icuSources/common/unicode/platform.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 *
   6 *   Copyright (C) 1997-2016, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 ******************************************************************************
  10 *
  11 *  FILE NAME : platform.h
  12 *
  13 *   Date        Name        Description
  14 *   05/13/98    nos         Creation (content moved here from ptypes.h).
  15 *   03/02/99    stephen     Added AS400 support.
  16 *   03/30/99    stephen     Added Linux support.
  17 *   04/13/99    stephen     Reworked for autoconf.
  18 ******************************************************************************
  19 */
  20
  21 #ifndef _PLATFORM_H
  22 #define _PLATFORM_H
  23
  24 #include "unicode/uconfig.h"
  25 #include "unicode/uvernum.h"
  26
  27 /**
  28  * \file
  29  * \brief Basic types for the platform.
  30  *
  31  * This file used to be generated by autoconf/configure.
  32  * Starting with ICU 49, platform.h is a normal source file,
  33  * to simplify cross-compiling and working with non-autoconf/make build systems.
  34  *
  35  * When a value in this file does not work on a platform, then please
  36  * try to derive it from the U_PLATFORM value
  37  * (for which we might need a new value constant in rare cases)
  38  * and/or from other macros that are predefined by the compiler
  39  * or defined in standard (POSIX or platform or compiler) headers.
  40  *
  41  * As a temporary workaround, you can add an explicit <code>#define</code> for some macros
  42  * before it is first tested, or add an equivalent -D macro definition
  43  * to the compiler's command line.
  44  *
  45  * Note: Some compilers provide ways to show the predefined macros.
  46  * For example, with gcc you can compile an empty .c file and have the compiler
  47  * print the predefined macros with
  48  * \code
  49  * gcc -E -dM -x c /dev/null | sort
  50  * \endcode
  51  * (You can provide an actual empty .c file rather than /dev/null.
  52  * <code>-x c++</code> is for C++.)
  53  */
  54
  55 /**
  56  * Define some things so that they can be documented.
  57  * @internal
  58  */
  59 #ifdef U_IN_DOXYGEN
  60 /*
  61  * Problem: "platform.h:335: warning: documentation for unknown define U_HAVE_STD_STRING found." means that U_HAVE_STD_STRING is not documented.
  62  * 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.
  63  */
  64
  65 /* None for now. */
  66 #endif
  67
  68 /**
  69  * \def U_PLATFORM
  70  * The U_PLATFORM macro defines the platform we're on.
  71  *
  72  * We used to define one different, value-less macro per platform.
  73  * That made it hard to know the set of relevant platforms and macros,
  74  * and hard to deal with variants of platforms.
  75  *
  76  * Starting with ICU 49, we define platforms as numeric macros,
  77  * with ranges of values for related platforms and their variants.
  78  * The U_PLATFORM macro is set to one of these values.
  79  *
  80  * Historical note from the Solaris Wikipedia article:
  81  * AT&T and Sun collaborated on a project to merge the most popular Unix variants
  82  * on the market at that time: BSD, System V, and Xenix.
  83  * This became Unix System V Release 4 (SVR4).
  84  *
  85  * @internal
  86  */
  87
  88 /** Unknown platform. @internal */
  89 #define U_PF_UNKNOWN 0
  90 /** Windows @internal */
  91 #define U_PF_WINDOWS 1000
  92 /** MinGW. Windows, calls to Win32 API, but using GNU gcc and binutils. @internal */
  93 #define U_PF_MINGW 1800
  94 /**
  95  * Cygwin. Windows, calls to cygwin1.dll for Posix functions,
  96  * using MSVC or GNU gcc and binutils.
  97  * @internal
  98  */
  99 #define U_PF_CYGWIN 1900
 100 /* Reserve 2000 for U_PF_UNIX? */
 101 /** HP-UX is based on UNIX System V. @internal */
 102 #define U_PF_HPUX 2100
 103 /** Solaris is a Unix operating system based on SVR4. @internal */
 104 #define U_PF_SOLARIS 2600
 105 /** BSD is a UNIX operating system derivative. @internal */
 106 #define U_PF_BSD 3000
 107 /** AIX is based on UNIX System V Releases and 4.3 BSD. @internal */
 108 #define U_PF_AIX 3100
 109 /** IRIX is based on UNIX System V with BSD extensions. @internal */
 110 #define U_PF_IRIX 3200
 111 /**
 112  * Darwin is a POSIX-compliant operating system, composed of code developed by Apple,
 113  * as well as code derived from NeXTSTEP, BSD, and other projects,
 114  * built around the Mach kernel.
