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fstream
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// fstream standard header
#pragma once
#ifndef _FSTREAM_
#define _FSTREAM_
#ifndef RC_INVOKED
#include <istream>
#pragma pack(push,_CRT_PACKING)
#pragma warning(push,3)
#pragma push_macro("new")
#undef new
_STD_BEGIN
#pragma warning(disable: 4127)
extern _CRTIMP2_PURE _Filet *__CLRCALL_PURE_OR_CDECL _Fiopen(
const char *,
ios_base::openmode, int);
extern _CRTIMP2_PURE _Filet *__CLRCALL_PURE_OR_CDECL _Fiopen(
const wchar_t *,
ios_base::openmode, int);
#ifdef _NATIVE_WCHAR_T_DEFINED
extern _CRTIMP2_PURE _Filet *__CLRCALL_PURE_OR_CDECL _Fiopen(
const unsigned short *,
ios_base::openmode, int);
#endif /* _NATIVE_WCHAR_T_DEFINED */
// TEMPLATE FUNCTION _Fgetc
template<class _Elem> inline
bool _Fgetc(_Elem& _Ch, _Filet *_File)
{ // get an element from a C stream
return (fread(&_Ch, sizeof (_Elem), 1, _File) == 1);
}
template<> inline bool _Fgetc(char& _Byte, _Filet *_File)
{ // get a char element from a C stream
int _Meta;
if ((_Meta = fgetc(_File)) == EOF)
return (false);
else
{ // got one, convert to char
_Byte = (char)_Meta;
return (true);
}
}
template<> inline bool _Fgetc(wchar_t& _Wchar, _Filet *_File)
{ // get a wchar_t element from a C stream
wint_t _Meta;
if ((_Meta = _CSTD fgetwc(_File)) == WEOF)
return (false);
else
{ // got one, convert to wchar_t
_Wchar = (wchar_t)_Meta;
return (true);
}
}
#ifdef _NATIVE_WCHAR_T_DEFINED
template<> inline bool _Fgetc(unsigned short& _Wchar, _Filet *_File)
{ // get an unsigned short element from a C stream
wint_t _Meta;
if ((_Meta = _CSTD fgetwc(_File)) == WEOF)
return (false);
else
{ // got one, convert to unsigned short
_Wchar = (unsigned short)_Meta;
return (true);
}
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
// TEMPLATE FUNCTION _Fputc
template<class _Elem> inline
bool _Fputc(_Elem _Ch, _Filet *_File)
{ // put an element to a C stream
return (fwrite(&_Ch, 1, sizeof (_Elem), _File) == sizeof (_Elem));
}
template<> inline bool _Fputc(char _Byte, _Filet *_File)
{ // put a char element to a C stream
return (fputc(_Byte, _File) != EOF);
}
template<> inline bool _Fputc(wchar_t _Wchar, _Filet *_File)
{ // put a wchar_t element to a C stream
return (_CSTD fputwc(_Wchar, _File) != WEOF);
}
#ifdef _NATIVE_WCHAR_T_DEFINED
template<> inline bool _Fputc(unsigned short _Wchar, _Filet *_File)
{ // put an unsigned short element to a C stream
return (_CSTD fputwc(_Wchar, _File) != WEOF);
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
// TEMPLATE FUNCTION _Ungetc
template<class _Elem> inline
bool _Ungetc(const _Elem& _Ch, _Filet *_File)
{ // put back an arbitrary element to a C stream (always fail)
return (false);
}
template<> inline bool _Ungetc(const char& _Byte, _Filet *_File)
{ // put back a char element to a C stream
return (ungetc((unsigned char)_Byte, _File) != EOF);
}
template<> inline bool _Ungetc(const signed char& _Byte, _Filet *_File)
{ // put back a signed char element to a C stream
return (ungetc((unsigned char)_Byte, _File) != EOF);
}
template<> inline bool _Ungetc(const unsigned char& _Byte, _Filet *_File)
{ // put back an unsigned char element to a C stream
