system_error

C语言库函数的原型,有用的拿去

// system_error standard header
#pragma once
#ifndef _SYSTEM_ERROR_
#define _SYSTEM_ERROR_
#ifndef RC_INVOKED
#include <cerrno>
#include <cstdlib>		// for strerror
#include <stdexcept>	// for runtime_error

 #pragma pack(push,_CRT_PACKING)
 #pragma warning(push,3)

 #if _HAS_CPP0X

 #else /* _HAS_CPP0X */
 #error C++0X not fully supported
 #endif /* _HAS_CPP0X */

_STD_BEGIN
		// ENUM errc
	namespace errc {
enum errc {	// names for generic error codes
	address_family_not_supported = EAFNOSUPPORT,
	address_in_use = EADDRINUSE,
	address_not_available = EADDRNOTAVAIL,
	already_connected = EISCONN,
	argument_list_too_long = E2BIG,
	argument_out_of_domain = EDOM,
	bad_address = EFAULT,
	bad_file_descriptor = EBADF,
	bad_message = EBADMSG,
	broken_pipe = EPIPE,
	connection_aborted = ECONNABORTED,
	connection_already_in_progress = EALREADY,
	connection_refused = ECONNREFUSED,
	connection_reset = ECONNRESET,
	cross_device_link = EXDEV,
	destination_address_required = EDESTADDRREQ,
	device_or_resource_busy = EBUSY,
	directory_not_empty = ENOTEMPTY,
	executable_format_error = ENOEXEC,
	file_exists = EEXIST,
	file_too_large = EFBIG,
	filename_too_long = ENAMETOOLONG,
	function_not_supported = ENOSYS,
	host_unreachable = EHOSTUNREACH,
	identifier_removed = EIDRM,
	illegal_byte_sequence = EILSEQ,
	inappropriate_io_control_operation = ENOTTY,
	interrupted = EINTR,
	invalid_argument = EINVAL,
	invalid_seek = ESPIPE,
	io_error = EIO,
	is_a_directory = EISDIR,
	message_size = EMSGSIZE,
	network_down = ENETDOWN,
	network_reset = ENETRESET,
	network_unreachable = ENETUNREACH,
	no_buffer_space = ENOBUFS,
	no_child_process = ECHILD,
	no_link = ENOLINK,
	no_lock_available = ENOLCK,
	no_message_available = ENODATA,
	no_message = ENOMSG,
	no_protocol_option = ENOPROTOOPT,
	no_space_on_device = ENOSPC,
	no_stream_resources = ENOSR,
	no_such_device_or_address = ENXIO,
	no_such_device = ENODEV,
	no_such_file_or_directory = ENOENT,
	no_such_process = ESRCH,
	not_a_directory = ENOTDIR,
	not_a_socket = ENOTSOCK,
	not_a_stream = ENOSTR,
	not_connected = ENOTCONN,
	not_enough_memory = ENOMEM,
	not_supported = ENOTSUP,
	operation_canceled = ECANCELED,
	operation_in_progress = EINPROGRESS,
	operation_not_permitted = EPERM,
	operation_not_supported = EOPNOTSUPP,
	operation_would_block = EWOULDBLOCK,
	owner_dead = EOWNERDEAD,
	permission_denied = EACCES,
	protocol_error = EPROTO,
	protocol_not_supported = EPROTONOSUPPORT,
	read_only_file_system = EROFS,
	resource_deadlock_would_occur = EDEADLK,
	resource_unavailable_try_again = EAGAIN,
	result_out_of_range = ERANGE,
	state_not_recoverable = ENOTRECOVERABLE,
	stream_timeout = ETIME,
	text_file_busy = ETXTBSY,
	timed_out = ETIMEDOUT,
	too_many_files_open_in_system = ENFILE,
	too_many_files_open = EMFILE,
	too_many_links = EMLINK,
	too_many_synbolic_link_levels = ELOOP,
	value_too_large = EOVERFLOW,
	wrong_protocol_type = EPROTOTYPE
	};
	}	// namespace errc

typedef errc::errc generic_errno;

		// TEMPLATE CLASS is_error_code_enum
template<class _Enum>
	struct is_error_code_enum
		: public tr1::false_type
	{	// tests for error_code enumeration
	};

