206 lines
5.9 KiB
Plaintext
206 lines
5.9 KiB
Plaintext
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// streambuf standard header
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#ifndef _STREAMBUF_
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#define _STREAMBUF_
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#include <xlocnum>
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#ifdef _MSC_VER
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#pragma pack(push,8)
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#endif /* _MSC_VER */
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_STD_BEGIN
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// TEMPLATE CLASS basic_streambuf
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template<class _E, class _Tr = char_traits<_E> >
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class basic_streambuf {
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protected:
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basic_streambuf()
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: _Loc() {_Init(); }
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basic_streambuf(_Uninitialized)
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: _Loc(_Noinit) {}
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public:
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typedef basic_streambuf<_E, _Tr> _Myt;
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typedef _E char_type;
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typedef _Tr traits_type;
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virtual ~basic_streambuf()
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{}
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typedef _Tr::int_type int_type;
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typedef _Tr::pos_type pos_type;
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typedef _Tr::off_type off_type;
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pos_type pubseekoff(off_type _O, ios_base::seekdir _W,
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ios_base::openmode _M = ios_base::in | ios_base::out)
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{return (seekoff(_O, _W, _M)); }
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pos_type pubseekoff(off_type _O, ios_base::seek_dir _W,
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ios_base::open_mode _M)
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{return (pubseekoff(_O, (ios_base::seekdir)_W,
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(ios_base::openmode)_M)); }
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pos_type pubseekpos(pos_type _P,
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ios_base::openmode _M = ios_base::in | ios_base::out)
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{return (seekpos(_P, _M)); }
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pos_type pubseekpos(pos_type _P, ios_base::open_mode _M)
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{return (seekpos(_P, (ios_base::openmode)_M)); }
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_Myt *pubsetbuf(_E *_S, streamsize _N)
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{return (setbuf(_S, _N)); }
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locale pubimbue(const locale &_Ln)
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{locale _Lo = _Loc;
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imbue(_Ln);
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_Loc = _Ln;
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return (_Lo); }
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locale getloc()
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{return (_Loc); }
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streamsize in_avail()
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{return (gptr() != 0 && gptr() < egptr()
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? egptr() - gptr() : showmanyc()); }
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int pubsync()
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{return (sync()); }
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int_type sbumpc()
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{return (gptr() != 0 && gptr() < egptr()
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? _Tr::to_int_type(*_Gninc()) : uflow()); }
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int_type sgetc()
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{return (gptr() != 0 && gptr() < egptr()
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? _Tr::to_int_type(*gptr()) : underflow()); }
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streamsize sgetn(_E *_S, streamsize _N)
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{return (xsgetn(_S, _N)); }
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int_type snextc()
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{return (_Tr::eq_int_type(_Tr::eof(), sbumpc())
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? _Tr::eof() : sgetc()); }
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int_type sputbackc(_E _C)
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{return (gptr() != 0 && eback() < gptr()
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&& _Tr::eq(_C, gptr()[-1])
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? _Tr::to_int_type(*_Gndec())
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: pbackfail(_Tr::to_int_type(_C))); }
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void stossc()
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{if (gptr() != 0 && gptr() < egptr())
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_Gninc();
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else
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uflow(); }
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int_type sungetc()
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{return (gptr() != 0 && eback() < gptr()
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? _Tr::to_int_type(*_Gndec()) : pbackfail()); }
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int_type sputc(_E _C)
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{return (pptr() != 0 && pptr() < epptr()
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? _Tr::to_int_type(*_Pninc() = _C)
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: overflow(_Tr::to_int_type(_C))); }
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streamsize sputn(const _E *_S, streamsize _N)
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{return (xsputn(_S, _N)); }
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protected:
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_E *eback() const
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{return (*_IGbeg); }
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_E *gptr() const
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{return (*_IGnext); }
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_E *pbase() const
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{return (*_IPbeg); }
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_E *pptr() const
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{return (*_IPnext); }
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_E *egptr() const
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{return (*_IGnext + *_IGcnt); }
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void gbump(int _N)
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{*_IGcnt -= _N;
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*_IGnext += _N; }
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void setg(_E *_B, _E *_N, _E *_L)
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{*_IGbeg = _B, *_IGnext = _N, *_IGcnt = (int) (_L - _N); }
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_E *epptr() const
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{return (*_IPnext + *_IPcnt); }
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_E *_Gndec()
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{++*_IGcnt;
