// <system_error> implementation file
// Copyright (C) 2007-2015 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
#define _GLIBCXX_USE_CXX11_ABI 1
#define __sso_string __sso_stringxxx
#include <cstring>
#include <system_error>
#include <bits/functexcept.h>
#include <limits>
#undef __sso_string
namespace
{
using std::string;
struct generic_error_category : public std::error_category
{
virtual const char*
name() const noexcept
{ return "generic"; }
_GLIBCXX_DEFAULT_ABI_TAG
virtual string
message(int i) const
{
// XXX locale issues: how does one get or set loc.
// _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
return string(strerror(i));
}
};
struct system_error_category : public std::error_category
{
virtual const char*
name() const noexcept
{ return "system"; }
_GLIBCXX_DEFAULT_ABI_TAG
virtual string
message(int i) const
{
// XXX locale issues: how does one get or set loc.
// _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
return string(strerror(i));
}
};
const generic_error_category generic_category_instance{};
const system_error_category system_category_instance{};
}
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
error_category::~error_category() noexcept = default;
const error_category&
_V2::system_category() noexcept { return system_category_instance; }
const error_category&
_V2::generic_category() noexcept { return generic_category_instance; }
system_error::~system_error() noexcept = default;
error_condition
error_category::default_error_condition(int __i) const noexcept
{ return error_condition(__i, *this); }
bool
error_category::equivalent(int __i,
const error_condition& __cond) const noexcept
{ return default_error_condition(__i) == __cond; }
bool
error_category::equivalent(const error_code& __code, int __i) const noexcept
{ return *this == __code.category() && __code.value() == __i; }
error_condition
error_code::default_error_condition() const noexcept
{ return category().default_error_condition(value()); }
#if _GLIBCXX_USE_CXX11_ABI
// Return error_category::message() as a COW string
__cow_string
error_category::_M_message(int i) const
{
string msg = this->message(i);
return {msg.c_str(), msg.length()};
}
#endif
#if _GLIBCXX_USE_DUAL_ABI
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wabi-tag"
// Redefine __sso_string so that we can define and export its members
// in terms of the SSO std::string.
struct __sso_string
{
struct __str
{
const char* _M_p;
size_t _M_string_length;
char _M_local_buf[16];
};
union {
__str _M_s;
char _M_bytes[sizeof(_M_s)];
std::string _M_str;
};
__sso_string();
__sso_string(const std::string& s);
__sso_string(const char*, size_t n);
__sso_string(const __sso_string&) noexcept;
__sso_string& operator=(const __sso_string&) noexcept;
~__sso_string();
__sso_string(__sso_string&&) noexcept;
__sso_string& operator=(__sso_string&&) noexcept;
};
#pragma GCC diagnostic pop
__sso_string::__sso_string() : _M_str() { }
#if _GLIBCXX_USE_CXX11_ABI
static_assert(sizeof(__sso_string) == sizeof(std::string),
"sizeof(std::string) has changed");
static_assert(alignof(__sso_string) == alignof(std::string),
"alignof(std::string) has changed");
// This constructor is defined in src/c++11/cow-stdexcept.cc for COW strings
__sso_string::__sso_string(const std::string& s) : _M_str(s) { }
#endif
__sso_string::__sso_string(const char* s, size_t n) : _M_str(s, n) { }
__sso_string::__sso_string(const __sso_string& s) noexcept
: _M_str(s._M_str) { }
__sso_string&
__sso_string::operator=(const __sso_string& s) noexcept
{
_M_str = s._M_str;
return *this;
}
__sso_string::~__sso_string() { _M_str.~basic_string(); }
__sso_string::__sso_string(__sso_string&& s) noexcept
: _M_str(std::move(s._M_str)) { }
__sso_string&
__sso_string::operator=(__sso_string&& s) noexcept
{
_M_str = std::move(s._M_str);
return *this;
}
#endif // _GLIBCXX_USE_DUAL_ABI
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace