/***
*fstream.h - definitions/declarations for filebuf and fstream classes
*
* Copyright (c) 1991-1993, 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>
// C4505: "unreferenced local function has been removed"
#pragma warning(disable:4505) // disable C4505 warning
// #pragma warning(default:4505) // use this to reenable, if desired
// C4103 : "used #pragma pack to change alignment"
#pragma warning(disable:4103) // disable C4103 warning
// #pragma warning(default:4103) // use this to reenable, if desired
// Force word packing to avoid possible -Zp override
#pragma pack(4)
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_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 *, 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 *, int, int = filebuf::openprot);
filebuf* close();
int setmode(int = filebuf::text);
virtual int overflow(int=EOF);
virtual int underflow();
virtual streambuf* setbuf(char *, 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 *, int =ios::in, int = filebuf::openprot);
ifstream(filedesc);
ifstream(filedesc, char *, int);
~ifstream();
streambuf * setbuf(char *, 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 *, 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 *, int =ios::out, int = filebuf::openprot);
ofstream(filedesc);
ofstream(filedesc, char *, int);
~ofstream();
streambuf * setbuf(char *, 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 *, 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 *, int, int = filebuf::openprot);
fstream(filedesc);
fstream(filedesc, char *, int);
~fstream();
streambuf * setbuf(char *, 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 *, 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 // !_INC_FSTREAM
