1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <__config> 10 #include <cstdio> 11 #include <fstream> 12 13 #if defined(_LIBCPP_WIN32API) 14 # define WIN32_LEAN_AND_MEAN 15 # define NOMINMAX 16 # include <io.h> 17 # include <windows.h> 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 #if defined(_LIBCPP_WIN32API) 23 24 // Confirm that `HANDLE` is `void*` as implemented in `basic_filebuf` 25 static_assert(std::same_as<HANDLE, void*>); 26 27 _LIBCPP_EXPORTED_FROM_ABI void* __filebuf_windows_native_handle(FILE* __file) noexcept { 28 // https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/get-osfhandle?view=msvc-170 29 intptr_t __handle = _get_osfhandle(fileno(__file)); 30 if (__handle == -1) 31 return nullptr; 32 return reinterpret_cast<void*>(__handle); 33 } 34 35 #endif 36 37 _LIBCPP_END_NAMESPACE_STD 38