src/third_party/icu/source/common/unicode/umachine.h - cobalt - Git at Google

 /*
 ******************************************************************************
 *
 *   Copyright (C) 1999-2015, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 *   file name:  umachine.h
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 1999sep13
 *   created by: Markus W. Scherer
 *
 *   This file defines basic types and constants for ICU to be
 *   platform-independent. umachine.h and utf.h are included into
 *   utypes.h to provide all the general definitions for ICU.
 *   All of these definitions used to be in utypes.h before
 *   the UTF-handling macros made this unmaintainable.
 */

 #ifndef __UMACHINE_H__
 #define __UMACHINE_H__


 /**
  * \file
  * \brief Basic types and constants for UTF
  *
  * <h2> Basic types and constants for UTF </h2>
  *   This file defines basic types and constants for utf.h to be
  *   platform-independent. umachine.h and utf.h are included into
  *   utypes.h to provide all the general definitions for ICU.
  *   All of these definitions used to be in utypes.h before
  *   the UTF-handling macros made this unmaintainable.
  *
  */
 /*==========================================================================*/
 /* Include platform-dependent definitions                                   */
 /* which are contained in the platform-specific file platform.h             */
 /*==========================================================================*/

 #include "unicode/ptypes.h" /* platform.h is included in ptypes.h */

 /*
  * ANSI C headers:
  * stddef.h defines wchar_t
  */
 #if !defined(STARBOARD)
 #include <stddef.h>
 #endif

 /*==========================================================================*/
 /* For C wrappers, we use the symbol U_STABLE.                                */
 /* This works properly if the includer is C or C++.                         */
 /* Functions are declared   U_STABLE return-type U_EXPORT2 function-name()... */
 /*==========================================================================*/

 /**
  * \def U_CFUNC
  * This is used in a declaration of a library private ICU C function.
  * @stable ICU 2.4
  */

 /**
  * \def U_CDECL_BEGIN
  * This is used to begin a declaration of a library private ICU C API.
  * @stable ICU 2.4
  */

 /**
  * \def U_CDECL_END
  * This is used to end a declaration of a library private ICU C API
  * @stable ICU 2.4
  */

 #ifdef __cplusplus
 #   define U_CFUNC extern "C"
 #   define U_CDECL_BEGIN extern "C" {
 #   define U_CDECL_END   }
 #else
 #   define U_CFUNC extern
 #   define U_CDECL_BEGIN
 #   define U_CDECL_END
 #endif

 #ifndef U_ATTRIBUTE_DEPRECATED
 /**
  * \def U_ATTRIBUTE_DEPRECATED
  *  This is used for GCC specific attributes
  * @internal
  */
 #if U_GCC_MAJOR_MINOR >= 302
 #    define U_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated))
 /**
  * \def U_ATTRIBUTE_DEPRECATED
  * This is used for Visual C++ specific attributes
  * @internal
  */
 #elif defined(_MSC_VER) && (_MSC_VER >= 1400)
 #    define U_ATTRIBUTE_DEPRECATED __declspec(deprecated)
 #else
 #    define U_ATTRIBUTE_DEPRECATED
 #endif
 #endif

 /** This is used to declare a function as a public ICU C API @stable ICU 2.0*/
 #define U_CAPI U_CFUNC U_EXPORT
 /** This is used to declare a function as a stable public ICU C API*/
 #define U_STABLE U_CAPI
 /** This is used to declare a function as a draft public ICU C API  */
 #define U_DRAFT  U_CAPI
 /** This is used to declare a function as a deprecated public ICU C API  */
 #define U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED
 /** This is used to declare a function as an obsolete public ICU C API  */
 #define U_OBSOLETE U_CAPI
 /** This is used to declare a function as an internal ICU C API  */
 #define U_INTERNAL U_CAPI

 /**
  * \def U_OVERRIDE
  * Defined to the C++11 "override" keyword if available.
  * Denotes a class or member which is an override of the base class.
  * May result in an error if it applied to something not an override.
  * @internal
  */

 /**
  * \def U_FINAL
  * Defined to the C++11 "final" keyword if available.
  * Denotes a class or member which may not be overridden in subclasses.
  * May result in an error if subclasses attempt to override.
  * @internal
  */