 115  * Darwin forms the core set of components upon which Mac OS X, Apple TV, and iOS are based.
 116  * (Original description modified from WikiPedia.)
 117  * @internal
 118  */
 119 #define U_PF_DARWIN 3500
 120 /** iPhone OS (iOS) is a derivative of Mac OS X. @internal */
 121 #define U_PF_IPHONE 3550
 122 /** QNX is a commercial Unix-like real-time operating system related to BSD. @internal */
 123 #define U_PF_QNX 3700
 124 /** Linux is a Unix-like operating system. @internal */
 125 #define U_PF_LINUX 4000
 126 /**
 127  * Native Client is pretty close to Linux.
 128  * See https://developer.chrome.com/native-client and
 129  *  http://www.chromium.org/nativeclient
 130  *  @internal
 131  */
 132 #define U_PF_BROWSER_NATIVE_CLIENT 4020
 133 /** Android is based on Linux. @internal */
 134 #define U_PF_ANDROID 4050
 135 /* Maximum value for Linux-based platform is 4499 */
 136 /** z/OS is the successor to OS/390 which was the successor to MVS. @internal */
 137 #define U_PF_OS390 9000
 138 /** "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal */
 139 #define U_PF_OS400 9400
 140
 141 #ifdef U_PLATFORM
 142     /* Use the predefined value. */
 143 #elif defined(__MINGW32__)
 144 #   define U_PLATFORM U_PF_MINGW
 145 #elif defined(__CYGWIN__)
 146 #   define U_PLATFORM U_PF_CYGWIN
 147 #elif defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
 148 #   define U_PLATFORM U_PF_WINDOWS
 149 #elif defined(__ANDROID__)
 150 #   define U_PLATFORM U_PF_ANDROID
 151     /* Android wchar_t support depends on the API level. */
 152 #   include <android/api-level.h>
 153 #elif defined(__pnacl__) || defined(__native_client__)
 154 #   define U_PLATFORM U_PF_BROWSER_NATIVE_CLIENT
 155 #elif defined(linux) || defined(__linux__) || defined(__linux)
 156 #   define U_PLATFORM U_PF_LINUX
 157 #elif defined(__APPLE__) && defined(__MACH__)
 158 #   include <TargetConditionals.h>
 159 #   if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE  /* variant of TARGET_OS_MAC */
 160 #       define U_PLATFORM U_PF_IPHONE
 161 #   else
 162 #       define U_PLATFORM U_PF_DARWIN
 163 #   endif
 164 #elif defined(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MirBSD__)
 165 #   if defined(__FreeBSD__)
 166 #       include <sys/endian.h>
 167 #   endif
 168 #   define U_PLATFORM U_PF_BSD
 169 #elif defined(sun) || defined(__sun)
 170     /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
 171 #   define U_PLATFORM U_PF_SOLARIS
 172 #   if defined(__GNUC__)
 173         /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
 174          * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
 175          *  is included which does not include this header file.
 176          */
 177 #       include <sys/isa_defs.h>
 178 #   endif
 179 #elif defined(_AIX) || defined(__TOS_AIX__)
 180 #   define U_PLATFORM U_PF_AIX
 181 #elif defined(_hpux) || defined(hpux) || defined(__hpux)
 182 #   define U_PLATFORM U_PF_HPUX
 183 #elif defined(sgi) || defined(__sgi)
 184 #   define U_PLATFORM U_PF_IRIX
 185 #elif defined(__QNX__) || defined(__QNXNTO__)
 186 #   define U_PLATFORM U_PF_QNX
 187 #elif defined(__TOS_MVS__)
 188 #   define U_PLATFORM U_PF_OS390
 189 #elif defined(__OS400__) || defined(__TOS_OS400__)
 190 #   define U_PLATFORM U_PF_OS400
 191 #else
 192 #   define U_PLATFORM U_PF_UNKNOWN
 193 #endif
 194
 195 /**
 196  * \def CYGWINMSVC
 197  * Defined if this is Windows with Cygwin, but using MSVC rather than gcc.
 198  * Otherwise undefined.
