1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP_UCHAR_H
11 #define _LIBCPP_UCHAR_H
12 
13 /*
14     uchar.h synopsis // since C++11
15 
16 Macros:
17 
18     __STDC_UTF_16__
19     __STDC_UTF_32__
20 
21 Types:
22 
23   mbstate_t
24   size_t
25 
26 size_t mbrtoc8(char8_t* pc8, const char* s, size_t n, mbstate_t* ps);     // since C++20
27 size_t c8rtomb(char* s, char8_t c8, mbstate_t* ps);                       // since C++20
28 size_t mbrtoc16(char16_t* pc16, const char* s, size_t n, mbstate_t* ps);
29 size_t c16rtomb(char* s, char16_t c16, mbstate_t* ps);
30 size_t mbrtoc32(char32_t* pc32, const char* s, size_t n, mbstate_t* ps);
31 size_t c32rtomb(char* s, char32_t c32, mbstate_t* ps);
32 
33 */
34 
35 #include <__config>
36 
37 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
38 #  pragma GCC system_header
39 #endif
40 
41 #if !defined(_LIBCPP_CXX03_LANG)
42 
43 // Some platforms don't implement <uchar.h> and we don't want to give a hard
44 // error on those platforms. When the platform doesn't provide <uchar.h>, at
45 // least include <stddef.h> so we get the declaration for size_t, and try to
46 // get the declaration of mbstate_t too.
47 #if __has_include_next(<uchar.h>)
48 # include_next <uchar.h>
49 #else
50 # include <__mbstate_t.h>
51 # include <stddef.h>
52 #endif
53 
54 #endif // _LIBCPP_CXX03_LANG
55 
56 #endif // _LIBCPP_UCHAR_H
57