1 // <system_error> implementation file
3 // Copyright (C) 2007-2015 Free Software Foundation, Inc.
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)
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.
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.
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/>.
26 #define _GLIBCXX_USE_CXX11_ABI 1
27 #define __sso_string __sso_stringxxx
29 #include <system_error>
30 #include <bits/functexcept.h>
38 struct generic_error_category : public std::error_category
44 _GLIBCXX_DEFAULT_ABI_TAG
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));
54 struct system_error_category : public std::error_category
60 _GLIBCXX_DEFAULT_ABI_TAG
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));
70 const generic_error_category generic_category_instance{};
71 const system_error_category system_category_instance{};
74 namespace std _GLIBCXX_VISIBILITY(default)
76 _GLIBCXX_BEGIN_NAMESPACE_VERSION
78 error_category::~error_category() noexcept = default;
81 _V2::system_category() noexcept { return system_category_instance; }
84 _V2::generic_category() noexcept { return generic_category_instance; }
86 system_error::~system_error() noexcept = default;
89 error_category::default_error_condition(int __i) const noexcept
90 { return error_condition(__i, *this); }
93 error_category::equivalent(int __i,
94 const error_condition& __cond) const noexcept
95 { return default_error_condition(__i) == __cond; }
98 error_category::equivalent(const error_code& __code, int __i) const noexcept
99 { return *this == __code.category() && __code.value() == __i; }
102 error_code::default_error_condition() const noexcept
103 { return category().default_error_condition(value()); }
105 #if _GLIBCXX_USE_CXX11_ABI
106 // Return error_category::message() as a COW string
108 error_category::_M_message(int i) const
110 string msg = this->message(i);
111 return {msg.c_str(), msg.length()};
115 #if _GLIBCXX_USE_DUAL_ABI
116 #pragma GCC diagnostic push
117 #pragma GCC diagnostic ignored "-Wabi-tag"
118 // Redefine __sso_string so that we can define and export its members
119 // in terms of the SSO std::string.
125 size_t _M_string_length;
126 char _M_local_buf[16];
131 char _M_bytes[sizeof(_M_s)];
136 __sso_string(const std::string& s);
137 __sso_string(const char*, size_t n);
138 __sso_string(const __sso_string&) noexcept;
139 __sso_string& operator=(const __sso_string&) noexcept;
141 __sso_string(__sso_string&&) noexcept;
142 __sso_string& operator=(__sso_string&&) noexcept;
144 #pragma GCC diagnostic pop
146 __sso_string::__sso_string() : _M_str() { }
148 #if _GLIBCXX_USE_CXX11_ABI
149 static_assert(sizeof(__sso_string) == sizeof(std::string),
150 "sizeof(std::string) has changed");
151 static_assert(alignof(__sso_string) == alignof(std::string),
152 "alignof(std::string) has changed");
154 // This constructor is defined in src/c++11/cow-stdexcept.cc for COW strings
155 __sso_string::__sso_string(const std::string& s) : _M_str(s) { }
158 __sso_string::__sso_string(const char* s, size_t n) : _M_str(s, n) { }
160 __sso_string::__sso_string(const __sso_string& s) noexcept
161 : _M_str(s._M_str) { }
164 __sso_string::operator=(const __sso_string& s) noexcept
170 __sso_string::~__sso_string() { _M_str.~basic_string(); }
172 __sso_string::__sso_string(__sso_string&& s) noexcept
173 : _M_str(std::move(s._M_str)) { }
176 __sso_string::operator=(__sso_string&& s) noexcept
178 _M_str = std::move(s._M_str);
181 #endif // _GLIBCXX_USE_DUAL_ABI
183 _GLIBCXX_END_NAMESPACE_VERSION