mirror of https://github.com/tongzx/nt5src
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.
157 lines
4.1 KiB
157 lines
4.1 KiB
/***
|
|
*fstream.h - definitions/declarations for filebuf and fstream classes
|
|
*
|
|
* Copyright (c) 1991-1994, 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
|
|
|
|
|
|
/* Define _CRTIMP */
|
|
|
|
#ifndef _CRTIMP
|
|
#ifdef _NTSDK
|
|
/* definition compatible with NT SDK */
|
|
#define _CRTIMP
|
|
#else /* ndef _NTSDK */
|
|
/* current definition */
|
|
#ifdef _DLL
|
|
#define _CRTIMP __declspec(dllimport)
|
|
#else /* ndef _DLL */
|
|
#define _CRTIMP
|
|
#endif /* _DLL */
|
|
#endif /* _NTSDK */
|
|
#endif /* _CRTIMP */
|
|
|
|
|
|
#include <iostream.h>
|
|
|
|
#ifdef _MSC_VER
|
|
// C4505: "unreferenced local function has been removed"
|
|
#pragma warning(disable:4505) // disable C4505 warning
|
|
// #pragma warning(default:4505) // use this to reenable, if desired
|
|
|
|
// Force word packing to avoid possible -Zp override
|
|
#pragma pack(push,4)
|
|
#endif // _MSC_VER
|
|
|
|
typedef int filedesc;
|
|
|
|
class _CRTIMP 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 _CRTIMP 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 _CRTIMP 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 _CRTIMP 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; }
|
|
|
|
#ifdef _MSC_VER
|
|
// Restore previous packing
|
|
#pragma pack(pop)
|
|
#endif // _MSC_VER
|
|
|
|
#endif // !_INC_FSTREAM
|