 #if U_CPLUSPLUS_VERSION >= 11
 /* C++11 */
 #ifndef U_OVERRIDE
 #define U_OVERRIDE override
 #endif
 #ifndef U_FINAL
 #define U_FINAL final
 #endif
 #else
 /* not C++11 - define to nothing */
 #ifndef U_OVERRIDE
 #define U_OVERRIDE
 #endif
 #ifndef U_FINAL
 #define U_FINAL
 #endif
 #endif

 /*==========================================================================*/
 /* limits for int32_t etc., like in POSIX inttypes.h                        */
 /*==========================================================================*/

 #ifndef INT8_MIN
 /** The smallest value an 8 bit signed integer can hold @stable ICU 2.0 */
 #   define INT8_MIN        ((int8_t)(-128))
 #endif
 #ifndef INT16_MIN
 /** The smallest value a 16 bit signed integer can hold @stable ICU 2.0 */
 #   define INT16_MIN       ((int16_t)(-32767-1))
 #endif
 #ifndef INT32_MIN
 /** The smallest value a 32 bit signed integer can hold @stable ICU 2.0 */
 #   define INT32_MIN       ((int32_t)(-2147483647-1))
 #endif

 #ifndef INT8_MAX
 /** The largest value an 8 bit signed integer can hold @stable ICU 2.0 */
 #   define INT8_MAX        ((int8_t)(127))
 #endif
 #ifndef INT16_MAX
 /** The largest value a 16 bit signed integer can hold @stable ICU 2.0 */
 #   define INT16_MAX       ((int16_t)(32767))
 #endif
 #ifndef INT32_MAX
 /** The largest value a 32 bit signed integer can hold @stable ICU 2.0 */
 #   define INT32_MAX       ((int32_t)(2147483647))
 #endif

 #ifndef UINT8_MAX
 /** The largest value an 8 bit unsigned integer can hold @stable ICU 2.0 */
 #   define UINT8_MAX       ((uint8_t)(255U))
 #endif
 #ifndef UINT16_MAX
 /** The largest value a 16 bit unsigned integer can hold @stable ICU 2.0 */
 #   define UINT16_MAX      ((uint16_t)(65535U))
 #endif
 #ifndef UINT32_MAX
 /** The largest value a 32 bit unsigned integer can hold @stable ICU 2.0 */
 #   define UINT32_MAX      ((uint32_t)(4294967295U))
 #endif

 #if defined(U_INT64_T_UNAVAILABLE)
 # error int64_t is required for decimal format and rule-based number format.
 #else
 # ifndef INT64_C
 /**
  * Provides a platform independent way to specify a signed 64-bit integer constant.
  * note: may be wrong for some 64 bit platforms - ensure your compiler provides INT64_C
  * @stable ICU 2.8
  */
 #   define INT64_C(c) c ## LL
 # endif
 # ifndef UINT64_C
 /**
  * Provides a platform independent way to specify an unsigned 64-bit integer constant.
  * note: may be wrong for some 64 bit platforms - ensure your compiler provides UINT64_C
  * @stable ICU 2.8
  */
 #   define UINT64_C(c) c ## ULL
 # endif
 # ifndef U_INT64_MIN
 /** The smallest value a 64 bit signed integer can hold @stable ICU 2.8 */
 #     define U_INT64_MIN       ((int64_t)(INT64_C(-9223372036854775807)-1))
 # endif
 # ifndef U_INT64_MAX
 /** The largest value a 64 bit signed integer can hold @stable ICU 2.8 */
 #     define U_INT64_MAX       ((int64_t)(INT64_C(9223372036854775807)))
 # endif
 # ifndef U_UINT64_MAX
 /** The largest value a 64 bit unsigned integer can hold @stable ICU 2.8 */
 #     define U_UINT64_MAX      ((uint64_t)(UINT64_C(18446744073709551615)))
 # endif
 #endif

 /*==========================================================================*/
 /* Boolean data type                                                        */
 /*==========================================================================*/

 /** The ICU boolean type @stable ICU 2.0 */
 typedef int8_t UBool;

 #ifndef TRUE
 /** The TRUE value of a UBool @stable ICU 2.0 */
 #   define TRUE  1
 #endif
 #ifndef FALSE
 /** The FALSE value of a UBool @stable ICU 2.0 */
 #   define FALSE 0
 #endif


