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// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ****************************************************************************** * * Copyright (C) 1997-2016, International Business Machines * Corporation and others. All Rights Reserved. * ****************************************************************************** * * FILE NAME : platform.h * * Date Name Description * 05/13/98 nos Creation (content moved here from ptypes.h). * 03/02/99 stephen Added AS400 support. * 03/30/99 stephen Added Linux support. * 04/13/99 stephen Reworked for autoconf. ****************************************************************************** / #ifndef _PLATFORM_H #define _PLATFORM_H #include "unicode/uconfig.h" #include "unicode/uvernum.h" /* * \file * \brief Basic types for the platform. * * This file used to be generated by autoconf/configure. * Starting with ICU 49, platform.h is a normal source file, * to simplify cross-compiling and working with non-autoconf/make build systems. * * When a value in this file does not work on a platform, then please * try to derive it from the U_PLATFORM value * (for which we might need a new value constant in rare cases) * and/or from other macros that are predefined by the compiler * or defined in standard (POSIX or platform or compiler) headers. * * As a temporary workaround, you can add an explicit \#define for some macros * before it is first tested, or add an equivalent -D macro definition * to the compiler's command line. * * Note: Some compilers provide ways to show the predefined macros. * For example, with gcc you can compile an empty .c file and have the compiler * print the predefined macros with * \code * gcc -E -dM -x c /dev/null \| sort * \endcode * (You can provide an actual empty .c file rather than /dev/null. * <code>-x c++</code> is for C++.) / /* * Define some things so that they can be documented. * @internal / #ifdef U_IN_DOXYGEN / * Problem: "platform.h:335: warning: documentation for unknown define U_HAVE_STD_STRING found." means that U_HAVE_STD_STRING is not documented. * 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. / / None for now. / #endif /* * \def U_PLATFORM * The U_PLATFORM macro defines the platform we're on. * * We used to define one different, value-less macro per platform. * That made it hard to know the set of relevant platforms and macros, * and hard to deal with variants of platforms. * * Starting with ICU 49, we define platforms as numeric macros, * with ranges of values for related platforms and their variants. * The U_PLATFORM macro is set to one of these values. * * Historical note from the Solaris Wikipedia article: * AT&T and Sun collaborated on a project to merge the most popular Unix variants * on the market at that time: BSD, System V, and Xenix. * This became Unix System V Release 4 (SVR4). * * @internal / /* Unknown platform. @internal / #define U_PF_UNKNOWN 0 /* Windows @internal / #define U_PF_WINDOWS 1000 /* MinGW. Windows, calls to Win32 API, but using GNU gcc and binutils. @internal / #define U_PF_MINGW 1800 /* * Cygwin. Windows, calls to cygwin1.dll for Posix functions, * using MSVC or GNU gcc and binutils. * @internal / #define U_PF_CYGWIN 1900 / Reserve 2000 for U_PF_UNIX? / /* HP-UX is based on UNIX System V. @internal / #define U_PF_HPUX 2100 /* Solaris is a Unix operating system based on SVR4. @internal / #define U_PF_SOLARIS 2600 /* BSD is a UNIX operating system derivative. @internal / #define U_PF_BSD 3000 /* AIX is based on UNIX System V Releases and 4.3 BSD. @internal / #define U_PF_AIX 3100 /* IRIX is based on UNIX System V with BSD extensions. @internal / #define U_PF_IRIX 3200 /* * Darwin is a POSIX-compliant operating system, composed of code developed by Apple, * as well as code derived from NeXTSTEP, BSD, and other projects, * built around the Mach kernel. * Darwin forms the core set of components upon which Mac OS X, Apple TV, and iOS are based. * (Original description modified from WikiPedia.) * @internal / #define U_PF_DARWIN 3500 /* iPhone OS (iOS) is a derivative of Mac OS X. @internal / #define U_PF_IPHONE 3550 /* QNX is a commercial Unix-like real-time operating system related to BSD. @internal / #define U_PF_QNX 3700 /* Linux is a Unix-like operating system. @internal / #define U_PF_LINUX 4000 /* * Native Client is pretty close to Linux. * See https://developer.chrome.com/native-client and * http://www.chromium.org/nativeclient * @internal / #define U_PF_BROWSER_NATIVE_CLIENT 4020 /* Android is based on Linux. @internal / #define U_PF_ANDROID 4050 /* Fuchsia is a POSIX-ish platform. @internal / #define U_PF_FUCHSIA 4100 / Maximum value for Linux-based platform is 4499 / /* * Emscripten is a C++ transpiler for the Web that can target asm.js or * WebAssembly. It provides some POSIX-compatible wrappers and stubs and * some Linux-like functionality, but is not fully compatible with * either. * @internal / #define U_PF_EMSCRIPTEN 5010 /* z/OS is the successor to OS/390 which was the successor to MVS. @internal / #define U_PF_OS390 9000 /* "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal / #define U_PF_OS400 9400 #ifdef U_PLATFORM / Use the predefined value. / #elif defined(__MINGW32__) # define U_PLATFORM U_PF_MINGW #elif defined(__CYGWIN__) # define U_PLATFORM U_PF_CYGWIN #elif defined(WIN32) \|\| defined(_WIN32) \|\| defined(WIN64) \|\| defined(_WIN64) # define U_PLATFORM U_PF_WINDOWS #elif defined(__ANDROID__) # define U_PLATFORM U_PF_ANDROID / Android wchar_t support depends on the API level. / # include <android/api-level.h> #elif defined(__pnacl__) \|\| defined(__native_client__) # define U_PLATFORM U_PF_BROWSER_NATIVE_CLIENT #elif defined(__Fuchsia__) # define U_PLATFORM U_PF_FUCHSIA #elif defined(linux) \|\| defined(__linux__) \|\| defined(__linux) # define U_PLATFORM U_PF_LINUX #elif defined(__APPLE__) && defined(__MACH__) # include <TargetConditionals.h> # if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) && (defined(TARGET_OS_MACCATALYST) && !TARGET_OS_MACCATALYST) / variant of TARGET_OS_MAC / # define U_PLATFORM U_PF_IPHONE # else # define U_PLATFORM U_PF_DARWIN # endif #elif defined(BSD) \|\| defined(__FreeBSD__) \|\| defined(__FreeBSD_kernel__) \|\| defined(__NetBSD__) \|\| defined(__OpenBSD__) \|\| defined(__MirBSD__) # if defined(__FreeBSD__) # include <sys/endian.h> # endif # define U_PLATFORM U_PF_BSD #elif defined(sun) \|\| defined(__sun) / Check defined(__SVR4) \|\| defined(__svr4__) to distinguish Solaris from SunOS? / # define U_PLATFORM U_PF_SOLARIS # if defined(__GNUC__) / Solaris/GCC needs this header file to get the proper endianness. Normally, this * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h * is included which