xloctime

C语言库函数的原型,有用的拿去

 #if _HAS_CPP0X
	virtual _InIt __CLR_OR_THIS_CALL do_get(_InIt _First, _InIt _Last,
		ios_base& _Iosbase, ios_base::iostate& _State, tm *_Pt,
		char _Specifier, char = 0) const
		{	// get formatted time for _Specifier (_Modifier ignored)
		int _Ans = 0;

		switch (_Specifier)
			{	// process format specifier
		case 'a':
		case 'A':
			_First = get_weekday(_First, _Last, _Iosbase, _State, _Pt);
			break;

		case 'b':
		case 'B':
		case 'h':
			_First = get_monthname(_First, _Last, _Iosbase, _State, _Pt);
			break;

		case 'c':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%b %d %H : %M : %S %Y");
			break;

		case 'C':
			_State |= _Getint(_First, _Last, 0, 99, _Ans);
			if (!(_State & ios_base::failbit))
				_Pt->tm_year = _Ans * 100 - 1900;	// convert to century
			break;

		case 'd':
		case 'e':
			_State |= _Getint(_First, _Last, 1, 31, _Pt->tm_mday);
			break;

		case 'D':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%m / %d / %y");
			break;

		case 'H':
			_State |= _Getint(_First, _Last, 0, 23, _Pt->tm_hour);
			break;

		case 'I':
			_State |= _Getint(_First, _Last, 0, 11, _Pt->tm_hour);
			break;

		case 'j':
			_State |= _Getint(_First, _Last, 1, 366, _Pt->tm_yday);
			break;

		case 'm':
			_State |= _Getint(_First, _Last, 1, 12, _Ans);
			if (!(_State & ios_base::failbit))
				_Pt->tm_mon = _Ans - 1;
			break;

		case 'M':
			_State |= _Getint(_First, _Last, 0, 59, _Pt->tm_min);
			break;

		case 'n':
		case 't':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				" ");
			break;

		case 'p':
			_Ans = _Getloctxt(_First, _Last, (size_t)0, ":AM:am:PM:pm");
			if (_Ans < 0)
				_State |= ios_base::failbit;
			else
				_Pt->tm_hour += _Ans * 12;
			break;

		case 'r':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%I : %M : %S %p");
			break;

		case 'R':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%H : %M");
			break;

		case 'S':
			_State |= _Getint(_First, _Last, 0, 59, _Pt->tm_sec);
			break;

		case 'T':
		case 'X':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%H : %M : S");
			break;

		case 'U':
			_State |= _Getint(_First, _Last, 0, 53, _Pt->tm_yday);
			break;

		case 'w':
			_State |= _Getint(_First, _Last, 0, 6, _Pt->tm_wday);
			break;

		case 'W':
			_State |= _Getint(_First, _Last, 0, 53, _Pt->tm_yday);
			break;

		case 'x':
			_First = _Getfmt(_First, _Last, _Iosbase, _State, _Pt,
				"%d / %m / %y");
			break;

		case 'y':
			_State |= _Getint(_First, _Last, 0, 99, _Ans);
			if (!(_State & ios_base::failbit))
				_Pt->tm_year = _Ans < 69 ? _Ans + 100 : _Ans;
			break;

		case 'Y':
			_First = get_year(_First, _Last, _Iosbase, _State, _Pt);
			break;

		default:
			_State |= ios_base::failbit;	// unknown specifier
			}

		if (_First == _Last)
			_State |= ios_base::eofbit;
		return (_First);
		}

	_InIt __CLR_OR_THIS_CALL _Getfmt(_InIt _First, _InIt _Last,
		ios_base& _Iosbase, ios_base::iostate& _State, tm *_Pt,
			const char *_Fmtfirst) const
		{	// get formatted time for format NTBS
		typedef ctype<_Elem> _Ctype;
		const _Ctype& _Ctype_fac = _USE(_Iosbase.getloc(), _Ctype);

		for (; *_Fmtfirst != '\0'; ++_Fmtfirst)
			if (*_Fmtfirst == '%')
				_First = do_get(_First, _Last, _Iosbase, _State, _Pt,
					*++_Fmtfirst);	// convert a single field
			else if (*_Fmtfirst == ' ')
				for (; _First != _Last
					&& _Ctype_fac.is(_Ctype::space, *_First); ++_First)
					;
			else if (*_First != _MAKLOCCHR(_Elem, *_Fmtfirst, _Cvt))
				{	// bad literal match
				_State |= ios_base::failbit;
				break;
				}
			else
				++_First;
		if (_First == _Last)
			_State |= ios_base::eofbit;
		return (_First);
		}
 #endif /* _HAS_CPP0X */

