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 \#define 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/** Fuchsia is a POSIX-ish platform. @internal */
136#define U_PF_FUCHSIA 4100
137/* Maximum value for Linux-based platform is 4499 */
138/**
139 * Emscripten is a C++ transpiler for the Web that can target asm.js or
140 * WebAssembly. It provides some POSIX-compatible wrappers and stubs and
141 * some Linux-like functionality, but is not fully compatible with
142 * either.
143 * @internal
144 */
145#define U_PF_EMSCRIPTEN 5010
146/** z/OS is the successor to OS/390 which was the successor to MVS. @internal */
147#define U_PF_OS390 9000
148/** "IBM i" is the current name of what used to be i5/OS and earlier OS/400. @internal */
149#define U_PF_OS400 9400
150
151#ifdef U_PLATFORM
152 /* Use the predefined value. */
153#elif defined(__MINGW32__)
154# define U_PLATFORM U_PF_MINGW
155#elif defined(__CYGWIN__)
156# define U_PLATFORM U_PF_CYGWIN
157#elif defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
158# define U_PLATFORM U_PF_WINDOWS
159#elif defined(__ANDROID__)
160# define U_PLATFORM U_PF_ANDROID
161 /* Android wchar_t support depends on the API level. */
162# include <android/api-level.h>
163#elif defined(__pnacl__) || defined(__native_client__)
164# define U_PLATFORM U_PF_BROWSER_NATIVE_CLIENT
165#elif defined(__Fuchsia__)
166# define U_PLATFORM U_PF_FUCHSIA
167#elif defined(linux) || defined(__linux__) || defined(__linux)
168# define U_PLATFORM U_PF_LINUX
169#elif defined(__APPLE__) && defined(__MACH__)
170# include <TargetConditionals.h>
171# if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE /* variant of TARGET_OS_MAC */
172# define U_PLATFORM U_PF_IPHONE
173# else
174# define U_PLATFORM U_PF_DARWIN
175# endif
176#elif defined(BSD) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MirBSD__)
177# if defined(__FreeBSD__)
178# include <sys/endian.h>
179# endif
180# define U_PLATFORM U_PF_BSD
181#elif defined(sun) || defined(__sun)
182 /* Check defined(__SVR4) || defined(__svr4__) to distinguish Solaris from SunOS? */
183# define U_PLATFORM U_PF_SOLARIS
184# if defined(__GNUC__)
185 /* Solaris/GCC needs this header file to get the proper endianness. Normally, this
186 * header file is included with stddef.h but on Solairs/GCC, the GCC version of stddef.h
187 * is included which does not include this header file.
188 */
189# include <sys/isa_defs.h>
190# endif
191#elif defined(_AIX) || defined(__TOS_AIX__)
192# define U_PLATFORM U_PF_AIX
193#elif defined(_hpux) || defined(hpux) || defined(__hpux)
194# define U_PLATFORM U_PF_HPUX
195#elif defined(sgi) || defined(__sgi)
196# define U_PLATFORM U_PF_IRIX
197#elif defined(__QNX__) || defined(__QNXNTO__)
198# define U_PLATFORM U_PF_QNX
199#elif defined(__TOS_MVS__)
200# define U_PLATFORM U_PF_OS390
201#elif defined(__OS400__) || defined(__TOS_OS400__)
202# define U_PLATFORM U_PF_OS400
203#elif defined(__EMSCRIPTEN__)
204# define U_PLATFORM U_PF_EMSCRIPTEN
205#else
206# define U_PLATFORM U_PF_UNKNOWN
207#endif
208
209/**
210 * \def CYGWINMSVC
211 * Defined if this is Windows with Cygwin, but using MSVC rather than gcc.
212 * Otherwise undefined.
213 * @internal
214 */
215/* Commented out because this is already set in mh-cygwin-msvc
216#if U_PLATFORM == U_PF_CYGWIN && defined(_MSC_VER)
217# define CYGWINMSVC
218#endif
219*/
220#ifdef U_IN_DOXYGEN
221# define CYGWINMSVC
222#endif
223
224/**
225 * \def U_PLATFORM_USES_ONLY_WIN32_API
226 * Defines whether the platform uses only the Win32 API.
227 * Set to 1 for Windows/MSVC and MinGW but not Cygwin.