 /*==========================================================================*/
 /* Unicode data types                                                       */
 /*==========================================================================*/

 /* wchar_t-related definitions -------------------------------------------- */

 /*
  * \def U_WCHAR_IS_UTF16
  * Defined if wchar_t uses UTF-16.
  *
  * @stable ICU 2.0
  */
 /*
  * \def U_WCHAR_IS_UTF32
  * Defined if wchar_t uses UTF-32.
  *
  * @stable ICU 2.0
  */
 #if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
 #   if defined(__STDC_ISO_10646__) || defined(STARBOARD)
 #       if (U_SIZEOF_WCHAR_T==2)
 #           define U_WCHAR_IS_UTF16
 #       elif (U_SIZEOF_WCHAR_T==4)
 #           define  U_WCHAR_IS_UTF32
 #       endif
 #   elif defined __UCS2__
 #       if (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400) && (U_SIZEOF_WCHAR_T==2)
 #           define U_WCHAR_IS_UTF16
 #       endif
 #   elif defined(__UCS4__) || (U_PLATFORM == U_PF_OS400 && defined(__UTF32__))
 #       if (U_SIZEOF_WCHAR_T==4)
 #           define U_WCHAR_IS_UTF32
 #       endif
 #   elif U_PLATFORM_IS_DARWIN_BASED || (U_SIZEOF_WCHAR_T==4 && U_PLATFORM_IS_LINUX_BASED)
 #       define U_WCHAR_IS_UTF32
 #   elif U_PLATFORM_HAS_WIN32_API
 #       define U_WCHAR_IS_UTF16
 #   endif
 #endif

 /* UChar and UChar32 definitions -------------------------------------------- */

 /** Number of bytes in a UChar. @stable ICU 2.0 */
 #define U_SIZEOF_UCHAR 2

 /**
  * \var UChar
  * Define UChar to be UCHAR_TYPE, if that is #defined (for example, to char16_t),
  * or wchar_t if that is 16 bits wide; always assumed to be unsigned.
  * If neither is available, then define UChar to be uint16_t.
  *
  * This makes the definition of UChar platform-dependent
  * but allows direct string type compatibility with platforms with
  * 16-bit wchar_t types.
  *
  * @stable ICU 4.4
  */
 #if defined(UCHAR_TYPE)
     typedef UCHAR_TYPE UChar;
 /* Not #elif U_HAVE_CHAR16_T -- because that is type-incompatible with pre-C++11 callers
     typedef char16_t UChar;  */
 #elif U_SIZEOF_WCHAR_T==2
     typedef wchar_t UChar;
 #elif defined(__CHAR16_TYPE__)
     typedef __CHAR16_TYPE__ UChar;
 #else
     typedef uint16_t UChar;
 #endif

 /**
  * Define UChar32 as a type for single Unicode code points.
  * UChar32 is a signed 32-bit integer (same as int32_t).
  *
  * The Unicode code point range is 0..0x10ffff.
  * All other values (negative or >=0x110000) are illegal as Unicode code points.
  * They may be used as sentinel values to indicate "done", "error"
  * or similar non-code point conditions.
  *
  * Before ICU 2.4 (Jitterbug 2146), UChar32 was defined
  * to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned)
  * or else to be uint32_t.
  * That is, the definition of UChar32 was platform-dependent.
  *
  * @see U_SENTINEL
  * @stable ICU 2.4
  */
 typedef int32_t UChar32;

 /**
  * This value is intended for sentinel values for APIs that
  * (take or) return single code points (UChar32).
  * It is outside of the Unicode code point range 0..0x10ffff.
  *
  * For example, a "done" or "error" value in a new API
  * could be indicated with U_SENTINEL.
  *
  * ICU APIs designed before ICU 2.4 usually define service-specific "done"
  * values, mostly 0xffff.
  * Those may need to be distinguished from
  * actual U+ffff text contents by calling functions like
  * CharacterIterator::hasNext() or UnicodeString::length().
  *
  * @return -1
  * @see UChar32
  * @stable ICU 2.4
  */
 #define U_SENTINEL (-1)

