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 <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(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MirBSD__)
 148 #   define U_PLATFORM U_PF_BSD
 149 #elif defined(sun) || defined(__sun)
 150     /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
 151 #   define U_PLATFORM U_PF_SOLARIS
 152 #   if defined(__GNUC__)
 153         /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
 154          * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
 155          *  is included which does not include this header file.
 156          */
 157 #       include <sys/isa_defs.h>
 158 #   endif
 159 #elif defined(_AIX) || defined(__TOS_AIX__)
 160 #   define U_PLATFORM U_PF_AIX
 161 #elif defined(_hpux) || defined(hpux) || defined(__hpux)
 162 #   define U_PLATFORM U_PF_HPUX
 163 #elif defined(sgi) || defined(__sgi)
 164 #   define U_PLATFORM U_PF_IRIX
 165 #elif defined(__APPLE__) && defined(__MACH__)
 166 #   include <TargetConditionals.h>
 167 #   if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE  /* variant of TARGET_OS_MAC */
 168 #       define U_PLATFORM U_PF_IPHONE
 169 #   else
 170 #       define U_PLATFORM U_PF_DARWIN
 171 #   endif
 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 #elif U_PLATFORM == U_PF_ANDROID
 343 #   define U_HAVE_STD_STRING 0
 344 #else
 345 #   define U_HAVE_STD_STRING 1
 346 #endif
 347
 348 /*===========================================================================*/
 349 /** @{ Compiler and environment features                                     */
 350 /*===========================================================================*/
 351
 352 /**
 353  * \def U_GCC_MAJOR_MINOR
 354  * Indicates whether the compiler is gcc (test for != 0),
 355  * and if so, contains its major (times 100) and minor version numbers.
 356  * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0.
 357  *
 358  * For example, for testing for whether we have gcc, and whether it's 4.6 or higher,
 359  * use "#if U_GCC_MAJOR_MINOR >= 406".
 360  * @internal
 361  */
 362 #ifdef __GNUC__
 363 #   define U_GCC_MAJOR_MINOR (__GNUC__ * 100 + __GNUC_MINOR__)
 364 #else
 365 #   define U_GCC_MAJOR_MINOR 0
 366 #endif
 367
 368 /**
 369  * \def U_IS_BIG_ENDIAN
 370  * Determines the endianness of the platform.
 371  * @internal
 372  */
 373 #ifdef U_IS_BIG_ENDIAN
 374     /* Use the predefined value. */
 375 #elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
 376 #   define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
 377 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
 378     /* gcc */
 379 #   define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
 380 #elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
 381 #   define U_IS_BIG_ENDIAN 1
 382 #elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
 383 #   define U_IS_BIG_ENDIAN 0
 384 #elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400 || defined(__s390__) || defined(__s390x__)
 385     /* These platforms do not appear to predefine any endianness macros. */
 386 #   define U_IS_BIG_ENDIAN 1
 387 #elif defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0)
 388     /* HPPA do not appear to predefine any endianness macros. */
 389 #   define U_IS_BIG_ENDIAN 1
 390 #elif defined(sparc) || defined(__sparc) || defined(__sparc__)
 391     /* Some sparc based systems (e.g. Linux) do not predefine any endianness macros. */
 392 #   define U_IS_BIG_ENDIAN 1
 393 #else
 394 #   define U_IS_BIG_ENDIAN 0
 395 #endif
 396
 397 /**
 398  * \def U_HAVE_PLACEMENT_NEW
 399  * Determines whether to override placement new and delete for STL.
 400  * @stable ICU 2.6
 401  */
 402 #ifdef U_HAVE_PLACEMENT_NEW
 403     /* Use the predefined value. */
 404 #elif defined(__BORLANDC__)
 405 #   define U_HAVE_PLACEMENT_NEW 0
 406 #else
 407 #   define U_HAVE_PLACEMENT_NEW 1
 408 #endif
 409
 410 /**
 411  * \def U_HAVE_DEBUG_LOCATION_NEW
 412  * Define this to define the MFC debug version of the operator new.