 199  * @internal
 200  */
 201 /* Commented out because this is already set in mh-cygwin-msvc
 202 #if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER)
 203 #   define CYGWINMSVC
 204 #endif
 205 */
 206
 207 /**
 208  * \def U_PLATFORM_USES_ONLY_WIN32_API
 209  * Defines whether the platform uses only the Win32 API.
 210  * Set to 1 for Windows/MSVC and MinGW but not Cygwin.
 211  * @internal
 212  */
 213 #ifdef U_PLATFORM_USES_ONLY_WIN32_API
 214     /* Use the predefined value. */
 215 #elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) || defined(CYGWINMSVC)
 216 #   define U_PLATFORM_USES_ONLY_WIN32_API 1
 217 #else
 218     /* Cygwin implements POSIX. */
 219 #   define U_PLATFORM_USES_ONLY_WIN32_API 0
 220 #endif
 221
 222 /**
 223  * \def U_PLATFORM_HAS_WIN32_API
 224  * Defines whether the Win32 API is available on the platform.
 225  * Set to 1 for Windows/MSVC, MinGW and Cygwin.
 226  * @internal
 227  */
 228 #ifdef U_PLATFORM_HAS_WIN32_API
 229     /* Use the predefined value. */
 230 #elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
 231 #   define U_PLATFORM_HAS_WIN32_API 1
 232 #else
 233 #   define U_PLATFORM_HAS_WIN32_API 0
 234 #endif
 235
 236 /**
 237  * \def U_PLATFORM_HAS_WINUWP_API
 238  * Defines whether target is intended for Universal Windows Platform API
 239  * Set to 1 for Windows10 Release Solution Configuration
 240  * @internal
 241  */
 242 #ifdef U_PLATFORM_HAS_WINUWP_API
 243     /* Use the predefined value. */
 244 #else
 245 #   define U_PLATFORM_HAS_WINUWP_API 0
 246 #endif
 247
 248 /**
 249  * \def U_PLATFORM_IMPLEMENTS_POSIX
 250  * Defines whether the platform implements (most of) the POSIX API.
 251  * Set to 1 for Cygwin and most other platforms.
 252  * @internal
 253  */
 254 #ifdef U_PLATFORM_IMPLEMENTS_POSIX
 255     /* Use the predefined value. */
 256 #elif U_PLATFORM_USES_ONLY_WIN32_API
 257 #   define U_PLATFORM_IMPLEMENTS_POSIX 0
 258 #else
 259 #   define U_PLATFORM_IMPLEMENTS_POSIX 1
 260 #endif
 261
 262 /**
 263  * \def U_PLATFORM_IS_LINUX_BASED
 264  * Defines whether the platform is Linux or one of its derivatives.
 265  * @internal
 266  */
 267 #ifdef U_PLATFORM_IS_LINUX_BASED
 268     /* Use the predefined value. */
 269 #elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= 4499
 270 #   define U_PLATFORM_IS_LINUX_BASED 1
 271 #else
 272 #   define U_PLATFORM_IS_LINUX_BASED 0
 273 #endif
 274
 275 /**
 276  * \def U_PLATFORM_IS_DARWIN_BASED
 277  * Defines whether the platform is Darwin or one of its derivatives.
 278  * @internal
 279  */
 280 #ifdef U_PLATFORM_IS_DARWIN_BASED
 281     /* Use the predefined value. */
 282 #elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE
 283 #   define U_PLATFORM_IS_DARWIN_BASED 1
 284 #else
 285 #   define U_PLATFORM_IS_DARWIN_BASED 0
 286 #endif
 287
 288 /**
 289  * \def U_HAVE_STDINT_H
 290  * Defines whether stdint.h is available. It is a C99 standard header.
 291  * We used to include inttypes.h which includes stdint.h but we usually do not need
 292  * the additional definitions from inttypes.h.
 293  * @internal
 294  */
 295 #ifdef U_HAVE_STDINT_H
 296     /* Use the predefined value. */
 297 #elif U_PLATFORM_USES_ONLY_WIN32_API
 298 #   if defined(__BORLANDC__) || U_PLATFORM == U_PF_MINGW || (defined(_MSC_VER) && _MSC_VER>=1600)
 299         /* Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. */
 300 #       define U_HAVE_STDINT_H 1
 301 #   else
 302 #       define U_HAVE_STDINT_H 0
 303 #   endif
 304 #elif U_PLATFORM == U_PF_SOLARIS
 305     /* Solaris has inttypes.h but not stdint.h. */
 306 #   define U_HAVE_STDINT_H 0
 307 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 308     /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
 309 #   define U_HAVE_STDINT_H 0
 310 #else
 311 #   define U_HAVE_STDINT_H 1
 312 #endif
 313
 314 /**
 315  * \def U_HAVE_INTTYPES_H
 316  * Defines whether inttypes.h is available. It is a C99 standard header.
