1349cc55cSDimitry Andric // -*- C++ -*- 2349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 3349cc55cSDimitry Andric // 4349cc55cSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5349cc55cSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6349cc55cSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7349cc55cSDimitry Andric // 8349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 9349cc55cSDimitry Andric 10349cc55cSDimitry Andric #ifndef _LIBCPP___MBSTATE_T_H 11349cc55cSDimitry Andric #define _LIBCPP___MBSTATE_T_H 12349cc55cSDimitry Andric 13349cc55cSDimitry Andric #include <__config> 14349cc55cSDimitry Andric 15349cc55cSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16349cc55cSDimitry Andric # pragma GCC system_header 17349cc55cSDimitry Andric #endif 18349cc55cSDimitry Andric 19*06c3fb27SDimitry Andric // The goal of this header is to provide mbstate_t without requiring all of 20*06c3fb27SDimitry Andric // <uchar.h> or <wchar.h>. It's also used by the libc++ versions of <uchar.h> 21*06c3fb27SDimitry Andric // and <wchar.h> to get mbstate_t when the C library doesn't provide <uchar.h> 22*06c3fb27SDimitry Andric // or <wchar.h>, hence the #include_next of those headers instead of #include. 23*06c3fb27SDimitry Andric // (e.g. if <wchar.h> isn't present in the C library, the libc++ <wchar.h> 24*06c3fb27SDimitry Andric // will include this header. This header needs to not turn around and cyclically 25*06c3fb27SDimitry Andric // include <wchar.h>, but fall through to <uchar.h>.) 26349cc55cSDimitry Andric // 27*06c3fb27SDimitry Andric // This does not define std::mbstate_t -- this only brings in the declaration 28*06c3fb27SDimitry Andric // in the global namespace. 29349cc55cSDimitry Andric 30*06c3fb27SDimitry Andric // We define this here to support older versions of glibc <wchar.h> that do 31*06c3fb27SDimitry Andric // not define this for clang. This is also set in libc++'s <wchar.h> header, 32*06c3fb27SDimitry Andric // and we need to do so here too to avoid a different function signature given 33*06c3fb27SDimitry Andric // a different include order. 34*06c3fb27SDimitry Andric #ifdef __cplusplus 35*06c3fb27SDimitry Andric # define __CORRECT_ISO_CPP_WCHAR_H_PROTO 36*06c3fb27SDimitry Andric #endif 37*06c3fb27SDimitry Andric 38*06c3fb27SDimitry Andric #if defined(_LIBCPP_HAS_MUSL_LIBC) 39*06c3fb27SDimitry Andric # define __NEED_mbstate_t 40*06c3fb27SDimitry Andric # include <bits/alltypes.h> 41*06c3fb27SDimitry Andric # undef __NEED_mbstate_t 42349cc55cSDimitry Andric #elif __has_include(<bits/types/mbstate_t.h>) 43349cc55cSDimitry Andric # include <bits/types/mbstate_t.h> // works on most Unixes 44349cc55cSDimitry Andric #elif __has_include(<sys/_types/_mbstate_t.h>) 45349cc55cSDimitry Andric # include <sys/_types/_mbstate_t.h> // works on Darwin 46*06c3fb27SDimitry Andric #elif !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) && __has_include_next(<wchar.h>) 47*06c3fb27SDimitry Andric # include_next <wchar.h> // fall back to the C standard provider of mbstate_t 48*06c3fb27SDimitry Andric #elif __has_include_next(<uchar.h>) 49*06c3fb27SDimitry Andric # include_next <uchar.h> // <uchar.h> is also required to make mbstate_t visible 50349cc55cSDimitry Andric #else 51*06c3fb27SDimitry Andric # error "We don't know how to get the definition of mbstate_t without <wchar.h> on your platform." 52349cc55cSDimitry Andric #endif 53349cc55cSDimitry Andric 54349cc55cSDimitry Andric #endif // _LIBCPP___MBSTATE_T_H 55