1 // Iostreams base classes -*- C++ -*- 2 3 // Copyright (C) 1997-2018 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 // 26 // ISO C++ 14882:1998: 27.4.2.1.1 Class ios_base::failure 27 // 28 29 #define _GLIBCXX_USE_CXX11_ABI 0 30 #include <ios> 31 32 #if _GLIBCXX_USE_DUAL_ABI && __cpp_rtti 33 #include <cxxabi.h> 34 #include <typeinfo> 35 #endif 36 37 #ifdef _GLIBCXX_USE_NLS 38 # include <libintl.h> 39 # define _(msgid) gettext (msgid) 40 #else 41 # define _(msgid) (msgid) 42 #endif 43 44 namespace std _GLIBCXX_VISIBILITY(default) 45 { 46 _GLIBCXX_BEGIN_NAMESPACE_VERSION 47 48 ios_base::failure::failure(const string& __str) throw() 49 : _M_msg(__str) { } 50 51 ios_base::failure::~failure() throw() 52 { } 53 54 const char* 55 ios_base::failure::what() const throw() 56 { return _M_msg.c_str(); } 57 58 #if _GLIBCXX_USE_DUAL_ABI 59 // When the dual ABI is enabled __throw_ios_failure() is defined in 60 // src/c++11/cxx11-ios_failure.cc 61 #if __cpp_rtti 62 // If RTTI is enabled the exception type thrown will use these functions to 63 // construct/destroy a gcc4-compatible ios::failure object in a buffer, 64 // and to catch that object via a handler of the gcc4-compatible type. 65 void 66 __construct_ios_failure(void* buf, const char* msg) 67 { ::new(buf) ios_base::failure(msg); } 68 69 void 70 __destroy_ios_failure(void* buf) 71 { static_cast<ios_base::failure*>(buf)->~failure(); } 72 73 bool 74 __is_ios_failure_handler(const __cxxabiv1::__class_type_info* type) 75 { return *type == typeid(ios::failure); } 76 77 namespace { 78 // C++98-style static assertions to ensure ios::failure fits in a buffer 79 // with the same size and alignment as runtime_error: 80 typedef char S[1 / (sizeof(ios::failure) <= sizeof(runtime_error))]; 81 typedef char A[1 / (__alignof(ios::failure) <= __alignof(runtime_error))]; 82 } 83 #endif // __cpp_rtti 84 85 #else // ! _GLIBCXX_USE_DUAL_ABI 86 87 void 88 __throw_ios_failure(const char* __s __attribute__((unused))) 89 { _GLIBCXX_THROW_OR_ABORT(ios::failure(_(__s))); } 90 91 #endif 92 93 _GLIBCXX_END_NAMESPACE_VERSION 94 } // namespace 95