return (ungetc(_Byte, _File) != EOF);
}
template<> inline bool _Ungetc(const wchar_t& _Wchar, _Filet *_File)
{ // put back a wchar_t element to a C stream
return (_CSTD ungetwc(_Wchar, _File) != WEOF);
}
#ifdef _NATIVE_WCHAR_T_DEFINED
template<> inline bool _Ungetc(const unsigned short& _Wchar, _Filet *_File)
{ // put back an unsigned short element to a C stream
return (_CSTD ungetwc(_Wchar, _File) != WEOF);
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
// TEMPLATE CLASS basic_filebuf
template<class _Elem,
class _Traits>
class basic_filebuf
: public basic_streambuf<_Elem, _Traits>
{ // stream buffer associated with a C stream
public:
typedef basic_filebuf<_Elem, _Traits> _Myt;
typedef basic_streambuf<_Elem, _Traits> _Mysb;
typedef typename _Traits::state_type _Myst;
typedef codecvt<_Elem, char, typename _Traits::state_type> _Cvt;
basic_filebuf(_Filet *_File = 0)
: _Mysb()
{ // construct from pointer to C stream
_Init(_File, _Newfl);
}
virtual __CLR_OR_THIS_CALL ~basic_filebuf() _NOEXCEPT
{ // destroy the object
if (_Myfile != 0)
_Reset_back(); // revert from _Mychar buffer
if (_Closef)
close();
}
typedef typename _Traits::int_type int_type;
typedef typename _Traits::pos_type pos_type;
typedef typename _Traits::off_type off_type;
basic_filebuf(_Uninitialized)
: _Mysb(_Noinit)
{ // construct uninitialized
}
basic_filebuf(_Myt&& _Right)
{ // construct by copying _Right
_Init(_Right._Myfile, _Newfl); // match buffering styles
_Init((_Filet *)0, _Closefl); // then make *this look closed
_Assign_rv(_STD forward<_Myt>(_Right));
}
_Myt& operator=(_Myt&& _Right)
{ // assign from _Right
_Assign_rv(_STD forward<_Myt>(_Right));
return (*this);
}
void _Assign_rv(_Myt&& _Right)
{ // assign by moving _Right
if (this != &_Right)
{ // different, worth moving
close();
this->swap(_Right);
}
}
void swap(_Myt& _Right)
{ // swap with _Right
if (this != &_Right)
{ // different, worth swapping
// save values altered by _Init
_Filet *_Myfile_sav = _Myfile;
const _Cvt *_Pcvt_sav = _Pcvt;
typename _Traits::state_type _State_sav = _State;
bool _Wrotesome_sav = _Wrotesome;
bool _Closef_sav = _Closef;
bool _Set_eback_sav = _Mysb::eback() == &_Mychar;
bool _Set_eback_live = _Mysb::gptr() == &_Mychar;
_Elem *_Pfirst0 = _Mysb::pbase();
_Elem *_Pnext0 = _Mysb::pptr();
_Elem *_Pend = _Mysb::epptr();
_Elem *_Gfirst0 = _Mysb::eback();
_Elem *_Gnext0 = _Mysb::gptr();
_Elem *_Gend = _Mysb::egptr();
// reinitialize *this
_Init(_Right._Myfile, _Right._Myfile != 0 ? _Openfl : _Newfl);
_Mysb::setp(_Right.pbase(), _Right.pptr(), _Right.epptr());
if (_Right.eback() != &_Right._Mychar)
_Mysb::setg(_Right.eback(), _Right.gptr(), _Right.egptr());
else if (_Right.gptr() != &_Right._Mychar)
_Mysb::setg(&_Mychar, &_Mychar + 1, &_Mychar + 1);
else
_Mysb::setg(&_Mychar, &_Mychar, &_Mychar + 1);
_Pcvt = _Right._Pcvt;
_State = _Right._State;
_Wrotesome = _Right._Wrotesome;
_Closef = _Right._Closef;
// reinitialize _Right
_Right._Init(_Myfile_sav, _Myfile_sav != 0 ? _Openfl : _Newfl);
_Right.setp(_Pfirst0, _Pnext0, _Pend);
if (!_Set_eback_sav)
_Right.setg(_Gfirst0, _Gnext0, _Gend);
else if (!_Set_eback_live)
_Right.setg(&_Right._Mychar, &_Right._Mychar + 1,
&_Right._Mychar + 1);
else
_Right.setg(&_Right._Mychar, &_Right._Mychar,
&_Right._Mychar + 1);
_Right._Pcvt = _Pcvt_sav;
_Right._State = _State_sav;
_Right._Wrotesome = _Wrotesome_sav;
_Right._Closef = _Closef_sav;
// swap ancillary data
_STD swap(_Set_eback, _Right._Set_eback);
_STD swap(_Set_egptr, _Right._Set_egptr);
_STD swap(_Mychar, _Right._Mychar);
_STD swap(_Mysb::_Plocale, _Right._Plocale);
}
}
basic_filebuf(const _Myt&) = delete;
_Myt& operator=(const _Myt&) = delete;
enum _Initfl
{ // reasons for a call to _Init
_Newfl, _Openfl, _Closefl};
bool is_open() const
{ // test if C stream has been opened
return (_Myfile != 0);
}
_Myt *open(const char *_Filename,
ios_base::openmode _Mode,
int _Prot = (int)ios_base::_Openprot)
{ // open a C stream with specified mode
_Filet *_File;
if (_Myfile != 0 || (_File = _Fiopen(_Filename, _Mode, _Prot)) == 0)
return (0); // open failed
_Init(_File, _Openfl);
_Initcvt(&_USE(_Mysb::getloc(), _Cvt));
return (this); // open succeeded
}
_Myt *open(const string& _Str,
ios_base::openmode _Mode,
int _Prot = (int)ios_base::_Openprot)
{ // open a C stream with specified mode
return (open(_Str.c_str(), _Mode, _Prot));
}
_Myt *open(const char *_Filename, ios_base::open_mode _Mode)
{ // open a C stream with specified mode (old style)
return (open(_Filename, (ios_base::openmode)_Mode));
}
_Myt *open(const wchar_t *_Filename,
ios_base::openmode _Mode,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
_Filet *_File;
if (_Myfile != 0 || (_File = _Fiopen(_Filename, _Mode, _Prot)) == 0)
return (0); // open failed
_Init(_File, _Openfl);
_Initcvt(&_USE(_Mysb::getloc(), _Cvt));
return (this); // open succeeded
}
_Myt *open(const wstring& _Str,
ios_base::openmode _Mode,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
return (open(_Str.c_str(), _Mode, _Prot));
}
_Myt *open(const wchar_t *_Filename,
ios_base::open_mode _Mode)
{ // open a wide-named C stream (old style) -- EXTENSION
return (open(_Filename, (ios_base::openmode)_Mode));
}
#ifdef _NATIVE_WCHAR_T_DEFINED
_Myt *open(const unsigned short *_Filename,
ios_base::openmode _Mode,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
_Filet *_File;
if (_Myfile != 0 || (_File = _Fiopen(_Filename, _Mode, _Prot)) == 0)
return (0); // open failed
_Init(_File, _Openfl);
_Initcvt(&_USE(_Mysb::getloc(), _Cvt));
return (this); // open succeeded
}
_Myt *open(const unsigned short *_Filename,
ios_base::open_mode _Mode)
{ // open a wide-named C stream (old style) -- EXTENSION
return (open(_Filename, (ios_base::openmode)_Mode));
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
_Myt *close()
{ // close the C stream
_Myt *_Ans = this;
if (_Myfile == 0)
_Ans = 0;
else
{ // put any homing sequence and close file
if (!_Endwrite())
_Ans = 0;
if (fclose(_Myfile) != 0)
_Ans = 0;
}
_Init(0, _Closefl);
return (_Ans);
}
virtual void __CLR_OR_THIS_CALL _Lock()
{ // lock file instead of stream buffer
if (_Myfile)
_CSTD _lock_file(_Myfile);
}
virtual void __CLR_OR_THIS_CALL _Unlock()
{ // unlock file instead of stream buffer
if (_Myfile)
_CSTD _unlock_file(_Myfile);
}
protected:
virtual int_type __CLR_OR_THIS_CALL overflow(int_type _Meta =
_Traits::eof())
{ // put an element to stream
if (_Traits::eq_int_type(_Traits::eof(), _Meta))
return (_Traits::not_eof(_Meta)); // EOF, return success code
else if (_Mysb::pptr() != 0
&& _Mysb::pptr() < _Mysb::epptr())
{ // room in buffer, store it
*_Mysb::_Pninc() = _Traits::to_char_type(_Meta);
return (_Meta);
}
else if (_Myfile == 0)
return (_Traits::eof()); // no open C stream, fail
_Reset_back(); // revert from _Mychar buffer
if (_Pcvt == 0)
return (_Fputc(_Traits::to_char_type(_Meta), _Myfile)
? _Meta : _Traits::eof()); // no codecvt facet, put as is
else
{ // put using codecvt facet
const int _STRING_INC = 8;
const _Elem _Ch = _Traits::to_char_type(_Meta);
const _Elem *_Src;
char *_Dest;
string _Str(_STRING_INC, '\0');
for (; ; )
switch (_Pcvt->out(_State,
&_Ch, &_Ch + 1, _Src,
&*_Str.begin(), &*_Str.begin() + _Str.size(), _Dest))
{ // test result of converting one element
case codecvt_base::partial:
case codecvt_base::ok:
{ // converted something, try to put it out
size_t _Count = _Dest - &*_Str.begin();
if (0 < _Count && _Count !=
fwrite(&*_Str.begin(), 1, _Count, _Myfile))
return (_Traits::eof()); // write failed
_Wrotesome = true; // write succeeded
if (_Src != &_Ch)
return (_Meta); // converted whole element
if (0 < _Count)
;
else if (_Str.size() < 4 * _STRING_INC)
_Str.append(_STRING_INC, '\0'); // try with more space
else
return (_Traits::eof()); // conversion failed
break;
}
case codecvt_base::noconv:
return (_Fputc(_Ch, _Myfile) ? _Meta
: _Traits::eof()); // no conversion, put as is
default:
return (_Traits::eof()); // conversion failed
}
}
}
virtual int_type __CLR_OR_THIS_CALL pbackfail(int_type _Meta =
_Traits::eof())
{ // put an element back to stream
if (_Mysb::gptr() != 0
&& _Mysb::eback() < _Mysb::gptr()
&& (_Traits::eq_int_type(_Traits::eof(), _Meta)
|| _Traits::eq_int_type(_Traits::to_int_type(_Mysb::gptr()[-1]),
_Meta)))
{ // just back up position
_Mysb::_Gndec();
return (_Traits::not_eof(_Meta));
}
else if (_Myfile == 0 || _Traits::eq_int_type(_Traits::eof(), _Meta))
return (_Traits::eof()); // no open C stream or EOF, fail
else if (_Pcvt == 0 && _Ungetc(_Traits::to_char_type(_Meta), _Myfile))
return (_Meta); // no facet and unget succeeded, return
else if (_Mysb::gptr() != &_Mychar)
{ // putback to _Mychar
_Mychar = _Traits::to_char_type(_Meta);
_Set_back(); // switch to _Mychar buffer
return (_Meta);
}
else
return (_Traits::eof()); // nowhere to put back
}
virtual int_type __CLR_OR_THIS_CALL underflow()
{ // get an element from stream, but don't point past it
int_type _Meta;
if (_Mysb::gptr() != 0
&& _Mysb::gptr() < _Mysb::egptr())
return (_Traits::to_int_type(*_Mysb::gptr())); // return buffered
else if (_Traits::eq_int_type(_Traits::eof(), _Meta = uflow()))
return (_Meta); // uflow failed, return EOF
else
{ // get a char, don't point past it
pbackfail(_Meta);
return (_Meta);
}
}
virtual int_type __CLR_OR_THIS_CALL uflow()
{ // get an element from stream, point past it
if (_Mysb::gptr() != 0
&& _Mysb::gptr() < _Mysb::egptr())
return (_Traits::to_int_type(
*_Mysb::_Gninc())); // return buffered
else if (_Myfile == 0)
return (_Traits::eof()); // no open C stream, fail
_Reset_back(); // revert from _Mychar buffer
