBUG_LOCATION_NEW
 415     /* Use the predefined value. */
 416 #elif defined(_MSC_VER)
 417 #   define U_HAVE_DEBUG_LOCATION_NEW 1
 418 #else
 419 #   define U_HAVE_DEBUG_LOCATION_NEW 0
 420 #endif
 421
 422 /* Compatibility with non clang compilers */
 423 #ifndef __has_attribute
 424 #    define __has_attribute(x) 0
 425 #endif
 426
 427 /**
 428  * \def U_MALLOC_ATTR
 429  * Attribute to mark functions as malloc-like
 430  * @internal
 431  */
 432 #if defined(__GNUC__) && __GNUC__>=3
 433 #    define U_MALLOC_ATTR __attribute__ ((__malloc__))
 434 #else
 435 #    define U_MALLOC_ATTR
 436 #endif
 437
 438 /**
 439  * \def U_ALLOC_SIZE_ATTR
 440  * Attribute to specify the size of the allocated buffer for malloc-like functions
 441  * @internal
 442  */
 443 #if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || __has_attribute(alloc_size)
 444 #   define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X)))
 445 #   define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y)))
 446 #else
 447 #   define U_ALLOC_SIZE_ATTR(X)
 448 #   define U_ALLOC_SIZE_ATTR2(X,Y)
 449 #endif
 450
 451 /** @} */
 452
 453 /*===========================================================================*/
 454 /** @{ Character data types                                                  */
 455 /*===========================================================================*/
 456
 457 /**
 458  * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
 459  * @stable ICU 2.0
 460  */
 461 #define U_ASCII_FAMILY 0
 462
 463 /**
 464  * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
 465  * @stable ICU 2.0
 466  */
 467 #define U_EBCDIC_FAMILY 1
 468
 469 /**
 470  * \def U_CHARSET_FAMILY
 471  *
 472  * <p>These definitions allow to specify the encoding of text
 473  * in the char data type as defined by the platform and the compiler.
 474  * It is enough to determine the code point values of "invariant characters",
 475  * which are the ones shared by all encodings that are in use
 476  * on a given platform.</p>
 477  *
 478  * <p>Those "invariant characters" should be all the uppercase and lowercase
 479  * latin letters, the digits, the space, and "basic punctuation".
 480  * Also, '\\n', '\\r', '\\t' should be available.</p>
 481  *
 482  * <p>The list of "invariant characters" is:<br>
 483  * \code
 484  *    A-Z  a-z  0-9  SPACE  "  %  &amp;  '  (  )  *  +  ,  -  .  /  :  ;  <  =  >  ?  _
 485  * \endcode
 486  * <br>
 487  * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p>
 488  *
 489  * <p>This matches the IBM Syntactic Character Set (CS 640).</p>
 490  *
 491  * <p>In other words, all the graphic characters in 7-bit ASCII should
 492  * be safely accessible except the following:</p>
 493  *
 494  * \code
 495  *    '\' <backslash>
 496  *    '[' <left bracket>
 497  *    ']' <right bracket>
 498  *    '{' <left brace>
 499  *    '}' <right brace>
 500  *    '^' <circumflex>
 501  *    '~' <tilde>
 502  *    '!' <exclamation mark>
 503  *    '#' <number sign>
 504  *    '|' <vertical line>
 505  *    '$' <dollar sign>
 506  *    '@' <commercial at>
 507  *    '`' <grave accent>
 508  * \endcode
 509  * @stable ICU 2.0
 510  */
 511 #ifdef U_CHARSET_FAMILY
 512     /* Use the predefined value. */
 513 #elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
 514 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 515 #elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
 516 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 517 #else
 518 #   define U_CHARSET_FAMILY U_ASCII_FAMILY
 519 #endif
 520
 521 /**
 522  * \def U_CHARSET_IS_UTF8
 523  *
 524  * Hardcode the default charset to UTF-8.