 #include "unicode/urename.h"

 #endif
	/*
	******************************************************************************
	*
	* Copyright (C) 1999-2015, International Business Machines
	* Corporation and others. All Rights Reserved.
	*
	******************************************************************************
	* file name: umachine.h
	* encoding: US-ASCII
	* tab size: 8 (not used)
	* indentation:4
	*
	* created on: 1999sep13
	* created by: Markus W. Scherer
	*
	* This file defines basic types and constants for ICU to be
	* platform-independent. umachine.h and utf.h are included into
	* utypes.h to provide all the general definitions for ICU.
	* All of these definitions used to be in utypes.h before
	* the UTF-handling macros made this unmaintainable.
	*/

	#ifndef __UMACHINE_H__
	#define __UMACHINE_H__


	/**
	* \file
	* \brief Basic types and constants for UTF
	*
	* <h2> Basic types and constants for UTF </h2>
	* This file defines basic types and constants for utf.h to be
	* platform-independent. umachine.h and utf.h are included into
	* utypes.h to provide all the general definitions for ICU.
	* All of these definitions used to be in utypes.h before
	* the UTF-handling macros made this unmaintainable.
	*
	*/
	/==========================================================================/
	/* Include platform-dependent definitions */
	/* which are contained in the platform-specific file platform.h */
	/==========================================================================/

	#include "unicode/ptypes.h" /* platform.h is included in ptypes.h */

	/*
	* ANSI C headers:
	* stddef.h defines wchar_t
	*/
	#if !defined(STARBOARD)
	#include <stddef.h>
	#endif

	/==========================================================================/
	/* For C wrappers, we use the symbol U_STABLE. */
	/* This works properly if the includer is C or C++. */
	/* Functions are declared U_STABLE return-type U_EXPORT2 function-name()... */
	/==========================================================================/

	/**
	* \def U_CFUNC
	* This is used in a declaration of a library private ICU C function.
	* @stable ICU 2.4
	*/

	/**
	* \def U_CDECL_BEGIN
	* This is used to begin a declaration of a library private ICU C API.
	* @stable ICU 2.4
	*/

	/**
	* \def U_CDECL_END
	* This is used to end a declaration of a library private ICU C API
	* @stable ICU 2.4
	*/

	#ifdef __cplusplus
	# define U_CFUNC extern "C"
	# define U_CDECL_BEGIN extern "C" {
	# define U_CDECL_END }
	#else
	# define U_CFUNC extern
	# define U_CDECL_BEGIN
	# define U_CDECL_END
	#endif

	#ifndef U_ATTRIBUTE_DEPRECATED
	/**
	* \def U_ATTRIBUTE_DEPRECATED
	* This is used for GCC specific attributes
	* @internal
	*/
	#if U_GCC_MAJOR_MINOR >= 302
	# define U_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated))
	/**
	* \def U_ATTRIBUTE_DEPRECATED
	* This is used for Visual C++ specific attributes
	* @internal
	*/
	#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
	# define U_ATTRIBUTE_DEPRECATED __declspec(deprecated)
	#else
	# define U_ATTRIBUTE_DEPRECATED
	#endif
	#endif

	/** This is used to declare a function as a public ICU C API @stable ICU 2.0*/
	#define U_CAPI U_CFUNC U_EXPORT
	/** This is used to declare a function as a stable public ICU C API*/
	#define U_STABLE U_CAPI
	/** This is used to declare a function as a draft public ICU C API */
	#define U_DRAFT U_CAPI
	/** This is used to declare a function as a deprecated public ICU C API */
	#define U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED
	/** This is used to declare a function as an obsolete public ICU C API */
	#define U_OBSOLETE U_CAPI
	/** This is used to declare a function as an internal ICU C API */
	#define U_INTERNAL U_CAPI

	/**
	* \def U_OVERRIDE
	* Defined to the C++11 "override" keyword if available.
	* Denotes a class or member which is an override of the base class.
	* May result in an error if it applied to something not an override.
	* @internal
	*/

	/**
	* \def U_FINAL
	* Defined to the C++11 "final" keyword if available.
	* Denotes a class or member which may not be overridden in subclasses.
	* May result in an error if subclasses attempt to override.
	* @internal
	*/

