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