1*cb14a3feSDimitry Andric //===----------------------------------------------------------------------===// 2*cb14a3feSDimitry Andric // 3*cb14a3feSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*cb14a3feSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*cb14a3feSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*cb14a3feSDimitry Andric // 7*cb14a3feSDimitry Andric //===----------------------------------------------------------------------===// 8*cb14a3feSDimitry Andric 9*cb14a3feSDimitry Andric #include <__availability> 10*cb14a3feSDimitry Andric #include <__config> 11*cb14a3feSDimitry Andric #ifndef _LIBCPP_HAS_NO_FILESYSTEM 12*cb14a3feSDimitry Andric # include <fstream> 13*cb14a3feSDimitry Andric #endif 14*cb14a3feSDimitry Andric #include <ostream> 15*cb14a3feSDimitry Andric 16*cb14a3feSDimitry Andric #include "std_stream.h" 17*cb14a3feSDimitry Andric 18*cb14a3feSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 19*cb14a3feSDimitry Andric 20*cb14a3feSDimitry Andric _LIBCPP_AVAILABILITY_PRINT _LIBCPP_EXPORTED_FROM_ABI FILE* __get_ostream_file(ostream& __os) { 21*cb14a3feSDimitry Andric // dynamic_cast requires RTTI, this only affects users whose vendor builds 22*cb14a3feSDimitry Andric // the dylib with RTTI disabled. It does not affect users who build with RTTI 23*cb14a3feSDimitry Andric // disabled but use a dylib where the RTTI is enabled. 24*cb14a3feSDimitry Andric // 25*cb14a3feSDimitry Andric // Returning a nullptr means the stream is not considered a terminal and the 26*cb14a3feSDimitry Andric // special terminal handling is not done. The terminal handling is mainly of 27*cb14a3feSDimitry Andric // importance on Windows. 28*cb14a3feSDimitry Andric #ifndef _LIBCPP_HAS_NO_RTTI 29*cb14a3feSDimitry Andric auto* __rdbuf = __os.rdbuf(); 30*cb14a3feSDimitry Andric # ifndef _LIBCPP_HAS_NO_FILESYSTEM 31*cb14a3feSDimitry Andric if (auto* __buffer = dynamic_cast<filebuf*>(__rdbuf)) 32*cb14a3feSDimitry Andric return __buffer->__file_; 33*cb14a3feSDimitry Andric # endif 34*cb14a3feSDimitry Andric 35*cb14a3feSDimitry Andric if (auto* __buffer = dynamic_cast<__stdoutbuf<char>*>(__rdbuf)) 36*cb14a3feSDimitry Andric return __buffer->__file_; 37*cb14a3feSDimitry Andric #endif // _LIBCPP_HAS_NO_RTTI 38*cb14a3feSDimitry Andric 39*cb14a3feSDimitry Andric return nullptr; 40*cb14a3feSDimitry Andric } 41*cb14a3feSDimitry Andric 42*cb14a3feSDimitry Andric _LIBCPP_END_NAMESPACE_STD 43