if (_Pcvt == 0)
{ // no codecvt facet, just get it
_Elem _Ch = 0;
return (_Fgetc(_Ch, _Myfile) ? _Traits::to_int_type(_Ch)
: _Traits::eof());
}
else
{ // build string until codecvt succeeds
string _Str;
for (; ; )
{ // get using codecvt facet
_Elem _Ch, *_Dest;
const char *_Src;
int _Nleft;
int _Meta = fgetc(_Myfile);
if (_Meta == EOF)
return (_Traits::eof()); // partial char?
_Str.append(1, (char)_Meta); // append byte and convert
switch (_Pcvt->in(_State,
&*_Str.begin(), &*_Str.begin() + _Str.size(), _Src,
&_Ch, &_Ch + 1, _Dest))
{ // test result of converting one element
case codecvt_base::partial:
case codecvt_base::ok:
if (_Dest != &_Ch)
{ // got an element, put back excess and deliver it
_Nleft = (int)(&*_Str.begin() + _Str.size() - _Src);
for (; 0 < _Nleft; )
ungetc(_Src[--_Nleft], _Myfile);
return (_Traits::to_int_type(_Ch));
}
else
_Str.erase((size_t)0, // partial, discard used input
(size_t)(_Src - &*_Str.begin()));
break;
case codecvt_base::noconv:
if (_Str.size() < sizeof (_Elem))
break; // no conversion, but need more chars
_CRT_SECURE_MEMCPY(&_Ch, sizeof (_Elem), &*_Str.begin(),
sizeof (_Elem)); // copy raw bytes to element
return (_Traits::to_int_type(_Ch)); // return result
default:
return (_Traits::eof()); // conversion failed
}
}
}
}
virtual pos_type __CLR_OR_THIS_CALL seekoff(off_type _Off,
ios_base::seekdir _Way,
ios_base::openmode =
(ios_base::openmode)(ios_base::in | ios_base::out))
{ // change position by _Off
fpos_t _Fileposition;
if (_Mysb::gptr() == &_Mychar // something putback
&& _Way == ios_base::cur // a relative seek
&& _Pcvt == 0) // not converting
_Off -= (off_type)sizeof (_Elem); // back up over _Elem bytes
if (_Myfile == 0 || !_Endwrite()
|| ((_Off != 0 || _Way != ios_base::cur)
&& _FSEEK_OFF(_Myfile, _Off, _Way) != 0)
|| fgetpos(_Myfile, &_Fileposition) != 0)
return (pos_type(_BADOFF)); // report failure
_Reset_back(); // revert from _Mychar buffer, discarding any putback
return (_POS_TYPE_FROM_STATE(pos_type, _State,
_Fileposition)); // return new position
}
virtual pos_type __CLR_OR_THIS_CALL seekpos(pos_type _Pos,
ios_base::openmode =
(ios_base::openmode)(ios_base::in | ios_base::out))
{ // change position to _Pos
fpos_t _Fileposition = _POS_TYPE_TO_FPOS_T(_Pos);
off_type _Off = (off_type)_Pos - (off_type)_FPOSOFF(_Fileposition);
if (_Myfile == 0 || !_Endwrite()
|| fsetpos(_Myfile, &_Fileposition) != 0
|| (_Off != 0 && _FSEEK_OFF(_Myfile, _Off, SEEK_CUR) != 0)
|| fgetpos(_Myfile, &_Fileposition) != 0)
return (pos_type(_BADOFF)); // report failure
_State = _POS_TYPE_TO_STATE(_Pos);
_Reset_back(); // revert from _Mychar buffer, discarding any putback
return (_POS_TYPE_FROM_STATE(pos_type, _State,
_Fileposition)); // return new position
}
virtual _Mysb *__CLR_OR_THIS_CALL setbuf(_Elem *_Buffer, streamsize _Count)
{ // offer _Buffer to C stream
if (_Myfile == 0 || setvbuf(_Myfile, (char *)_Buffer,
_Buffer == 0 && _Count == 0 ? _IONBF : _IOFBF,
(size_t)_Count * sizeof (_Elem)) != 0)
return (0); // failed
else
{ // new buffer, reinitialize pointers
_Init(_Myfile, _Openfl);
return (this);
}
}
virtual int __CLR_OR_THIS_CALL sync()
{ // synchronize C stream with external file