	#if U_CPLUSPLUS_VERSION >= 11
	/* C++11 */
	#ifndef U_OVERRIDE
	#define U_OVERRIDE override
	#endif
	#ifndef U_FINAL
	#define U_FINAL final
	#endif
	#else
	/* not C++11 - define to nothing */
	#ifndef U_OVERRIDE
	#define U_OVERRIDE
	#endif
	#ifndef U_FINAL
	#define U_FINAL
	#endif
	#endif

	/==========================================================================/
	/* limits for int32_t etc., like in POSIX inttypes.h */
	/==========================================================================/

	#ifndef INT8_MIN
	/** The smallest value an 8 bit signed integer can hold @stable ICU 2.0 */
	# define INT8_MIN ((int8_t)(-128))
	#endif
	#ifndef INT16_MIN
	/** The smallest value a 16 bit signed integer can hold @stable ICU 2.0 */
	# define INT16_MIN ((int16_t)(-32767-1))
	#endif
	#ifndef INT32_MIN
	/** The smallest value a 32 bit signed integer can hold @stable ICU 2.0 */
	# define INT32_MIN ((int32_t)(-2147483647-1))
	#endif

	#ifndef INT8_MAX
	/** The largest value an 8 bit signed integer can hold @stable ICU 2.0 */
	# define INT8_MAX ((int8_t)(127))
	#endif
	#ifndef INT16_MAX
	/** The largest value a 16 bit signed integer can hold @stable ICU 2.0 */
	# define INT16_MAX ((int16_t)(32767))
	#endif
	#ifndef INT32_MAX
	/** The largest value a 32 bit signed integer can hold @stable ICU 2.0 */
	# define INT32_MAX ((int32_t)(2147483647))
	#endif

	#ifndef UINT8_MAX
	/** The largest value an 8 bit unsigned integer can hold @stable ICU 2.0 */
	# define UINT8_MAX ((uint8_t)(255U))
	#endif
	#ifndef UINT16_MAX
	/** The largest value a 16 bit unsigned integer can hold @stable ICU 2.0 */
	# define UINT16_MAX ((uint16_t)(65535U))
	#endif
	#ifndef UINT32_MAX
	/** The largest value a 32 bit unsigned integer can hold @stable ICU 2.0 */
	# define UINT32_MAX ((uint32_t)(4294967295U))
	#endif

	#if defined(U_INT64_T_UNAVAILABLE)
	# error int64_t is required for decimal format and rule-based number format.
	#else
	# ifndef INT64_C
	/**
	* Provides a platform independent way to specify a signed 64-bit integer constant.
	* note: may be wrong for some 64 bit platforms - ensure your compiler provides INT64_C
	* @stable ICU 2.8
	*/
	# define INT64_C(c) c ## LL
	# endif
	# ifndef UINT64_C
	/**
	* Provides a platform independent way to specify an unsigned 64-bit integer constant.
	* note: may be wrong for some 64 bit platforms - ensure your compiler provides UINT64_C
	* @stable ICU 2.8
	*/
	# define UINT64_C(c) c ## ULL
	# endif
	# ifndef U_INT64_MIN
	/** The smallest value a 64 bit signed integer can hold @stable ICU 2.8 */
	# define U_INT64_MIN ((int64_t)(INT64_C(-9223372036854775807)-1))
	# endif
	# ifndef U_INT64_MAX
	/** The largest value a 64 bit signed integer can hold @stable ICU 2.8 */
	# define U_INT64_MAX ((int64_t)(INT64_C(9223372036854775807)))
	# endif
	# ifndef U_UINT64_MAX
	/** The largest value a 64 bit unsigned integer can hold @stable ICU 2.8 */
	# define U_UINT64_MAX ((uint64_t)(UINT64_C(18446744073709551615)))
	# endif
	#endif

	/==========================================================================/
	/* Boolean data type */
	/==========================================================================/

	/** The ICU boolean type @stable ICU 2.0 */
	typedef int8_t UBool;

	#ifndef TRUE
	/** The TRUE value of a UBool @stable ICU 2.0 */
	# define TRUE 1
	#endif
	#ifndef FALSE
	/** The FALSE value of a UBool @stable ICU 2.0 */
	# define FALSE 0
	#endif