228 * @internal
229 */
230#ifdef U_PLATFORM_USES_ONLY_WIN32_API
231 /* Use the predefined value. */
232#elif (U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_MINGW) || defined(CYGWINMSVC)
233# define U_PLATFORM_USES_ONLY_WIN32_API 1
234#else
235 /* Cygwin implements POSIX. */
236# define U_PLATFORM_USES_ONLY_WIN32_API 0
237#endif
238
239/**
240 * \def U_PLATFORM_HAS_WIN32_API
241 * Defines whether the Win32 API is available on the platform.
242 * Set to 1 for Windows/MSVC, MinGW and Cygwin.
243 * @internal
244 */
245#ifdef U_PLATFORM_HAS_WIN32_API
246 /* Use the predefined value. */
247#elif U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
248# define U_PLATFORM_HAS_WIN32_API 1
249#else
250# define U_PLATFORM_HAS_WIN32_API 0
251#endif
252
253/**
254 * \def U_PLATFORM_HAS_WINUWP_API
255 * Defines whether target is intended for Universal Windows Platform API
256 * Set to 1 for Windows10 Release Solution Configuration
257 * @internal
258 */
259#ifdef U_PLATFORM_HAS_WINUWP_API
260 /* Use the predefined value. */
261#else
262# define U_PLATFORM_HAS_WINUWP_API 0
263#endif
264
265/**
266 * \def U_PLATFORM_IMPLEMENTS_POSIX
267 * Defines whether the platform implements (most of) the POSIX API.
268 * Set to 1 for Cygwin and most other platforms.
269 * @internal
270 */
271#ifdef U_PLATFORM_IMPLEMENTS_POSIX
272 /* Use the predefined value. */
273#elif U_PLATFORM_USES_ONLY_WIN32_API
274# define U_PLATFORM_IMPLEMENTS_POSIX 0
275#else
276# define U_PLATFORM_IMPLEMENTS_POSIX 1
277#endif
278
279/**
280 * \def U_PLATFORM_IS_LINUX_BASED
281 * Defines whether the platform is Linux or one of its derivatives.
282 * @internal
283 */
284#ifdef U_PLATFORM_IS_LINUX_BASED
285 /* Use the predefined value. */
286#elif U_PF_LINUX <= U_PLATFORM && U_PLATFORM <= 4499
287# define U_PLATFORM_IS_LINUX_BASED 1
288#else
289# define U_PLATFORM_IS_LINUX_BASED 0
290#endif
291
292/**
293 * \def U_PLATFORM_IS_DARWIN_BASED
294 * Defines whether the platform is Darwin or one of its derivatives.
295 * @internal
296 */
297#ifdef U_PLATFORM_IS_DARWIN_BASED
298 /* Use the predefined value. */
299#elif U_PF_DARWIN <= U_PLATFORM && U_PLATFORM <= U_PF_IPHONE
300# define U_PLATFORM_IS_DARWIN_BASED 1
301#else
302# define U_PLATFORM_IS_DARWIN_BASED 0
303#endif
304
305/**
306 * \def U_HAVE_STDINT_H
307 * Defines whether stdint.h is available. It is a C99 standard header.
308 * We used to include inttypes.h which includes stdint.h but we usually do not need
309 * the additional definitions from inttypes.h.
310 * @internal
311 */
312#ifdef U_HAVE_STDINT_H
313 /* Use the predefined value. */
314#elif U_PLATFORM_USES_ONLY_WIN32_API
315# if defined(__BORLANDC__) || U_PLATFORM == U_PF_MINGW || (defined(_MSC_VER) && _MSC_VER>=1600)
316 /* Windows Visual Studio 9 and below do not have stdint.h & inttypes.h, but VS 2010 adds them. */
317# define U_HAVE_STDINT_H 1
318# else
319# define U_HAVE_STDINT_H 0
320# endif
321#elif U_PLATFORM == U_PF_SOLARIS
322 /* Solaris has inttypes.h but not stdint.h. */
323# define U_HAVE_STDINT_H 0
324#elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
325 /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
326# define U_HAVE_STDINT_H 0
327#else
328# define U_HAVE_STDINT_H 1
329#endif
330
331/**
332 * \def U_HAVE_INTTYPES_H
333 * Defines whether inttypes.h is available. It is a C99 standard header.
