486 lines
16 KiB
C++
486 lines
16 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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******************************************************************************
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*
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* Copyright (C) 1999-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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* file name: umachine.h
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 1999sep13
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* created by: Markus W. Scherer
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*
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* This file defines basic types and constants for ICU to be
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* platform-independent. umachine.h and utf.h are included into
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* utypes.h to provide all the general definitions for ICU.
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* All of these definitions used to be in utypes.h before
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* the UTF-handling macros made this unmaintainable.
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*/
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#ifndef __UMACHINE_H__
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#define __UMACHINE_H__
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/**
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* \file
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* \brief Basic types and constants for UTF
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*
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* <h2> Basic types and constants for UTF </h2>
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* This file defines basic types and constants for utf.h to be
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* platform-independent. umachine.h and utf.h are included into
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* utypes.h to provide all the general definitions for ICU.
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* All of these definitions used to be in utypes.h before
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* the UTF-handling macros made this unmaintainable.
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*
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*/
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/*==========================================================================*/
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/* Include platform-dependent definitions */
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/* which are contained in the platform-specific file platform.h */
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/*==========================================================================*/
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#include "unicode/ptypes.h" /* platform.h is included in ptypes.h */
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/*
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* ANSI C headers:
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* stddef.h defines wchar_t
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*/
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#include <stdbool.h>
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#include <stddef.h>
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/*==========================================================================*/
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/* For C wrappers, we use the symbol U_CAPI. */
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/* This works properly if the includer is C or C++. */
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/* Functions are declared U_CAPI return-type U_EXPORT2 function-name()... */
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/*==========================================================================*/
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/**
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* \def U_CFUNC
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* This is used in a declaration of a library private ICU C function.
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* @stable ICU 2.4
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*/
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/**
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* \def U_CDECL_BEGIN
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* This is used to begin a declaration of a library private ICU C API.
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* @stable ICU 2.4
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*/
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/**
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* \def U_CDECL_END
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* This is used to end a declaration of a library private ICU C API
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* @stable ICU 2.4
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*/
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#ifdef __cplusplus
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# define U_CFUNC extern "C"
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# define U_CDECL_BEGIN extern "C" {
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# define U_CDECL_END }
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#else
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# define U_CFUNC extern
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# define U_CDECL_BEGIN
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# define U_CDECL_END
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#endif
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#ifndef U_ATTRIBUTE_DEPRECATED
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/**
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* \def U_ATTRIBUTE_DEPRECATED
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* This is used for GCC specific attributes
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* @internal
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*/
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#if U_GCC_MAJOR_MINOR >= 302
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# define U_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated))
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/**
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* \def U_ATTRIBUTE_DEPRECATED
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* This is used for Visual C++ specific attributes
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* @internal
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*/
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#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
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# define U_ATTRIBUTE_DEPRECATED __declspec(deprecated)
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#else
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# define U_ATTRIBUTE_DEPRECATED
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#endif
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#endif
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/** This is used to declare a function as a public ICU C API @stable ICU 2.0*/
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#define U_CAPI U_CFUNC U_EXPORT
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/** Obsolete/same as U_CAPI; was used to declare a function as a stable public ICU C API*/
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#define U_STABLE U_CAPI
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/** Obsolete/same as U_CAPI; was used to declare a function as a draft public ICU C API */
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#define U_DRAFT U_CAPI
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/** This is used to declare a function as a deprecated public ICU C API */
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#define U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED
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/** Obsolete/same as U_CAPI; was used to declare a function as an obsolete public ICU C API */
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#define U_OBSOLETE U_CAPI
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/** Obsolete/same as U_CAPI; was used to declare a function as an internal ICU C API */
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#define U_INTERNAL U_CAPI
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/**
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* \def U_OVERRIDE
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* Defined to the C++11 "override" keyword if available.
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* Denotes a class or member which is an override of the base class.
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* May result in an error if it applied to something not an override.
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* @internal
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*/
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#ifndef U_OVERRIDE
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#define U_OVERRIDE override
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#endif
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/**
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* \def U_FINAL
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* Defined to the C++11 "final" keyword if available.
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* Denotes a class or member which may not be overridden in subclasses.
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* May result in an error if subclasses attempt to override.
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* @internal
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*/
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#if !defined(U_FINAL) || defined(U_IN_DOXYGEN)
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#define U_FINAL final
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#endif
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// Before ICU 65, function-like, multi-statement ICU macros were just defined as
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// series of statements wrapped in { } blocks and the caller could choose to
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// either treat them as if they were actual functions and end the invocation
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// with a trailing ; creating an empty statement after the block or else omit
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// this trailing ; using the knowledge that the macro would expand to { }.