return (_Myfile == 0
|| _Traits::eq_int_type(_Traits::eof(), overflow())
|| 0 <= fflush(_Myfile) ? 0 : -1);
}
virtual void __CLR_OR_THIS_CALL imbue(const locale& _Loc)
{ // set locale to argument (capture nontrivial codecvt facet)
_Initcvt(&_USE(_Loc, _Cvt));
}
void _Init(_Filet *_File, _Initfl _Which)
{ // initialize to C stream _File after {new, open, close}
__PURE_APPDOMAIN_GLOBAL static _Myst _Stinit; // initial state
_Closef = _Which == _Openfl;
_Wrotesome = false;
_Mysb::_Init(); // initialize stream buffer base object
#ifndef _IORCNT
#define _IORCNT _IOCNT /* read and write counts are the same */
#define _IOWCNT _IOCNT
#endif /* _IORCNT */
#pragma warning(push)
#pragma warning(disable: 6240) /* prefast noise VSW 489858 */
if (_File != 0 && sizeof (_Elem) == 1)
#pragma warning(pop)
{ // point inside C stream with [first, first + count) buffer
_Elem **_Pb = 0;
_Elem **_Pn = 0;
int *_Nr = 0;
::_get_stream_buffer_pointers(
_File,
reinterpret_cast<char***>(&_Pb),
reinterpret_cast<char***>(&_Pn),
&_Nr);
int *_Nw = _Nr;
_Mysb::_Init(_Pb, _Pn, _Nr, _Pb, _Pn, _Nw);
}
_Myfile = _File;
_State = _Stinit;
_Pcvt = 0; // pointer to codecvt facet
}
bool _Endwrite()
{ // put shift to initial conversion state, as needed
if (_Pcvt == 0 || !_Wrotesome)
return (true);
else
{ // may have to put
const int _STRING_INC = 8;
char *_Dest;
if (_Traits::eq_int_type(_Traits::eof(), overflow()))
return (false);
string _Str(_STRING_INC, '\0');
for (; ; )
switch (_Pcvt->unshift(_State,
&*_Str.begin(), &*_Str.begin() + _Str.size(), _Dest))
{ // test result of homing conversion
case codecvt_base::ok:
_Wrotesome = false; // homed successfully
case codecvt_base::partial: // fall through
{ // put any generated bytes
size_t _Count = _Dest - &*_Str.begin();
if (0 < _Count && _Count !=
fwrite(&*_Str.begin(), 1, _Count, _Myfile))
return (false); // write failed
if (!_Wrotesome)
return (true);
if (_Count == 0)
_Str.append(_STRING_INC, '\0'); // try with more space
break;
}
case codecvt_base::noconv:
return (true); // nothing to do
default:
return (false); // conversion failed
}
}
}
void _Initcvt(const _Cvt *_Newpcvt)
{ // initialize codecvt pointer
if (_Newpcvt->always_noconv())
_Pcvt = 0; // nothing to do
else
{ // set up for nontrivial codecvt facet
_Pcvt = _Newpcvt;
_Mysb::_Init(); // reset any buffering
}
}
private:
const _Cvt *_Pcvt; // pointer to codecvt facet (may be null)
_Elem _Mychar; // putback character, when _Ungetc fails
bool _Wrotesome; // true if homing sequence may be needed
typename _Traits::state_type _State; // current conversion state
bool _Closef; // true if C stream must be closed
_Filet *_Myfile; // pointer to C stream
void _Reset_back()
{ // restore buffer after putback
if (_Mysb::eback() == &_Mychar)
_Mysb::setg(_Set_eback, _Set_eback, _Set_egptr);
}
void _Set_back()
{ // set up putback area
if (_Mysb::eback() != &_Mychar)
{ // save current get buffer
_Set_eback = _Mysb::eback();
_Set_egptr = _Mysb::egptr();
}
_Mysb::setg(&_Mychar, &_Mychar, &_Mychar + 1);
}
_Elem *_Set_eback; // saves eback() during one-element putback
_Elem *_Set_egptr; // saves egptr()
};
// basic_filebuf TEMPLATE OPERATORS
template<class _Elem,