 317  * We include inttypes.h where it is available but stdint.h is not.
 318  * @internal
 319  */
 320 #ifdef U_HAVE_INTTYPES_H
 321     /* Use the predefined value. */
 322 #elif U_PLATFORM == U_PF_SOLARIS
 323     /* Solaris has inttypes.h but not stdint.h. */
 324 #   define U_HAVE_INTTYPES_H 1
 325 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 326     /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
 327 #   define U_HAVE_INTTYPES_H 1
 328 #else
 329     /* Most platforms have both inttypes.h and stdint.h, or neither. */
 330 #   define U_HAVE_INTTYPES_H U_HAVE_STDINT_H
 331 #endif
 332
 333 /**
 334  * \def U_IOSTREAM_SOURCE
 335  * Defines what support for C++ streams is available.
 336  *
 337  * If U_IOSTREAM_SOURCE is set to 199711, then &lt;iostream&gt; is available
 338  * (the ISO/IEC C++ FDIS was published in November 1997), and then
 339  * one should qualify streams using the std namespace in ICU header
 340  * files.
 341  * Starting with ICU 49, this is the only supported version.
 342  *
 343  * If U_IOSTREAM_SOURCE is set to 198506, then &lt;iostream.h&gt; is
 344  * available instead (in June 1985 Stroustrup published
 345  * "An Extensible I/O Facility for C++" at the summer USENIX conference).
 346  * Starting with ICU 49, this version is not supported any more.
 347  *
 348  * If U_IOSTREAM_SOURCE is 0 (or any value less than 199711),
 349  * then C++ streams are not available and
 350  * support for them will be silently suppressed in ICU.
 351  *
 352  * @internal
 353  */
 354 #ifndef U_IOSTREAM_SOURCE
 355 #define U_IOSTREAM_SOURCE 199711
 356 #endif
 357
 358 /*===========================================================================*/
 359 /** @{ Compiler and environment features                                     */
 360 /*===========================================================================*/
 361
 362 /**
 363  * \def U_GCC_MAJOR_MINOR
 364  * Indicates whether the compiler is gcc (test for != 0),
 365  * and if so, contains its major (times 100) and minor version numbers.
 366  * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0.
 367  *
 368  * For example, for testing for whether we have gcc, and whether it's 4.6 or higher,
 369  * use "#if U_GCC_MAJOR_MINOR >= 406".
 370  * @internal
 371  */
 372 #ifdef __GNUC__
 373 #   define U_GCC_MAJOR_MINOR (__GNUC__ * 100 + __GNUC_MINOR__)
 374 #else
 375 #   define U_GCC_MAJOR_MINOR 0
 376 #endif
 377
 378 /**
 379  * \def U_IS_BIG_ENDIAN
 380  * Determines the endianness of the platform.
 381  * @internal
 382  */
 383 #ifdef U_IS_BIG_ENDIAN
 384     /* Use the predefined value. */
 385 #elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
 386 #   define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
 387 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
 388     /* gcc */
 389 #   define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
 390 #elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
 391 #   define U_IS_BIG_ENDIAN 1
 392 #elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
 393 #   define U_IS_BIG_ENDIAN 0
 394 #elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400 || defined(__s390__) || defined(__s390x__)
 395     /* These platforms do not appear to predefine any endianness macros. */
 396 #   define U_IS_BIG_ENDIAN 1
 397 #elif defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0)
 398     /* HPPA do not appear to predefine any endianness macros. */
 399 #   define U_IS_BIG_ENDIAN 1
 400 #elif defined(sparc) || defined(__sparc) || defined(__sparc__)
 401     /* Some sparc based systems (e.g. Linux) do not predefine any endianness macros. */
 402 #   define U_IS_BIG_ENDIAN 1
 403 #else
 404 #   define U_IS_BIG_ENDIAN 0
 405 #endif
 406
 407 /**
 408  * \def U_HAVE_PLACEMENT_NEW
 409  * Determines whether to override placement new and delete for STL.