 413  *
 414  * @stable ICU 3.4
 415  */
 416 #ifdef U_HAVE_DEBUG_LOCATION_NEW
 417     /* Use the predefined value. */
 418 #elif defined(_MSC_VER)
 419 #   define U_HAVE_DEBUG_LOCATION_NEW 1
 420 #else
 421 #   define U_HAVE_DEBUG_LOCATION_NEW 0
 422 #endif
 423
 424 /* Compatibility with non clang compilers */
 425 #ifndef __has_attribute
 426 #    define __has_attribute(x) 0
 427 #endif
 428
 429 /**
 430  * \def U_MALLOC_ATTR
 431  * Attribute to mark functions as malloc-like
 432  * @internal
 433  */
 434 #if defined(__GNUC__) && __GNUC__>=3
 435 #    define U_MALLOC_ATTR __attribute__ ((__malloc__))
 436 #else
 437 #    define U_MALLOC_ATTR
 438 #endif
 439
 440 /**
 441  * \def U_ALLOC_SIZE_ATTR
 442  * Attribute to specify the size of the allocated buffer for malloc-like functions
 443  * @internal
 444  */
 445 #if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || __has_attribute(alloc_size)
 446 #   define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X)))
 447 #   define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y)))
 448 #else
 449 #   define U_ALLOC_SIZE_ATTR(X)
 450 #   define U_ALLOC_SIZE_ATTR2(X,Y)
 451 #endif
 452
 453 /** @} */
 454
 455 /*===========================================================================*/
 456 /** @{ Character data types                                                  */
 457 /*===========================================================================*/
 458
 459 /**
 460  * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
 461  * @stable ICU 2.0
 462  */
 463 #define U_ASCII_FAMILY 0
 464
 465 /**
 466  * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
 467  * @stable ICU 2.0
 468  */
 469 #define U_EBCDIC_FAMILY 1
 470
 471 /**
 472  * \def U_CHARSET_FAMILY
 473  *
 474  * <p>These definitions allow to specify the encoding of text
 475  * in the char data type as defined by the platform and the compiler.
 476  * It is enough to determine the code point values of "invariant characters",
 477  * which are the ones shared by all encodings that are in use
 478  * on a given platform.</p>
 479  *
 480  * <p>Those "invariant characters" should be all the uppercase and lowercase
 481  * latin letters, the digits, the space, and "basic punctuation".
 482  * Also, '\\n', '\\r', '\\t' should be available.</p>
 483  *
 484  * <p>The list of "invariant characters" is:<br>
 485  * \code
 486  *    A-Z  a-z  0-9  SPACE  "  %  &amp;  '  (  )  *  +  ,  -  .  /  :  ;  <  =  >  ?  _
 487  * \endcode
 488  * <br>
 489  * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p>
 490  *
 491  * <p>This matches the IBM Syntactic Character Set (CS 640).</p>
 492  *
 493  * <p>In other words, all the graphic characters in 7-bit ASCII should
 494  * be safely accessible except the following:</p>
 495  *
 496  * \code
 497  *    '\' <backslash>
 498  *    '[' <left bracket>
 499  *    ']' <right bracket>
 500  *    '{' <left brace>
 501  *    '}' <right brace>
 502  *    '^' <circumflex>
 503  *    '~' <tilde>
 504  *    '!' <exclamation mark>
 505  *    '#' <number sign>
 506  *    '|' <vertical line>
 507  *    '$' <dollar sign>
 508  *    '@' <commercial at>
 509  *    '`' <grave accent>
 510  * \endcode
 511  * @stable ICU 2.0
 512  */
 513 #ifdef U_CHARSET_FAMILY
 514     /* Use the predefined value. */
 515 #elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
 516 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 517 #elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
 518 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 519 #else
 520 #   define U_CHARSET_FAMILY U_ASCII_FAMILY
 521 #endif
 522
 523 /**
 524  * \def U_CHARSET_IS_UTF8
 525  *
 526  * Hardcode the default charset to UTF-8.