class _Traits> inline
void swap(basic_filebuf<_Elem, _Traits>& _Left,
basic_filebuf<_Elem, _Traits>& _Right)
{ // swap _Left and _Right basic_filebufs
_Left.swap(_Right);
}
// TEMPLATE CLASS basic_ifstream
template<class _Elem,
class _Traits>
class basic_ifstream
: public basic_istream<_Elem, _Traits>
{ // input stream associated with a C stream
public:
typedef basic_ifstream<_Elem, _Traits> _Myt;
typedef basic_istream<_Elem, _Traits> _Mybase;
typedef basic_filebuf<_Elem, _Traits> _Myfb;
typedef basic_ios<_Elem, _Traits> _Myios;
basic_ifstream()
: _Mybase(&_Filebuffer)
{ // construct unopened
}
explicit basic_ifstream(const char *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with named file and specified mode
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ifstream(const string& _Str,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with named file and specified mode
if (_Filebuffer.open(_Str.c_str(), _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ifstream(const wchar_t *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ifstream(const wstring& _Str,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Str.c_str(), _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
#ifdef _NATIVE_WCHAR_T_DEFINED
explicit basic_ifstream(const unsigned short *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
explicit basic_ifstream(_Filet *_File)
: _Mybase(&_Filebuffer),
_Filebuffer(_File)
{ // construct with specified C stream
}
basic_ifstream(_Myt&& _Right)
: _Mybase(&_Filebuffer)
{ // construct by moving _Right
_Assign_rv(_STD forward<_Myt>(_Right));
}
_Myt& operator=(_Myt&& _Right)
{ // move from _Right
_Assign_rv(_STD forward<_Myt>(_Right));
return (*this);
}
void _Assign_rv(_Myt&& _Right)
{ // assign by moving _Right
if (this != &_Right)
{ // different, worth moving
_Filebuffer.close();
this->swap(_Right);
}
}
void swap(_Myt& _Right)
{ // swap with _Right
if (this != &_Right)
{ // different, swap base and buffer
_Mybase::swap(_Right);
_Filebuffer.swap(_Right._Filebuffer);
}
}
basic_ifstream(const _Myt&) = delete;
_Myt& operator=(const _Myt&) = delete;
void open(const wchar_t *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
else
_Myios::clear(); // added with C++11
}
void open(const wstring& _Str,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
open(_Str.c_str(), _Mode, _Prot);
}
void open(const wchar_t *_Filename, ios_base::open_mode _Mode)
{ // open wide-named file (old style) -- EXTENSION
open(_Filename, (ios_base::openmode)_Mode);
}
#ifdef _NATIVE_WCHAR_T_DEFINED
void open(const unsigned short *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
{ // open a wide-named C stream -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
else
_Myios::clear(); // added with C++11
}
void open(const unsigned short *_Filename,
ios_base::open_mode _Mode)
{ // open wide-named file (old style) -- EXTENSION
open(_Filename, (ios_base::openmode)_Mode);
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
virtual __CLR_OR_THIS_CALL ~basic_ifstream() _NOEXCEPT
{ // destroy the object
}
_Myfb *rdbuf() const
{ // return pointer to file buffer
return ((_Myfb *)&_Filebuffer);
}
bool is_open() const