 410  * @stable ICU 2.6
 411  */
 412 #ifdef U_HAVE_PLACEMENT_NEW
 413     /* Use the predefined value. */
 414 #elif defined(__BORLANDC__)
 415 #   define U_HAVE_PLACEMENT_NEW 0
 416 #else
 417 #   define U_HAVE_PLACEMENT_NEW 1
 418 #endif
 419
 420 /**
 421  * \def U_HAVE_DEBUG_LOCATION_NEW
 422  * Define this to define the MFC debug version of the operator new.
 423  *
 424  * @stable ICU 3.4
 425  */
 426 #ifdef U_HAVE_DEBUG_LOCATION_NEW
 427     /* Use the predefined value. */
 428 #elif defined(_MSC_VER)
 429 #   define U_HAVE_DEBUG_LOCATION_NEW 1
 430 #else
 431 #   define U_HAVE_DEBUG_LOCATION_NEW 0
 432 #endif
 433
 434 /* Compatibility with compilers other than clang: http://clang.llvm.org/docs/LanguageExtensions.html */
 435 #ifndef __has_attribute
 436 #    define __has_attribute(x) 0
 437 #endif
 438 #ifndef __has_cpp_attribute
 439 #    define __has_cpp_attribute(x) 0
 440 #endif
 441 #ifndef __has_builtin
 442 #    define __has_builtin(x) 0
 443 #endif
 444 #ifndef __has_feature
 445 #    define __has_feature(x) 0
 446 #endif
 447 #ifndef __has_extension
 448 #    define __has_extension(x) 0
 449 #endif
 450 #ifndef __has_warning
 451 #    define __has_warning(x) 0
 452 #endif
 453
 454 /**
 455  * \def U_MALLOC_ATTR
 456  * Attribute to mark functions as malloc-like
 457  * @internal
 458  */
 459 #if defined(__GNUC__) && __GNUC__>=3
 460 #    define U_MALLOC_ATTR __attribute__ ((__malloc__))
 461 #else
 462 #    define U_MALLOC_ATTR
 463 #endif
 464
 465 /**
 466  * \def U_ALLOC_SIZE_ATTR
 467  * Attribute to specify the size of the allocated buffer for malloc-like functions
 468  * @internal
 469  */
 470 #if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || __has_attribute(alloc_size)
 471 #   define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X)))
 472 #   define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y)))
 473 #else
 474 #   define U_ALLOC_SIZE_ATTR(X)
 475 #   define U_ALLOC_SIZE_ATTR2(X,Y)
 476 #endif
 477
 478 /**
 479  * \def U_CPLUSPLUS_VERSION
 480  * 0 if no C++; 1, 11, 14, ... if C++.
 481  * Support for specific features cannot always be determined by the C++ version alone.
 482  * @internal
 483  */
 484 #ifdef U_CPLUSPLUS_VERSION
 485 #   if U_CPLUSPLUS_VERSION != 0 && !defined(__cplusplus)
 486 #       undef U_CPLUSPLUS_VERSION
 487 #       define U_CPLUSPLUS_VERSION 0
 488 #   endif
 489     /* Otherwise use the predefined value. */
 490 #elif !defined(__cplusplus)
 491 #   define U_CPLUSPLUS_VERSION 0
 492 #elif __cplusplus >= 201402L
 493 #   define U_CPLUSPLUS_VERSION 14
 494 #elif __cplusplus >= 201103L
 495 #   define U_CPLUSPLUS_VERSION 11
 496 #else
 497     // C++98 or C++03
 498 #   define U_CPLUSPLUS_VERSION 1
 499 #endif
 500
 501 #if (U_PLATFORM == U_PF_AIX || U_PLATFORM == U_PF_OS390) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11)
 502 // add in std::nullptr_t
 503 namespace std {
 504   typedef decltype(nullptr) nullptr_t;
 505 };
 506 #endif
 507
 508 /**
 509  * \def U_HAVE_RVALUE_REFERENCES
 510  * Set to 1 if the compiler supports rvalue references.
 511  * C++11 feature, necessary for move constructor & move assignment.
 512  * @internal
 513  */
 514 #ifdef U_HAVE_RVALUE_REFERENCES
 515     /* Use the predefined value. */
 516 #elif U_CPLUSPLUS_VERSION >= 11 || __has_feature(cxx_rvalue_references) \
 517         || defined(__GXX_EXPERIMENTAL_CXX0X__) \
 518         || (defined(_MSC_VER) && _MSC_VER >= 1600)  /* Visual Studio 2010 */
 519 #   define U_HAVE_RVALUE_REFERENCES 1
 520 #else
 521 #   define U_HAVE_RVALUE_REFERENCES 0
 522 #endif
 523
 524 /**
 525  * \def U_NOEXCEPT
 526  * "noexcept" if supported, otherwise empty.