 527  *
 528  * If this is set to 1, then
 529  * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
 530  *   contain UTF-8 text, regardless of what the system API uses
 531  * - some ICU code will use fast functions like u_strFromUTF8()
 532  *   rather than the more general and more heavy-weight conversion API (ucnv.h)
 533  * - ucnv_getDefaultName() always returns "UTF-8"
 534  * - ucnv_setDefaultName() is disabled and will not change the default charset
 535  * - static builds of ICU are smaller
 536  * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
 537  *   configuration option (see unicode/uconfig.h)
 538  * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
 539  *
 540  * @stable ICU 4.2
 541  * @see UCONFIG_NO_CONVERSION
 542  */
 543 #ifdef U_CHARSET_IS_UTF8
 544     /* Use the predefined value. */
 545 #elif U_PLATFORM == U_PF_ANDROID || U_PLATFORM_IS_DARWIN_BASED
 546 #   define U_CHARSET_IS_UTF8 1
 547 #else
 548 #   define U_CHARSET_IS_UTF8 0
 549 #endif
 550
 551 /** @} */
 552
 553 /*===========================================================================*/
 554 /** @{ Information about wchar support                                       */
 555 /*===========================================================================*/
 556
 557 /**
 558  * \def U_HAVE_WCHAR_H
 559  * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
 560  *
 561  * @stable ICU 2.0
 562  */
 563 #ifdef U_HAVE_WCHAR_H
 564     /* Use the predefined value. */
 565 #elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
 566     /*
 567      * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
 568      * The type and header existed, but the library functions did not work as expected.
 569      * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
 570      */
 571 #   define U_HAVE_WCHAR_H 0
 572 #else
 573 #   define U_HAVE_WCHAR_H 1
 574 #endif
 575
 576 /**
 577  * \def U_SIZEOF_WCHAR_T
 578  * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
 579  *
 580  * @stable ICU 2.0
 581  */
 582 #ifdef U_SIZEOF_WCHAR_T
 583     /* Use the predefined value. */
 584 #elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9) || U_PLATFORM == U_PF_CLASSIC_MACOS
 585     /*
 586      * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
 587      * Newer Mac OS X has size 4.
 588      */
 589 #   define U_SIZEOF_WCHAR_T 1
 590 #elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
 591 #   define U_SIZEOF_WCHAR_T 2
 592 #elif U_PLATFORM == U_PF_AIX
 593     /*
 594      * AIX 6.1 information, section "Wide character data representation":
 595      * "... the wchar_t datatype is 32-bit in the 64-bit environment and
 596      * 16-bit in the 32-bit environment."
 597      * and
 598      * "All locales use Unicode for their wide character code values (process code),
 599      * except the IBM-eucTW codeset."
 600      */
 601 #   ifdef __64BIT__
 602 #       define U_SIZEOF_WCHAR_T 4
 603 #   else
 604 #       define U_SIZEOF_WCHAR_T 2
 605 #   endif
 606 #elif U_PLATFORM == U_PF_OS390
 607     /*
 608      * z/OS V1R11 information center, section "LP64 | ILP32":
 609      * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
 610      * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
 611      */
 612 #   ifdef _LP64
 613 #       define U_SIZEOF_WCHAR_T 4
 614 #   else
 615 #       define U_SIZEOF_WCHAR_T 2
 616 #   endif
 617 #elif U_PLATFORM == U_PF_OS400
 618 #   if defined(__UTF32__)
 619         /*
 620          * LOCALETYPE(*LOCALEUTF) is specified.
 621          * Wide-character strings are in UTF-32,
 622          * narrow-character strings are in UTF-8.
 623          */
 624 #       define U_SIZEOF_WCHAR_T 4
 625 #   elif defined(__UCS2__)
 626         /*
 627          * LOCALETYPE(*LOCALEUCS2) is specified.
 628          * Wide-character strings are in UCS-2,
 629          * narrow-character strings are in EBCDIC.
 630          */
 631 #       define U_SIZEOF_WCHAR_T 2
 632 #else
 633         /*
 634          * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
 635          * Wide-character strings are in 16-bit EBCDIC,
 636          * narrow-character strings are in EBCDIC.