		// TEMPLATE CLASS is_error_condition_enum
template<class _Enum>
	struct is_error_condition_enum
		: public tr1::false_type
	{	// tests for error_condition enumeration
	};

template<>
	struct is_error_condition_enum<generic_errno>
		: public tr1::true_type
	{	// tests for error_condition enumeration
	};

		// ENUM io_errc
	namespace io_errc {
enum io_errc {	// error codes for ios_base::failure
	stream = 1
	};
	}	// namespace pointer_safety

typedef io_errc::io_errc _Io_errc;

		// CLASS error_category
class error_code;
class error_condition;
class error_category;

_CRTIMP2_PURE const error_category& __CLRCALL_PURE_OR_CDECL generic_category();
_CRTIMP2_PURE const error_category& __CLRCALL_PURE_OR_CDECL iostream_category();
_CRTIMP2_PURE const error_category& __CLRCALL_PURE_OR_CDECL system_category();

class error_category
	{	// categorize an error
public:
	typedef int value_type;

	error_category()
		{	// default constructor
		}

	virtual ~error_category()
		{	// destroy the object
		}

	virtual const char *name() const = 0;

	virtual string message(value_type _Errval) const = 0;

	virtual error_condition default_error_condition(value_type _Errval) const;

	virtual bool equivalent(value_type _Errval,
		const error_condition& _Cond) const;

	virtual bool equivalent(const error_code& _Code,
		value_type _Errval) const;

	bool operator==(const error_category& _Right) const
		{	// compare categories for equality
		return (this == &_Right);
		}

	bool operator!=(const error_category& _Right) const
		{	// compare categeories for inequality
		return (!(*this == _Right));
		}

	bool operator<(const error_category& _Right) const
		{	// compare categories for order
		return (this < &_Right);
		}

private:
	error_category(const error_category&);	// not defined

	error_category& operator=(const error_category&);	// not defined
	};

		// CLASS error_code
class error_code
	{	// store an implementation-specific error code and category
public:
	typedef int value_type;

	error_code()
		: _Myval(0),
			_Mycat(&system_category())
		{	// construct non-error
		}

	error_code(value_type _Val, const error_category& _Cat)
		: _Myval(_Val), _Mycat(&_Cat)
		{	// construct from error code and category
		}

	template<class _Enum>
		error_code(_Enum _Errcode,
			typename tr1::enable_if<is_error_code_enum<_Enum>::value,
				error_code>::type * = 0)
		: _Myval(0), _Mycat(0)
		{	// construct from enumerated error code
		*this = make_error_code(_Errcode);	// using ADL
		}

	void assign(value_type _Val, const error_category& _Cat)
		{	// assign error code and category
		_Myval = _Val;
		_Mycat = &_Cat;
		}

	template<class _Enum>
		typename tr1::enable_if<is_error_code_enum<_Enum>::value,
			error_code>::type& operator=(_Enum _Errcode)
		{	// assign enumerated error code
		*this = make_error_code(_Errcode);	// using ADL
		return (*this);
		}

	void clear()
		{	// assign non-error
		_Myval = 0;
		_Mycat = &system_category();
		}

	value_type value() const
		{	// get error code
		return (_Myval);
		}

	const error_category& category() const
		{	// get category
		return (*_Mycat);
		}

	error_condition default_error_condition() const;

	string message() const
		{	// get name of error code
		return (category().message(value()));
		}

	_OPERATOR_BOOL() const
		{	// test for actual error
		return (value() != 0 ? _CONVERTIBLE_TO_TRUE : 0);
		}

	bool operator !() const
		{	// test for actual error
		return (value() == 0);
		}

	bool operator==(const error_code& _Right) const
		{	// test if *this == _Right
		return (category() == _Right.category()
			&& value() == _Right.value());
		}

	bool operator!=(const error_code& _Right) const
		{	// test if *this != _Right
		return (!(*this == _Right));
		}

	bool operator<(const error_code& _Right) const
		{	// test if *this == _Right
		return (category() < _Right.category()
			|| category() == _Right.category()
				&& value() < _Right.value());
		}

private:
	value_type _Myval;	// the stored error number
	const error_category *_Mycat;	// pointer to error category
	};

