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) 1999-2015, International Business Machines
7* Corporation and others. All Rights Reserved.
8*
9******************************************************************************
10* file name: umachine.h
11* encoding: UTF-8
12* tab size: 8 (not used)
13* indentation:4
14*
15* created on: 1999sep13
16* created by: Markus W. Scherer
17*
18* This file defines basic types and constants for ICU to be
19* platform-independent. umachine.h and utf.h are included into
20* utypes.h to provide all the general definitions for ICU.
21* All of these definitions used to be in utypes.h before
22* the UTF-handling macros made this unmaintainable.
23*/
24
25#ifndef __UMACHINE_H__
26#define __UMACHINE_H__
27
28
29/**
30 * \file
31 * \brief Basic types and constants for UTF
32 *
33 * <h2> Basic types and constants for UTF </h2>
34 * This file defines basic types and constants for utf.h to be
35 * platform-independent. umachine.h and utf.h are included into
36 * utypes.h to provide all the general definitions for ICU.
37 * All of these definitions used to be in utypes.h before
38 * the UTF-handling macros made this unmaintainable.
39 *
40 */
41/*==========================================================================*/
42/* Include platform-dependent definitions */
43/* which are contained in the platform-specific file platform.h */
44/*==========================================================================*/
45
46#include "unicode/ptypes.h" /* platform.h is included in ptypes.h */
47
48/*
49 * ANSI C headers:
50 * stddef.h defines wchar_t
51 */
52#include <stddef.h>
53
54/*==========================================================================*/
55/* For C wrappers, we use the symbol U_STABLE. */
56/* This works properly if the includer is C or C++. */
57/* Functions are declared U_STABLE return-type U_EXPORT2 function-name()... */
58/*==========================================================================*/
59
60/**
61 * \def U_CFUNC
62 * This is used in a declaration of a library private ICU C function.
63 * @stable ICU 2.4
64 */
65
66/**
67 * \def U_CDECL_BEGIN
68 * This is used to begin a declaration of a library private ICU C API.
69 * @stable ICU 2.4
70 */
71
72/**
73 * \def U_CDECL_END
74 * This is used to end a declaration of a library private ICU C API
75 * @stable ICU 2.4
76 */
77
78#ifdef __cplusplus
79# define U_CFUNC extern "C"
80# define U_CDECL_BEGIN extern "C" {
81# define U_CDECL_END }
82#else
83# define U_CFUNC extern
84# define U_CDECL_BEGIN
85# define U_CDECL_END
86#endif
87
88#ifndef U_ATTRIBUTE_DEPRECATED
89/**
90 * \def U_ATTRIBUTE_DEPRECATED
91 * This is used for GCC specific attributes
92 * @internal
93 */
94#if U_GCC_MAJOR_MINOR >= 302
95# define U_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated))
96/**
97 * \def U_ATTRIBUTE_DEPRECATED
98 * This is used for Visual C++ specific attributes
99 * @internal
100 */
101#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
102# define U_ATTRIBUTE_DEPRECATED __declspec(deprecated)
103#else
104# define U_ATTRIBUTE_DEPRECATED
105#endif
106#endif
107
108/** This is used to declare a function as a public ICU C API @stable ICU 2.0*/
109#define U_CAPI U_CFUNC U_EXPORT
110/** This is used to declare a function as a stable public ICU C API*/
111#define U_STABLE U_CAPI
112/** This is used to declare a function as a draft public ICU C API */
113#define U_DRAFT U_CAPI
114/** This is used to declare a function as a deprecated public ICU C API */
115#define U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED
116/** This is used to declare a function as an obsolete public ICU C API */
117#define U_OBSOLETE U_CAPI
118/** This is used to declare a function as an internal ICU C API */
119#define U_INTERNAL U_CAPI
120
121/**
122 * \def U_OVERRIDE
123 * Defined to the C++11 "override" keyword if available.
124 * Denotes a class or member which is an override of the base class.