private:
	ios_base::iostate __CLRCALL_OR_CDECL _Getint(
		_InIt& _First, _InIt& _Last,
		int _Lo, int _Hi, int& _Val) const
		{	// get integer in range [_Lo, _Hi] from [_First, _Last)
		const _Elem _E0 = _MAKLOCCHR(_Elem, '0', _Cvt);
		char _Ac[_MAX_INT_DIG], *_Ep;
		char *_Ptr = _Ac;

		if (_First == _Last)
			;
		else if (*_First == _MAKLOCCHR(_Elem, '+', _Cvt))
			*_Ptr++ = '+', ++_First;	// copy plus sign
		else if (*_First == _MAKLOCCHR(_Elem, '-', _Cvt))
			*_Ptr++ = '-', ++_First;	// copy minus sign

		bool _Seendigit = false;
		while (_First != _Last && *_First == _E0)
			_Seendigit = true, ++_First;	// strip leading zeros
		if (_Seendigit)
			*_Ptr++ = '0';	// replace one or more with single zero

		for (char *const _Pe = &_Ac[_MAX_INT_DIG - 1]; _First != _Last
			&& _E0 <= *_First && *_First <= _E0 + 9;
			_Seendigit = true, ++_First)
			{	// copy digits
			*_Ptr = (char)((*_First - _E0) + '0');
			if (_Ptr < _Pe)
				++_Ptr;	// drop trailing digits if already too large
			}

		if (!_Seendigit)
			_Ptr = _Ac;
		*_Ptr = '\0';
		int _Errno = 0;
		const long _Ans = _CSTD _Stolx(_Ac, &_Ep, 10, &_Errno);
		ios_base::iostate _State = ios_base::goodbit;

		if (_First == _Last)
			_State |= ios_base::eofbit;
		if (_Ep == _Ac || _Errno != 0 || _Ans < _Lo || _Hi < _Ans)
			_State |= ios_base::failbit;	// bad conversion
		else
			_Val = _Ans;	// store valid result
		return (_State);
		}

	void __CLR_OR_THIS_CALL _Tidy()
		{	// free all storage
		_DELETE_CRT_VEC((void *)_Days);
		_DELETE_CRT_VEC((void *)_Months);
		}

	const _Elem *_Days;	// ":Sun:Sunday:Mon:Monday..." for example
	const _Elem *_Months;	// "Jan:January:Feb:February..." for example
	dateorder _Dateorder;
	_Locinfo::_Cvtvec _Cvt;		// conversion information
	};

		// STATIC time_get::id OBJECT
template<class _Elem,
	class _InIt>
	__PURE_APPDOMAIN_GLOBAL locale::id time_get<_Elem, _InIt>::id;

		// TEMPLATE CLASS time_get_byname
template<class _Elem,
	class _InIt = istreambuf_iterator<_Elem, char_traits<_Elem> > >
	class time_get_byname
		: public time_get<_Elem, _InIt>
	{	// time_get for named locale
public:
	explicit time_get_byname(const char *_Locname, size_t _Refs = 0)
		: time_get<_Elem, _InIt>(_Locname, _Refs)
		{	// construct for named locale
		}

 #if _HAS_CPP0X
	explicit time_get_byname(const string& _Str, size_t _Refs = 0)
		: time_get<_Elem, _InIt>(_Locinfo(_Str.c_str()), _Refs)
		{	// construct for named locale
		}
 #endif /* _HAS_CPP0X */

protected:
	virtual __CLR_OR_THIS_CALL ~time_get_byname()
		{	// destroy the object
		}
	};

		// TEMPLATE CLASS time_put
template<class _Elem,
	class _OutIt = ostreambuf_iterator<_Elem, char_traits<_Elem> > >
	class time_put
		: public locale::facet
	{	// facet for converting encoded times to text
public:
	typedef _Elem char_type;
	typedef _OutIt iter_type;