does not include this header file. / # include <sys/isa_defs.h> # endif #elif defined(_AIX) \|\| defined(__TOS_AIX__) # define U_PLATFORM U_PF_AIX #elif defined(_hpux) \|\| defined(hpux) \|\| defined(__hpux) # define U_PLATFORM U_PF_HPUX #elif defined(sgi) \|\| defined(__sgi) # define U_PLATFORM U_PF_IRIX #elif defined(__QNX__) \|\| defined(__QNXNTO__) # define U_PLATFORM U_PF_QNX #elif defined(__TOS_MVS__) # define U_PLATFORM U_PF_OS390 #elif defined(__OS400__) \|\| defined(__TOS_OS400__) # define U_PLATFORM U_PF_OS400 #elif defined(__EMSCRIPTEN__) # define U_PLATFORM U_PF_EMSCRIPTEN #else # define U_PLATFORM U_PF_UNKNOWN #endif /* * \def CYGWINMSVC * Defined if this is Windows with Cygwin, but using MSVC rather than gcc. * Otherwise undefined. * @internal / / Commented out because this is already set in mh-cygwin-msvc #if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER) # define CYGWINMSVC #endif / #ifdef U_IN_DOXYGEN # define CYGWINMSVC #endif /* * \def U_PLATFORM_USES_ONLY_WIN32_API * Defines whether the platform uses only the Win32 API. * Set to 1 for Windows/MSVC and MinGW but not Cygwin. * @internal / #ifdef U_PLATFORM_USES_ONLY_WIN32_API / Use the predefined value. / #elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) \|\| defined(CYGWINMSVC) # define U_PLATFORM_USES_ONLY_WIN32_API 1 #else / Cygwin implements POSIX. / # define U_PLATFORM_USES_ONLY_WIN32_API 0 #endif /* * \def U_PLATFORM_HAS_WIN32_API * Defines whether the Win32 API is available on the platform. * Set to 1 for Windows/MSVC, MinGW and Cygwin. * @internal / #ifdef U_PLATFORM_HAS_WIN32_API / Use the predefined value. / #elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN # define U_PLATFORM_HAS_WIN32_API 1 #else # define U_PLATFORM_HAS_WIN32_API 0 #endif /* * \def U_PLATFORM_HAS_WINUWP_API * Defines whether target is intended for Universal Windows Platform API * Set to 1 for Windows10 Release Solution Configuration * @internal / #ifdef U_PLATFORM_HAS_WINUWP_API / Use the predefined value. / #else # define U_PLATFORM_HAS_WINUWP_API 0 #endif /* * \def U_PLATFORM_IMPLEMENTS_POSIX * Defines whether the platform implements (most of) the POSIX API. * Set to 1 for Cygwin and most other platforms. * @internal / #ifdef U_PLATFORM_IMPLEMENTS_POSIX / Use the predefined value. / #elif U_PLATFORM_USES_ONLY_WIN32_API # define U_PLATFORM_IMPLEMENTS_POSIX 0 #else # define U_PLATFORM_IMPLEMENTS_POSIX 1 #endif /* * \def U_PLATFORM_IS_LINUX_BASED * Defines whether the platform is Linux or one of its derivatives. * @internal / #ifdef U_PLATFORM_IS_LINUX_BASED / Use the predefined value. / #elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= 4499 # define U_PLATFORM_IS_LINUX_BASED 1 #else # define U_PLATFORM_IS_LINUX_BASED 0 #endif /* * \def U_PLATFORM_IS_DARWIN_BASED * Defines whether the platform is Darwin or one of its derivatives. * @internal / #ifdef U_PLATFORM_IS_DARWIN_BASED / Use the predefined value. / #elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE # define U_PLATFORM_IS_DARWIN_BASED 1 #else # define U_PLATFORM_IS_DARWIN_BASED 0 #endif /* * \def U_HAVE_STDINT_H * Defines whether stdint.h is available. It is a C99 standard header. * We used to include inttypes.h which includes stdint.h but we usually do not need * the additional definitions from inttypes.h. * @internal / #ifdef U_HAVE_STDINT_H / Use the predefined value. / #elif U_PLATFORM_USES_ONLY_WIN32_API # if defined(__BORLANDC__) \|\| U_PLATFORM == U_PF_MINGW \|\| (defined(_MSC_VER) && _MSC_VER>=1600) / Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. / # define U_HAVE_STDINT_H 1 # else # define U_HAVE_STDINT_H 0 # endif #elif U_PLATFORM == U_PF_SOLARIS / Solaris has inttypes.h but not stdint.h. / # define U_HAVE_STDINT_H 0 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER) / PPC AIX <= 4.3 has inttypes.h but not stdint.h. / # define U_HAVE_STDINT_H 0 #else # define U_HAVE_STDINT_H 1 #endif /* * \def U_HAVE_INTTYPES_H * Defines whether inttypes.h is available. It is a C99 standard header. * We include inttypes.h where it is available but stdint.h is not. * @internal / #ifdef U_HAVE_INTTYPES_H / Use the predefined value. / #elif U_PLATFORM == U_PF_SOLARIS / Solaris has inttypes.h but not stdint.h. / # define U_HAVE_INTTYPES_H 1 #elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER) / PPC AIX <= 4.3 has inttypes.h but not stdint.h. / # define U_HAVE_INTTYPES_H 1 #else / Most platforms have both inttypes.h and stdint.h, or neither. / # define U_HAVE_INTTYPES_H U_HAVE_STDINT_H #endif /===========================================================================/ /* @{ Compiler and environment features / /===========================================================================/ /* * \def U_GCC_MAJOR_MINOR * Indicates whether the compiler is gcc (test for != 0), * and if so, contains its major (times 100) and minor version numbers. * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0. * * For example, for testing for whether we have gcc, and whether it's 4.6 or higher, * use "#if U_GCC_MAJOR_MINOR >= 406". * @internal / #ifdef __GNUC__ # define U_GCC_MAJOR_MINOR (__GNUC__ 100 + __GNUC_MINOR__) #else # define U_GCC_MAJOR_MINOR 0 #endif /** * \def U_IS_BIG_ENDIAN * Determines the endianness of the platform. * @internal / #ifdef U_IS_BIG_ENDIAN / Use the predefined value. / #elif defined(BYTE_ORDER) && defined(BIG_ENDIAN) # define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN) #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) / gcc / # define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) #elif defined(__BIG_ENDIAN__) \|\| defined(_BIG_ENDIAN) # define U_IS_BIG_ENDIAN 1 #elif defined(__LITTLE_ENDIAN__) \|\| defined(_LITTLE_ENDIAN) # define U_IS_BIG_ENDIAN 0 #elif U_PLATFORM == U_PF_OS390 \|\| U_PLATFORM == U_PF_OS400 \|\| defined(__s390__) \|\| defined(__s390x__) / These platforms do not appear to predefine any endianness macros. / # define U_IS_BIG_ENDIAN 1 #elif defined(_PA_RISC1_0) \|\| defined(_PA_RISC1_1) \|\| defined(_PA_RISC2_0) / HPPA do not appear to predefine any endianness macros. / # define U_IS_BIG_ENDIAN 1 #elif defined(sparc) \|\| defined(__sparc) \|\| defined(__sparc__) / Some sparc based systems (e.g. Linux) do not predefine any endianness macros. / # define U_IS_BIG_ENDIAN 1 #else # define U_IS_BIG_ENDIAN 0 #endif /* * \def U_HAVE_PLACEMENT_NEW * Determines whether to override placement new and delete for STL. * @stable ICU 2.6 / #ifdef U_HAVE_PLACEMENT_NEW / Use the predefined value. / #elif defined(__BORLANDC__) # define U_HAVE_PLACEMENT_NEW 0 #else # define U_HAVE_PLACEMENT_NEW 1 #endif /* * \def U_HAVE_DEBUG_LOCATION_NEW * Define this to define the MFC debug version of the operator new. * * @stable ICU 3.4 / #ifdef