 525  *
 526  * If this is set to 1, then
 527  * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
 528  *   contain UTF-8 text, regardless of what the system API uses
 529  * - some ICU code will use fast functions like u_strFromUTF8()
 530  *   rather than the more general and more heavy-weight conversion API (ucnv.h)
 531  * - ucnv_getDefaultName() always returns "UTF-8"
 532  * - ucnv_setDefaultName() is disabled and will not change the default charset
 533  * - static builds of ICU are smaller
 534  * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
 535  *   configuration option (see unicode/uconfig.h)
 536  * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
 537  *
 538  * @stable ICU 4.2
 539  * @see UCONFIG_NO_CONVERSION
 540  */
 541 #ifdef U_CHARSET_IS_UTF8
 542     /* Use the predefined value. */
 543 #elif U_PLATFORM == U_PF_ANDROID || U_PLATFORM_IS_DARWIN_BASED
 544 #   define U_CHARSET_IS_UTF8 1
 545 #else
 546 #   define U_CHARSET_IS_UTF8 0
 547 #endif
 548
 549 /** @} */
 550
 551 /*===========================================================================*/
 552 /** @{ Information about wchar support                                       */
 553 /*===========================================================================*/
 554
 555 /**
 556  * \def U_HAVE_WCHAR_H
 557  * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
 558  *
 559  * @stable ICU 2.0
 560  */
 561 #ifdef U_HAVE_WCHAR_H
 562     /* Use the predefined value. */
 563 #elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
 564     /*
 565      * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
 566      * The type and header existed, but the library functions did not work as expected.
 567      * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
 568      */
 569 #   define U_HAVE_WCHAR_H 0
 570 #else
 571 #   define U_HAVE_WCHAR_H 1
 572 #endif
 573
 574 /**
 575  * \def U_SIZEOF_WCHAR_T
 576  * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
 577  *
 578  * @stable ICU 2.0
 579  */
 580 #ifdef U_SIZEOF_WCHAR_T
 581     /* Use the predefined value. */
 582 #elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9) || U_PLATFORM == U_PF_CLASSIC_MACOS
 583     /*
 584      * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
 585      * Newer Mac OS X has size 4.
 586      */
 587 #   define U_SIZEOF_WCHAR_T 1
 588 #elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
 589 #   define U_SIZEOF_WCHAR_T 2
 590 #elif U_PLATFORM == U_PF_AIX
 591     /*
 592      * AIX 6.1 information, section "Wide character data representation":
 593      * "... the wchar_t datatype is 32-bit in the 64-bit environment and
 594      * 16-bit in the 32-bit environment."
 595      * and
 596      * "All locales use Unicode for their wide character code values (process code),
 597      * except the IBM-eucTW codeset."
 598      */
 599 #   ifdef __64BIT__
 600 #       define U_SIZEOF_WCHAR_T 4
 601 #   else
 602 #       define U_SIZEOF_WCHAR_T 2
 603 #   endif
 604 #elif U_PLATFORM == U_PF_OS390
 605     /*
 606      * z/OS V1R11 information center, section "LP64 | ILP32":
 607      * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
 608      * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
 609      */
 610 #   ifdef _LP64
 611 #       define U_SIZEOF_WCHAR_T 4
 612 #   else
 613 #       define U_SIZEOF_WCHAR_T 2
 614 #   endif
 615 #elif U_PLATFORM == U_PF_OS400
 616 #   if defined(__UTF32__)
 617         /*
 618          * LOCALETYPE(*LOCALEUTF) is specified.
 619          * Wide-character strings are in UTF-32,
 620          * narrow-character strings are in UTF-8.
 621          */
 622 #       define U_SIZEOF_WCHAR_T 4
 623 #   elif defined(__UCS2__)
 624         /*
 625          * LOCALETYPE(*LOCALEUCS2) is specified.
 626          * Wide-character strings are in UCS-2,
 627          * narrow-character strings are in EBCDIC.
 628          */
 629 #       define U_SIZEOF_WCHAR_T 2
 630 #else
 631         /*
 632          * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
 633          * Wide-character strings are in 16-bit EBCDIC,
 634          * narrow-character strings are in EBCDIC.
