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FSTREAM.H
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C/C++ Source or Header
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1996-07-24
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6KB
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206 lines
//
// fstream.h File I/O streams
//
// Copyright by WATCOM International Corp. 1988-1996. All rights reserved.
//
#ifndef _FSTREAM_H_INCLUDED
#define _FSTREAM_H_INCLUDED
#ifndef __cplusplus
#error fstream.h is for use with C++
#endif
#ifndef _COMDEF_H_INCLUDED
#include <_comdef.h>
#endif
#ifndef _IOSTREAM_H_INCLUDED
#include <iostream.h>
#endif
// POSIX file handle:
typedef int filedesc;
// **************************** FILEBUF **************************************
#if defined(_M_IX86)
#pragma pack(__push,1);
#else
#pragma pack(__push,8);
#endif
class _WPRTLINK filebuf : public streambuf {
public:
static int const openprot; // default file protection
enum sh_mode { // sharing mode
sh_compat = 0x0000, // - compatibility mode
sh_read = 0x1000, // - allow others to read
sh_write = 0x2000, // - allow others to write
sh_none = 0x4000 // - do not allow others to read or write
};
typedef int shmode;
filebuf();
filebuf( filedesc __fd );
filebuf( filedesc __fd, char *__buf, int __len );
~filebuf();
int is_open() const;
filedesc fd() const;
filebuf *attach( filedesc __fd );
filebuf *open( char const *__name,
ios::openmode __mode,
int __prot = openprot );
filebuf *close();
virtual int pbackfail( int __c );
virtual int overflow( int = EOF );
virtual int underflow();
virtual streambuf *setbuf( char *__buf, int __len );
virtual streampos seekoff( streamoff __offset,
ios::seekdir __direction,
ios::openmode __ignored );
virtual int sync();
private:
filedesc __file_handle;
ios::openmode __file_mode;
char __unbuffered_get_area[ DEFAULT_PUTBACK_SIZE+1 ];
char __attached : 1;
int : 0;
};
#pragma pack(__pop);
inline filedesc filebuf::fd() const {
return( __file_handle );
}
inline int filebuf::is_open() const {
return( __file_handle != EOF );
}
// **************************** FSTREAMBASE **********************************
#if defined(_M_IX86)
#pragma pack(__push,1);
#else
#pragma pack(__push,8);
#endif
class _WPRTLINK fstreambase : virtual public ios {
public:
int is_open() const;
filedesc fd() const;
void attach( filedesc __fd );
void open( char const *__name,
ios::openmode __mode,
int __prot = filebuf::openprot );
void close();
filebuf *rdbuf() const;
void setbuf( char *__buf, int __len );
protected:
fstreambase();
fstreambase( char const *__name,
ios::openmode __mode,
int __prot = filebuf::openprot );
fstreambase( filedesc __fd );
fstreambase( filedesc __fd, char *__buf, int __len );
~fstreambase();
private:
filebuf __flbuf;
};
#pragma pack(__pop);
inline filedesc fstreambase::fd() const {
__lock_it( __i_lock );
filebuf *__fb = rdbuf();
return( (__fb == NULL) ? EOF : __fb->fd() );
}
inline int fstreambase::is_open() const {
__lock_it( __i_lock );
filebuf *__fb = rdbuf();
return( (__fb == NULL) ? 0 : __fb->is_open() );
}
inline filebuf *fstreambase::rdbuf() const {
return( (filebuf *) ios::rdbuf() );
}
// **************************** IFSTREAM *************************************
#if defined(_M_IX86)
#pragma pack(__push,1);
#else
#pragma pack(__push,8);
#endif
class _WPRTLINK ifstream : public fstreambase, public istream {
public:
ifstream();
ifstream( char const *__name,
ios::openmode __mode = ios::in,
int __prot = filebuf::openprot );
ifstream( filedesc __fd );
ifstream( filedesc __fd, char *__buf, int __len );
~ifstream();
void open( char const *__name,
ios::openmode __mode = ios::in,
int __prot = filebuf::openprot );
};
#pragma pack(__pop);
inline void ifstream::open( char const *__n, ios::openmode __m, int __p ) {
fstreambase::open( __n, __m, __p );
}
// **************************** OFSTREAM *************************************
#if defined(_M_IX86)
#pragma pack(__push,1);
#else
#pragma pack(__push,8);
#endif
class _WPRTLINK ofstream : public fstreambase, public ostream {
public:
ofstream();
ofstream( char const *__name,
ios::openmode __mode = ios::out,
int __prot = filebuf::openprot );
ofstream( filedesc __fd );
ofstream( filedesc __fd, char *__buf, int __len );
~ofstream();
void open( char const *__name,
ios::openmode __mode = ios::out,
int __prot = filebuf::openprot );
};
#pragma pack(__pop);
inline void ofstream::open( char const *__n, ios::openmode __m, int __p ) {
fstreambase::open( __n, __m, __p );
}
// **************************** FSTREAM **************************************
#if defined(_M_IX86)
#pragma pack(__push,1);
#else
#pragma pack(__push,8);
#endif
class _WPRTLINK fstream : public fstreambase, public iostream {
public:
fstream();
fstream( char const *__name,
ios::openmode __mode = ios::in|ios::out,
int __prot = filebuf::openprot );
fstream( filedesc __fd );
fstream( filedesc __fd, char *__buf, int __len );
~fstream();
void open( char const *__name,
ios::openmode __mode = ios::in|ios::out,
int __prot = filebuf::openprot );
};
#pragma pack(__pop);
inline void fstream::open( char const *__n, ios::openmode __m, int __p ) {
fstreambase::open( __n, __m, __p );
}
#endif