 527  * Some code, especially STL containers, uses move semantics of objects only
 528  * if the move constructor and the move operator are declared as not throwing exceptions.
 529  * @internal
 530  */
 531 #ifdef U_NOEXCEPT
 532     /* Use the predefined value. */
 533 #elif defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS  /* Visual Studio */
 534 #   define U_NOEXCEPT
 535 #elif U_CPLUSPLUS_VERSION >= 11 || __has_feature(cxx_noexcept) || __has_extension(cxx_noexcept) \
 536         || (defined(_MSC_VER) && _MSC_VER >= 1900)  /* Visual Studio 2015 */
 537 #   define U_NOEXCEPT noexcept
 538 #else
 539 #   define U_NOEXCEPT
 540 #endif
 541
 542 /**
 543  * \def U_FALLTHROUGH
 544  * Annotate intentional fall-through between switch labels.
 545  * http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
 546  * @internal
 547  */
 548 #ifndef __cplusplus
 549     // Not for C.
 550 #elif defined(U_FALLTHROUGH)
 551     // Use the predefined value.
 552 #elif defined(__clang__)
 553     // Test for compiler vs. feature separately.
 554     // Other compilers might choke on the feature test.
 555 #   if __has_cpp_attribute(clang::fallthrough) || \
 556             (__has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough"))
 557 #       define U_FALLTHROUGH [[clang::fallthrough]]
 558 #   endif
 559 #endif
 560
 561 #ifndef U_FALLTHROUGH
 562 #   define U_FALLTHROUGH
 563 #endif
 564
 565 /** @} */
 566
 567 /*===========================================================================*/
 568 /** @{ Character data types                                                  */
 569 /*===========================================================================*/
 570
 571 /**
 572  * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
 573  * @stable ICU 2.0
 574  */
 575 #define U_ASCII_FAMILY 0
 576
 577 /**
 578  * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
 579  * @stable ICU 2.0
 580  */
 581 #define U_EBCDIC_FAMILY 1
 582
 583 /**
 584  * \def U_CHARSET_FAMILY
 585  *
 586  * <p>These definitions allow to specify the encoding of text
 587  * in the char data type as defined by the platform and the compiler.
 588  * It is enough to determine the code point values of "invariant characters",
 589  * which are the ones shared by all encodings that are in use
 590  * on a given platform.</p>
 591  *
 592  * <p>Those "invariant characters" should be all the uppercase and lowercase
 593  * latin letters, the digits, the space, and "basic punctuation".
 594  * Also, '\\n', '\\r', '\\t' should be available.</p>
 595  *
 596  * <p>The list of "invariant characters" is:<br>
 597  * \code
 598  *    A-Z  a-z  0-9  SPACE  "  %  &amp;  '  (  )  *  +  ,  -  .  /  :  ;  <  =  >  ?  _
 599  * \endcode
 600  * <br>
 601  * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p>
 602  *
 603  * <p>This matches the IBM Syntactic Character Set (CS 640).</p>
 604  *
 605  * <p>In other words, all the graphic characters in 7-bit ASCII should
 606  * be safely accessible except the following:</p>
 607  *
 608  * \code
 609  *    '\' <backslash>
 610  *    '[' <left bracket>
 611  *    ']' <right bracket>
 612  *    '{' <left brace>
 613  *    '}' <right brace>
 614  *    '^' <circumflex>
 615  *    '~' <tilde>
 616  *    '!' <exclamation mark>
 617  *    '#' <number sign>
 618  *    '|' <vertical line>
 619  *    '$' <dollar sign>
 620  *    '@' <commercial at>
 621  *    '`' <grave accent>
 622  * \endcode
 623  * @stable ICU 2.0
 624  */
 625 #ifdef U_CHARSET_FAMILY
 626     /* Use the predefined value. */
 627 #elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
 628 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 629 #elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
 630 #   define U_CHARSET_FAMILY U_EBCDIC_FAMILY
 631 #else
 632 #   define U_CHARSET_FAMILY U_ASCII_FAMILY
 633 #endif
 634
 635 /**
 636  * \def U_CHARSET_IS_UTF8
 637  *
 638  * Hardcode the default charset to UTF-8.