125 * May result in an error if it applied to something not an override.
126 * @internal
127 */
128
129/**
130 * \def U_FINAL
131 * Defined to the C++11 "final" keyword if available.
132 * Denotes a class or member which may not be overridden in subclasses.
133 * May result in an error if subclasses attempt to override.
134 * @internal
135 */
136
137#if U_CPLUSPLUS_VERSION >= 11
138/* C++11 */
139#ifndef U_OVERRIDE
140#define U_OVERRIDE override
141#endif
142#ifndef U_FINAL
143#define U_FINAL final
144#endif
145#else
146/* not C++11 - define to nothing */
147#ifndef U_OVERRIDE
148#define U_OVERRIDE
149#endif
150#ifndef U_FINAL
151#define U_FINAL
152#endif
153#endif
154
155/*==========================================================================*/
156/* limits for int32_t etc., like in POSIX inttypes.h */
157/*==========================================================================*/
158
159#ifndef INT8_MIN
160/** The smallest value an 8 bit signed integer can hold @stable ICU 2.0 */
161# define INT8_MIN ((int8_t)(-128))
162#endif
163#ifndef INT16_MIN
164/** The smallest value a 16 bit signed integer can hold @stable ICU 2.0 */
165# define INT16_MIN ((int16_t)(-32767-1))
166#endif
167#ifndef INT32_MIN
168/** The smallest value a 32 bit signed integer can hold @stable ICU 2.0 */
169# define INT32_MIN ((int32_t)(-2147483647-1))
170#endif
171
172#ifndef INT8_MAX
173/** The largest value an 8 bit signed integer can hold @stable ICU 2.0 */
174# define INT8_MAX ((int8_t)(127))
175#endif
176#ifndef INT16_MAX
177/** The largest value a 16 bit signed integer can hold @stable ICU 2.0 */
178# define INT16_MAX ((int16_t)(32767))
179#endif
180#ifndef INT32_MAX
181/** The largest value a 32 bit signed integer can hold @stable ICU 2.0 */
182# define INT32_MAX ((int32_t)(2147483647))
183#endif
184
185#ifndef UINT8_MAX
186/** The largest value an 8 bit unsigned integer can hold @stable ICU 2.0 */
187# define UINT8_MAX ((uint8_t)(255U))
188#endif
189#ifndef UINT16_MAX
190/** The largest value a 16 bit unsigned integer can hold @stable ICU 2.0 */
191# define UINT16_MAX ((uint16_t)(65535U))
192#endif
193#ifndef UINT32_MAX
194/** The largest value a 32 bit unsigned integer can hold @stable ICU 2.0 */
195# define UINT32_MAX ((uint32_t)(4294967295U))
196#endif
197
198#if defined(U_INT64_T_UNAVAILABLE)
199# error int64_t is required for decimal format and rule-based number format.
200#else
201# ifndef INT64_C
202/**
203 * Provides a platform independent way to specify a signed 64-bit integer constant.
204 * note: may be wrong for some 64 bit platforms - ensure your compiler provides INT64_C
205 * @stable ICU 2.8
206 */
207# define INT64_C(c) c ## LL
208# endif
209# ifndef UINT64_C
210/**
211 * Provides a platform independent way to specify an unsigned 64-bit integer constant.