{ // test if C stream has been opened
return (_Filebuffer.is_open());
}
void open(const char *_Filename,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
{ // open a C stream with specified mode
if (_Filebuffer.open(_Filename, _Mode | ios_base::in, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
else
_Myios::clear(); // added with C++11
}
void open(const string& _Str,
ios_base::openmode _Mode = ios_base::in,
int _Prot = (int)ios_base::_Openprot)
{ // open a C stream with specified mode
open(_Str.c_str(), _Mode, _Prot);
}
void open(const char *_Filename, ios_base::open_mode _Mode)
{ // open named file with specified mode (old style)
open(_Filename, (ios_base::openmode)_Mode);
}
void close()
{ // close the C stream
if (_Filebuffer.close() == 0)
_Myios::setstate(ios_base::failbit);
}
private:
_Myfb _Filebuffer; // the file buffer
};
// basic_ifstream TEMPLATE OPERATORS
template<class _Elem,
class _Traits> inline
void swap(basic_ifstream<_Elem, _Traits>& _Left,
basic_ifstream<_Elem, _Traits>& _Right)
{ // swap _Left and _Right basic_ifstreams
_Left.swap(_Right);
}
// TEMPLATE CLASS basic_ofstream
template<class _Elem,
class _Traits>
class basic_ofstream
: public basic_ostream<_Elem, _Traits>
{ // output stream associated with a C stream
public:
typedef basic_ofstream<_Elem, _Traits> _Myt;
typedef basic_ostream<_Elem, _Traits> _Mybase;
typedef basic_filebuf<_Elem, _Traits> _Myfb;
typedef basic_ios<_Elem, _Traits> _Myios;
basic_ofstream()
: _Mybase(&_Filebuffer)
{ // construct unopened
}
explicit basic_ofstream(const char *_Filename,
ios_base::openmode _Mode = ios_base::out,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with named file and specified mode
if (_Filebuffer.open(_Filename, _Mode | ios_base::out, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ofstream(const string& _Str,
ios_base::openmode _Mode = ios_base::out,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with named file and specified mode
if (_Filebuffer.open(_Str.c_str(), _Mode | ios_base::out, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ofstream(const wchar_t *_Filename,
ios_base::openmode _Mode = ios_base::out,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::out, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
explicit basic_ofstream(const wstring& _Str,
ios_base::openmode _Mode = ios_base::out,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Str.c_str(), _Mode | ios_base::out, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
#ifdef _NATIVE_WCHAR_T_DEFINED
explicit basic_ofstream(const unsigned short *_Filename,
ios_base::openmode _Mode = ios_base::out,
int _Prot = (int)ios_base::_Openprot)
: _Mybase(&_Filebuffer)
{ // construct with wide-named file -- EXTENSION
if (_Filebuffer.open(_Filename, _Mode | ios_base::out, _Prot) == 0)
_Myios::setstate(ios_base::failbit);
}
#endif /* _NATIVE_WCHAR_T_DEFINED */
explicit basic_ofstream(_Filet *_File)
: _Mybase(&_Filebuffer),
_Filebuffer(_File)
{ // construct with specified C stream
}
basic_ofstream(_Myt&& _Right)
: _Mybase(&_Filebuffer)
{ // construct by moving _Right
_Assign_rv(_STD forward<_Myt>(_Right));
}
_Myt& operator=(_Myt&& _Right)
{ // move from _Right