 635          */
 636 #       define U_SIZEOF_WCHAR_T 2
 637 #   endif
 638 #else
 639 #   define U_SIZEOF_WCHAR_T 4
 640 #endif
 641
 642 #ifndef U_HAVE_WCSCPY
 643 #define U_HAVE_WCSCPY U_HAVE_WCHAR_H
 644 #endif
 645
 646 /** @} */
 647
 648 /**
 649  * \def U_HAVE_CHAR16_T
 650  * Defines whether the char16_t type is available for UTF-16
 651  * and u"abc" UTF-16 string literals are supported.
 652  * This is a new standard type and standard string literal syntax in C++0x
 653  * but has been available in some compilers before.
 654  * @internal
 655  */
 656 #ifdef U_HAVE_CHAR16_T
 657     /* Use the predefined value. */
 658 #else
 659     /*
 660      * Notes:
 661      * Visual Studio 10 (_MSC_VER>=1600) defines char16_t but
 662      * does not support u"abc" string literals.
 663      * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
 664      * does not support u"abc" string literals.
 665      * C++11 and C11 require support for UTF-16 literals
 666      */
 667 #   if (defined(__cplusplus) && __cplusplus >= 201103L) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
 668 #       define U_HAVE_CHAR16_T 1
 669 #   else
 670 #       define U_HAVE_CHAR16_T 0
 671 #   endif
 672 #endif
 673
 674 /**
 675  * @{
 676  * \def U_DECLARE_UTF16
 677  * Do not use this macro because it is not defined on all platforms.
 678  * Use the UNICODE_STRING or U_STRING_DECL macros instead.
 679  * @internal
 680  */
 681 #ifdef U_DECLARE_UTF16
 682     /* Use the predefined value. */
 683 #elif U_HAVE_CHAR16_T \
 684     || (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
 685     || (defined(__HP_aCC) && __HP_aCC >= 035000) \
 686     || (defined(__HP_cc) && __HP_cc >= 111106)
 687 #   define U_DECLARE_UTF16(string) u ## string
 688 #elif U_SIZEOF_WCHAR_T == 2 \
 689     && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
 690 #   define U_DECLARE_UTF16(string) L ## string
 691 #else
 692     /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
 693 #endif
 694
 695 /** @} */
 696
 697 /*===========================================================================*/
 698 /** @{ Symbol import-export control                                          */
 699 /*===========================================================================*/
 700
 701 #ifdef U_EXPORT
 702     /* Use the predefined value. */
 703 #elif defined(U_STATIC_IMPLEMENTATION)
 704 #   define U_EXPORT
 705 #elif defined(__GNUC__)
 706 #   define U_EXPORT __attribute__((visibility("default")))
 707 #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
 708    || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550)
 709 #   define U_EXPORT __global
 710 /*#elif defined(__HP_aCC) || defined(__HP_cc)
 711 #   define U_EXPORT __declspec(dllexport)*/
 712 #elif defined(_MSC_VER)
 713 #   define U_EXPORT __declspec(dllexport)
 714 #else
 715 #   define U_EXPORT
 716 #endif
 717
 718 /* U_CALLCONV is releated to U_EXPORT2 */
 719 #ifdef U_EXPORT2
 720     /* Use the predefined value. */
 721 #elif defined(_MSC_VER)
 722 #   define U_EXPORT2 __cdecl
 723 #else
 724 #   define U_EXPORT2
 725 #endif
 726
 727 #ifdef U_IMPORT
 728     /* Use the predefined value. */
 729 #elif defined(_MSC_VER)
 730     /* Windows needs to export/import data. */
 731 #   define U_IMPORT __declspec(dllimport)
 732 #else
 733 #   define U_IMPORT
 734 #endif
 735
 736 /**
 737  * \def U_CALLCONV
 738  * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
 739  * in callback function typedefs to make sure that the calling convention
 740  * is compatible.
 741  *
 742  * This is only used for non-ICU-API functions.
 743  * When a function is a public ICU API,
 744  * you must use the U_CAPI and U_EXPORT2 qualifiers.
 745  * @stable ICU 2.0
 746  */
 747 #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
 748 #    define U_CALLCONV __cdecl
 749 #else
 750 #    define U_CALLCONV U_EXPORT2
 751 #endif
 752
 753 /* @} */
 754
 755 #endif