U_HAVE_DEBUG_LOCATION_NEW / Use the predefined value. / #elif defined(_MSC_VER) # define U_HAVE_DEBUG_LOCATION_NEW 1 #else # define U_HAVE_DEBUG_LOCATION_NEW 0 #endif / Compatibility with compilers other than clang: http://clang.llvm.org/docs/LanguageExtensions.html / #ifdef __has_attribute # define UPRV_HAS_ATTRIBUTE(x) __has_attribute(x) #else # define UPRV_HAS_ATTRIBUTE(x) 0 #endif #ifdef __has_cpp_attribute # define UPRV_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) #else # define UPRV_HAS_CPP_ATTRIBUTE(x) 0 #endif #ifdef __has_declspec_attribute # define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) __has_declspec_attribute(x) #else # define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) 0 #endif #ifdef __has_builtin # define UPRV_HAS_BUILTIN(x) __has_builtin(x) #else # define UPRV_HAS_BUILTIN(x) 0 #endif #ifdef __has_feature # define UPRV_HAS_FEATURE(x) __has_feature(x) #else # define UPRV_HAS_FEATURE(x) 0 #endif #ifdef __has_extension # define UPRV_HAS_EXTENSION(x) __has_extension(x) #else # define UPRV_HAS_EXTENSION(x) 0 #endif #ifdef __has_warning # define UPRV_HAS_WARNING(x) __has_warning(x) #else # define UPRV_HAS_WARNING(x) 0 #endif /* * \def U_MALLOC_ATTR * Attribute to mark functions as malloc-like * @internal / #if defined(__GNUC__) && __GNUC__>=3 # define U_MALLOC_ATTR __attribute__ ((__malloc__)) #else # define U_MALLOC_ATTR #endif /* * \def U_ALLOC_SIZE_ATTR * Attribute to specify the size of the allocated buffer for malloc-like functions * @internal / #if (defined(__GNUC__) && \ (__GNUC__ > 4 \|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) \|\| \ UPRV_HAS_ATTRIBUTE(alloc_size) # define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X))) # define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y))) #else # define U_ALLOC_SIZE_ATTR(X) # define U_ALLOC_SIZE_ATTR2(X,Y) #endif /* * \def U_CPLUSPLUS_VERSION * 0 if no C++; 1, 11, 14, ... if C++. * Support for specific features cannot always be determined by the C++ version alone. * @internal / #ifdef U_CPLUSPLUS_VERSION # if U_CPLUSPLUS_VERSION != 0 && !defined(__cplusplus) # undef U_CPLUSPLUS_VERSION # define U_CPLUSPLUS_VERSION 0 # endif / Otherwise use the predefined value. / #elif !defined(__cplusplus) # define U_CPLUSPLUS_VERSION 0 #elif __cplusplus >= 201402L \|\| (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L) # define U_CPLUSPLUS_VERSION 14 #elif __cplusplus >= 201103L \|\| (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L) # define U_CPLUSPLUS_VERSION 11 #else // C++98 or C++03 # define U_CPLUSPLUS_VERSION 1 #endif #if (U_PLATFORM == U_PF_AIX \|\| U_PLATFORM == U_PF_OS390) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11) // add in std::nullptr_t namespace std { typedef decltype(nullptr) nullptr_t; }; #endif /* * \def U_NOEXCEPT * "noexcept" if supported, otherwise empty. * Some code, especially STL containers, uses move semantics of objects only * if the move constructor and the move operator are declared as not throwing exceptions. * @internal / #ifdef U_NOEXCEPT / Use the predefined value. / #else # define U_NOEXCEPT noexcept #endif /* * \def U_FALLTHROUGH * Annotate intentional fall-through between switch labels. * http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough * @internal / #ifndef __cplusplus // Not for C. #elif defined(U_FALLTHROUGH) // Use the predefined value. #elif defined(__clang__) // Test for compiler vs. feature separately. // Other compilers might choke on the feature test. # if UPRV_HAS_CPP_ATTRIBUTE(clang::fallthrough) \|\| \ (UPRV_HAS_FEATURE(cxx_attributes) && \ UPRV_HAS_WARNING("-Wimplicit-fallthrough")) # define U_FALLTHROUGH [[clang::fallthrough]] # endif #elif defined(__GNUC__) && (__GNUC__ >= 7) # define U_FALLTHROUGH __attribute__((fallthrough)) #endif #ifndef U_FALLTHROUGH # define U_FALLTHROUGH #endif /* @} / /===========================================================================/ /* @{ Character data types / /===========================================================================/ /* * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform. * @stable ICU 2.0 / #define U_ASCII_FAMILY 0 /* * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform. * @stable ICU 2.0 / #define U_EBCDIC_FAMILY 1 /* * \def U_CHARSET_FAMILY * * <p>These definitions allow to specify the encoding of text * in the char data type as defined by the platform and the compiler. * It is enough to determine the code point values of "invariant characters", * which are the ones shared by all encodings that are in use * on a given platform.</p> * * <p>Those "invariant characters" should be all the uppercase and lowercase * latin letters, the digits, the space, and "basic punctuation". * Also, '\\n', '\\r', '\\t' should be available.</p> * * <p>The list of "invariant characters" is:<br> * \code * A-Z a-z 0-9 SPACE " % & ' ( ) * + , - . / : ; < = > ? _ * \endcode * <br> * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p> * * <p>This matches the IBM Syntactic Character Set (CS 640).</p> * * <p>In other words, all the graphic characters in 7-bit ASCII should * be safely accessible except the following:</p> * * \code * '\' <backslash> * '[' <left bracket> * ']' <right bracket> * '{' <left brace> * '}' <right brace> * '^' <circumflex> * '~' <tilde> * '!' <exclamation mark> * '#' <number sign> * '\|' <vertical line> * '$' <dollar sign> * '@' <commercial at> * '`' <grave accent> * \endcode * @stable ICU 2.0 / #ifdef U_CHARSET_FAMILY / Use the predefined value. / #elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) \|\| !__CHARSET_LIB) # define U_CHARSET_FAMILY U_EBCDIC_FAMILY #elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__) # define U_CHARSET_FAMILY U_EBCDIC_FAMILY #else # define U_CHARSET_FAMILY U_ASCII_FAMILY #endif /* * \def U_CHARSET_IS_UTF8 * * Hardcode the default charset to UTF-8. * * If this is set to 1, then * - ICU will assume that all non-invariant char, StringPiece, std::string etc. contain UTF-8 text, regardless of what the system API uses * - some ICU code will use fast functions like u_strFromUTF8() * rather than the more general and more heavy-weight conversion API (ucnv.h) * - ucnv_getDefaultName() always returns "UTF-8" * - ucnv_setDefaultName() is disabled and will not change the default charset * - static builds of ICU are smaller * - more functionality is available with the UCONFIG_NO_CONVERSION build-time * configuration option (see unicode/uconfig.h) * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable * * @stable ICU 4.2 * @see UCONFIG_NO_CONVERSION / #ifdef U_CHARSET_IS_UTF8 / Use the predefined value. / #elif U_PLATFORM_IS_LINUX_BASED \|\| U_PLATFORM_IS_DARWIN_BASED \|\| \ U_PLATFORM == U_PF_EMSCRIPTEN # define U_CHARSET_IS_UTF8 1 #else # define U_CHARSET_IS_UTF8 0 #endif /* @} / /===========================================================================/ /* @{ Information about wchar support / /===========================================================================/ /* * \def U_HAVE_WCHAR_H * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default. * * @stable ICU 2.0 / #ifdef U_HAVE_WCHAR_H / Use the predefined value. / #elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9 / * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t. * The type and header existed, but the library functions did not work as expected. * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway. / # define U_HAVE_WCHAR_H 0 #else # define U_HAVE_WCHAR_H 1 #endif /* * \def U_SIZEOF_WCHAR_T * U_SIZEOF_WCHAR_T==sizeof(wchar_t) * * @stable ICU 2.0 / #ifdef U_SIZEOF_WCHAR_T / Use the predefined value. / #elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9) / * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring. * Newer Mac OS X has size 4. / # define U_SIZEOF_WCHAR_T 1 #elif U_PLATFORM_HAS_WIN32_API \|\| U_PLATFORM == U_PF_CYGWIN # define U_SIZEOF_WCHAR_T 2 #elif U_PLATFORM == U_PF_AIX / * AIX 6.1 information, section "Wide character data representation": * "... the wchar_t datatype is 32-bit in the 64-bit environment and * 16-bit in the 32-bit environment." * and * "All locales use Unicode for their wide character code values (process code), * except the IBM-eucTW codeset." / # ifdef __64BIT__ # define U_SIZEOF_WCHAR_T 4 # else # define U_SIZEOF_WCHAR_T 2 # endif #elif U_PLATFORM == U_PF_OS390 / * z/OS V1R11 information center, section "LP64 \| ILP32": * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes. * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes." / # ifdef _LP64 # define U_SIZEOF_WCHAR_T 4 # else # define U_SIZEOF_WCHAR_T 2 # endif #elif U_PLATFORM == U_PF_OS400 # if defined(__UTF32__) / * LOCALETYPE(LOCALEUTF) is specified. Wide-character strings are in UTF-32, * narrow-character strings are in UTF-8. / # define U_SIZEOF_WCHAR_T 4 # elif defined(__UCS2__) / * LOCALETYPE(LOCALEUCS2) is specified. Wide-character strings are in UCS-2, * narrow-character strings are in EBCDIC. / # define U_SIZEOF_WCHAR_T 2 # else / * LOCALETYPE(CLD) or LOCALETYPE(LOCALE) is specified. * Wide-character strings are in 16-bit EBCDIC, * narrow-character strings are in EBCDIC. / # define U_SIZEOF_WCHAR_T 2 # endif #else # define U_SIZEOF_WCHAR_T 4 #endif #ifndef U_HAVE_WCSCPY #define U_HAVE_WCSCPY U_HAVE_WCHAR_H #endif /* @} / /* * \def U_HAVE_CHAR16_T * Defines whether the char16_t type is available for UTF-16 * and u"abc" UTF-16 string literals are supported. * This is a new standard type and standard string literal syntax in C++0x * but has been available in some compilers before. * @internal / #ifdef U_HAVE_CHAR16_T / Use the predefined value. / #else / * Notes: * Visual Studio 2010 (_MSC_VER==1600) defines char16_t as a typedef * and does not support u"abc" string literals. * Visual Studio 2015 (_MSC_VER>=1900) and above adds support for * both char16_t and u"abc" string literals. * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but * does not support u"abc" string literals. * C++11 and C11 require support for UTF-16 literals * TODO: Fix for plain C. Doesn't work on Mac. / # if U_CPLUSPLUS_VERSION >= 11 \|\| (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) # define U_HAVE_CHAR16_T 1 # else # define U_HAVE_CHAR16_T 0 # endif #endif /* * @{ * \def U_DECLARE_UTF16 * Do not use this macro because it is not defined on all platforms. * Use the UNICODE_STRING or U_STRING_DECL macros instead. * @internal / #ifdef U_DECLARE_UTF16 / Use the predefined value. / #elif U_HAVE_CHAR16_T \ \|\| (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \ \|\| (defined(__HP_aCC) && __HP_aCC >= 035000) \ \|\| (defined(__HP_cc) && __HP_cc >= 111106) \ \|\| (defined(U_IN_DOXYGEN)) # define U_DECLARE_UTF16(string) u ## string #elif U_SIZEOF_WCHAR_T == 2 \ && (U_CHARSET_FAMILY == 0 \|\| (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__))) # define U_DECLARE_UTF16(string) L ## string #else / Leave U_DECLARE_UTF16 undefined. See unistr.h. / #endif /* @} / /===========================================================================/ /* @{ Symbol import-export control / /===========================================================================/ #ifdef U_EXPORT / Use the predefined value. / #elif defined(U_STATIC_IMPLEMENTATION) # define U_EXPORT #elif defined(_MSC_VER) \|\| (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \ UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__)) # define U_EXPORT __declspec(dllexport) #elif defined(__GNUC__) # define U_EXPORT __attribute__((visibility("default"))) #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \ \|\| (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550) # define U_EXPORT __global /#elif defined(__HP_aCC) \|\| defined(__HP_cc) # define U_EXPORT __declspec(dllexport)/ #else # define U_EXPORT #endif / U_CALLCONV is related to U_EXPORT2 / #ifdef U_EXPORT2 / Use the predefined value. / #elif defined(_MSC_VER) # define U_EXPORT2 __cdecl #else # define U_EXPORT2 #endif #ifdef U_IMPORT / Use the predefined value. / #elif defined(_MSC_VER) \|\| (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \ UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__)) / Windows needs to export/import data. / # define U_IMPORT __declspec(dllimport) #else # define U_IMPORT #endif /* * \def U_HIDDEN * This is used to mark internal structs declared within external classes, * to prevent the internal structs from having the same visibility as the * class within which they are declared. * @internal / #ifdef U_HIDDEN / Use the predefined value. / #elif defined(__GNUC__) # define U_HIDDEN __attribute__((visibility("hidden"))) #else # define U_HIDDEN #endif /* * \def U_CALLCONV * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary * in callback function typedefs to make sure that the calling convention * is compatible. * * This is only used for non-ICU-API functions. * When a function is a public ICU API, * you must use the U_CAPI and U_EXPORT2 qualifiers. * * Please note, you need to use U_CALLCONV after the . * NO : "static const char U_CALLCONV func( . . . )" YES: "static const char* U_CALLCONV func( . . . )" * * @stable ICU 2.0 / #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus) # define U_CALLCONV __cdecl #else # define U_CALLCONV U_EXPORT2 #endif /* * \def U_CALLCONV_FPTR * Similar to U_CALLCONV, but only used on function pointers. * @internal / #if U_PLATFORM == U_PF_OS390 && defined(__cplusplus) # define U_CALLCONV_FPTR U_CALLCONV #else # define U_CALLCONV_FPTR #endif /* @} */ #endif // _PLATFORM_H Back

