You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
142 lines
4.4 KiB
142 lines
4.4 KiB
/***
|
|
*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
|