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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
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