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- /***
- *streamb.h - definitions/declarations for the streambuf class
- *
- * Copyright (c) 1990-1992, Microsoft Corporation. All rights reserved.
- *
- *Purpose:
- * This file defines the classes, values, macros, and functions
- * used by the streambuf class.
- * [AT&T C++]
- *
- ****/
-
- #ifndef _INC_STREAMB
- #define _INC_STREAMB
-
-
- #ifdef M_I86HM
- #define _HFAR_ __far
- #else
- #define _HFAR_
- #endif
-
- #ifndef NULL
- #define NULL 0
- #endif
-
- #ifndef EOF
- #define EOF (-1)
- #endif
-
- // Force word packing to avoid possible -Zp override
- #pragma pack(2)
-
- #pragma warning(disable:4505) // disable unwanted /W4 warning
- // #pragma warning(default:4505) // use this to reenable, if necessary
-
- typedef long streampos, streamoff;
-
- class streambuf {
- public:
-
- virtual ~streambuf();
-
- inline int in_avail() const;
- inline int out_waiting() const;
- int sgetc();
- int snextc();
- int sbumpc();
- void stossc();
-
- inline int sputbackc(char);
-
- inline int sputc(int);
- inline int sputn(const char _HFAR_ *,int);
- inline int sgetn(char _HFAR_ *,int);
-
- virtual int sync();
-
- // enum seek_dir { beg=0, cur=1, end=2 }; // CONSIDER: needed ???
-
- virtual streambuf* setbuf(char _HFAR_ *, int);
- virtual streampos seekoff(streamoff,ios::seek_dir,int =ios::in|ios::out);
- virtual streampos seekpos(streampos,int =ios::in|ios::out);
-
- virtual int xsputn(const char _HFAR_ *,int);
- virtual int xsgetn(char _HFAR_ *,int);
-
- virtual int overflow(int =EOF) = 0; // pure virtual function
- virtual int underflow() = 0; // pure virtual function
-
- virtual int pbackfail(int);
-
- void dbp();
-
- protected:
- streambuf();
- streambuf(char _HFAR_ *,int);
-
- inline char _HFAR_ * base() const;
- inline char _HFAR_ * ebuf() const;
- inline char _HFAR_ * pbase() const;
- inline char _HFAR_ * pptr() const;
- inline char _HFAR_ * epptr() const;
- inline char _HFAR_ * eback() const;
- inline char _HFAR_ * gptr() const;
- inline char _HFAR_ * egptr() const;
- inline int blen() const;
- inline void setp(char _HFAR_ *,char _HFAR_ *);
- inline void setg(char _HFAR_ *,char _HFAR_ *,char _HFAR_ *);
- inline void pbump(int);
- inline void gbump(int);
-
- void setb(char _HFAR_ *,char _HFAR_ *,int =0);
- inline int unbuffered() const;
- inline void unbuffered(int);
- int allocate();
- virtual int doallocate();
-
- private:
- int _fAlloc;
- int _fUnbuf;
- int x_lastc;
- char _HFAR_ * _base;
- char _HFAR_ * _ebuf;
- char _HFAR_ * _pbase;
- char _HFAR_ * _pptr;
- char _HFAR_ * _epptr;
- char _HFAR_ * _eback;
- char _HFAR_ * _gptr;
- char _HFAR_ * _egptr;
- };
-
- inline int streambuf::in_avail() const { return (gptr()<_egptr) ? (_egptr-gptr()) : 0; }
- inline int streambuf::out_waiting() const { return (_pptr>=_pbase) ? (_pptr-_pbase) : 0; }
-
- inline int streambuf::sputbackc(char _c){ return (_eback<gptr()) ? *(--_gptr)=_c : pbackfail(_c); }
-
- inline int streambuf::sputc(int _i){ return (_pptr<_epptr) ? (unsigned char)(*(_pptr++)=(char)_i) : overflow(_i); }
-
- inline int streambuf::sputn(const char _HFAR_ * _str,int _n) { return xsputn(_str, _n); }
- inline int streambuf::sgetn(char _HFAR_ * _str,int _n) { return xsgetn(_str, _n); }
-
- inline char _HFAR_ * streambuf::base() const { return _base; }
- inline char _HFAR_ * streambuf::ebuf() const { return _ebuf; }
- inline int streambuf::blen() const {return ((_ebuf > _base) ? (_ebuf-_base) : 0); }
- inline char _HFAR_ * streambuf::pbase() const { return _pbase; }
- inline char _HFAR_ * streambuf::pptr() const { return _pptr; }
- inline char _HFAR_ * streambuf::epptr() const { return _epptr; }
- inline char _HFAR_ * streambuf::eback() const { return _eback; }
- inline char _HFAR_ * streambuf::gptr() const { return _gptr; }
- inline char _HFAR_ * streambuf::egptr() const { return _egptr; }
- inline void streambuf::gbump(int n) { if (_egptr) _gptr += n; }
- inline void streambuf::pbump(int n) { if (_epptr) _pptr += n; }
- inline void streambuf::setg(char _HFAR_ * eb, char _HFAR_ * g, char _HFAR_ * eg) {_eback=eb; _gptr=g; _egptr=eg; x_lastc=EOF; }
- inline void streambuf::setp(char _HFAR_ * p, char _HFAR_ * ep) {_pptr=_pbase=p; _epptr=ep; }
- inline int streambuf::unbuffered() const { return _fUnbuf; }
- inline void streambuf::unbuffered(int fUnbuf) { _fUnbuf = fUnbuf; }
-
- // Restore default packing
- #pragma pack()
-
- #endif
-