375 lines
11 KiB
Plaintext
375 lines
11 KiB
Plaintext
// fstream standard header
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#ifndef _FSTREAM_
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#define _FSTREAM_
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#include <istream>
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#include <new>
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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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extern _CRTIMP FILE *__cdecl __Fiopen(const char *,ios_base::openmode);
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// TEMPLATE FUNCTION _Fgetc
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template<class _E> inline
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bool _Fgetc(_E& _C, _Filet *_Fi)
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{return (fread(&_C, sizeof (_E), 1, _Fi) == 1); }
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inline bool _Fgetc(char& _C, _Filet *_Fi)
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{int _Ch;
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if ((_Ch = fgetc(_Fi)) == EOF)
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return (false);
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else
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{_C = (char)_Ch;
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return (true); }}
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inline bool _Fgetc(wchar_t& _C, _Filet *_Fi)
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{_Wint_t _Ch;
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if ((_Ch = fgetwc(_Fi)) == WEOF)
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return (false);
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else
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{_C = _Ch;
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return (true); }}
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// TEMPLATE FUNCTION _Fputc
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template<class _E> inline
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bool _Fputc(_E _C, _Filet *_Fi)
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{return (fwrite(&_C, sizeof (_E), 1, _Fi) == 1); }
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inline bool _Fputc(char _C, _Filet *_Fi)
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{return (fputc(_C, _Fi) != EOF); }
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inline bool _Fputc(wchar_t _C, _Filet *_Fi)
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{return (fputwc(_C, _Fi) != WEOF); }
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// TEMPLATE FUNCTION _Ungetc
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template<class _E> inline
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bool _Ungetc(const _E& _C, _Filet *_Fi, size_t _N)
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{const unsigned char *_P = (const unsigned char *)&_C;
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for (_P += _N; 0 < _N && ungetc(*--_P, _Fi) != EOF; --_N)
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;
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if (_N == 0)
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return (true);
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else
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{for (; _N < sizeof (_E); ++_N)
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fgetc(_Fi);
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return (false); }}
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template<class _E> inline
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bool _Ungetc(const _E& _C, _Filet *_Fi)
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{return (_Ungetc(_C, _Fi, sizeof (_E))); }
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inline bool _Ungetc(char _C, _Filet *_Fi)
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{return (ungetc((unsigned char)_C, _Fi) != EOF); }
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inline bool _Ungetc(wchar_t _C, _Filet *_Fi)
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{return (ungetwc(_C, _Fi) != WEOF); }
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// TEMPLATE CLASS basic_filebuf
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template<class _E, class _Tr = char_traits<_E> >
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class basic_filebuf : public basic_streambuf<_E, _Tr> {
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public:
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typedef basic_filebuf<_E, _Tr> _Myt;
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typedef basic_streambuf<_E, _Tr> _Mysb;
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typedef codecvt<_E, char, _Tr::state_type> _Cvt;
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basic_filebuf(_Filet *_F = 0)
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: _Loc(), _Mysb() {_Init(_F, _Newfl); }
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basic_filebuf(_Uninitialized)
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: _Loc(_Noinit), _Mysb(_Noinit) {}
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virtual ~basic_filebuf()
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{if (_Closef)
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close();
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delete _Str; }
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enum _Initfl {_Newfl, _Openfl, _Closefl};
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bool is_open() const
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{return (_File != 0); }
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_Myt *open(const char *_S, ios_base::openmode _M)
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{_Filet *_Fp;
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if (_File != 0 || (_Fp = __Fiopen(_S, _M)) == 0)
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return (0);
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_Init(_Fp, _Openfl);
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_Initcvt();
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return (this); }
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_Myt *open(const char *_N, ios::open_mode _M)
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{return (open(_N, (ios::openmode)_M)); }
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_Myt *close()
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{if (_File != 0 && fclose(_File) == 0)
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{_Init(0, _Closefl);
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return (this); }
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else
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return (0); }
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protected:
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virtual int_type overflow(int_type _C = _Tr::eof())
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{if (_Tr::eq_int_type(_Tr::eof(), _C))
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return (_Tr::not_eof(_C));
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else if (pptr() != 0 && pptr() < epptr())
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{*_Pninc() = _Tr::to_char_type(_C);
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return (_C); }
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else if (_File == 0)
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return (_Tr::eof());
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else if (_Pcvt == 0)
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return (_Fputc(_Tr::to_char_type(_C), _File)
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? _C : _Tr::eof());
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else
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{const int _NC = 8;
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const _E _X = _Tr::to_char_type(_C);
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const _E *_S;
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char *_D;
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_Str->erase();
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for (size_t _I = _NC; ; _I += _NC)
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{_Str->append(_NC, '\0');
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switch (_Pcvt->out(_State,
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&_X, &_X + 1, _S,
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_Str->begin(), _Str->end(), _D))
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{case codecvt_base::partial:
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if (_S == &_X)
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return (_Tr::eof());
