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d0ff4e64 | 1 | // <system_error> implementation file |
2 | ||
f1717362 | 3 | // Copyright (C) 2007-2016 Free Software Foundation, Inc. |
d0ff4e64 | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
d0ff4e64 | 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 | ||
6bc9506f | 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/>. | |
d0ff4e64 | 24 | |
d0ff4e64 | 25 | |
63f54259 | 26 | #define _GLIBCXX_USE_CXX11_ABI 1 |
27 | #define __sso_string __sso_stringxxx | |
d0ff4e64 | 28 | #include <cstring> |
29 | #include <system_error> | |
30 | #include <bits/functexcept.h> | |
31 | #include <limits> | |
63f54259 | 32 | #undef __sso_string |
d0ff4e64 | 33 | |
34 | namespace | |
35 | { | |
9539daa0 | 36 | using std::string; |
a5196aae | 37 | |
38 | struct generic_error_category : public std::error_category | |
d0ff4e64 | 39 | { |
9539daa0 | 40 | virtual const char* |
809a787a | 41 | name() const noexcept |
a5196aae | 42 | { return "generic"; } |
d0ff4e64 | 43 | |
29898472 | 44 | _GLIBCXX_DEFAULT_ABI_TAG |
9539daa0 | 45 | virtual string |
46 | message(int i) const | |
d0ff4e64 | 47 | { |
9539daa0 | 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)); | |
d0ff4e64 | 51 | } |
52 | }; | |
53 | ||
a5196aae | 54 | struct system_error_category : public std::error_category |
55 | { | |
56 | virtual const char* | |
809a787a | 57 | name() const noexcept |
a5196aae | 58 | { return "system"; } |
d0ff4e64 | 59 | |
29898472 | 60 | _GLIBCXX_DEFAULT_ABI_TAG |
a5196aae | 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 | }; | |
d0ff4e64 | 69 | |
01a53173 | 70 | const generic_error_category generic_category_instance{}; |
71 | const system_error_category system_category_instance{}; | |
a5196aae | 72 | } |
9539daa0 | 73 | |
2948dd21 | 74 | namespace std _GLIBCXX_VISIBILITY(default) |
75 | { | |
76 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
d0ff4e64 | 77 | |
809a787a | 78 | error_category::~error_category() noexcept = default; |
c3007d7f | 79 | |
c47f0e87 | 80 | const error_category& |
63f54259 | 81 | _V2::system_category() noexcept { return system_category_instance; } |
c47f0e87 | 82 | |
83 | const error_category& | |
63f54259 | 84 | _V2::generic_category() noexcept { return generic_category_instance; } |
a5196aae | 85 | |
809a787a | 86 | system_error::~system_error() noexcept = default; |
d0ff4e64 | 87 | |
9539daa0 | 88 | error_condition |
809a787a | 89 | error_category::default_error_condition(int __i) const noexcept |
9539daa0 | 90 | { return error_condition(__i, *this); } |
91 | ||
92 | bool | |
809a787a | 93 | error_category::equivalent(int __i, |
94 | const error_condition& __cond) const noexcept | |
9539daa0 | 95 | { return default_error_condition(__i) == __cond; } |
96 | ||
97 | bool | |
809a787a | 98 | error_category::equivalent(const error_code& __code, int __i) const noexcept |
9539daa0 | 99 | { return *this == __code.category() && __code.value() == __i; } |
100 | ||
101 | error_condition | |
809a787a | 102 | error_code::default_error_condition() const noexcept |
9539daa0 | 103 | { return category().default_error_condition(value()); } |
104 | ||
63f54259 | 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 | |
29898472 | 116 | #pragma GCC diagnostic push |
117 | #pragma GCC diagnostic ignored "-Wabi-tag" | |
63f54259 | 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 | }; | |
29898472 | 144 | #pragma GCC diagnostic pop |
63f54259 | 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 | ||
2948dd21 | 183 | _GLIBCXX_END_NAMESPACE_VERSION |
184 | } // namespace |