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ICU 76.1 76.1
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Basic types and constants for UTF. More...
Go to the source code of this file.
Macros | |
| #define | U_CFUNC extern |
| This is used in a declaration of a library private ICU C function. | |
| #define | U_CDECL_BEGIN |
| This is used to begin a declaration of a library private ICU C API. | |
| #define | U_CDECL_END |
| This is used to end a declaration of a library private ICU C API. | |
| #define | U_ATTRIBUTE_DEPRECATED |
| This is used for GCC specific attributes. | |
| #define | U_CAPI U_CFUNC U_EXPORT |
| This is used to declare a function as a public ICU C API. | |
| #define | U_STABLE U_CAPI |
| Obsolete/same as U_CAPI; was used to declare a function as a stable public ICU C API. | |
| #define | U_DRAFT U_CAPI |
| Obsolete/same as U_CAPI; was used to declare a function as a draft public ICU C API | |
| #define | U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED |
| This is used to declare a function as a deprecated public ICU C API | |
| #define | U_OBSOLETE U_CAPI |
| Obsolete/same as U_CAPI; was used to declare a function as an obsolete public ICU C API | |
| #define | U_INTERNAL U_CAPI |
| Obsolete/same as U_CAPI; was used to declare a function as an internal ICU C API | |
| #define | UPRV_BLOCK_MACRO_BEGIN do |
| Defined as the "do" keyword by default. | |
| #define | UPRV_BLOCK_MACRO_END while (false) |
| Defined as "while (false)" by default. | |
| #define | INT8_MIN ((int8_t)(-128)) |
| The smallest value an 8 bit signed integer can hold. | |
| #define | INT16_MIN ((int16_t)(-32767-1)) |
| The smallest value a 16 bit signed integer can hold. | |
| #define | INT32_MIN ((int32_t)(-2147483647-1)) |
| The smallest value a 32 bit signed integer can hold. | |
| #define | INT8_MAX ((int8_t)(127)) |
| The largest value an 8 bit signed integer can hold. | |
| #define | INT16_MAX ((int16_t)(32767)) |
| The largest value a 16 bit signed integer can hold. | |
| #define | INT32_MAX ((int32_t)(2147483647)) |
| The largest value a 32 bit signed integer can hold. | |
| #define | UINT8_MAX ((uint8_t)(255U)) |
| The largest value an 8 bit unsigned integer can hold. | |
| #define | UINT16_MAX ((uint16_t)(65535U)) |
| The largest value a 16 bit unsigned integer can hold. | |
| #define | UINT32_MAX ((uint32_t)(4294967295U)) |
| The largest value a 32 bit unsigned integer can hold. | |
| #define | INT64_C(c) c ## LL |
| Provides a platform independent way to specify a signed 64-bit integer constant. | |
| #define | UINT64_C(c) c ## ULL |
| Provides a platform independent way to specify an unsigned 64-bit integer constant. | |
| #define | U_INT64_MIN ((int64_t)(INT64_C(-9223372036854775807)-1)) |
| The smallest value a 64 bit signed integer can hold. | |
| #define | U_INT64_MAX ((int64_t)(INT64_C(9223372036854775807))) |
| The largest value a 64 bit signed integer can hold. | |
| #define | U_UINT64_MAX ((uint64_t)(UINT64_C(18446744073709551615))) |
| The largest value a 64 bit unsigned integer can hold. | |
| #define | U_DEFINE_FALSE_AND_TRUE 0 |
| Normally turns off defining macros FALSE=0 & TRUE=1 in public ICU headers. | |
| #define | TRUE 1 |
| The TRUE value of a UBool. | |
| #define | FALSE 0 |
| The FALSE value of a UBool. | |
| #define | U_SIZEOF_UCHAR 2 |
| Number of bytes in a UChar (always 2). | |
| #define | U_CHAR16_IS_TYPEDEF 0 |
| If 1, then char16_t is a typedef and not a real type (yet) | |
| #define | U_SENTINEL (-1) |
| This value is intended for sentinel values for APIs that (take or) return single code points (UChar32). | |
Typedefs | |
| typedef int8_t | UBool |
| The ICU boolean type, a signed-byte integer. | |
| typedef char16_t | UChar |
| The base type for UTF-16 code units and pointers. | |
| typedef uint16_t | OldUChar |
| Default ICU 58 definition of UChar. | |
| typedef int32_t | UChar32 |
| Define UChar32 as a type for single Unicode code points. | |
Basic types and constants for UTF.
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.
Definition in file umachine.h.
| #define FALSE 0 |
The FALSE value of a UBool.
Definition at line 283 of file umachine.h.
| #define INT16_MAX ((int16_t)(32767)) |
The largest value a 16 bit signed integer can hold.
Definition at line 182 of file umachine.h.
| #define INT16_MIN ((int16_t)(-32767-1)) |
The smallest value a 16 bit signed integer can hold.
Definition at line 169 of file umachine.h.
| #define INT32_MAX ((int32_t)(2147483647)) |
The largest value a 32 bit signed integer can hold.
Definition at line 186 of file umachine.h.
| #define INT32_MIN ((int32_t)(-2147483647-1)) |
The smallest value a 32 bit signed integer can hold.
Definition at line 173 of file umachine.h.
| #define INT64_C | ( | c | ) | c ## LL |
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
Definition at line 211 of file umachine.h.
| #define INT8_MAX ((int8_t)(127)) |
The largest value an 8 bit signed integer can hold.
Definition at line 178 of file umachine.h.
| #define INT8_MIN ((int8_t)(-128)) |
The smallest value an 8 bit signed integer can hold.
Definition at line 165 of file umachine.h.
| #define TRUE 1 |
The TRUE value of a UBool.