334 * We include inttypes.h where it is available but stdint.h is not.
335 * @internal
336 */
337#ifdef U_HAVE_INTTYPES_H
338 /* Use the predefined value. */
339#elif U_PLATFORM == U_PF_SOLARIS
340 /* Solaris has inttypes.h but not stdint.h. */
341# define U_HAVE_INTTYPES_H 1
342#elif U_PLATFORM == U_PF_AIX && !defined(_AIX51) && defined(_POWER)
343 /* PPC AIX <= 4.3 has inttypes.h but not stdint.h. */
344# define U_HAVE_INTTYPES_H 1
345#else
346 /* Most platforms have both inttypes.h and stdint.h, or neither. */
347# define U_HAVE_INTTYPES_H U_HAVE_STDINT_H
348#endif
349
350/*===========================================================================*/
351/** @{ Compiler and environment features */
352/*===========================================================================*/
353
354/**
355 * \def U_GCC_MAJOR_MINOR
356 * Indicates whether the compiler is gcc (test for != 0),
357 * and if so, contains its major (times 100) and minor version numbers.
358 * If the compiler is not gcc, then U_GCC_MAJOR_MINOR == 0.
359 *
360 * For example, for testing for whether we have gcc, and whether it's 4.6 or higher,
361 * use "#if U_GCC_MAJOR_MINOR >= 406".
362 * @internal
363 */
364#ifdef __GNUC__
365# define U_GCC_MAJOR_MINOR (__GNUC__ * 100 + __GNUC_MINOR__)
366#else
367# define U_GCC_MAJOR_MINOR 0
368#endif
369
370/**
371 * \def U_IS_BIG_ENDIAN
372 * Determines the endianness of the platform.
373 * @internal
374 */
375#ifdef U_IS_BIG_ENDIAN
376 /* Use the predefined value. */
377#elif defined(BYTE_ORDER) && defined(BIG_ENDIAN)
378# define U_IS_BIG_ENDIAN (BYTE_ORDER == BIG_ENDIAN)
379#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
380 /* gcc */
381# define U_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
382#elif defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
383# define U_IS_BIG_ENDIAN 1
384#elif defined(__LITTLE_ENDIAN__) || defined(_LITTLE_ENDIAN)
385# define U_IS_BIG_ENDIAN 0
386#elif U_PLATFORM == U_PF_OS390 || U_PLATFORM == U_PF_OS400 || defined(__s390__) || defined(__s390x__)
387 /* These platforms do not appear to predefine any endianness macros. */
388# define U_IS_BIG_ENDIAN 1
389#elif defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0)
390 /* HPPA do not appear to predefine any endianness macros. */
391# define U_IS_BIG_ENDIAN 1
392#elif defined(sparc) || defined(__sparc) || defined(__sparc__)
393 /* Some sparc based systems (e.g. Linux) do not predefine any endianness macros. */
394# define U_IS_BIG_ENDIAN 1
395#else
396# define U_IS_BIG_ENDIAN 0
397#endif
398
399/**
400 * \def U_HAVE_PLACEMENT_NEW
401 * Determines whether to override placement new and delete for STL.
402 * @stable ICU 2.6
403 */
404#ifdef U_HAVE_PLACEMENT_NEW
405 /* Use the predefined value. */
406#elif defined(__BORLANDC__)
407# define U_HAVE_PLACEMENT_NEW 0
408#else
409# define U_HAVE_PLACEMENT_NEW 1
410#endif
411
412/**
413 * \def U_HAVE_DEBUG_LOCATION_NEW
414 * Define this to define the MFC debug version of the operator new.
