1*38fd1498Szrj // Iostreams base classes -*- C++ -*- 2*38fd1498Szrj 3*38fd1498Szrj // Copyright (C) 2014-2018 Free Software Foundation, Inc. 4*38fd1498Szrj // 5*38fd1498Szrj // This file is part of the GNU ISO C++ Library. This library is free 6*38fd1498Szrj // software; you can redistribute it and/or modify it under the 7*38fd1498Szrj // terms of the GNU General Public License as published by the 8*38fd1498Szrj // Free Software Foundation; either version 3, or (at your option) 9*38fd1498Szrj // any later version. 10*38fd1498Szrj 11*38fd1498Szrj // This library is distributed in the hope that it will be useful, 12*38fd1498Szrj // but WITHOUT ANY WARRANTY; without even the implied warranty of 13*38fd1498Szrj // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14*38fd1498Szrj // GNU General Public License for more details. 15*38fd1498Szrj 16*38fd1498Szrj // Under Section 7 of GPL version 3, you are granted additional 17*38fd1498Szrj // permissions described in the GCC Runtime Library Exception, version 18*38fd1498Szrj // 3.1, as published by the Free Software Foundation. 19*38fd1498Szrj 20*38fd1498Szrj // You should have received a copy of the GNU General Public License and 21*38fd1498Szrj // a copy of the GCC Runtime Library Exception along with this program; 22*38fd1498Szrj // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23*38fd1498Szrj // <http://www.gnu.org/licenses/>. 24*38fd1498Szrj 25*38fd1498Szrj // 26*38fd1498Szrj // ISO C++ 14882:2011: 27.5.3.1.1 Class ios_base::failure 27*38fd1498Szrj // 28*38fd1498Szrj 29*38fd1498Szrj #define _GLIBCXX_USE_CXX11_ABI 1 30*38fd1498Szrj #include <ios> 31*38fd1498Szrj #include <bits/functexcept.h> 32*38fd1498Szrj #include <cxxabi.h> 33*38fd1498Szrj 34*38fd1498Szrj #ifdef _GLIBCXX_USE_NLS 35*38fd1498Szrj # include <libintl.h> 36*38fd1498Szrj # define _(msgid) gettext (msgid) 37*38fd1498Szrj #else 38*38fd1498Szrj # define _(msgid) (msgid) 39*38fd1498Szrj #endif 40*38fd1498Szrj 41*38fd1498Szrj #if ! _GLIBCXX_USE_DUAL_ABI 42*38fd1498Szrj # error This file should not be compiled for this configuration. 43*38fd1498Szrj #endif 44*38fd1498Szrj 45*38fd1498Szrj namespace 46*38fd1498Szrj { 47*38fd1498Szrj struct io_error_category : std::error_category 48*38fd1498Szrj { 49*38fd1498Szrj virtual const char* name__anon540ba73c0111::io_error_category50*38fd1498Szrj name() const noexcept 51*38fd1498Szrj { return "iostream"; } 52*38fd1498Szrj 53*38fd1498Szrj _GLIBCXX_DEFAULT_ABI_TAG message__anon540ba73c0111::io_error_category54*38fd1498Szrj virtual std::string message(int __ec) const 55*38fd1498Szrj { 56*38fd1498Szrj std::string __msg; 57*38fd1498Szrj switch (std::io_errc(__ec)) 58*38fd1498Szrj { 59*38fd1498Szrj case std::io_errc::stream: 60*38fd1498Szrj __msg = "iostream error"; 61*38fd1498Szrj break; 62*38fd1498Szrj default: 63*38fd1498Szrj __msg = "Unknown error"; 64*38fd1498Szrj break; 65*38fd1498Szrj } 66*38fd1498Szrj return __msg; 67*38fd1498Szrj } 68*38fd1498Szrj }; 69*38fd1498Szrj 70*38fd1498Szrj const io_error_category& __io_category_instance()71*38fd1498Szrj __io_category_instance() noexcept 72*38fd1498Szrj { 73*38fd1498Szrj static const io_error_category __ec{}; 74*38fd1498Szrj return __ec; 75*38fd1498Szrj } 76*38fd1498Szrj 77*38fd1498Szrj } // namespace 78*38fd1498Szrj 79*38fd1498Szrj namespace std _GLIBCXX_VISIBILITY(default) 80*38fd1498Szrj { 81*38fd1498Szrj _GLIBCXX_BEGIN_NAMESPACE_VERSION 82*38fd1498Szrj 83*38fd1498Szrj const error_category& iostream_category()84*38fd1498Szrj iostream_category() noexcept 85*38fd1498Szrj { return __io_category_instance(); } 86*38fd1498Szrj failure(const string & __str)87*38fd1498Szrj ios_base::failure::failure(const string& __str) 88*38fd1498Szrj : system_error(io_errc::stream, __str) { } 89*38fd1498Szrj failure(const string & __str,const error_code & __ec)90*38fd1498Szrj ios_base::failure::failure(const string& __str, const