 639  *
 640  * If this is set to 1, then
 641  * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
 642  *   contain UTF-8 text, regardless of what the system API uses
 643  * - some ICU code will use fast functions like u_strFromUTF8()
 644  *   rather than the more general and more heavy-weight conversion API (ucnv.h)
 645  * - ucnv_getDefaultName() always returns "UTF-8"
 646  * - ucnv_setDefaultName() is disabled and will not change the default charset
 647  * - static builds of ICU are smaller
 648  * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
 649  *   configuration option (see unicode/uconfig.h)
 650  * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
 651  *
 652  * @stable ICU 4.2
 653  * @see UCONFIG_NO_CONVERSION
 654  */
 655 #ifdef U_CHARSET_IS_UTF8
 656     /* Use the predefined value. */
 657 #elif U_PLATFORM == U_PF_ANDROID || U_PLATFORM_IS_DARWIN_BASED
 658 #   define U_CHARSET_IS_UTF8 1
 659 #else
 660 #   define U_CHARSET_IS_UTF8 0
 661 #endif
 662
 663 /** @} */
 664
 665 /*===========================================================================*/
 666 /** @{ Information about wchar support                                       */
 667 /*===========================================================================*/
 668
 669 /**
 670  * \def U_HAVE_WCHAR_H
 671  * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
 672  *
 673  * @stable ICU 2.0
 674  */
 675 #ifdef U_HAVE_WCHAR_H
 676     /* Use the predefined value. */
 677 #elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
 678     /*
 679      * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
 680      * The type and header existed, but the library functions did not work as expected.
 681      * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
 682      */
 683 #   define U_HAVE_WCHAR_H 0
 684 #else
 685 #   define U_HAVE_WCHAR_H 1
 686 #endif
 687
 688 /**
 689  * \def U_SIZEOF_WCHAR_T
 690  * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
 691  *
 692  * @stable ICU 2.0
 693  */
 694 #ifdef U_SIZEOF_WCHAR_T
 695     /* Use the predefined value. */
 696 #elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9)
 697     /*
 698      * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
 699      * Newer Mac OS X has size 4.
 700      */
 701 #   define U_SIZEOF_WCHAR_T 1
 702 #elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
 703 #   define U_SIZEOF_WCHAR_T 2
 704 #elif U_PLATFORM == U_PF_AIX
 705     /*
 706      * AIX 6.1 information, section "Wide character data representation":
 707      * "... the wchar_t datatype is 32-bit in the 64-bit environment and
 708      * 16-bit in the 32-bit environment."
 709      * and
 710      * "All locales use Unicode for their wide character code values (process code),
 711      * except the IBM-eucTW codeset."
 712      */
 713 #   ifdef __64BIT__
 714 #       define U_SIZEOF_WCHAR_T 4
 715 #   else
 716 #       define U_SIZEOF_WCHAR_T 2
 717 #   endif
 718 #elif U_PLATFORM == U_PF_OS390
 719     /*
 720      * z/OS V1R11 information center, section "LP64 | ILP32":
 721      * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
 722      * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
 723      */
 724 #   ifdef _LP64
 725 #       define U_SIZEOF_WCHAR_T 4
 726 #   else
 727 #       define U_SIZEOF_WCHAR_T 2
 728 #   endif
 729 #elif U_PLATFORM == U_PF_OS400
 730 #   if defined(__UTF32__)
 731         /*
 732          * LOCALETYPE(*LOCALEUTF) is specified.
 733          * Wide-character strings are in UTF-32,
 734          * narrow-character strings are in UTF-8.
 735          */
 736 #       define U_SIZEOF_WCHAR_T 4
 737 #   elif defined(__UCS2__)
 738         /*
 739          * LOCALETYPE(*LOCALEUCS2) is specified.
 740          * Wide-character strings are in UCS-2,
 741          * narrow-character strings are in EBCDIC.
 742          */
 743 #       define U_SIZEOF_WCHAR_T 2
 744 #else
 745         /*
 746          * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
 747          * Wide-character strings are in 16-bit EBCDIC,
 748          * narrow-character strings are in EBCDIC.