415 *
416 * @stable ICU 3.4
417 */
418#ifdef U_HAVE_DEBUG_LOCATION_NEW
419 /* Use the predefined value. */
420#elif defined(_MSC_VER)
421# define U_HAVE_DEBUG_LOCATION_NEW 1
422#else
423# define U_HAVE_DEBUG_LOCATION_NEW 0
424#endif
425
426/* Compatibility with compilers other than clang: http://clang.llvm.org/docs/LanguageExtensions.html */
427#ifdef __has_attribute
428# define UPRV_HAS_ATTRIBUTE(x) __has_attribute(x)
429#else
430# define UPRV_HAS_ATTRIBUTE(x) 0
431#endif
432#ifdef __has_cpp_attribute
433# define UPRV_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
434#else
435# define UPRV_HAS_CPP_ATTRIBUTE(x) 0
436#endif
437#ifdef __has_declspec_attribute
438# define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) __has_declspec_attribute(x)
439#else
440# define UPRV_HAS_DECLSPEC_ATTRIBUTE(x) 0
441#endif
442#ifdef __has_builtin
443# define UPRV_HAS_BUILTIN(x) __has_builtin(x)
444#else
445# define UPRV_HAS_BUILTIN(x) 0
446#endif
447#ifdef __has_feature
448# define UPRV_HAS_FEATURE(x) __has_feature(x)
449#else
450# define UPRV_HAS_FEATURE(x) 0
451#endif
452#ifdef __has_extension
453# define UPRV_HAS_EXTENSION(x) __has_extension(x)
454#else
455# define UPRV_HAS_EXTENSION(x) 0
456#endif
457#ifdef __has_warning
458# define UPRV_HAS_WARNING(x) __has_warning(x)
459#else
460# define UPRV_HAS_WARNING(x) 0
461#endif
462
463/**
464 * \def U_MALLOC_ATTR
465 * Attribute to mark functions as malloc-like
466 * @internal
467 */
468#if defined(__GNUC__) && __GNUC__>=3
469# define U_MALLOC_ATTR __attribute__ ((__malloc__))
470#else
471# define U_MALLOC_ATTR
472#endif
473
474/**
475 * \def U_ALLOC_SIZE_ATTR
476 * Attribute to specify the size of the allocated buffer for malloc-like functions
477 * @internal
478 */
479#if (defined(__GNUC__) && \
480 (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \
481 UPRV_HAS_ATTRIBUTE(alloc_size)
482# define U_ALLOC_SIZE_ATTR(X) __attribute__ ((alloc_size(X)))
483# define U_ALLOC_SIZE_ATTR2(X,Y) __attribute__ ((alloc_size(X,Y)))
484#else
485# define U_ALLOC_SIZE_ATTR(X)
486# define U_ALLOC_SIZE_ATTR2(X,Y)
487#endif
488
489/**
490 * \def U_CPLUSPLUS_VERSION
491 * 0 if no C++; 1, 11, 14, ... if C++.
492 * Support for specific features cannot always be determined by the C++ version alone.
493 * @internal
494 */
495#ifdef U_CPLUSPLUS_VERSION
496# if U_CPLUSPLUS_VERSION != 0 && !defined(__cplusplus)
497# undef U_CPLUSPLUS_VERSION
498# define U_CPLUSPLUS_VERSION 0
499# endif
500 /* Otherwise use the predefined value. */
501#elif !defined(__cplusplus)
502# define U_CPLUSPLUS_VERSION 0
503#elif __cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L)
504# define U_CPLUSPLUS_VERSION 14
505#elif __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
506# define U_CPLUSPLUS_VERSION 11
507#else
508 // C++98 or C++03
509# define U_CPLUSPLUS_VERSION 1
510#endif
511
512#if (U_PLATFORM == U_PF_AIX || U_PLATFORM == U_PF_OS390) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11)
513// add in std::nullptr_t
514namespace std {
515 typedef decltype(nullptr) nullptr_t;
516};
517#endif
518
519/**
520 * \def U_NOEXCEPT
521 * "noexcept" if supported, otherwise empty.
522 * Some code, especially STL containers, uses move semantics of objects only
523 * if the move constructor and the move operator are declared as not throwing exceptions.
524 * @internal
525 */
526#ifdef U_NOEXCEPT
527 /* Use the predefined value. */
528#else
529# define U_NOEXCEPT noexcept
530#endif
531
532/**
533 * \def U_FALLTHROUGH
534 * Annotate intentional fall-through between switch labels.
535 * http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
536 * @internal
537 */
538#ifndef __cplusplus
539 // Not for C.
540#elif defined(U_FALLTHROUGH)
541 // Use the predefined value.
542#elif defined(__clang__)
543 // Test for compiler vs. feature separately.
544 // Other compilers might choke on the feature test.