Edit File : platform.h | Size : 28.55 KB

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
*   Copyright (C) 1997-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
******************************************************************************
*
*  FILE NAME : platform.h
*
*   Date        Name        Description
*   05/13/98    nos         Creation (content moved here from ptypes.h).
*   03/02/99    stephen     Added AS400 support.
*   03/30/99    stephen     Added Linux support.
*   04/13/99    stephen     Reworked for autoconf.
******************************************************************************
*/

#ifndef _PLATFORM_H
#define _PLATFORM_H

#include "unicode/uconfig.h"
#include "unicode/uvernum.h"

/**
 * \file
 * \brief Basic types for the platform.
 *
 * This file used to be generated by autoconf/configure.
 * Starting with ICU 49, platform.h is a normal source file,
 * to simplify cross-compiling and working with non-autoconf/make build systems.
 *
 * When a value in this file does not work on a platform, then please
 * try to derive it from the U_PLATFORM value
 * (for which we might need a new value constant in rare cases)
 * and/or from other macros that are predefined by the compiler
 * or defined in standard (POSIX or platform or compiler) headers.
 *
 * As a temporary workaround, you can add an explicit \#define for some macros
 * before it is first tested, or add an equivalent -D macro definition
 * to the compiler's command line.
 *
 * Note: Some compilers provide ways to show the predefined macros.
 * For example, with gcc you can compile an empty .c file and have the compiler
 * print the predefined macros with
 * \code
 * gcc -E -dM -x c /dev/null | sort
 * \endcode
 * (You can provide an actual empty .c file rather than /dev/null.
 * <code>-x c++</code> is for C++.)
 */

/**
 * Define some things so that they can be documented.
 * @internal
 */
#ifdef U_IN_DOXYGEN
/*
 * Problem: "platform.h:335: warning: documentation for unknown define U_HAVE_STD_STRING found." means that U_HAVE_STD_STRING is not documented.
 * 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.
 */

/* None for now. */
#endif

/**
 * \def U_PLATFORM
 * The U_PLATFORM macro defines the platform we're on.
 *
 * We used to define one different, value-less macro per platform.
 * That made it hard to know the set of relevant platforms and macros,
 * and hard to deal with variants of platforms.
 *
 * Starting with ICU 49, we define platforms as numeric macros,
 * with ranges of values for related platforms and their variants.
 * The U_PLATFORM macro is set to one of these values.
 *
 * Historical note from the Solaris Wikipedia article:
 * AT&T and Sun collaborated on a project to merge the most popular Unix variants
 * on the market at that time: BSD, System V, and Xenix.
 * This became Unix System V Release 4 (SVR4).
 *
 * @internal
 */

/** Unknown platform. @internal */
#define U_PF_UNKNOWN 0
/** Windows @internal */
#define U_PF_WINDOWS 1000
/** MinGW. Windows, calls to Win32 API, but using GNU gcc and binutils. @internal */
#define U_PF_MINGW 1800
/**
 * Cygwin. Windows, calls to cygwin1.dll for Posix functions,
 * using MSVC or GNU gcc and binutils.
 * @internal
 */
#define U_PF_CYGWIN 1900
/* Reserve 2000 for U_PF_UNIX? */
/** HP-UX is based on UNIX System V. @internal */
#define U_PF_HPUX 2100
/** Solaris is a Unix operating system based on SVR4. @internal */
#define U_PF_SOLARIS 2600
/** BSD is a UNIX operating system derivative. @internal */
#define U_PF_BSD 3000
/** AIX is based on UNIX System V Releases and 4.3 BSD. @internal */
#define U_PF_AIX 3100
/** IRIX is based on UNIX System V with BSD extensions. @internal */
#define U_PF_IRIX 3200
/**
 * Darwin is a POSIX-compliant operating system, composed of code developed by Apple,
 * as well as code derived from NeXTSTEP, BSD, and other projects,
 * built around the Mach kernel.
 * Darwin forms the core set of components upon which Mac OS X, Apple TV, and iOS are based.
 * (Original description modified from WikiPedia.)
 * @internal
 */
#define U_PF_DARWIN 3500
/** iPhone OS (iOS) is a derivative of Mac OS X. @internal */
#define U_PF_IPHONE 3550
/** QNX is a commercial Unix-like real-time operating system related to BSD. @internal */
#define U_PF_QNX 3700
/** Linux is a Unix-like operating system. @internal */
#define U_PF_LINUX 4000
/**
 * Native Client is pretty close to Linux.
 * See https://developer.chrome.com/native-client and
 *  http://www.chromium.org/nativeclient
 *  @internal
 */
#define U_PF_BROWSER_NATIVE_CLIENT 4020
/** Android is based on Linux. @internal */
#define U_PF_ANDROID 4050
/** Fuchsia is a POSIX-ish platform. @internal */
#define U_PF_FUCHSIA 4100
/* Maximum value for Linux-based platform is 4499 */
/**
 * Emscripten is a C++ transpiler for the Web that can target asm.js or
 * WebAssembly. It provides some POSIX-compatible wrappers and stubs and
 * some Linux-like functionality, but is not fully compatible with
 * either.
 * @internal
 */
#define U_PF_EMSCRIPTEN 5010
/** z/OS is the successor to OS/390 which was the successor to MVS. @internal */
#define U_PF_OS390 9000
/** "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal */
#define U_PF_OS400 9400

#ifdef U_PLATFORM
 /* Use the predefined value. */
#elif defined(__MINGW32__)
# define U_PLATFORM U_PF_MINGW
#elif defined(__CYGWIN__)
# define U_PLATFORM U_PF_CYGWIN
#elif defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
# define U_PLATFORM U_PF_WINDOWS
#elif defined(__ANDROID__)
# define U_PLATFORM U_PF_ANDROID
 /* Android wchar_t support depends on the API level. */
# include <android/api-level.h>
#elif defined(__pnacl__) || defined(__native_client__)
# define U_PLATFORM U_PF_BROWSER_NATIVE_CLIENT
#elif defined(__Fuchsia__)
# define U_PLATFORM U_PF_FUCHSIA
#elif defined(linux) || defined(__linux__) || defined(__linux)
# define U_PLATFORM U_PF_LINUX
#elif defined(__APPLE__) && defined(__MACH__)
# include <TargetConditionals.h>
# if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) && (defined(TARGET_OS_MACCATALYST) && !TARGET_OS_MACCATALYST) /* variant of TARGET_OS_MAC */
# define U_PLATFORM U_PF_IPHONE
# else
# define U_PLATFORM U_PF_DARWIN
# endif
#elif defined(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MirBSD__)
# if defined(__FreeBSD__)
# include <sys/endian.h>
# endif
# define U_PLATFORM U_PF_BSD
#elif defined(sun) || defined(__sun)
 /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
# define U_PLATFORM U_PF_SOLARIS
# if defined(__GNUC__)
 /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
 * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
 * is included which does not include this header file.
 */
# include <sys/isa_defs.h>
# endif
#elif defined(_AIX) || defined(__TOS_AIX__)
# define U_PLATFORM U_PF_AIX
#elif defined(_hpux) || defined(hpux) || defined(__hpux)
# define U_PLATFORM U_PF_HPUX
#elif defined(sgi) || defined(__sgi)
# define U_PLATFORM U_PF_IRIX
#elif defined(__QNX__) || defined(__QNXNTO__)
# define U_PLATFORM U_PF_QNX
#elif defined(__TOS_MVS__)
# define U_PLATFORM U_PF_OS390
#elif defined(__OS400__) || defined(__TOS_OS400__)
# define U_PLATFORM U_PF_OS400
#elif defined(__EMSCRIPTEN__)
# define U_PLATFORM U_PF_EMSCRIPTEN
#else
# define U_PLATFORM U_PF_UNKNOWN
#endif

