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|
//===---------------------- system_error.cpp ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define _LIBCPP_BUILDING_SYSTEM_ERROR
#include "system_error"
#include "string"
#include "cstring"
_LIBCPP_BEGIN_NAMESPACE_STD
// class error_category
error_category::error_category() _NOEXCEPT
{
}
error_category::~error_category() _NOEXCEPT
{
}
error_condition
error_category::default_error_condition(int ev) const _NOEXCEPT
{
return error_condition(ev, *this);
}
bool
error_category::equivalent(int code, const error_condition& condition) const _NOEXCEPT
{
return default_error_condition(code) == condition;
}
bool
error_category::equivalent(const error_code& code, int condition) const _NOEXCEPT
{
return *this == code.category() && code.value() == condition;
}
string
__do_message::message(int ev) const
{
return string(strerror(ev));
}
class _LIBCPP_HIDDEN __generic_error_category
: public __do_message
{
public:
virtual const char* name() const _NOEXCEPT;
virtual string message(int ev) const;
};
const char*
__generic_error_category::name() const _NOEXCEPT
{
return "generic";
}
string
__generic_error_category::message(int ev) const
{
#ifdef ELAST
if (ev > ELAST)
return string("unspecified generic_category error");
#endif // ELAST
return __do_message::message(ev);
}
const error_category&
generic_category() _NOEXCEPT
{
static __generic_error_category s;
return s;
}
class _LIBCPP_HIDDEN __system_error_category
: public __do_message
{
public:
virtual const char* name() const _NOEXCEPT;
virtual string message(int ev) const;
virtual error_condition default_error_condition(int ev) const _NOEXCEPT;
};
const char*
__system_error_category::name() const _NOEXCEPT
{
return "system";
}
string
__system_error_category::message(int ev) const
{
#ifdef ELAST
if (ev > ELAST)
return string("unspecified system_category error");
#endif // ELAST
return __do_message::message(ev);
}
error_condition
__system_error_category::default_error_condition(int ev) const _NOEXCEPT
{
#ifdef ELAST
if (ev > ELAST)
return error_condition(ev, system_category());
#endif // ELAST
return error_condition(ev, generic_category());
}
const error_category&
system_category() _NOEXCEPT
{
static __system_error_category s;
return s;
}
// error_condition
string
error_condition::message() const
{
return __cat_->message(__val_);
}
// error_code
string
error_code::message() const
{
return __cat_->message(__val_);
}
// system_error
string
system_error::__init(const error_code& ec, string what_arg)
{
if (ec)
{
if (!what_arg.empty())
what_arg += ": ";
what_arg += ec.message();
}
return _VSTD::move(what_arg);
}
system_error::system_error(error_code ec, const string& what_arg)
: runtime_error(__init(ec, what_arg)),
__ec_(ec)
{
}
system_error::system_error(error_code ec, const char* what_arg)
: runtime_error(__init(ec, what_arg)),
__ec_(ec)
{
}
system_error::system_error(error_code ec)
: runtime_error(__init(ec, "")),
__ec_(ec)
{
}
system_error::system_error(int ev, const error_category& ecat, const string& what_arg)
: runtime_error(__init(error_code(ev, ecat), what_arg)),
__ec_(error_code(ev, ecat))
{
}
system_error::system_error(int ev, const error_category& ecat, const char* what_arg)
: runtime_error(__init(error_code(ev, ecat), what_arg)),
__ec_(error_code(ev, ecat))
{
}
system_error::system_error(int ev, const error_category& ecat)
: runtime_error(__init(error_code(ev, ecat), "")),
__ec_(error_code(ev, ecat))
{
}
system_error::~system_error() _NOEXCEPT
{
}
void
__throw_system_error(int ev, const char* what_arg)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw system_error(error_code(ev, system_category()), what_arg);
#else
(void)ev;
(void)what_arg;
#endif
}
_LIBCPP_END_NAMESPACE_STD
|
