* 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 <code>#define</code> for some macros
+ * 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.
*
/** 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_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
# define CYGWINMSVC
#endif
*/
+#ifdef U_IN_DOXYGEN
+# define CYGWINMSVC
+#endif
/**
* \def U_PLATFORM_USES_ONLY_WIN32_API
#endif
/* Compatibility with compilers other than clang: http://clang.llvm.org/docs/LanguageExtensions.html */
-#ifndef __has_attribute
-# define __has_attribute(x) 0
+#ifdef __has_attribute
+# define UPRV_HAS_ATTRIBUTE(x) __has_attribute(x)
+#else
+# define UPRV_HAS_ATTRIBUTE(x) 0
#endif
-#ifndef __has_cpp_attribute
-# define __has_cpp_attribute(x) 0
+#ifdef __has_cpp_attribute
+# define UPRV_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define UPRV_HAS_CPP_ATTRIBUTE(x) 0
#endif
-#ifndef __has_builtin
-# define __has_builtin(x) 0
+#ifdef __has_declspec_attribute
+# define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) __has_declspec_attribute(x)
+#else
+# define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) 0
#endif
-#ifndef __has_feature
-# define __has_feature(x) 0
+#ifdef __has_builtin
+# define UPRV_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define UPRV_HAS_BUILTIN(x) 0
#endif
-#ifndef __has_extension
-# define __has_extension(x) 0
+#ifdef __has_feature
+# define UPRV_HAS_FEATURE(x) __has_feature(x)
+#else
+# define UPRV_HAS_FEATURE(x) 0
#endif
-#ifndef __has_warning
-# define __has_warning(x) 0
+#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
/**
* Attribute to specify the size of the allocated buffer for malloc-like functions
* @internal
*/
-#if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || __has_attribute(alloc_size)
+#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
*/
#ifdef U_NOEXCEPT
/* Use the predefined value. */
-#elif defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS /* Visual Studio */
-# define U_NOEXCEPT
-#elif U_CPLUSPLUS_VERSION >= 11 || __has_feature(cxx_noexcept) || __has_extension(cxx_noexcept) \
- || (defined(_MSC_VER) && _MSC_VER >= 1900) /* Visual Studio 2015 */
-# define U_NOEXCEPT noexcept
#else
-# define U_NOEXCEPT
+# define U_NOEXCEPT noexcept
#endif
/**
#elif defined(__clang__)
// Test for compiler vs. feature separately.
// Other compilers might choke on the feature test.
-# if __has_cpp_attribute(clang::fallthrough) || \
- (__has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough"))
+# 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
*/
#ifdef U_CHARSET_IS_UTF8
/* Use the predefined value. */
-#elif U_PLATFORM_IS_LINUX_BASED || U_PLATFORM_IS_DARWIN_BASED
+#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
* narrow-character strings are in EBCDIC.
*/
# define U_SIZEOF_WCHAR_T 2
-#else
+# else
/*
* LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
* Wide-character strings are in 16-bit EBCDIC,
#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(__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__)))
/* 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) \
# define U_EXPORT __global
/*#elif defined(__HP_aCC) || defined(__HP_cc)
# define U_EXPORT __declspec(dllexport)*/
-#elif defined(_MSC_VER)
-# define U_EXPORT __declspec(dllexport)
#else
# define U_EXPORT
#endif
#ifdef U_IMPORT
/* Use the predefined value. */
-#elif defined(_MSC_VER)
+#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
#endif
/* @} */
-#endif
+#endif // _PLATFORM_H
projects / apple / icu.git / blobdiff