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//
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// But doing so doesn't work well with macros that look like functions and
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// compiler warnings about empty statements (ICU-20601) and ICU 65 therefore
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// switches to the standard solution of wrapping such macros in do { } while.
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//
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// This will however break existing code that depends on being able to invoke
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// these macros without a trailing ; so to be able to remain compatible with
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// such code the wrapper is itself defined as macros so that it's possible to
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// build ICU 65 and later with the old macro behaviour, like this:
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//
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// export CPPFLAGS='-DUPRV_BLOCK_MACRO_BEGIN="" -DUPRV_BLOCK_MACRO_END=""'
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// runConfigureICU ...
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//
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/**
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* \def UPRV_BLOCK_MACRO_BEGIN
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* Defined as the "do" keyword by default.
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* @internal
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*/
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#ifndef UPRV_BLOCK_MACRO_BEGIN
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#define UPRV_BLOCK_MACRO_BEGIN do
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#endif
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/**
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* \def UPRV_BLOCK_MACRO_END
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* Defined as "while (false)" by default.
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* @internal
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*/
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#ifndef UPRV_BLOCK_MACRO_END
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#define UPRV_BLOCK_MACRO_END while (false)
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#endif
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/*==========================================================================*/
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/* limits for int32_t etc., like in POSIX inttypes.h */
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/*==========================================================================*/
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#ifndef INT8_MIN
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/** The smallest value an 8 bit signed integer can hold @stable ICU 2.0 */
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# define INT8_MIN ((int8_t)(-128))
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#endif
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#ifndef INT16_MIN
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/** The smallest value a 16 bit signed integer can hold @stable ICU 2.0 */
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# define INT16_MIN ((int16_t)(-32767-1))
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#endif
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#ifndef INT32_MIN
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/** The smallest value a 32 bit signed integer can hold @stable ICU 2.0 */
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# define INT32_MIN ((int32_t)(-2147483647-1))
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#endif
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#ifndef INT8_MAX
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/** The largest value an 8 bit signed integer can hold @stable ICU 2.0 */
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# define INT8_MAX ((int8_t)(127))
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#endif
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#ifndef INT16_MAX
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/** The largest value a 16 bit signed integer can hold @stable ICU 2.0 */
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# define INT16_MAX ((int16_t)(32767))
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#endif
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#ifndef INT32_MAX
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/** The largest value a 32 bit signed integer can hold @stable ICU 2.0 */
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# define INT32_MAX ((int32_t)(2147483647))
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#endif
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#ifndef UINT8_MAX
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/** The largest value an 8 bit unsigned integer can hold @stable ICU 2.0 */
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# define UINT8_MAX ((uint8_t)(255U))
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#endif
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#ifndef UINT16_MAX
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/** The largest value a 16 bit unsigned integer can hold @stable ICU 2.0 */
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# define UINT16_MAX ((uint16_t)(65535U))
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#endif
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#ifndef UINT32_MAX
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/** The largest value a 32 bit unsigned integer can hold @stable ICU 2.0 */
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# define UINT32_MAX ((uint32_t)(4294967295U))
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#endif
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#if defined(U_INT64_T_UNAVAILABLE)
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# error int64_t is required for decimal format and rule-based number format.
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#else
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# ifndef INT64_C
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/**
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* Provides a platform independent way to specify a signed 64-bit integer constant.
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* note: may be wrong for some 64 bit platforms - ensure your compiler provides INT64_C
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* @stable ICU 2.8
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*/
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# define INT64_C(c) c ## LL
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# endif
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# ifndef UINT64_C
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/**
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* Provides a platform independent way to specify an unsigned 64-bit integer constant.
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* note: may be wrong for some 64 bit platforms - ensure your compiler provides UINT64_C
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* @stable ICU 2.8
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*/
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# define UINT64_C(c) c ## ULL
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# endif
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# ifndef U_INT64_MIN
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/** The smallest value a 64 bit signed integer can hold @stable ICU 2.8 */
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# define U_INT64_MIN ((int64_t)(INT64_C(-9223372036854775807)-1))
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# endif
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# ifndef U_INT64_MAX
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/** The largest value a 64 bit signed integer can hold @stable ICU 2.8 */
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# define U_INT64_MAX ((int64_t)(INT64_C(9223372036854775807)))
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# endif
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# ifndef U_UINT64_MAX
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/** The largest value a 64 bit unsigned integer can hold @stable ICU 2.8 */
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# define U_UINT64_MAX ((uint64_t)(UINT64_C(18446744073709551615)))
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# endif
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#endif
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/*==========================================================================*/
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/* Boolean data type */
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/*==========================================================================*/
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/**
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* The ICU boolean type, a signed-byte integer.
