Update gcc-50 to SVN version 221572
[dragonfly.git] / contrib / gcc-5.0 / libstdc++-v3 / src / c++11 / system_error.cc
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1// <system_error> implementation file
2
3// Copyright (C) 2007-2015 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
34namespace
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
38c0c85b 44 _GLIBCXX_DEFAULT_ABI_TAG
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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
38c0c85b 60 _GLIBCXX_DEFAULT_ABI_TAG
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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
74namespace std _GLIBCXX_VISIBILITY(default)
75{
76_GLIBCXX_BEGIN_NAMESPACE_VERSION
77
78 error_category::~error_category() noexcept = default;
79
80 const error_category&
81 _V2::system_category() noexcept { return system_category_instance; }
82
83 const error_category&
84 _V2::generic_category() noexcept { return generic_category_instance; }
85
86 system_error::~system_error() noexcept = default;
87
88 error_condition
89 error_category::default_error_condition(int __i) const noexcept
90 { return error_condition(__i, *this); }
91
92 bool
93 error_category::equivalent(int __i,
94 const error_condition& __cond) const noexcept
95 { return default_error_condition(__i) == __cond; }
96
97 bool
98 error_category::equivalent(const error_code& __code, int __i) const noexcept
99 { return *this == __code.category() && __code.value() == __i; }
100
101 error_condition
102 error_code::default_error_condition() const noexcept
103 { return category().default_error_condition(value()); }
104
105#if _GLIBCXX_USE_CXX11_ABI
106 // Return error_category::message() as a COW string
107 __cow_string
108 error_category::_M_message(int i) const
109 {
110 string msg = this->message(i);
111 return {msg.c_str(), msg.length()};
112 }
113#endif
114
115#if _GLIBCXX_USE_DUAL_ABI
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116#pragma GCC diagnostic push
117#pragma GCC diagnostic ignored "-Wabi-tag"
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118 // Redefine __sso_string so that we can define and export its members
119 // in terms of the SSO std::string.
120 struct __sso_string
121 {
122 struct __str
123 {
124 const char* _M_p;
125 size_t _M_string_length;
126 char _M_local_buf[16];
127 };
128
129 union {
130 __str _M_s;
131 char _M_bytes[sizeof(_M_s)];
132 std::string _M_str;
133 };
134
135 __sso_string();
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;
140 ~__sso_string();
141 __sso_string(__sso_string&&) noexcept;
142 __sso_string& operator=(__sso_string&&) noexcept;
143 };
38c0c85b 144#pragma GCC diagnostic pop
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145
146 __sso_string::__sso_string() : _M_str() { }
147
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");
153
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) { }
156#endif
157
158 __sso_string::__sso_string(const char* s, size_t n) : _M_str(s, n) { }
159
160 __sso_string::__sso_string(const __sso_string& s) noexcept
161 : _M_str(s._M_str) { }
162
163 __sso_string&
164 __sso_string::operator=(const __sso_string& s) noexcept
165 {
166 _M_str = s._M_str;
167 return *this;
168 }
169
170 __sso_string::~__sso_string() { _M_str.~basic_string(); }
171
172 __sso_string::__sso_string(__sso_string&& s) noexcept
173 : _M_str(std::move(s._M_str)) { }
174
175 __sso_string&
176 __sso_string::operator=(__sso_string&& s) noexcept
177 {
178 _M_str = std::move(s._M_str);
179 return *this;
180 }
181#endif // _GLIBCXX_USE_DUAL_ABI
182
183_GLIBCXX_END_NAMESPACE_VERSION
184} // namespace