error_code& __ec) 91*38fd1498Szrj : system_error(__ec, __str) { } 92*38fd1498Szrj failure(const char * __str,const error_code & __ec)93*38fd1498Szrj ios_base::failure::failure(const char* __str, const error_code& __ec) 94*38fd1498Szrj : system_error(__ec, __str) { } 95*38fd1498Szrj ~failure()96*38fd1498Szrj ios_base::failure::~failure() 97*38fd1498Szrj { } 98*38fd1498Szrj 99*38fd1498Szrj const char* what() const100*38fd1498Szrj ios_base::failure::what() const throw() 101*38fd1498Szrj { return runtime_error::what(); } 102*38fd1498Szrj 103*38fd1498Szrj #if __cpp_rtti 104*38fd1498Szrj // These functions are defined in src/c++98/ios_failure.cc 105*38fd1498Szrj extern void __construct_ios_failure(void*, const char*); 106*38fd1498Szrj extern void __destroy_ios_failure(void*); 107*38fd1498Szrj extern bool __is_ios_failure_handler(const __cxxabiv1::__class_type_info*); 108*38fd1498Szrj 109*38fd1498Szrj // The type thrown to report errors during stream buffer operations. 110*38fd1498Szrj // In addition to the ios::failure[abi:cxx11] base class it also has a 111*38fd1498Szrj // member of the gcc4-compatible ios::failure type (in an opaque buffer). 112*38fd1498Szrj struct __ios_failure : std::ios::failure 113*38fd1498Szrj { __ios_failurestd::__ios_failure114*38fd1498Szrj __ios_failure(const char* s) : failure(s) 115*38fd1498Szrj { __construct_ios_failure(buf, runtime_error::what()); } 116*38fd1498Szrj ~__ios_failurestd::__ios_failure117*38fd1498Szrj ~__ios_failure() 118*38fd1498Szrj { __destroy_ios_failure(buf); } 119*38fd1498Szrj 120*38fd1498Szrj // Use std::runtime_error as a proxy for the gcc4-compatible ios::failure 121*38fd1498Szrj // (which can't be declared here because _GLIBCXX_USE_CXX11_ABI == 1). 122*38fd1498Szrj // There are assertions in src/c++98/ios_failure.cc to ensure the size 123*38fd1498Szrj // and alignment assumptions are valid. 124*38fd1498Szrj alignas(runtime_error) unsigned char buf[sizeof(runtime_error)]; 125*38fd1498Szrj }; 126*38fd1498Szrj 127*38fd1498Szrj // Custom type info for __ios_failure. 128*38fd1498Szrj class __iosfail_type_info : __cxxabiv1::__si_class_type_info 129*38fd1498Szrj { 130*38fd1498Szrj ~__iosfail_type_info(); 131*38fd1498Szrj 132*38fd1498Szrj bool 133*38fd1498Szrj __do_upcast (const __class_type_info *dst_type, 134*38fd1498Szrj void **obj_ptr) const override; 135*38fd1498Szrj }; 136*38fd1498Szrj 137*38fd1498Szrj __iosfail_type_info::~__iosfail_type_info() = default; 138*38fd1498Szrj 139*38fd1498Szrj // This function gets called to see if an exception of type 140*38fd1498Szrj // __ios_failure can be upcast to the type in a catch handler. 141*38fd1498Szrj bool __do_upcast(const __class_type_info * dst_type,void ** obj_ptr) const142*38fd1498Szrj __iosfail_type_info::__do_upcast(const __class_type_info *dst_type, 143*38fd1498Szrj void **obj_ptr) const 144*38fd1498Szrj { 145*38fd1498Szrj // If the handler is for the gcc4-compatible ios::failure type then 146*38fd1498Szrj // catch the object stored in __ios_failure::buf instead of 147*38fd1498Szrj // the __ios_failure exception object itself. 148*38fd1498Szrj if (__is_ios_failure_handler(dst_type)) 149*38fd1498Szrj { 150*38fd1498Szrj *obj_ptr = static_cast<__ios_failure*>(*obj_ptr)->buf; 151*38fd1498Szrj return true; 152*38fd1498Szrj } 153*38fd1498Szrj // Otherwise proceed as normal to see if the handler matches. 154*38fd1498Szrj return __class_type_info::__do_upcast(dst_type, obj_ptr); 155*38fd1498Szrj } 156*38fd1498Szrj #else // ! __cpp_rtti 157*38fd1498Szrj using __ios_failure = ios::failure; 158*38fd1498Szrj #endif 159*38fd1498Szrj 160*38fd1498Szrj void __throw_ios_failure(const char * __s)161*38fd1498Szrj __throw_ios_failure(const char* __s __attribute__((unused))) 162*38fd1498Szrj { _GLIBCXX_THROW_OR_ABORT(__ios_failure(_(__s))); } 163*38fd1498Szrj 164*38fd1498Szrj _GLIBCXX_END_NAMESPACE_VERSION 165*38fd1498Szrj } // namespace 166