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* ICU-specific for historical reasons: The C and C++ standards used to not define type bool.
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* Also provides a fixed type definition, as opposed to
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* type bool whose details (e.g., sizeof) may vary by compiler and between C and C++.
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*
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* @stable ICU 2.0
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*/
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typedef int8_t UBool;
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/**
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* \def U_DEFINE_FALSE_AND_TRUE
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* Normally turns off defining macros FALSE=0 & TRUE=1 in public ICU headers.
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* These obsolete macros sometimes break compilation of other code that
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* defines enum constants or similar with these names.
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* C++ has long defined bool/false/true.
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* C99 also added definitions for these, although as macros; see stdbool.h.
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*
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* You may transitionally define U_DEFINE_FALSE_AND_TRUE=1 if you need time to migrate code.
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*
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* @internal ICU 68
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*/
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#ifdef U_DEFINE_FALSE_AND_TRUE
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// Use the predefined value.
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#else
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// Default to avoiding collision with non-macro definitions of FALSE & TRUE.
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# define U_DEFINE_FALSE_AND_TRUE 0
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#endif
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#if U_DEFINE_FALSE_AND_TRUE || defined(U_IN_DOXYGEN)
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#ifndef TRUE
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/**
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* The TRUE value of a UBool.
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*
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* @deprecated ICU 68 Use standard "true" instead.
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*/
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# define TRUE 1
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#endif
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#ifndef FALSE
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/**
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* The FALSE value of a UBool.
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*
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* @deprecated ICU 68 Use standard "false" instead.
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*/
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# define FALSE 0
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#endif
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#endif // U_DEFINE_FALSE_AND_TRUE
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/*==========================================================================*/
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/* Unicode data types */
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/*==========================================================================*/
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/* wchar_t-related definitions -------------------------------------------- */
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/*
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* \def U_WCHAR_IS_UTF16
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* Defined if wchar_t uses UTF-16.
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*
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* @stable ICU 2.0
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*/
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/*
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* \def U_WCHAR_IS_UTF32
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* Defined if wchar_t uses UTF-32.
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*
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* @stable ICU 2.0
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*/
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#if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
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# ifdef __STDC_ISO_10646__
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# if (U_SIZEOF_WCHAR_T==2)
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# define U_WCHAR_IS_UTF16
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# elif (U_SIZEOF_WCHAR_T==4)
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# define U_WCHAR_IS_UTF32
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# endif
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# elif defined __UCS2__
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# if (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400) && (U_SIZEOF_WCHAR_T==2)
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# define U_WCHAR_IS_UTF16
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# endif
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# elif defined(__UCS4__) || (U_PLATFORM == U_PF_OS400 && defined(__UTF32__))
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# if (U_SIZEOF_WCHAR_T==4)
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# define U_WCHAR_IS_UTF32
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# endif
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# elif U_PLATFORM_IS_DARWIN_BASED || (U_SIZEOF_WCHAR_T==4 && U_PLATFORM_IS_LINUX_BASED)
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# define U_WCHAR_IS_UTF32
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# elif U_PLATFORM_HAS_WIN32_API
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# define U_WCHAR_IS_UTF16
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# endif
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#endif
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/* UChar and UChar32 definitions -------------------------------------------- */
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/** Number of bytes in a UChar. @stable ICU 2.0 */
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#define U_SIZEOF_UCHAR 2
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/**
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* \def U_CHAR16_IS_TYPEDEF
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* If 1, then char16_t is a typedef and not a real type (yet)
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* @internal
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*/
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#if (U_PLATFORM == U_PF_AIX) && defined(__cplusplus) &&(U_CPLUSPLUS_VERSION < 11)
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// for AIX, uchar.h needs to be included
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# include <uchar.h>
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# define U_CHAR16_IS_TYPEDEF 1
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#elif defined(_MSC_VER) && (_MSC_VER < 1900)
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// Versions of Visual Studio/MSVC below 2015 do not support char16_t as a real type,
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// and instead use a typedef. https://msdn.microsoft.com/library/bb531344.aspx
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# define U_CHAR16_IS_TYPEDEF 1
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#else
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# define U_CHAR16_IS_TYPEDEF 0
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#endif
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/**
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* \var UChar
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*
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* The base type for UTF-16 code units and pointers.