/**
 * \def CYGWINMSVC
 * Defined if this is Windows with Cygwin, but using MSVC rather than gcc.
 * Otherwise undefined.
 * @internal
 */
/* Commented out because this is already set in mh-cygwin-msvc
#if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER)
#   define CYGWINMSVC
#endif
*/
#ifdef U_IN_DOXYGEN
#   define CYGWINMSVC
#endif

/**
 * \def U_PLATFORM_USES_ONLY_WIN32_API
 * Defines whether the platform uses only the Win32 API.
 * Set to 1 for Windows/MSVC and MinGW but not Cygwin.
 * @internal
 */
#ifdef U_PLATFORM_USES_ONLY_WIN32_API
 /* Use the predefined value. */
#elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) || defined(CYGWINMSVC)
# define U_PLATFORM_USES_ONLY_WIN32_API 1
#else
 /* Cygwin implements POSIX. */
# define U_PLATFORM_USES_ONLY_WIN32_API 0
#endif

/**
 * \def U_PLATFORM_HAS_WIN32_API
 * Defines whether the Win32 API is available on the platform.
 * Set to 1 for Windows/MSVC, MinGW and Cygwin.
 * @internal
 */
#ifdef U_PLATFORM_HAS_WIN32_API
 /* Use the predefined value. */
#elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
# define U_PLATFORM_HAS_WIN32_API 1
#else
# define U_PLATFORM_HAS_WIN32_API 0
#endif

/**
 * \def U_PLATFORM_HAS_WINUWP_API
 * Defines whether target is intended for Universal Windows Platform API
 * Set to 1 for Windows10 Release Solution Configuration
 * @internal
 */
#ifdef U_PLATFORM_HAS_WINUWP_API
    /* Use the predefined value. */
#else
#   define U_PLATFORM_HAS_WINUWP_API 0
#endif

/**
 * \def U_PLATFORM_IMPLEMENTS_POSIX
 * Defines whether the platform implements (most of) the POSIX API.
 * Set to 1 for Cygwin and most other platforms.
 * @internal
 */
#ifdef U_PLATFORM_IMPLEMENTS_POSIX
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
#   define U_PLATFORM_IMPLEMENTS_POSIX 0
#else
#   define U_PLATFORM_IMPLEMENTS_POSIX 1
#endif

/**
 * \def U_PLATFORM_IS_LINUX_BASED
 * Defines whether the platform is Linux or one of its derivatives.
 * @internal
 */
#ifdef U_PLATFORM_IS_LINUX_BASED
 /* Use the predefined value. */
#elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= 4499
# define U_PLATFORM_IS_LINUX_BASED 1
#else
# define U_PLATFORM_IS_LINUX_BASED 0
#endif

/**
 * \def U_PLATFORM_IS_DARWIN_BASED
 * Defines whether the platform is Darwin or one of its derivatives.
 * @internal
 */
#ifdef U_PLATFORM_IS_DARWIN_BASED
 /* Use the predefined value. */
#elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE
# define U_PLATFORM_IS_DARWIN_BASED 1
#else
# define U_PLATFORM_IS_DARWIN_BASED 0
#endif

/**
 * \def U_HAVE_STDINT_H
 * Defines whether stdint.h is available. It is a C99 standard header.
 * We used to include inttypes.h which includes stdint.h but we usually do not need
 * the additional definitions from inttypes.h.
 * @internal
 */
#ifdef U_HAVE_STDINT_H
 /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
# if defined(__BORLANDC__) || U_PLATFORM == U_PF_MINGW || (defined(_MSC_VER) && _MSC_VER>=1600)
 /* Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. */
# define U_HAVE_STDINT_H 1
# else
# define U_HAVE_STDINT_H 0
# endif
#elif U_PLATFORM == U_PF_SOLARIS
 /* Solaris has inttypes.h but not stdint.h. */
# define U_HAVE_STDINT_H 0
#elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
# define U_HAVE_STDINT_H 0
#else
# define U_HAVE_STDINT_H 1
#endif

/**
 * \def U_HAVE_INTTYPES_H
 * Defines whether inttypes.h is available. It is a C99 standard header.
 * We include inttypes.h where it is available but stdint.h is not.
 * @internal
 */
#ifdef U_HAVE_INTTYPES_H
 /* Use the predefined value. */
#elif U_PLATFORM == U_PF_SOLARIS
 /* Solaris has inttypes.h but not stdint.h. */
# define U_HAVE_INTTYPES_H 1
#elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
 /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
# define U_HAVE_INTTYPES_H 1
#else
 /* Most platforms have both inttypes.h and stdint.h, or neither. */
# define U_HAVE_INTTYPES_H U_HAVE_STDINT_H
#endif

/*===========================================================================*/
/** @{ Compiler and environment features                                     */
/*===========================================================================*/

/**
 * \def U_GCC_MAJOR_MINOR
 * Indicates whether the compiler is gcc (test for != 0),
 * and if so, contains its major (times 100) and minor version numbers.
 * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0.
 *
 * For example, for testing for whether we have gcc, and whether it's 4.6 or higher,
 * use "#if U_GCC_MAJOR_MINOR >= 406".
 * @internal
 */
#ifdef __GNUC__
#   define U_GCC_MAJOR_MINOR (__GNUC__ * 100 + __GNUC_MINOR__)
#else
#   define U_GCC_MAJOR_MINOR 0
#endif

/**
 * \def U_IS_BIG_ENDIAN
 * Determines the endianness of the platform.
 * @internal
 */
#ifdef U_IS_BIG_ENDIAN
    /* Use the predefined value. */
#elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
#   define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
    /* gcc */
#   define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
#   define U_IS_BIG_ENDIAN 1
#elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
#   define U_IS_BIG_ENDIAN 0
#elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400 || defined(__s390__) || defined(__s390x__)
    /* These platforms do not appear to predefine any endianness macros. */
#   define U_IS_BIG_ENDIAN 1
#elif defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0)
    /* HPPA do not appear to predefine any endianness macros. */
#   define U_IS_BIG_ENDIAN 1
#elif defined(sparc) || defined(__sparc) || defined(__sparc__)
    /* Some sparc based systems (e.g. Linux) do not predefine any endianness macros. */
#   define U_IS_BIG_ENDIAN 1
#else
#   define U_IS_BIG_ENDIAN 0
#endif

/**
 * \def U_HAVE_PLACEMENT_NEW
 * Determines whether to override placement new and delete for STL.
 * @stable ICU 2.6
 */
#ifdef U_HAVE_PLACEMENT_NEW
    /* Use the predefined value. */
#elif defined(__BORLANDC__)
#   define U_HAVE_PLACEMENT_NEW 0
#else
#   define U_HAVE_PLACEMENT_NEW 1
#endif

/**
 * \def U_HAVE_DEBUG_LOCATION_NEW 
 * Define this to define the MFC debug version of the operator new.
 *
 * @stable ICU 3.4
 */
#ifdef U_HAVE_DEBUG_LOCATION_NEW
    /* Use the predefined value. */
#elif defined(_MSC_VER)
#   define U_HAVE_DEBUG_LOCATION_NEW 1
#else
#   define U_HAVE_DEBUG_LOCATION_NEW 0
#endif