 637          */
 638 #       define U_SIZEOF_WCHAR_T 2
 639 #   endif
 640 #else
 641 #   define U_SIZEOF_WCHAR_T 4
 642 #endif
 643
 644 #ifndef U_HAVE_WCSCPY
 645 #define U_HAVE_WCSCPY U_HAVE_WCHAR_H
 646 #endif
 647
 648 /** @} */
 649
 650 /**
 651  * \def U_HAVE_CHAR16_T
 652  * Defines whether the char16_t type is available for UTF-16
 653  * and u"abc" UTF-16 string literals are supported.
 654  * This is a new standard type and standard string literal syntax in C++0x
 655  * but has been available in some compilers before.
 656  * @internal
 657  */
 658 #ifdef U_HAVE_CHAR16_T
 659     /* Use the predefined value. */
 660 #else
 661     /*
 662      * Notes:
 663      * Visual Studio 10 (_MSC_VER>=1600) defines char16_t but
 664      * does not support u"abc" string literals.
 665      * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
 666      * does not support u"abc" string literals.
 667      * C++11 and C11 require support for UTF-16 literals
 668      */
 669 #   if (defined(__cplusplus) && __cplusplus >= 201103L) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
 670 #       define U_HAVE_CHAR16_T 1
 671 #   else
 672 #       define U_HAVE_CHAR16_T 0
 673 #   endif
 674 #endif
 675
 676 /**
 677  * @{
 678  * \def U_DECLARE_UTF16
 679  * Do not use this macro because it is not defined on all platforms.
 680  * Use the UNICODE_STRING or U_STRING_DECL macros instead.
 681  * @internal
 682  */
 683 #ifdef U_DECLARE_UTF16
 684     /* Use the predefined value. */
 685 #elif U_HAVE_CHAR16_T \
 686     || (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
 687     || (defined(__HP_aCC) && __HP_aCC >= 035000) \
 688     || (defined(__HP_cc) && __HP_cc >= 111106)
 689 #   define U_DECLARE_UTF16(string) u ## string
 690 #elif U_SIZEOF_WCHAR_T == 2 \
 691     && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
 692 #   define U_DECLARE_UTF16(string) L ## string
 693 #else
 694     /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
 695 #endif
 696
 697 /** @} */
 698
 699 /*===========================================================================*/
 700 /** @{ Symbol import-export control                                          */
 701 /*===========================================================================*/
 702
 703 #ifdef U_EXPORT
 704     /* Use the predefined value. */
 705 #elif defined(U_STATIC_IMPLEMENTATION)
 706 #   define U_EXPORT
 707 #elif defined(__GNUC__)
 708 #   define U_EXPORT __attribute__((visibility("default")))
 709 #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
 710    || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550)
 711 #   define U_EXPORT __global
 712 /*#elif defined(__HP_aCC) || defined(__HP_cc)
 713 #   define U_EXPORT __declspec(dllexport)*/
 714 #elif defined(_MSC_VER)
 715 #   define U_EXPORT __declspec(dllexport)
 716 #else
 717 #   define U_EXPORT
 718 #endif
 719
 720 /* U_CALLCONV is releated to U_EXPORT2 */
 721 #ifdef U_EXPORT2
 722     /* Use the predefined value. */
 723 #elif defined(_MSC_VER)
 724 #   define U_EXPORT2 __cdecl
 725 #else
 726 #   define U_EXPORT2
 727 #endif
 728
 729 #ifdef U_IMPORT
 730     /* Use the predefined value. */
 731 #elif defined(_MSC_VER)
 732     /* Windows needs to export/import data. */
 733 #   define U_IMPORT __declspec(dllimport)
 734 #else
 735 #   define U_IMPORT
 736 #endif
 737
 738 /**
 739  * \def U_CALLCONV
 740  * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
 741  * in callback function typedefs to make sure that the calling convention
 742  * is compatible.
 743  *
 744  * This is only used for non-ICU-API functions.
 745  * When a function is a public ICU API,
 746  * you must use the U_CAPI and U_EXPORT2 qualifiers.
 747  * @stable ICU 2.0
 748  */
 749 #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
 750 #    define U_CALLCONV __cdecl
 751 #else
 752 #    define U_CALLCONV U_EXPORT2
 753 #endif
 754
 755 /* @} */
 756
 757 #endif