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case codecvt_base::ok: // can fall through
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{size_t _N = _D - _Str->begin();
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return (fwrite(_Str->begin(), 1, _N, _File)
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== _N ? _C : _Tr::eof()); }
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case codecvt_base::noconv:
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return (_Fputc(_X, _File) ? _C : _Tr::eof());
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default:
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return (_Tr::eof()); }}}}
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virtual int_type pbackfail(int_type _C = _Tr::eof())
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{if (gptr() != 0 && eback() < gptr()
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&& (_Tr::eq_int_type(_Tr::eof(), _C)
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|| _Tr::eq_int_type(_Tr::to_int_type(gptr()[-1]),
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_C)))
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{_Gndec();
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return (_Tr::not_eof(_C)); }
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else if (_File == 0 || _Tr::eq_int_type(_Tr::eof(), _C))
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return (_Tr::eof());
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else if (_Pcvt == 0)
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return (_Ungetc(_Tr::to_char_type(_C), _File)
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? _C : _Tr::eof());
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else if (0 < _Str->size()
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&& _Ungetc(*_Str->begin(), _File, _Str->size()))
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{_Str->erase();
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_State = _State0;
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return (_C); }
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else
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return (_Tr::eof()); }
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virtual int_type underflow()
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{if (gptr() != 0 && gptr() < egptr())
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return (_Tr::to_int_type(*gptr()));
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else
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return (pbackfail(uflow())); }
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virtual int_type uflow()
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{if (gptr() != 0 && gptr() < egptr())
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return (_Tr::to_int_type(*_Gninc()));
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else if (_File == 0)
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return (_Tr::eof());
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else if (_Pcvt == 0)
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{_E _C;
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return (_Fgetc(_C, _File) ? _Tr::to_int_type(_C)
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: _Tr::eof()); }
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else
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for (_State0 = _State, _Str->erase(); ; )
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{_E _X, *_D;
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const char *_S;
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int _C = fgetc(_File);
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if (_C == EOF)
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return (_Tr::eof()); // partial char?
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_Str->append(1, (char)_C);
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_State = _State0;
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switch (_Pcvt->in(_State,
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_Str->begin(), _Str->end(), _S,
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&_X, &_X + 1, _D))
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{case codecvt_base::partial:
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break;
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case codecvt_base::noconv:
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if (_Str->size() < sizeof (_E))
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break;
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memcpy(&_X, _Str->begin(), sizeof (_E));
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case codecvt_base::ok: // can fall through
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return (_Tr::to_int_type(_X));
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default:
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return (_Tr::eof()); }}}
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virtual pos_type seekoff(off_type _O, ios_base::seekdir _Way,
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ios_base::openmode =
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(ios_base::openmode)(ios_base::in | ios_base::out))
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{fpos_t _Fp;
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if (_File == 0 || fseek(_File, (long)_O, _Way) != 0
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|| fgetpos(_File, &_Fp) != 0)
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return (pos_type(_BADOFF));
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return (pos_type(_State, _Fp)); }
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virtual pos_type seekpos(pos_type _P,
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ios_base::openmode =
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(ios_base::openmode)(ios_base::in | ios_base::out))
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{fpos_t _Fp = _P.get_fpos_t();
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off_type _Off = (off_type)_P - _FPOSOFF(_Fp);
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if (_File == 0
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|| fsetpos(_File, &_Fp) != 0
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|| _Off != 0 && fseek(_File, (long)_Off, SEEK_CUR) != 0
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|| fgetpos(_File, &_Fp) != 0)
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return (pos_type(_BADOFF));
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if (_Str != 0)
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_State = _P.state(), _Str->erase();
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return (pos_type(_State, _Fp)); }
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virtual _Mysb *setbuf(_E *_S, streamsize _N)
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{return (_File == 0 || setvbuf(_File, (char *)_S,
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_IOFBF, _N * sizeof (_E)) != 0 ? 0 : this); }
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virtual int sync()
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{return (_File == 0 || 0 <= fflush(_File) ? 0 : -1); }
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void _Init(_Filet *_Fp, _Initfl _Which)
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{static _Tr::state_type _Stinit;
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_Closef = _Which == _Openfl;
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if (_Which == _Newfl)
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{_Loc.locale::~locale();
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new (&_Loc) locale;
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_Str = 0; }
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_Mysb::_Init();
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if (_Fp != 0 && !_Closef && sizeof (_E) == 1)
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{_Mysb::_Init((_E **)&_Fp->_base,
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(_E **)&_Fp->_ptr, &_Fp->_cnt,
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(_E **)&_Fp->_base, (_E **)&_Fp->_ptr,
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&_Fp->_cnt); }
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_File = _Fp;
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_State = _Stinit;
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_State0 = _Stinit;
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_Pcvt = 0; }
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void _Initcvt()
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{_Pcvt = (_Cvt *)&_USE(getloc(), _Cvt);
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_Loc = _ADDFAC(_Loc, _Pcvt);
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if (_Pcvt->always_noconv())
