142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
|
/***
|
||
|
|
*fstream.h - definitions/declarations for filebuf and fstream classes
|
||
|
|
*
|
||
|
|
* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* This file defines the classes, values, macros, and functions
|
||
|
|
* used by the filebuf and fstream classes.
|
||
|
|
* [AT&T C++]
|
||
|
|
*
|
||
|
|
****/
|
||
|
|
|
||
|
|
#ifndef _INC_FSTREAM
|
||
|
|
#define _INC_FSTREAM
|
||
|
|
|
||
|
|
#include <iostream.h>
|
||
|
|
|
||
|
|
// 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
|
||
|
|
|
||
|
|
#ifdef M_I86HM
|
||
|
|
#define _HFAR_ __far
|
||
|
|
#else
|
||
|
|
#define _HFAR_
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef int filedesc;
|
||
|
|
|
||
|
|
class filebuf : public streambuf {
|
||
|
|
public:
|
||
|
|
static const int openprot; // default share/prot mode for open
|
||
|
|
|
||
|
|
// optional share values for 3rd argument (prot) of open or constructor
|
||
|
|
static const int sh_compat; // compatibility share mode
|
||
|
|
static const int sh_none; // exclusive mode no sharing
|
||
|
|
static const int sh_read; // allow read sharing
|
||
|
|
static const int sh_write; // allow write sharing
|
||
|
|
// use (sh_read | sh_write) to allow both read and write sharing
|
||
|
|
|
||
|
|
// options for setmode member function
|
||
|
|
static const int binary;
|
||
|
|
static const int text;
|
||
|
|
|
||
|
|
filebuf();
|
||
|
|
filebuf(filedesc);
|
||
|
|
filebuf(filedesc, char _HFAR_ *, int);
|
||
|
|
~filebuf();
|
||
|
|
|
||
|
|
filebuf* attach(filedesc);
|
||
|
|
filedesc fd() const { return (x_fd==-1) ? EOF : x_fd; }
|
||
|
|
int is_open() const { return (x_fd!=-1); }
|
||
|
|
filebuf* open(const char _HFAR_ *, int, int = filebuf::openprot);
|
||
|
|
filebuf* close();
|
||
|
|
int setmode(int = filebuf::text);
|
||
|
|
|
||
|
|
virtual int overflow(int=EOF);
|
||
|
|
virtual int underflow();
|
||
|
|
|
||
|
|
virtual streambuf* setbuf(char _HFAR_ *, int);
|
||
|
|
virtual streampos seekoff(streamoff, ios::seek_dir, int);
|
||
|
|
// virtual streampos seekpos(streampos, int);
|
||
|
|
virtual int sync();
|
||
|
|
|
||
|
|
private:
|
||
|
|
filedesc x_fd;
|
||
|
|
int x_fOpened;
|
||
|
|
};
|
||
|
|
|
||
|
|
class ifstream : public istream {
|
||
|
|
public:
|
||
|
|
ifstream();
|
||
|
|
ifstream(const char _HFAR_ *, int =ios::in, int = filebuf::openprot);
|
||
|
|
ifstream(filedesc);
|
||
|
|
ifstream(filedesc, char _HFAR_ *, int);
|
||
|
|
~ifstream();
|
||
|
|
|
||
|
|
streambuf * setbuf(char _HFAR_ *, int);
|
||
|
|
filebuf* rdbuf() const { return (filebuf*) ios::rdbuf(); }
|
||
|
|
|
||
|
|
void attach(filedesc);
|
||
|
|
filedesc fd() const { return rdbuf()->fd(); }
|
||
|
|
|
||
|
|
int is_open() const { return rdbuf()->is_open(); }
|
||
|
|
void open(const char _HFAR_ *, int =ios::in, int = filebuf::openprot);
|
||
|
|
void close();
|
||
|
|
int setmode(int mode = filebuf::text) { return rdbuf()->setmode(mode); }
|
||
|
|
};
|
||
|
|
|
||
|
|
class ofstream : public ostream {
|
||
|
|
public:
|
||
|
|
ofstream();
|
||
|
|
ofstream(const char _HFAR_ *, int =ios::out, int = filebuf::openprot);
|
||
|
|
ofstream(filedesc);
|
||
|
|
ofstream(filedesc, char _HFAR_ *, int);
|
||
|
|
~ofstream();
|
||
|
|
|
||
|
|
streambuf * setbuf(char _HFAR_ *, int);
|
||
|
|
filebuf* rdbuf() const { return (filebuf*) ios::rdbuf(); }
|
||
|
|
|
||
|
|
void attach(filedesc);
|
||
|
|
filedesc fd() const { return rdbuf()->fd(); }
|
||
|
|
|
||
|
|
int is_open() const { return rdbuf()->is_open(); }
|
||
|
|
void open(const char _HFAR_ *, int =ios::out, int = filebuf::openprot);
|
||
|
|
void close();
|
||
|
|
int setmode(int mode = filebuf::text) { return rdbuf()->setmode(mode); }
|
||
|
|
};
|
||
|
|
|
||
|
|
class fstream : public iostream {
|
||
|
|
public:
|
||
|
|
fstream();
|
||
|
|
fstream(const char _HFAR_ *, int, int = filebuf::openprot);
|
||
|
|
fstream(filedesc);
|
||
|
|
fstream(filedesc, char _HFAR_ *, int);
|
||
|
|
~fstream();
|
||
|
|
|
||
|
|
streambuf * setbuf(char _HFAR_ *, int);
|
||
|
|
filebuf* rdbuf() const { return (filebuf*) ostream::rdbuf(); }
|
||
|
|
|
||
|
|
void attach(filedesc);
|
||
|
|
filedesc fd() const { return rdbuf()->fd(); }
|
||
|
|
|
||
|
|
int is_open() const { return rdbuf()->is_open(); }
|
||
|
|
void open(const char _HFAR_ *, int, int = filebuf::openprot);
|
||
|
|
void close();
|
||
|
|
int setmode(int mode = filebuf::text) { return rdbuf()->setmode(mode); }
|
||
|
|
};
|
||
|
|
|
||
|
|
// manipulators to dynamically change file access mode (filebufs only)
|
||
|
|
inline ios& binary(ios& _fstrm) \
|
||
|
|
{ ((filebuf*)_fstrm.rdbuf())->setmode(filebuf::binary); return _fstrm; }
|
||
|
|
inline ios& text(ios& _fstrm) \
|
||
|
|
{ ((filebuf*)_fstrm.rdbuf())->setmode(filebuf::text); return _fstrm; }
|
||
|
|
|
||
|
|
// Restore default packing
|
||
|
|
#pragma pack()
|
||
|
|
|
||
|
|
#endif
|