		// CLASS error_condition
class error_condition
	{	// store an abstract error code and category
public:
	typedef int value_type;

	error_condition()
		: _Myval(0),
			_Mycat(&generic_category())
		{	// construct non-error
		}

	error_condition(value_type _Val, const error_category& _Cat)
		: _Myval(_Val), _Mycat(&_Cat)
		{	// construct from error code and category
		}

	template<class _Enum>
		error_condition(_Enum _Errcode,
			typename tr1::enable_if<is_error_condition_enum<_Enum>::value,
				error_condition>::type * = 0)
		: _Myval(0), _Mycat(0)
		{	// construct from enumerated error code
		*this = make_error_condition(_Errcode);	// using ADL
		}

	void assign(value_type _Val, const error_category& _Cat)
		{	// assign error code and category
		_Myval = _Val;
		_Mycat = &_Cat;
		}

	template<class _Enum>
		typename tr1::enable_if<is_error_condition_enum<_Enum>::value,
			error_condition>::type& operator=(_Enum _Errcode)
		{	// assign enumerated error code
		*this = make_error_condition(_Errcode);	// using ADL
		return (*this);
		}

	void clear()
		{	// assign non-error
		_Myval = 0;
		_Mycat = &generic_category();
		}

	value_type value() const
		{	// get error code
		return (_Myval);
		}

	const error_category& category() const
		{	// get category
		return (*_Mycat);
		}

	string message() const
		{	// get name of error code
		return (category().message(value()));
		}

	_OPERATOR_BOOL() const
		{	// test for actual error
		return (value() != 0 ? _CONVERTIBLE_TO_TRUE : 0);
		}

	bool operator !() const
		{	// test for actual error
		return (value() == 0);
		}

	bool operator==(const error_condition& _Right) const
		{	// test if *this == _Right
		return (category() == _Right.category()
			&& value() == _Right.value());
		}

	bool operator!=(const error_condition& _Right) const
		{	// test if *this != _Right
		return (!(*this == _Right));
		}

	bool operator<(const error_condition& _Right) const
		{	// test if *this == _Right
		return (category() < _Right.category()
			|| category() == _Right.category()
				&& value() < _Right.value());
		}

private:
	value_type _Myval;	// the stored error number
	const error_category *_Mycat;	// pointer to error category
	};

		// VIRTUALS FOR error_category
inline error_condition
	error_category::default_error_condition(value_type _Errval) const
	{	// make error_condition for error code
	return (error_condition(_Errval, *this));
	}

inline bool
	error_category::equivalent(value_type _Errval,
		const error_condition& _Cond) const
	{	// test if error code same condition
	return (default_error_condition(_Errval) == _Cond);
	}

inline bool
	error_category::equivalent(const error_code& _Code,
		value_type _Errval) const
	{	// test if conditions same for this category
	return (*this == _Code.category() && _Code.value() == _Errval);
	}

		// MEMBER FUNCTIONS for error_code
inline error_condition error_code::default_error_condition() const
	{	// make error_condition for error code
	return (category().default_error_condition(value()));
	}

		// OPERATOR== FOR error_code/error_condition
inline bool operator==(
	const error_code& _Left,
	const error_condition& _Right)
	{	// test errors for equality
	return (_Left.category().equivalent(_Left.value(), _Right)
		|| _Right.category().equivalent(_Left, _Right.value()));
	}

inline bool operator==(
	const error_condition& _Left,
	const error_code& _Right)
	{	// test errors for equality
	return (_Right.category().equivalent(_Right.value(), _Left)
		|| _Left.category().equivalent(_Right, _Left.value()));
	}

		// OPERATOR!= FOR error_code/error_condition
inline bool operator!=(
	const error_code& _Left,
	const error_condition& _Right)
	{	// test errors for inequality
	return (!(_Left == _Right));
	}

inline bool operator!=(
	const error_condition& _Left,
	const error_code& _Right)
	{	// test errors for inequality
	return (!(_Left == _Right));
	}