 749          */
 750 #       define U_SIZEOF_WCHAR_T 2
 751 #   endif
 752 #else
 753 #   define U_SIZEOF_WCHAR_T 4
 754 #endif
 755
 756 #ifndef U_HAVE_WCSCPY
 757 #define U_HAVE_WCSCPY U_HAVE_WCHAR_H
 758 #endif
 759
 760 /** @} */
 761
 762 /**
 763  * \def U_HAVE_CHAR16_T
 764  * Defines whether the char16_t type is available for UTF-16
 765  * and u"abc" UTF-16 string literals are supported.
 766  * This is a new standard type and standard string literal syntax in C++0x
 767  * but has been available in some compilers before.
 768  * @internal
 769  */
 770 #ifdef U_HAVE_CHAR16_T
 771     /* Use the predefined value. */
 772 #else
 773     /*
 774      * Notes:
 775      * Visual Studio 10 (_MSC_VER>=1600) defines char16_t but
 776      * does not support u"abc" string literals.
 777      * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
 778      * does not support u"abc" string literals.
 779      * C++11 and C11 require support for UTF-16 literals
 780      * TODO: Fix for plain C. Doesn't work on Mac.
 781      */
 782 #   if U_CPLUSPLUS_VERSION >= 11 || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
 783 #       define U_HAVE_CHAR16_T 1
 784 #   else
 785 #       define U_HAVE_CHAR16_T 0
 786 #   endif
 787 #endif
 788
 789 /**
 790  * @{
 791  * \def U_DECLARE_UTF16
 792  * Do not use this macro because it is not defined on all platforms.
 793  * Use the UNICODE_STRING or U_STRING_DECL macros instead.
 794  * @internal
 795  */
 796 #ifdef U_DECLARE_UTF16
 797     /* Use the predefined value. */
 798 #elif U_HAVE_CHAR16_T \
 799     || (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
 800     || (defined(__HP_aCC) && __HP_aCC >= 035000) \
 801     || (defined(__HP_cc) && __HP_cc >= 111106)
 802 #   define U_DECLARE_UTF16(string) u ## string
 803 #elif U_SIZEOF_WCHAR_T == 2 \
 804     && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
 805 #   define U_DECLARE_UTF16(string) L ## string
 806 #else
 807     /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
 808 #endif
 809
 810 /** @} */
 811
 812 /*===========================================================================*/
 813 /** @{ Symbol import-export control                                          */
 814 /*===========================================================================*/
 815
 816 #ifdef U_EXPORT
 817     /* Use the predefined value. */
 818 #elif defined(U_STATIC_IMPLEMENTATION)
 819 #   define U_EXPORT
 820 #elif defined(__GNUC__)
 821 #   define U_EXPORT __attribute__((visibility("default")))
 822 #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
 823    || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550)
 824 #   define U_EXPORT __global
 825 /*#elif defined(__HP_aCC) || defined(__HP_cc)
 826 #   define U_EXPORT __declspec(dllexport)*/
 827 #elif defined(_MSC_VER)
 828 #   define U_EXPORT __declspec(dllexport)
 829 #else
 830 #   define U_EXPORT
 831 #endif
 832
 833 /* U_CALLCONV is releated to U_EXPORT2 */
 834 #ifdef U_EXPORT2
 835     /* Use the predefined value. */
 836 #elif defined(_MSC_VER)
 837 #   define U_EXPORT2 __cdecl
 838 #else
 839 #   define U_EXPORT2
 840 #endif
 841
 842 #ifdef U_IMPORT
 843     /* Use the predefined value. */
 844 #elif defined(_MSC_VER)
 845     /* Windows needs to export/import data. */
 846 #   define U_IMPORT __declspec(dllimport)
 847 #else
 848 #   define U_IMPORT
 849 #endif
 850
 851 /**
 852  * \def U_CALLCONV
 853  * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
 854  * in callback function typedefs to make sure that the calling convention
 855  * is compatible.
 856  *
 857  * This is only used for non-ICU-API functions.
 858  * When a function is a public ICU API,
 859  * you must use the U_CAPI and U_EXPORT2 qualifiers.
 860  *
 861  * Please note, you need to use U_CALLCONV after the *.
 862  *
 863  * NO : "static const char U_CALLCONV *func( . . . )"
 864  * YES: "static const char* U_CALLCONV func( . . . )"
 865  *
 866  * @stable ICU 2.0
 867  */
 868 #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
 869 #    define U_CALLCONV __cdecl
 870 #else
 871 #    define U_CALLCONV U_EXPORT2
 872 #endif
 873
 874 /* @} */
 875
 876 #endif