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_Pcvt = 0;
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if (_Str == 0)
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_Str = new string; }
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private:
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_Cvt *_Pcvt;
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_Tr::state_type _State0;
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_Tr::state_type _State;
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string *_Str;
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bool _Closef;
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locale _Loc;
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_Filet *_File;
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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_filebuf<char, char_traits<char> >;
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extern template class _CRTIMP basic_filebuf<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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// TEMPLATE CLASS basic_ifstream
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template<class _E, class _Tr = char_traits<_E> >
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class basic_ifstream : public basic_istream<_E, _Tr> {
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public:
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typedef basic_ifstream<_E, _Tr> _Myt;
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typedef basic_filebuf<_E, _Tr> _Myfb;
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basic_ifstream()
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: basic_istream<_E, _Tr>(&_Fb) {}
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explicit basic_ifstream(const char *_S,
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ios_base::openmode _M = in)
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: basic_istream<_E, _Tr>(&_Fb)
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{if (_Fb.open(_S, _M | in) == 0)
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setstate(failbit); }
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virtual ~basic_ifstream()
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{}
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_Myfb *rdbuf() const
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{return ((_Myfb *)&_Fb); }
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bool is_open() const
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{return (_Fb.is_open()); }
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void open(const char *_S, ios_base::openmode _M = in)
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{if (_Fb.open(_S, _M | in) == 0)
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setstate(failbit); }
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void open(const char *_S, ios_base::open_mode _M)
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{open(_S, (openmode)_M); }
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void close()
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{if (_Fb.close() == 0)
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setstate(failbit); }
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private:
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_Myfb _Fb;
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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_ifstream<char, char_traits<char> >;
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extern template class _CRTIMP basic_ifstream<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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// TEMPLATE CLASS basic_ofstream
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template<class _E, class _Tr = char_traits<_E> >
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class basic_ofstream : public basic_ostream<_E, _Tr> {
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public:
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typedef basic_ofstream<_E, _Tr> _Myt;
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typedef basic_filebuf<_E, _Tr> _Myfb;
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basic_ofstream()
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: basic_ostream<_E, _Tr>(&_Fb) {}
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explicit basic_ofstream(const char *_S,
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ios_base::openmode _M = out | trunc)
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: basic_ostream<_E, _Tr>(&_Fb)
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{if (_Fb.open(_S, _M | out) == 0)
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setstate(failbit); }
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virtual ~basic_ofstream()
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{}
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_Myfb *rdbuf() const
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{return ((_Myfb *)&_Fb); }
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bool is_open() const
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{return (_Fb.is_open()); }
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void open(const char *_S, ios_base::openmode _M = out | trunc)
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{if (_Fb.open(_S, _M | out) == 0)
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setstate(failbit); }
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void open(const char *_S, ios_base::open_mode _M)
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{open(_S, (openmode)_M); }
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void close()
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{if (_Fb.close() == 0)
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setstate(failbit); }
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private:
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_Myfb _Fb;
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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_ofstream<char, char_traits<char> >;
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extern template class _CRTIMP basic_ofstream<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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// TEMPLATE CLASS basic_fstream
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template<class _E, class _Tr = char_traits<_E> >
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class basic_fstream : public basic_iostream<_E, _Tr> {
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public:
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basic_fstream()
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: basic_iostream<_E, _Tr>(&_Fb) {}
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explicit basic_fstream(const char *_S,
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ios_base::openmode _M = in | out)
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: basic_iostream<_E, _Tr>(&_Fb)
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{if (_Fb.open(_S, _M) == 0)
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setstate(failbit); }
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virtual ~basic_fstream()
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{}
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basic_filebuf<_E, _Tr> *rdbuf() const
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{return ((basic_filebuf<_E, _Tr> *)&_Fb); }
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bool is_open() const
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{return (_Fb.is_open()); }
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void open(const char *_S, ios_base::openmode _M = in | out)
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{if (_Fb.open(_S, _M) == 0)
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setstate(failbit); }
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void open(const char *_S, ios_base::open_mode _M)
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{open(_S, (openmode)_M); }
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void close()
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{if (_Fb.close() == 0)
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setstate(failbit); }
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private:
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basic_filebuf<_E, _Tr> _Fb;
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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_fstream<char, char_traits<char> >;
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extern template class _CRTIMP basic_fstream<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 /* _FSTREAM_ */
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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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