1 // <system_error> implementation file 2 3 // Copyright (C) 2007-2018 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 #define _GLIBCXX_USE_CXX11_ABI 1 27 #define __sso_string __sso_stringxxx 28 #include <cstring> 29 #include <system_error> 30 #include <bits/functexcept.h> 31 #include <limits> 32 #undef __sso_string 33 34 namespace 35 { 36 using std::string; 37 38 struct generic_error_category : public std::error_category 39 { 40 virtual const char* 41 name() const noexcept 42 { return "generic"; } 43 44 _GLIBCXX_DEFAULT_ABI_TAG 45 virtual string 46 message(int i) const 47 { 48 // XXX locale issues: how does one get or set loc. 49 // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc) 50 return string(strerror(i)); 51 } 52 }; 53 54 struct system_error_category : public std::error_category 55 { 56 virtual const char* 57 name() const noexcept 58 { return "system"; } 59 60 _GLIBCXX_DEFAULT_ABI_TAG 61 virtual string 62 message(int i) const 63 { 64 // XXX locale issues: how does one get or set loc. 65 // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc) 66 return string(strerror(i)); 67 } 68 }; 69 70 const generic_error_category generic_category_instance{}; 71 const system_error_category system_category_instance{}; 72 } 73 74 namespace std _GLIBCXX_VISIBILITY(default) 75 { 76 _GLIBCXX_BEGIN_NAMESPACE_VERSION 77 78 void 79 __throw_system_error(int __i __attribute__((unused))) 80 { 81 _GLIBCXX_THROW_OR_ABORT(system_error(error_code(__i, generic_category()))); 82 } 83 84 error_category::~error_category() noexcept = default; 85 86 const error_category& 87 _V2::system_category() noexcept { return system_category_instance; } 88 89 const error_category& 90 _V2::generic_category() noexcept { return generic_category_instance; } 91 92 system_error::~system_error() noexcept = default; 93 94 error_condition 95 error_category::default_error_condition(int __i) const noexcept 96 { return error_condition(__i, *this); } 97 98 bool 99 error_category::equivalent(int __i, 100 const error_condition& __cond) const noexcept 101 { return default_error_condition(__i) == __cond; } 102 103 bool 104 error_category::equivalent(const error_code& __code, int __i) const noexcept 105 { return *this == __code.category() && __code.value() == __i; } 106 107 error_condition 108 error_code::default_error_condition() const noexcept 109 { return category().default_error_condition(value()); } 110 111 #if _GLIBCXX_USE_CXX11_ABI 112 // Return error_category::message() as a COW string 113 __cow_string 114 error_category::_M_message(int i) const 115 { 116 string msg = this->message(i); 117 return {msg.c_str(), msg.length()}; 118 } 119 #endif 120 121 _GLIBCXX_END_NAMESPACE_VERSION 122 } // namespace 123