	/==========================================================================/
	/* Unicode data types */
	/==========================================================================/

	/* wchar_t-related definitions -------------------------------------------- */

	/*
	* \def U_WCHAR_IS_UTF16
	* Defined if wchar_t uses UTF-16.
	*
	* @stable ICU 2.0
	*/
	/*
	* \def U_WCHAR_IS_UTF32
	* Defined if wchar_t uses UTF-32.
	*
	* @stable ICU 2.0
	*/
	#if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
	# if defined(__STDC_ISO_10646__) \|\| defined(STARBOARD)
	# if (U_SIZEOF_WCHAR_T==2)
	# define U_WCHAR_IS_UTF16
	# elif (U_SIZEOF_WCHAR_T==4)
	# define U_WCHAR_IS_UTF32
	# endif
	# elif defined __UCS2__
	# if (U_PF_OS390 <= U_PLATFORM && U_PLATFORM <= U_PF_OS400) && (U_SIZEOF_WCHAR_T==2)
	# define U_WCHAR_IS_UTF16
	# endif
	# elif defined(__UCS4__) \|\| (U_PLATFORM == U_PF_OS400 && defined(__UTF32__))
	# if (U_SIZEOF_WCHAR_T==4)
	# define U_WCHAR_IS_UTF32
	# endif
	# elif U_PLATFORM_IS_DARWIN_BASED \|\| (U_SIZEOF_WCHAR_T==4 && U_PLATFORM_IS_LINUX_BASED)
	# define U_WCHAR_IS_UTF32
	# elif U_PLATFORM_HAS_WIN32_API
	# define U_WCHAR_IS_UTF16
	# endif
	#endif

	/* UChar and UChar32 definitions -------------------------------------------- */

	/** Number of bytes in a UChar. @stable ICU 2.0 */
	#define U_SIZEOF_UCHAR 2

	/**
	* \var UChar
	* Define UChar to be UCHAR_TYPE, if that is #defined (for example, to char16_t),
	* or wchar_t if that is 16 bits wide; always assumed to be unsigned.
	* If neither is available, then define UChar to be uint16_t.
	*
	* This makes the definition of UChar platform-dependent
	* but allows direct string type compatibility with platforms with
	* 16-bit wchar_t types.
	*
	* @stable ICU 4.4
	*/
	#if defined(UCHAR_TYPE)
	typedef UCHAR_TYPE UChar;
	/* Not #elif U_HAVE_CHAR16_T -- because that is type-incompatible with pre-C++11 callers
	typedef char16_t UChar; */
	#elif U_SIZEOF_WCHAR_T==2
	typedef wchar_t UChar;
	#elif defined(__CHAR16_TYPE__)
	typedef __CHAR16_TYPE__ UChar;
	#else
	typedef uint16_t UChar;
	#endif

	/**
	* Define UChar32 as a type for single Unicode code points.
	* UChar32 is a signed 32-bit integer (same as int32_t).
	*
	* The Unicode code point range is 0..0x10ffff.
	* All other values (negative or >=0x110000) are illegal as Unicode code points.
	* They may be used as sentinel values to indicate "done", "error"
	* or similar non-code point conditions.
	*
	* Before ICU 2.4 (Jitterbug 2146), UChar32 was defined
	* to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned)
	* or else to be uint32_t.
	* That is, the definition of UChar32 was platform-dependent.
	*
	* @see U_SENTINEL
	* @stable ICU 2.4
	*/
	typedef int32_t UChar32;

	/**
	* This value is intended for sentinel values for APIs that
	* (take or) return single code points (UChar32).
	* It is outside of the Unicode code point range 0..0x10ffff.
	*
	* For example, a "done" or "error" value in a new API
	* could be indicated with U_SENTINEL.
	*
	* ICU APIs designed before ICU 2.4 usually define service-specific "done"
	* values, mostly 0xffff.
	* Those may need to be distinguished from
	* actual U+ffff text contents by calling functions like
	* CharacterIterator::hasNext() or UnicodeString::length().
	*
	* @return -1
	* @see UChar32
	* @stable ICU 2.4
	*/
	#define U_SENTINEL (-1)

	#include "unicode/urename.h"

	#endif