Definition at line 275 of file umachine.h.
| #define U_ATTRIBUTE_DEPRECATED |
This is used for GCC specific attributes.
Definition at line 105 of file umachine.h.
This is used to declare a function as a public ICU C API.
Definition at line 110 of file umachine.h.
| #define U_CDECL_BEGIN |
This is used to begin a declaration of a library private ICU C API.
Definition at line 85 of file umachine.h.
| #define U_CDECL_END |
This is used to end a declaration of a library private ICU C API.
Definition at line 86 of file umachine.h.
| #define U_CFUNC extern |
This is used in a declaration of a library private ICU C function.
Definition at line 84 of file umachine.h.
| #define U_CHAR16_IS_TYPEDEF 0 |
If 1, then char16_t is a typedef and not a real type (yet)
Definition at line 342 of file umachine.h.
| #define U_DEFINE_FALSE_AND_TRUE 0 |
Normally turns off defining macros FALSE=0 & TRUE=1 in public ICU headers.
These obsolete macros sometimes break compilation of other code that defines enum constants or similar with these names. C++ has long defined bool/false/true. C99 also added definitions for these, although as macros; see stdbool.h.
You may transitionally define U_DEFINE_FALSE_AND_TRUE=1 if you need time to migrate code.
Definition at line 265 of file umachine.h.
| #define U_DEPRECATED U_CAPI U_ATTRIBUTE_DEPRECATED |
This is used to declare a function as a deprecated public ICU C API
Definition at line 116 of file umachine.h.
| #define U_DRAFT U_CAPI |
Obsolete/same as U_CAPI; was used to declare a function as a draft public ICU C API
Definition at line 114 of file umachine.h.
| #define U_INT64_MAX ((int64_t)(INT64_C(9223372036854775807))) |
The largest value a 64 bit signed integer can hold.
Definition at line 227 of file umachine.h.
| #define U_INT64_MIN ((int64_t)(INT64_C(-9223372036854775807)-1)) |
The smallest value a 64 bit signed integer can hold.
Definition at line 223 of file umachine.h.
| #define U_INTERNAL U_CAPI |
Obsolete/same as U_CAPI; was used to declare a function as an internal ICU C API
Definition at line 120 of file umachine.h.
| #define U_OBSOLETE U_CAPI |
Obsolete/same as U_CAPI; was used to declare a function as an obsolete public ICU C API
Definition at line 118 of file umachine.h.
| #define U_SENTINEL (-1) |
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().
Definition at line 447 of file umachine.h.
| #define U_SIZEOF_UCHAR 2 |
| #define U_STABLE U_CAPI |
Obsolete/same as U_CAPI; was used to declare a function as a stable public ICU C API.
Definition at line 112 of file umachine.h.
| #define U_UINT64_MAX ((uint64_t)(UINT64_C(18446744073709551615))) |
The largest value a 64 bit unsigned integer can hold.
Definition at line 231 of file umachine.h.
| #define UINT16_MAX ((uint16_t)(65535U)) |
The largest value a 16 bit unsigned integer can hold.
Definition at line 195 of file umachine.h.
| #define UINT32_MAX ((uint32_t)(4294967295U)) |
The largest value a 32 bit unsigned integer can hold.
Definition at line 199 of file umachine.h.
| #define UINT64_C | ( | c | ) | c ## ULL |
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
Definition at line 219 of file umachine.h.
| #define UINT8_MAX ((uint8_t)(255U)) |
The largest value an 8 bit unsigned integer can hold.
Definition at line 191 of file umachine.h.
| #define UPRV_BLOCK_MACRO_BEGIN do |
Defined as the "do" keyword by default.
Definition at line 147 of file umachine.h.
| #define UPRV_BLOCK_MACRO_END while (false) |
Defined as "while (false)" by default.
Definition at line 156 of file umachine.h.
Default ICU 58 definition of UChar.
A base type for UTF-16 code units and pointers. Unsigned 16-bit integer.
Define OldUChar to be wchar_t if that is 16 bits wide. If wchar_t is not 16 bits wide, then define UChar to be uint16_t.
This makes the definition of OldUChar platform-dependent but allows direct string type compatibility with platforms with 16-bit wchar_t types.
This is how UChar was defined in ICU 58, for transition convenience. Exception: ICU 58 UChar was defined to UCHAR_TYPE if that macro was defined. The current UChar responds to UCHAR_TYPE but OldUChar does not.
Definition at line 407 of file umachine.h.
| typedef int8_t UBool |
The ICU boolean type, a signed-byte integer.
ICU-specific for historical reasons: The C and C++ standards used to not define type bool. Also provides a fixed type definition, as opposed to type bool whose details (e.g., sizeof) may vary by compiler and between C and C++.
Definition at line 247 of file umachine.h.
The base type for UTF-16 code units and pointers.
Unsigned 16-bit integer. Starting with ICU 59, C++ API uses char16_t directly, while C API continues to use UChar.
UChar is configurable by defining the macro UCHAR_TYPE on the preprocessor or compiler command line: -DUCHAR_TYPE=uint16_t or -DUCHAR_TYPE=wchar_t (if U_SIZEOF_WCHAR_T==2) etc. (The UCHAR_TYPE can also be #defined earlier in this file, for outside the ICU library code.) This is for transitional use from application code that uses uint16_t or wchar_t for UTF-16.
The default is UChar=char16_t.
C++11 defines char16_t as bit-compatible with uint16_t, but as a distinct type.
In C, char16_t is a simple typedef of uint_least16_t. ICU requires uint_least16_t=uint16_t for data memory mapping. On macOS, char16_t is not available because the uchar.h standard header is missing.
Definition at line 378 of file umachine.h.
| typedef int32_t UChar32 |
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.
Definition at line 427 of file umachine.h.
1.9.8