		// FUNCTION make_error_code
inline error_code make_error_code(generic_errno _Errno)
	{	// make an error_code
	return (error_code(_Errno, generic_category()));
	}

inline error_code make_error_code(_Io_errc _Errno)
	{	// make an error_code
	return (error_code(_Errno, iostream_category()));
	}

		// FUNCTION make_error_condition
inline error_condition make_error_condition(generic_errno _Errno)
	{	// make an error_condition
	return (error_condition(_Errno, generic_category()));
	}

inline error_condition make_error_condition(_Io_errc _Errno)
	{	// make an error_condition
	return (error_condition(_Errno, iostream_category()));
	}

		// CLASS hash
template<class _Kty>
	class hash;

template<>
	class hash<_STD error_code>
		: public unary_function<error_code, size_t>
	{	// hash functor
public:
	typedef _STD error_code _Kty;

	size_t operator()(const _Kty& _Keyval) const
		{	// hash _Keyval to size_t value by pseudorandomizing transform
		ldiv_t _Qrem = _CSTD ldiv((long)(size_t)_Keyval.value(), 127773);

		_Qrem.rem = 16807 * _Qrem.rem - 2836 * _Qrem.quot;
		if (_Qrem.rem < 0)
			_Qrem.rem += 2147483647;
		return ((size_t)_Qrem.rem);
		}
	};

template<>
	class hash<_STD error_condition>
		: public unary_function<error_condition, size_t>
	{	// hash functor
public:
	typedef _STD error_condition _Kty;

	size_t operator()(const _Kty& _Keyval) const
		{	// hash _Keyval to size_t value by pseudorandomizing transform
		ldiv_t _Qrem = _CSTD ldiv((long)(size_t)_Keyval.value(), 127773);

		_Qrem.rem = 16807 * _Qrem.rem - 2836 * _Qrem.quot;
		if (_Qrem.rem < 0)
			_Qrem.rem += 2147483647;
		return ((size_t)_Qrem.rem);
		}
	};

		// CLASS system_error
class system_error
	: public runtime_error
	{	// base of all system-error exceptions
public:
	explicit system_error(error_code _Errcode,
		const string& _Message = "")
		: runtime_error(_Message), _Mycode(_Errcode)
		{	// construct from error code and message string
		_Makestr();
		}

	system_error(error_code _Errcode,
		const char *_Message)
		: runtime_error(_Message), _Mycode(_Errcode)
		{	// construct from error code and message string
		_Makestr();
		}

	system_error(error_code::value_type _Errval,
		const error_category& _Errcat,
		const string& _Message = "")
		: runtime_error(_Message), _Mycode(_Errval, _Errcat)
		{	// construct from error code components and message string
		_Makestr();
		}

	system_error(error_code::value_type _Errval,
		const error_category& _Errcat,
		const char *_Message)
		: runtime_error(_Message), _Mycode(_Errval, _Errcat)
		{	// construct from error code components and message string
		_Makestr();
		}

//	virtual ~system_error() _THROW0()
//		{	// destroy the object
//		}

//	virtual const char *what() const _THROW0()
//		{	// return pointer to message string
//		return (_Mymes.c_str());
//		}

	const error_code& code() const _THROW0()
		{	// return stored error code
		return (_Mycode);
		}

 #if _HAS_EXCEPTIONS

 #else /* _HAS_EXCEPTIONS */
protected:
	virtual void _Doraise() const
		{	// perform class-specific exception handling
		_RAISE(*this);
		}
 #endif /* _HAS_EXCEPTIONS */

private:
	void _Makestr()
		{	// compose error message
//		_Mymes = this->runtime_error::what();
//		if (!_Mymes.empty())
//			_Mymes.append(": ");
//		_Mymes.append(_Mycode.message());
		}

	error_code _Mycode;	// the stored error code
//	string _Mymes;		// the stored error message
	};
_STD_END
 #pragma warning(pop)
 #pragma pack(pop)

#endif /* RC_INVOKED */
#endif /* _SYSTEM_ERROR_ */

/*
 * Copyright (c) 1992-2009 by P.J. Plauger.  ALL RIGHTS RESERVED.
 * Consult your license regarding permissions and restrictions.
V5.20:0009 */