545# if UPRV_HAS_CPP_ATTRIBUTE(clang::fallthrough) || \
546 (UPRV_HAS_FEATURE(cxx_attributes) && \
547 UPRV_HAS_WARNING("-Wimplicit-fallthrough"))
548# define U_FALLTHROUGH [[clang::fallthrough]]
549# endif
550#elif defined(__GNUC__) && (__GNUC__ >= 7)
551# define U_FALLTHROUGH __attribute__((fallthrough))
552#endif
553
554#ifndef U_FALLTHROUGH
555# define U_FALLTHROUGH
556#endif
557
558/** @} */
559
560/*===========================================================================*/
561/** @{ Character data types */
562/*===========================================================================*/
563
564/**
565 * U_CHARSET_FAMILY is equal to this value when the platform is an ASCII based platform.
566 * @stable ICU 2.0
567 */
568#define U_ASCII_FAMILY 0
569
570/**
571 * U_CHARSET_FAMILY is equal to this value when the platform is an EBCDIC based platform.
572 * @stable ICU 2.0
573 */
574#define U_EBCDIC_FAMILY 1
575
576/**
577 * \def U_CHARSET_FAMILY
578 *
579 * <p>These definitions allow to specify the encoding of text
580 * in the char data type as defined by the platform and the compiler.
581 * It is enough to determine the code point values of "invariant characters",
582 * which are the ones shared by all encodings that are in use
583 * on a given platform.</p>
584 *
585 * <p>Those "invariant characters" should be all the uppercase and lowercase
586 * latin letters, the digits, the space, and "basic punctuation".
587 * Also, '\\n', '\\r', '\\t' should be available.</p>
588 *
589 * <p>The list of "invariant characters" is:<br>
590 * \code
591 * A-Z a-z 0-9 SPACE " % &amp; ' ( ) * + , - . / : ; < = > ? _
592 * \endcode
593 * <br>
594 * (52 letters + 10 numbers + 20 punc/sym/space = 82 total)</p>
595 *
596 * <p>This matches the IBM Syntactic Character Set (CS 640).</p>
597 *
598 * <p>In other words, all the graphic characters in 7-bit ASCII should
599 * be safely accessible except the following:</p>
600 *
601 * \code
602 * '\' <backslash>
603 * '[' <left bracket>
604 * ']' <right bracket>
605 * '{' <left brace>
606 * '}' <right brace>
607 * '^' <circumflex>
608 * '~' <tilde>
609 * '!' <exclamation mark>
610 * '#' <number sign>
611 * '|' <vertical line>
612 * '$' <dollar sign>
613 * '@' <commercial at>
614 * '`' <grave accent>
615 * \endcode
616 * @stable ICU 2.0
617 */
618#ifdef U_CHARSET_FAMILY
619 /* Use the predefined value. */
620#elif U_PLATFORM == U_PF_OS390 && (!defined(__CHARSET_LIB) || !__CHARSET_LIB)
621# define U_CHARSET_FAMILY U_EBCDIC_FAMILY
622#elif U_PLATFORM == U_PF_OS400 && !defined(__UTF32__)
623# define U_CHARSET_FAMILY U_EBCDIC_FAMILY
624#else
625# define U_CHARSET_FAMILY U_ASCII_FAMILY
626#endif
627
628/**
629 * \def U_CHARSET_IS_UTF8
630 *
631 * Hardcode the default charset to UTF-8.
632 *
633 * If this is set to 1, then
634 * - ICU will assume that all non-invariant char*, StringPiece, std::string etc.
635 * contain UTF-8 text, regardless of what the system API uses
636 * - some ICU code will use fast functions like u_strFromUTF8()
637 * rather than the more general and more heavy-weight conversion API (ucnv.h)
638 * - ucnv_getDefaultName() always returns "UTF-8"
639 * - ucnv_setDefaultName() is disabled and will not change the default charset
640 * - static builds of ICU are smaller
641 * - more functionality is available with the UCONFIG_NO_CONVERSION build-time
642 * configuration option (see unicode/uconfig.h)
643 * - the UCONFIG_NO_CONVERSION build option in uconfig.h is more usable
644 *
645 * @stable ICU 4.2
646 * @see UCONFIG_NO_CONVERSION
647 */
648#ifdef U_CHARSET_IS_UTF8
649 /* Use the predefined value. */
650#elif U_PLATFORM_IS_LINUX_BASED || U_PLATFORM_IS_DARWIN_BASED || \
651 U_PLATFORM == U_PF_EMSCRIPTEN
652# define U_CHARSET_IS_UTF8 1
653#else
654# define U_CHARSET_IS_UTF8 0
655#endif
656
657/** @} */
658
659/*===========================================================================*/
660/** @{ Information about wchar support */
661/*===========================================================================*/
662
663/**
664 * \def U_HAVE_WCHAR_H
665 * Indicates whether <wchar.h> is available (1) or not (0). Set to 1 by default.