212 * note: may be wrong for some 64 bit platforms - ensure your compiler provides UINT64_C
213 * @stable ICU 2.8
214 */
215# define UINT64_C(c) c ## ULL
216# endif
217# ifndef U_INT64_MIN
218/** The smallest value a 64 bit signed integer can hold @stable ICU 2.8 */
219# define U_INT64_MIN ((int64_t)(INT64_C(-9223372036854775807)-1))
220# endif
221# ifndef U_INT64_MAX
222/** The largest value a 64 bit signed integer can hold @stable ICU 2.8 */
223# define U_INT64_MAX ((int64_t)(INT64_C(9223372036854775807)))
224# endif
225# ifndef U_UINT64_MAX
226/** The largest value a 64 bit unsigned integer can hold @stable ICU 2.8 */
227# define U_UINT64_MAX ((uint64_t)(UINT64_C(18446744073709551615)))
228# endif
229#endif
230
231/*==========================================================================*/
232/* Boolean data type */
233/*==========================================================================*/
234
235/** The ICU boolean type @stable ICU 2.0 */
236typedef int8_t UBool;
237
238#ifndef TRUE
239/** The TRUE value of a UBool @stable ICU 2.0 */
240# define TRUE 1
241#endif
242#ifndef FALSE
243/** The FALSE value of a UBool @stable ICU 2.0 */
244# define FALSE 0
245#endif
246
247
248/*==========================================================================*/
249/* Unicode data types */
250/*==========================================================================*/
251
252/* wchar_t-related definitions -------------------------------------------- */
253
254/*
255 * \def U_WCHAR_IS_UTF16
256 * Defined if wchar_t uses UTF-16.
257 *
258 * @stable ICU 2.0
259 */
260/*
261 * \def U_WCHAR_IS_UTF32
262 * Defined if wchar_t uses UTF-32.
263 *
264 * @stable ICU 2.0
265 */
266#if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
267# ifdef __STDC_ISO_10646__
268# if (U_SIZEOF_WCHAR_T==2)
269# define U_WCHAR_IS_UTF16
270# elif (U_SIZEOF_WCHAR_T==4)
271# define U_WCHAR_IS_UTF32
272# endif
273# elif defined __UCS2__
274# if (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400) && (U_SIZEOF_WCHAR_T==2)
275# define U_WCHAR_IS_UTF16
276# endif
277# elif defined(__UCS4__) || (U_PLATFORM == U_PF_OS400 && defined(__UTF32__))
278# if (U_SIZEOF_WCHAR_T==4)
279# define U_WCHAR_IS_UTF32
280# endif
281# elif U_PLATFORM_IS_DARWIN_BASED || (U_SIZEOF_WCHAR_T==4 && U_PLATFORM_IS_LINUX_BASED)
282# define U_WCHAR_IS_UTF32
283# elif U_PLATFORM_HAS_WIN32_API
284# define U_WCHAR_IS_UTF16
285# endif
286#endif
287
288/* UChar and UChar32 definitions -------------------------------------------- */
289
290/** Number of bytes in a UChar. @stable ICU 2.0 */
291#define U_SIZEOF_UCHAR 2
292
293/**
294 * \def U_CHAR16_IS_TYPEDEF
295 * If 1, then char16_t is a typedef and not a real type (yet)
296 * @internal
297 */
298#if (U_PLATFORM == U_PF_AIX) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11)
299// for AIX, uchar.h needs to be included
300# include <uchar.h>
301# define U_CHAR16_IS_TYPEDEF 1
302#elif defined(_MSC_VER) && (_MSC_VER < 1900)
303// Versions of Visual Studio/MSVC below 2015 do not support char16_t as a real type,
304// and instead use a typedef. https://msdn.microsoft.com/library/bb531344.aspx
305# define U_CHAR16_IS_TYPEDEF 1
306#else
307# define U_CHAR16_IS_TYPEDEF 0
308#endif
309
310
311/**
312 * \var UChar
313 *
314 * The base type for UTF-16 code units and pointers.
315 * Unsigned 16-bit integer.
316 * Starting with ICU 59, C++ API uses char16_t directly, while C API continues to use UChar.
317 *
318 * UChar is configurable by defining the macro UCHAR_TYPE
319 * on the preprocessor or compiler command line:
320 * -DUCHAR_TYPE=uint16_t or -DUCHAR_TYPE=wchar_t (if U_SIZEOF_WCHAR_T==2) etc.
321 * (The UCHAR_TYPE can also be #defined earlier in this file, for outside the ICU library code.)
322 * This is for transitional use from application code that uses uint16_t or wchar_t for UTF-16.
323 *
324 * The default is UChar=char16_t.