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* Unsigned 16-bit integer.
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* Starting with ICU 59, C++ API uses char16_t directly, while C API continues to use UChar.
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*
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* UChar is configurable by defining the macro UCHAR_TYPE
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* on the preprocessor or compiler command line:
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* -DUCHAR_TYPE=uint16_t or -DUCHAR_TYPE=wchar_t (if U_SIZEOF_WCHAR_T==2) etc.
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* (The UCHAR_TYPE can also be \#defined earlier in this file, for outside the ICU library code.)
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* This is for transitional use from application code that uses uint16_t or wchar_t for UTF-16.
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*
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* The default is UChar=char16_t.
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*
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* C++11 defines char16_t as bit-compatible with uint16_t, but as a distinct type.
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*
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* In C, char16_t is a simple typedef of uint_least16_t.
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* ICU requires uint_least16_t=uint16_t for data memory mapping.
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* On macOS, char16_t is not available because the uchar.h standard header is missing.
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*
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* @stable ICU 4.4
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*/
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#if 1
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// #if 1 is normal. UChar defaults to char16_t in C++.
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// For configuration testing of UChar=uint16_t temporarily change this to #if 0.
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// The intltest Makefile #defines UCHAR_TYPE=char16_t,
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// so we only #define it to uint16_t if it is undefined so far.
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#elif !defined(UCHAR_TYPE)
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# define UCHAR_TYPE uint16_t
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#endif
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#if defined(U_COMBINED_IMPLEMENTATION) || defined(U_COMMON_IMPLEMENTATION) || \
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defined(U_I18N_IMPLEMENTATION) || defined(U_IO_IMPLEMENTATION)
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// Inside the ICU library code, never configurable.
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typedef char16_t UChar;
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#elif defined(UCHAR_TYPE)
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typedef UCHAR_TYPE UChar;
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#elif (U_CPLUSPLUS_VERSION >= 11)
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typedef char16_t UChar;
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#else
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typedef uint16_t UChar;
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#endif
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/**
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* \var OldUChar
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* Default ICU 58 definition of UChar.
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* A base type for UTF-16 code units and pointers.
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* Unsigned 16-bit integer.
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*
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* Define OldUChar to be wchar_t if that is 16 bits wide.
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* If wchar_t is not 16 bits wide, then define UChar to be uint16_t.
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*
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* This makes the definition of OldUChar platform-dependent
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* but allows direct string type compatibility with platforms with
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* 16-bit wchar_t types.
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*
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* This is how UChar was defined in ICU 58, for transition convenience.
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* Exception: ICU 58 UChar was defined to UCHAR_TYPE if that macro was defined.
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* The current UChar responds to UCHAR_TYPE but OldUChar does not.
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*
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* @stable ICU 59
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*/
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#if U_SIZEOF_WCHAR_T==2
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typedef wchar_t OldUChar;
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#elif defined(__CHAR16_TYPE__)
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typedef __CHAR16_TYPE__ OldUChar;
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#else
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typedef uint16_t OldUChar;
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#endif
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/**
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* Define UChar32 as a type for single Unicode code points.
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* UChar32 is a signed 32-bit integer (same as int32_t).
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*
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* The Unicode code point range is 0..0x10ffff.
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* All other values (negative or >=0x110000) are illegal as Unicode code points.
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* They may be used as sentinel values to indicate "done", "error"
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* or similar non-code point conditions.
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*
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* Before ICU 2.4 (Jitterbug 2146), UChar32 was defined
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* to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned)
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* or else to be uint32_t.
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* That is, the definition of UChar32 was platform-dependent.
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*
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* @see U_SENTINEL
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* @stable ICU 2.4
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*/
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typedef int32_t UChar32;
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/**
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* This value is intended for sentinel values for APIs that
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* (take or) return single code points (UChar32).
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* It is outside of the Unicode code point range 0..0x10ffff.
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*
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* For example, a "done" or "error" value in a new API
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* could be indicated with U_SENTINEL.
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*
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* ICU APIs designed before ICU 2.4 usually define service-specific "done"
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* values, mostly 0xffff.
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* Those may need to be distinguished from
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* actual U+ffff text contents by calling functions like
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* CharacterIterator::hasNext() or UnicodeString::length().
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*
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* @return -1
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* @see UChar32
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* @stable ICU 2.4
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*/
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#define U_SENTINEL (-1)
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#include "unicode/urename.h"
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#endif
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