666 *
667 * @stable ICU 2.0
668 */
669#ifdef U_HAVE_WCHAR_H
670 /* Use the predefined value. */
671#elif U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9
672 /*
673 * Android before Gingerbread (Android 2.3, API level 9) did not support wchar_t.
674 * The type and header existed, but the library functions did not work as expected.
675 * The size of wchar_t was 1 but L"xyz" string literals had 32-bit units anyway.
676 */
677# define U_HAVE_WCHAR_H 0
678#else
679# define U_HAVE_WCHAR_H 1
680#endif
681
682/**
683 * \def U_SIZEOF_WCHAR_T
684 * U_SIZEOF_WCHAR_T==sizeof(wchar_t)
685 *
686 * @stable ICU 2.0
687 */
688#ifdef U_SIZEOF_WCHAR_T
689 /* Use the predefined value. */
690#elif (U_PLATFORM == U_PF_ANDROID && __ANDROID_API__ < 9)
691 /*
692 * Classic Mac OS and Mac OS X before 10.3 (Panther) did not support wchar_t or wstring.
693 * Newer Mac OS X has size 4.
694 */
695# define U_SIZEOF_WCHAR_T 1
696#elif U_PLATFORM_HAS_WIN32_API || U_PLATFORM == U_PF_CYGWIN
697# define U_SIZEOF_WCHAR_T 2
698#elif U_PLATFORM == U_PF_AIX
699 /*
700 * AIX 6.1 information, section "Wide character data representation":
701 * "... the wchar_t datatype is 32-bit in the 64-bit environment and
702 * 16-bit in the 32-bit environment."
703 * and
704 * "All locales use Unicode for their wide character code values (process code),
705 * except the IBM-eucTW codeset."
706 */
707# ifdef __64BIT__
708# define U_SIZEOF_WCHAR_T 4
709# else
710# define U_SIZEOF_WCHAR_T 2
711# endif
712#elif U_PLATFORM == U_PF_OS390
713 /*
714 * z/OS V1R11 information center, section "LP64 | ILP32":
715 * "In 31-bit mode, the size of long and pointers is 4 bytes and the size of wchar_t is 2 bytes.
716 * Under LP64, the size of long and pointer is 8 bytes and the size of wchar_t is 4 bytes."
717 */
718# ifdef _LP64
719# define U_SIZEOF_WCHAR_T 4
720# else
721# define U_SIZEOF_WCHAR_T 2
722# endif
723#elif U_PLATFORM == U_PF_OS400
724# if defined(__UTF32__)
725 /*
726 * LOCALETYPE(*LOCALEUTF) is specified.
727 * Wide-character strings are in UTF-32,
728 * narrow-character strings are in UTF-8.
729 */
730# define U_SIZEOF_WCHAR_T 4
731# elif defined(__UCS2__)
732 /*
733 * LOCALETYPE(*LOCALEUCS2) is specified.
734 * Wide-character strings are in UCS-2,
735 * narrow-character strings are in EBCDIC.
736 */
737# define U_SIZEOF_WCHAR_T 2
738# else
739 /*
740 * LOCALETYPE(*CLD) or LOCALETYPE(*LOCALE) is specified.
741 * Wide-character strings are in 16-bit EBCDIC,
742 * narrow-character strings are in EBCDIC.
743 */
744# define U_SIZEOF_WCHAR_T 2
745# endif
746#else
747# define U_SIZEOF_WCHAR_T 4
748#endif
749
750#ifndef U_HAVE_WCSCPY
751#define U_HAVE_WCSCPY U_HAVE_WCHAR_H
752#endif
753
754/** @} */
755
756/**
757 * \def U_HAVE_CHAR16_T
758 * Defines whether the char16_t type is available for UTF-16
759 * and u"abc" UTF-16 string literals are supported.