325 *
326 * C++11 defines char16_t as bit-compatible with uint16_t, but as a distinct type.
327 *
328 * In C, char16_t is a simple typedef of uint_least16_t.
329 * ICU requires uint_least16_t=uint16_t for data memory mapping.
330 * On macOS, char16_t is not available because the uchar.h standard header is missing.
331 *
332 * @stable ICU 4.4
333 */
334
335#if 1
336 // #if 1 is normal. UChar defaults to char16_t in C++.
337 // For configuration testing of UChar=uint16_t temporarily change this to #if 0.
338 // The intltest Makefile #defines UCHAR_TYPE=char16_t,
339 // so we only #define it to uint16_t if it is undefined so far.
340#elif !defined(UCHAR_TYPE)
341# define UCHAR_TYPE uint16_t
342#endif
343
344#if defined(U_COMBINED_IMPLEMENTATION) || defined(U_COMMON_IMPLEMENTATION) || \
345 defined(U_I18N_IMPLEMENTATION) || defined(U_IO_IMPLEMENTATION)
346 // Inside the ICU library code, never configurable.
347 typedef char16_t UChar;
348#elif defined(UCHAR_TYPE)
349 typedef UCHAR_TYPE UChar;
350#elif defined(__cplusplus)
351 typedef char16_t UChar;
352#else
353 typedef uint16_t UChar;
354#endif
355
356/**
357 * \var OldUChar
358 * Default ICU 58 definition of UChar.
359 * A base type for UTF-16 code units and pointers.
360 * Unsigned 16-bit integer.
361 *
362 * Define OldUChar to be wchar_t if that is 16 bits wide.
363 * If wchar_t is not 16 bits wide, then define UChar to be uint16_t.
364 *
365 * This makes the definition of OldUChar platform-dependent
366 * but allows direct string type compatibility with platforms with
367 * 16-bit wchar_t types.
368 *
369 * This is how UChar was defined in ICU 58, for transition convenience.
370 * Exception: ICU 58 UChar was defined to UCHAR_TYPE if that macro was defined.
371 * The current UChar responds to UCHAR_TYPE but OldUChar does not.
372 *
373 * @stable ICU 59
374 */
375#if U_SIZEOF_WCHAR_T==2
376 typedef wchar_t OldUChar;
377#elif defined(__CHAR16_TYPE__)
378 typedef __CHAR16_TYPE__ OldUChar;
379#else
380 typedef uint16_t OldUChar;
381#endif
382
383/**
384 * Define UChar32 as a type for single Unicode code points.
385 * UChar32 is a signed 32-bit integer (same as int32_t).
386 *
387 * The Unicode code point range is 0..0x10ffff.
388 * All other values (negative or >=0x110000) are illegal as Unicode code points.
389 * They may be used as sentinel values to indicate "done", "error"
390 * or similar non-code point conditions.
391 *
392 * Before ICU 2.4 (Jitterbug 2146), UChar32 was defined
393 * to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned)
394 * or else to be uint32_t.
395 * That is, the definition of UChar32 was platform-dependent.
396 *
397 * @see U_SENTINEL
398 * @stable ICU 2.4
399 */
400typedef int32_t UChar32;
401
402/**
403 * This value is intended for sentinel values for APIs that
404 * (take or) return single code points (UChar32).
405 * It is outside of the Unicode code point range 0..0x10ffff.
406 *
407 * For example, a "done" or "error" value in a new API
408 * could be indicated with U_SENTINEL.
409 *
410 * ICU APIs designed before ICU 2.4 usually define service-specific "done"
411 * values, mostly 0xffff.
412 * Those may need to be distinguished from
413 * actual U+ffff text contents by calling functions like
414 * CharacterIterator::hasNext() or UnicodeString::length().
415 *
416 * @return -1
417 * @see UChar32
418 * @stable ICU 2.4
419 */
420#define U_SENTINEL (-1)
421
422#include "unicode/urename.h"
423
424#endif
425