/* Compatibility with compilers other than clang: http://clang.llvm.org/docs/LanguageExtensions.html */
#ifdef __has_attribute
#   define UPRV_HAS_ATTRIBUTE(x) __has_attribute(x)
#else
#   define UPRV_HAS_ATTRIBUTE(x) 0
#endif
#ifdef __has_cpp_attribute
#   define UPRV_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
#else
#   define UPRV_HAS_CPP_ATTRIBUTE(x) 0
#endif
#ifdef __has_declspec_attribute
#   define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) __has_declspec_attribute(x)
#else
#   define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) 0
#endif
#ifdef __has_builtin
#   define UPRV_HAS_BUILTIN(x) __has_builtin(x)
#else
#   define UPRV_HAS_BUILTIN(x) 0
#endif
#ifdef __has_feature
#   define UPRV_HAS_FEATURE(x) __has_feature(x)
#else
#   define UPRV_HAS_FEATURE(x) 0
#endif
#ifdef __has_extension
#   define UPRV_HAS_EXTENSION(x) __has_extension(x)
#else
#   define UPRV_HAS_EXTENSION(x) 0
#endif
#ifdef __has_warning
#   define UPRV_HAS_WARNING(x) __has_warning(x)
#else
#   define UPRV_HAS_WARNING(x) 0
#endif

/**
 * \def U_MALLOC_ATTR
 * Attribute to mark functions as malloc-like
 * @internal
 */
#if defined(__GNUC__) && __GNUC__>=3
#    define U_MALLOC_ATTR __attribute__ ((__malloc__))
#else
#    define U_MALLOC_ATTR
#endif

/**
 * \def U_ALLOC_SIZE_ATTR
 * Attribute to specify the size of the allocated buffer for malloc-like functions
 * @internal
 */
#if (defined(__GNUC__) &&                                            \
        (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \
        UPRV_HAS_ATTRIBUTE(alloc_size)
#   define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X)))
#   define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y)))
#else
#   define U_ALLOC_SIZE_ATTR(X)
#   define U_ALLOC_SIZE_ATTR2(X,Y)
#endif

/**
 * \def U_CPLUSPLUS_VERSION
 * 0 if no C++; 1, 11, 14, ... if C++.
 * Support for specific features cannot always be determined by the C++ version alone.
 * @internal
 */
#ifdef U_CPLUSPLUS_VERSION
#   if U_CPLUSPLUS_VERSION != 0 && !defined(__cplusplus)
#       undef U_CPLUSPLUS_VERSION
#       define U_CPLUSPLUS_VERSION 0
#   endif
    /* Otherwise use the predefined value. */
#elif !defined(__cplusplus)
#   define U_CPLUSPLUS_VERSION 0
#elif __cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L)
#   define U_CPLUSPLUS_VERSION 14
#elif __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
#   define U_CPLUSPLUS_VERSION 11
#else
    // C++98 or C++03
#   define U_CPLUSPLUS_VERSION 1
#endif

#if (U_PLATFORM == U_PF_AIX || U_PLATFORM == U_PF_OS390) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11)
// add in std::nullptr_t
namespace std {
 typedef decltype(nullptr) nullptr_t;
};
#endif

/**
 * \def U_NOEXCEPT
 * "noexcept" if supported, otherwise empty.
 * Some code, especially STL containers, uses move semantics of objects only
 * if the move constructor and the move operator are declared as not throwing exceptions.
 * @internal
 */
#ifdef U_NOEXCEPT
    /* Use the predefined value. */
#else
#   define U_NOEXCEPT noexcept
#endif

/**
 * \def U_FALLTHROUGH
 * Annotate intentional fall-through between switch labels.
 * http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
 * @internal
 */
#ifndef __cplusplus
    // Not for C.
#elif defined(U_FALLTHROUGH)
    // Use the predefined value.
#elif defined(__clang__)
    // Test for compiler vs. feature separately.
    // Other compilers might choke on the feature test.
#    if UPRV_HAS_CPP_ATTRIBUTE(clang::fallthrough) || \
             (UPRV_HAS_FEATURE(cxx_attributes) &&     \
             UPRV_HAS_WARNING("-Wimplicit-fallthrough"))
#       define U_FALLTHROUGH [[clang::fallthrough]]
#   endif
#elif defined(__GNUC__) && (__GNUC__ >= 7)
#   define U_FALLTHROUGH __attribute__((fallthrough))
#endif

#ifndef U_FALLTHROUGH
#   define U_FALLTHROUGH
#endif

/** @} */

/*===========================================================================*/
/** @{ Character data types                                                  */
/*===========================================================================*/

/**
 * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
 * @stable ICU 2.0
 */
#define U_ASCII_FAMILY 0

/**
 * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
 * @stable ICU 2.0
 */
#define U_EBCDIC_FAMILY 1

/**
 * \def U_CHARSET_FAMILY
 *
 * These definitions allow to specify the encoding of text
 * in the char data type as defined by the platform and the compiler.
 * It is enough to determine the code point values of "invariant characters",
 * which are the ones shared by all encodings that are in use
 * on a given platform.
 *
 * Those "invariant characters" should be all the uppercase and lowercase
 * latin letters, the digits, the space, and "basic punctuation".
 * Also, '\\n', '\\r', '\\t' should be available.
 *
 * The list of "invariant characters" is: 
 * \code
 * A-Z a-z 0-9 SPACE " % &amp; ' ( ) * + , - . / : ; < = > ? _
 * \endcode
 * 
 * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)
 *
 * This matches the IBM Syntactic Character Set (CS 640).
 *
 * In other words, all the graphic characters in 7-bit ASCII should
 * be safely accessible except the following:
 *
 * \code
 * '\' <backslash>
 * '[' <left bracket>
 * ']' <right bracket>
 * '{' <left brace>
 * '}' <right brace>
 * '^' <circumflex>
 * '~' <tilde>
 * '!' <exclamation mark>
 * '#' <number sign>
 * '|' <vertical line>
 * '$' <dollar sign>
 * '@' <commercial at>
 * '`' <grave accent>
 * \endcode
 * @stable ICU 2.0
 */
#ifdef U_CHARSET_FAMILY
 /* Use the predefined value. */
#elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
# define U_CHARSET_FAMILY U_EBCDIC_FAMILY
#elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
# define U_CHARSET_FAMILY U_EBCDIC_FAMILY
#else
# define U_CHARSET_FAMILY U_ASCII_FAMILY
#endif

/**
 * \def U_CHARSET_IS_UTF8
 *
 * Hardcode the default charset to UTF-8.
 *
 * If this is set to 1, then
 * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
 *   contain UTF-8 text, regardless of what the system API uses
 * - some ICU code will use fast functions like u_strFromUTF8()
 *   rather than the more general and more heavy-weight conversion API (ucnv.h)
 * - ucnv_getDefaultName() always returns "UTF-8"
 * - ucnv_setDefaultName() is disabled and will not change the default charset
 * - static builds of ICU are smaller
 * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
 *   configuration option (see unicode/uconfig.h)
 * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
 *
 * @stable ICU 4.2
 * @see UCONFIG_NO_CONVERSION
 */
#ifdef U_CHARSET_IS_UTF8
    /* Use the predefined value. */
#elif U_PLATFORM_IS_LINUX_BASED || U_PLATFORM_IS_DARWIN_BASED || \
        U_PLATFORM == U_PF_EMSCRIPTEN
#   define U_CHARSET_IS_UTF8 1
#else
#   define U_CHARSET_IS_UTF8 0
#endif