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return (--*_IGnext); }
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_E *_Gninc()
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{--*_IGcnt;
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return ((*_IGnext)++); }
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void pbump(int _N)
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{*_IPcnt -= _N;
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*_IPnext += _N; }
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void setp(_E *_B, _E *_L)
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{*_IPbeg = _B, *_IPnext = _B, *_IPcnt = (int) (_L - _B); }
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void setp(_E *_B, _E *_N, _E *_L)
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{*_IPbeg = _B, *_IPnext = _N, *_IPcnt = (int) (_L - _N); }
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_E *_Pninc()
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{--*_IPcnt;
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return ((*_IPnext)++); }
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void _Init()
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{_IGbeg = &_Gbeg, _IPbeg = &_Pbeg;
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_IGnext = &_Gnext, _IPnext = &_Pnext;
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_IGcnt = &_Gcnt, _IPcnt = &_Pcnt;
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setp(0, 0), setg(0, 0, 0); }
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void _Init(_E **_Gb, _E **_Gn, int *_Gc,
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_E **_Pb, _E **_Pn, int *_Pc)
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{_IGbeg = _Gb, _IPbeg = _Pb;
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_IGnext = _Gn, _IPnext = _Pn;
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_IGcnt = _Gc, _IPcnt = _Pc; }
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virtual int_type overflow(int_type = _Tr::eof())
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{return (_Tr::eof()); }
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virtual int_type pbackfail(int_type = _Tr::eof())
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{return (_Tr::eof()); }
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virtual int showmanyc()
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{return (0); }
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virtual int_type underflow()
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{return (_Tr::eof()); }
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virtual int_type uflow()
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{return (_Tr::eq_int_type(_Tr::eof(), underflow())
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? _Tr::eof() : _Tr::to_int_type(*_Gninc())); }
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virtual streamsize xsgetn(_E * _S, streamsize _N)
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{int_type _C;
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streamsize _M, _Ns;
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for (_Ns = 0; 0 < _N; )
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if (gptr() != 0 && 0 < (_M = (streamsize) (egptr() - gptr())))
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{if (_N < _M)
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_M = _N;
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_Tr::copy(_S, gptr(), _M);
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_S += _M, _Ns += _M, _N -= _M, gbump((int)_M); }
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else if (_Tr::eq_int_type(_Tr::eof(), _C = uflow()))
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break;
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else
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*_S++ = _Tr::to_char_type(_C), ++_Ns, --_N;
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return (_Ns); }
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virtual streamsize xsputn(const _E *_S, streamsize _N)
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{streamsize _M, _Ns;
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for (_Ns = 0; 0 < _N; )
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if (pptr() != 0 && 0 < (_M = (streamsize) (epptr() - pptr())))
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{if (_N < _M)
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_M = _N;
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_Tr::copy(pptr(), _S, _M);
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_S += _M, _Ns += _M, _N -= _M, pbump((int)_M); }
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else if (_Tr::eq_int_type(_Tr::eof(),
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overflow(_Tr::to_int_type(*_S))))
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break;
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else
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++_S, ++_Ns, --_N;
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return (_Ns); }
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virtual pos_type seekoff(off_type, ios_base::seekdir,
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ios_base::openmode = ios_base::in | ios_base::out)
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{return (streampos(_BADOFF)); }
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virtual pos_type seekpos(pos_type,
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ios_base::openmode = ios_base::in | ios_base::out)
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{return (streampos(_BADOFF)); }
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virtual _Myt *setbuf(_E *, streamsize)
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{return (this); }
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virtual int sync()
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{return (0); }
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virtual void imbue(const locale& _Loc)
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{}
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private:
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_E *_Gbeg, *_Pbeg;
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_E **_IGbeg, **_IPbeg;
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_E *_Gnext, *_Pnext;
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_E **_IGnext, **_IPnext;
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int _Gcnt, _Pcnt;
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int *_IGcnt, *_IPcnt;
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locale _Loc;
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};
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#ifdef _DLL
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#pragma warning(disable:4231) /* the extern before template is a non-standard extension */
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extern template class _CRTIMP basic_streambuf<char, char_traits<char> >;
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extern template class _CRTIMP basic_streambuf<wchar_t, char_traits<wchar_t> >;
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#pragma warning(default:4231) /* restore previous warning */
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#endif // _DLL
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_STD_END
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#ifdef _MSC_VER
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#pragma pack(pop)
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#endif /* _MSC_VER */
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#endif /* _STREAMBUF_ */
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/*
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* Copyright (c) 1994 by P.J. Plauger. ALL RIGHTS RESERVED.
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* Consult your license regarding permissions and restrictions.
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*/
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