760 * This is a new standard type and standard string literal syntax in C++0x
761 * but has been available in some compilers before.
762 * @internal
763 */
764#ifdef U_HAVE_CHAR16_T
765 /* Use the predefined value. */
766#else
767 /*
768 * Notes:
769 * Visual Studio 2010 (_MSC_VER==1600) defines char16_t as a typedef
770 * and does not support u"abc" string literals.
771 * Visual Studio 2015 (_MSC_VER>=1900) and above adds support for
772 * both char16_t and u"abc" string literals.
773 * gcc 4.4 defines the __CHAR16_TYPE__ macro to a usable type but
774 * does not support u"abc" string literals.
775 * C++11 and C11 require support for UTF-16 literals
776 * TODO: Fix for plain C. Doesn't work on Mac.
777 */
778# if U_CPLUSPLUS_VERSION >= 11 || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L)
779# define U_HAVE_CHAR16_T 1
780# else
781# define U_HAVE_CHAR16_T 0
782# endif
783#endif
784
785/**
786 * @{
787 * \def U_DECLARE_UTF16
788 * Do not use this macro because it is not defined on all platforms.
789 * Use the UNICODE_STRING or U_STRING_DECL macros instead.
790 * @internal
791 */
792#ifdef U_DECLARE_UTF16
793 /* Use the predefined value. */
794#elif U_HAVE_CHAR16_T \
795 || (defined(__xlC__) && defined(__IBM_UTF_LITERAL) && U_SIZEOF_WCHAR_T != 2) \
796 || (defined(__HP_aCC) && __HP_aCC >= 035000) \
797 || (defined(__HP_cc) && __HP_cc >= 111106) \
798 || (defined(U_IN_DOXYGEN))
799# define U_DECLARE_UTF16(string) u ## string
800#elif U_SIZEOF_WCHAR_T == 2 \
801 && (U_CHARSET_FAMILY == 0 || (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400 && defined(__UCS2__)))
802# define U_DECLARE_UTF16(string) L ## string
803#else
804 /* Leave U_DECLARE_UTF16 undefined. See unistr.h. */
805#endif
806
807/** @} */
808
809/*===========================================================================*/
810/** @{ Symbol import-export control */
811/*===========================================================================*/
812
813#ifdef U_EXPORT
814 /* Use the predefined value. */
815#elif defined(U_STATIC_IMPLEMENTATION)
816# define U_EXPORT
817#elif defined(_MSC_VER) || (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \
818 UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
819# define U_EXPORT __declspec(dllexport)
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#else
828# define U_EXPORT
829#endif
830
831/* U_CALLCONV is related to U_EXPORT2 */
832#ifdef U_EXPORT2
833 /* Use the predefined value. */
834#elif defined(_MSC_VER)
835# define U_EXPORT2 __cdecl
836#else
837# define U_EXPORT2
838#endif
839
840#ifdef U_IMPORT
841 /* Use the predefined value. */
842#elif defined(_MSC_VER) || (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \
843 UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
844 /* Windows needs to export/import data. */
845# define U_IMPORT __declspec(dllimport)
846#else
847# define U_IMPORT
848#endif
849
850/**
851 * \def U_CALLCONV
852 * Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary
853 * in callback function typedefs to make sure that the calling convention
854 * is compatible.
855 *
856 * This is only used for non-ICU-API functions.
857 * When a function is a public ICU API,
858 * you must use the U_CAPI and U_EXPORT2 qualifiers.
859 *
860 * Please note, you need to use U_CALLCONV after the *.
861 *
862 * NO : "static const char U_CALLCONV *func( . . . )"
863 * YES: "static const char* U_CALLCONV func( . . . )"
864 *
865 * @stable ICU 2.0
866 */
867#if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
868# define U_CALLCONV __cdecl
869#else
870# define U_CALLCONV U_EXPORT2
871#endif
872
873/**
874 * \def U_CALLCONV_FPTR
875 * Similar to U_CALLCONV, but only used on function pointers.
876 * @internal
877 */
878#if U_PLATFORM == U_PF_OS390 && defined(__cplusplus)
879# define U_CALLCONV_FPTR U_CALLCONV
880#else
881# define U_CALLCONV_FPTR
882#endif
883/** @} */
884
885#endif // _PLATFORM_H
886

source code of include/unicode/platform.h