/** @} */

/*===========================================================================*/
/** @{ Information about wchar support                                       */
/*===========================================================================*/

/**
 * \def U_HAVE_WCHAR_H
 * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
 *
 * @stable ICU 2.0
 */
#ifdef U_HAVE_WCHAR_H
 /* Use the predefined value. */
#elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
 /*
 * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
 * The type and header existed, but the library functions did not work as expected.
 * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
 */
# define U_HAVE_WCHAR_H 0
#else
# define U_HAVE_WCHAR_H 1
#endif

/**
 * \def U_SIZEOF_WCHAR_T
 * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
 *
 * @stable ICU 2.0
 */
#ifdef U_SIZEOF_WCHAR_T
 /* Use the predefined value. */
#elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9)
 /*
 * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
 * Newer Mac OS X has size 4.
 */
# define U_SIZEOF_WCHAR_T 1
#elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
# define U_SIZEOF_WCHAR_T 2
#elif U_PLATFORM == U_PF_AIX
 /*
 * AIX 6.1 information, section "Wide character data representation":
 * "... the wchar_t datatype is 32-bit in the 64-bit environment and
 * 16-bit in the 32-bit environment."
 * and
 * "All locales use Unicode for their wide character code values (process code),
 * except the IBM-eucTW codeset."
 */
# ifdef __64BIT__
# define U_SIZEOF_WCHAR_T 4
# else
# define U_SIZEOF_WCHAR_T 2
# endif
#elif U_PLATFORM == U_PF_OS390
 /*
 * z/OS V1R11 information center, section "LP64 | ILP32":
 * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
 * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
 */
# ifdef _LP64
# define U_SIZEOF_WCHAR_T 4
# else
# define U_SIZEOF_WCHAR_T 2
# endif
#elif U_PLATFORM == U_PF_OS400
# if defined(__UTF32__)
 /*
 * LOCALETYPE(*LOCALEUTF) is specified.
 * Wide-character strings are in UTF-32,
 * narrow-character strings are in UTF-8.
 */
# define U_SIZEOF_WCHAR_T 4
# elif defined(__UCS2__)
 /*
 * LOCALETYPE(*LOCALEUCS2) is specified.
 * Wide-character strings are in UCS-2,
 * narrow-character strings are in EBCDIC.
 */
# define U_SIZEOF_WCHAR_T 2
# else
 /*
 * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
 * Wide-character strings are in 16-bit EBCDIC,
 * narrow-character strings are in EBCDIC.
 */
# define U_SIZEOF_WCHAR_T 2
# endif
#else
# define U_SIZEOF_WCHAR_T 4
#endif

#ifndef U_HAVE_WCSCPY
#define U_HAVE_WCSCPY U_HAVE_WCHAR_H
#endif

/** @} */

/**
 * \def U_HAVE_CHAR16_T
 * Defines whether the char16_t type is available for UTF-16
 * and u"abc" UTF-16 string literals are supported.
 * This is a new standard type and standard string literal syntax in C++0x
 * but has been available in some compilers before.
 * @internal
 */
#ifdef U_HAVE_CHAR16_T
    /* Use the predefined value. */
#else
    /*
     * Notes:
     * Visual Studio 2010 (_MSC_VER==1600) defines char16_t as a typedef
     * and does not support u"abc" string literals.
     * Visual Studio 2015 (_MSC_VER>=1900) and above adds support for
     * both char16_t and u"abc" string literals.
     * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
     * does not support u"abc" string literals.
     * C++11 and C11 require support for UTF-16 literals
     * TODO: Fix for plain C. Doesn't work on Mac.
     */
#   if U_CPLUSPLUS_VERSION >= 11 || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
#       define U_HAVE_CHAR16_T 1
#   else
#       define U_HAVE_CHAR16_T 0
#   endif
#endif

/**
 * @{
 * \def U_DECLARE_UTF16
 * Do not use this macro because it is not defined on all platforms.
 * Use the UNICODE_STRING or U_STRING_DECL macros instead.
 * @internal
 */
#ifdef U_DECLARE_UTF16
 /* Use the predefined value. */
#elif U_HAVE_CHAR16_T \
 || (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
 || (defined(__HP_aCC) && __HP_aCC >= 035000) \
 || (defined(__HP_cc) && __HP_cc >= 111106) \
 || (defined(U_IN_DOXYGEN))
# define U_DECLARE_UTF16(string) u ## string
#elif U_SIZEOF_WCHAR_T == 2 \
 && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
# define U_DECLARE_UTF16(string) L ## string
#else
 /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
#endif

/** @} */

/*===========================================================================*/
/** @{ Symbol import-export control                                          */
/*===========================================================================*/

#ifdef U_EXPORT
    /* Use the predefined value. */
#elif defined(U_STATIC_IMPLEMENTATION)
#   define U_EXPORT
#elif defined(_MSC_VER) || (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \
                            UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
#   define U_EXPORT __declspec(dllexport)
#elif defined(__GNUC__)
#   define U_EXPORT __attribute__((visibility("default")))
#elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
   || (defined(__SUNPRO_C) && __SUNPRO_C >= 0x550) 
#   define U_EXPORT __global
/*#elif defined(__HP_aCC) || defined(__HP_cc)
#   define U_EXPORT __declspec(dllexport)*/
#else
#   define U_EXPORT
#endif

/* U_CALLCONV is related to U_EXPORT2 */
#ifdef U_EXPORT2
    /* Use the predefined value. */
#elif defined(_MSC_VER)
#   define U_EXPORT2 __cdecl
#else
#   define U_EXPORT2
#endif

#ifdef U_IMPORT
    /* Use the predefined value. */
#elif defined(_MSC_VER) || (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \
                            UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
    /* Windows needs to export/import data. */
#   define U_IMPORT __declspec(dllimport)
#else
#   define U_IMPORT 
#endif

/**
 * \def U_HIDDEN
 * This is used to mark internal structs declared within external classes,
 * to prevent the internal structs from having the same visibility as the
 * class within which they are declared. 
 * @internal
 */
#ifdef U_HIDDEN
    /* Use the predefined value. */
#elif defined(__GNUC__)
#   define U_HIDDEN __attribute__((visibility("hidden")))
#else
#   define U_HIDDEN 
#endif

/**
 * \def U_CALLCONV
 * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
 * in callback function typedefs to make sure that the calling convention
 * is compatible.
 *
 * This is only used for non-ICU-API functions.
 * When a function is a public ICU API,
 * you must use the U_CAPI and U_EXPORT2 qualifiers.
 *
 * Please note, you need to use U_CALLCONV after the *.
 *
 * NO : "static const char U_CALLCONV *func( . . . )"
 * YES: "static const char* U_CALLCONV func( . . . )"
 *
 * @stable ICU 2.0
 */
#if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
#    define U_CALLCONV __cdecl
#else
#    define U_CALLCONV U_EXPORT2
#endif

/**
 * \def U_CALLCONV_FPTR
 * Similar to U_CALLCONV, but only used on function pointers.
 * @internal
 */
#if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
#    define U_CALLCONV_FPTR U_CALLCONV
#else
#    define U_CALLCONV_FPTR
#endif
/** @} */

#endif  // _PLATFORM_H

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