tor-browser

platform.h (27841B)

---

// © 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
/** Haiku is a POSIX-ish platform. @internal */
#define U_PF_HAIKU 4080
/** 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
   /* Cygwin uchar.h doesn't exist until Cygwin 3.5. */
#   include <cygwin/version.h>
#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(__HAIKU__)
#   define U_PLATFORM U_PF_HAIKU
#elif defined(__EMSCRIPTEN__)
#   define U_PLATFORM U_PF_EMSCRIPTEN
#else
#   define U_PLATFORM U_PF_UNKNOWN
#endif

/**
* \def U_REAL_MSVC
* Defined if the compiler is the real MSVC compiler (and not something like
* Clang setting _MSC_VER in order to compile Windows code that requires it).
* Otherwise undefined.
* @internal
*/
#if (defined(_MSC_VER) && !(defined(__clang__) && __clang__)) || defined(U_IN_DOXYGEN)
#   define U_REAL_MSVC
#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, ClangCL 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, ClangCL, 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

/*===========================================================================*/
/** @{ 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_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


#if defined(__clang__)
#define UPRV_NO_SANITIZE_UNDEFINED __attribute__((no_sanitize("undefined")))
#else
#define UPRV_NO_SANITIZE_UNDEFINED
#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
// The value of _MSVC_LANG for C++23 preview is undocumented, except that it is larger than 202002.
// As of this writing, it is 202004.
#elif __cplusplus >= 202302L || (defined(_MSVC_LANG) && _MSVC_LANG > 202002L)
#   define U_CPLUSPLUS_VERSION 23
#elif __cplusplus >= 202002L || (defined(_MSVC_LANG) && _MSVC_LANG >= 202002L)
#   define U_CPLUSPLUS_VERSION 20
#elif __cplusplus >= 201703L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
#   define U_CPLUSPLUS_VERSION 17
#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

/**
* \def U_FALLTHROUGH
* Annotate intentional fall-through between switch labels.
* https://clang.llvm.org/docs/AttributeReference.html#fallthrough
* @internal
*/
#if 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  "  %  &amp;  '  (  )  *  +  ,  -  .  /  :  ;  <  =  >  ?  _
* \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++11
* but has been available in some compilers before.
* @internal
*/
#ifdef U_HAVE_CHAR16_T
   /* Use the predefined value. */
#else
   /*
    * Notes:
    * C++11 and C11 require support for UTF-16 literals
    * Doesn't work on Mac C11 (see workaround in ptypes.h)
    * or Cygwin less than 3.5.
    */
#   if defined(__cplusplus)
#       define U_HAVE_CHAR16_T 1
#   elif U_PLATFORM_IS_DARWIN_BASED || (U_PLATFORM == U_PF_CYGWIN && CYGWIN_VERSION_DLL_MAJOR < 3005)
#       define U_HAVE_CHAR16_T 0
#   else
       // conformant C11
#       define U_HAVE_CHAR16_T 1
#   endif
#endif

/**
* @{
* \def U_DECLARE_UTF16
* Do not use this macro because it is not defined on all platforms.
* In C++, use std::u16string_view literals, see the UNICODE_STRING docs.
* In C, use u"UTF-16 literals".
* See also the public U_STRING_DECL macro.
* @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__) || defined(__open_xl__)
#   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__) || defined(__open_xl__)
#   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