libcxx/include/uchar.h

   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