	_OutIt __CLR_OR_THIS_CALL put(_OutIt _Dest,
		ios_base& _Iosbase, _Elem _Fill, const tm *_Pt,
			const _Elem *_Fmtfirst, const _Elem *_Fmtlast) const
		{	// put formatted time from _Pt to _Dest for [_Fmtfirst, _Fmtlast)
		_DEBUG_POINTER(_Dest);
		_DEBUG_POINTER(_Pt);
		const _Elem _Percent = _MAKLOCCHR(_Elem, '%', _Cvt);

		for (; _Fmtfirst != _Fmtlast; ++_Fmtfirst)
			if (*_Fmtfirst != _Percent)
				*_Dest++ = *_Fmtfirst;	// copy literal element
			else if (++_Fmtfirst == _Fmtlast)
				{	// treat trailing % as %%
				*_Dest++ = _Percent;
				break;
				}
			else
				{	// get specifier after %
				char _Specifier = _MAKLOCBYTE(_Elem, *_Fmtfirst, _Cvt);
				char _Qualifier = '\0';

				if (_Specifier != 'E' && _Specifier != 'O'
					&& _Specifier != 'Q' && _Specifier != '#')
					;	// not [E0Q#] qualifier, treat as specifier
				else if (++_Fmtfirst == _Fmtlast)
					{	// no specifier, copy %[E0Q#] as literal elements
					*_Dest++ = _Percent, *_Dest++ = _Specifier;
					break;
					}
				else
					{	// save both qualifier and specifier
					_Qualifier = _Specifier;
					_Specifier = _MAKLOCBYTE(_Elem, *_Fmtfirst, _Cvt);
					}

				_Dest = do_put(_Dest, _Iosbase, _Fill, _Pt,
					_Specifier, _Qualifier);	// convert a single field
				}
		return (_Dest);
		}

	_OutIt __CLR_OR_THIS_CALL put(_OutIt _Dest,
		ios_base& _Iosbase, _Elem _Fill, const tm *_Pt,
		char _Specifier, char _Modifier = 0) const
		{	// put formatted time from _Pt to _Dest for _Specifier/_Modifier
		return (do_put(_Dest, _Iosbase, _Fill, _Pt, _Specifier, _Modifier));
		}

	__PURE_APPDOMAIN_GLOBAL static locale::id id;	// unique facet id

	explicit __CLR_OR_THIS_CALL time_put(size_t _Refs = 0)
		: locale::facet(_Refs)
		{	// construct from current locale
		_BEGIN_LOCINFO(_Lobj)
			_Init(_Lobj);
		_END_LOCINFO()
		}

	__CLR_OR_THIS_CALL time_put(const _Locinfo& _Lobj, size_t _Refs = 0)
		: locale::facet(_Refs)
		{	// construct from specified locale
		_Init(_Lobj);
		}

	static size_t __CLRCALL_OR_CDECL _Getcat(const locale::facet **_Ppf = 0,
		const locale *_Ploc = 0)
		{	// return locale category mask and construct standard facet
		if (_Ppf != 0 && *_Ppf == 0)
			*_Ppf = _NEW_CRT time_put<_Elem, _OutIt>(
				_Locinfo(_Ploc->c_str()));
		return (_X_TIME);
		}

protected:
	virtual __CLR_OR_THIS_CALL ~time_put()
		{	// destroy the object
		}

	void __CLR_OR_THIS_CALL _Init(const _Locinfo& _Lobj)
		{	// initialize from _Lobj
		_Cvt = _Lobj._Getcvt();
		_Tnames = _Lobj._Gettnames();
		}

	virtual _OutIt __CLR_OR_THIS_CALL do_put(_OutIt _Dest,
		ios_base&, _Elem, const tm *_Pt,
			char _Specifier, char _Modifier = 0) const
		{	// put formatted time from _Pt to _Dest for [_Fmtfirst, _Fmtlast)
		_DEBUG_POINTER(_Dest);
		_DEBUG_POINTER(_Pt);
		char _Fmt[5] = "!%x\0";	// '!' for nonzero count, null for modifier
		size_t _Count, _Num;
		string _Str;

		if (_Modifier == (_Elem)0)
			_Fmt[2] = _Specifier;
		else
			_Fmt[2] = _Modifier, _Fmt[3] = _Specifier;

		for (_Num = 16; ; _Num *= 2)
			{	// convert into ever larger string buffer until success
			_Str.append(_Num, '\0');
			if (0 < (_Count = _Strftime(&*_Str.begin(), _Str.size(),
				_Fmt, _Pt, _Tnames._Getptr())))
				break;
			}

		for (string::const_iterator _Snext = _Str.begin();
			0 < --_Count; ++_Dest)	// skip literal '!'
			*_Dest = _MAKLOCCHR(_Elem, *++_Snext, _Cvt);
		return (_Dest);
		}

private:
	_Locinfo::_Timevec _Tnames;	// locale-specific stuff for _Strftime
	_Locinfo::_Cvtvec _Cvt;		// conversion information
	};

		// STATIC time_put::id OBJECT
template<class _Elem,
	class _OutIt>
	__PURE_APPDOMAIN_GLOBAL locale::id time_put<_Elem, _OutIt>::id;

		// CLASS time_put<wchar_t>