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fstream.c

by Michael L Powell last modified 2007-01-26 03:21

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/*ident	"@(#)cls4:lib/stream/fstream.c	1.5" */
/*******************************************************************************
 
C++ source for the C++ Language System, Release 3.0.  This product
is a new release of the original cfront developed in the computer
science research center of AT&T Bell Laboratories.

Copyright (c) 1993  UNIX System Laboratories, Inc.
Copyright (c) 1991, 1992 AT&T and UNIX System Laboratories, Inc.
Copyright (c) 1984, 1989, 1990 AT&T.  All Rights Reserved.

THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of AT&T and UNIX System
Laboratories, Inc.  The copyright notice above does not evidence
any actual or intended publication of such source code.

*******************************************************************************/

#include <iostream.h>
#include <fstream.h>

//static const int ios_atend = ios::ate ;
static const int ios_input = ios::in ;
static const int ios_output = ios::out ;
//static const int ios_append = ios::app ;
//static const int seek_cur = ios::cur ;
//static const int seek_end = ios::end ;
//static const int seek_beg = ios::beg ;

fstreambase::fstreambase() { init(&buf) ; }

fstreambase::fstreambase(const char* name, int mode, int prot)
{
	init(&buf) ;
	open(name,mode,prot) ;
	}

fstreambase::fstreambase(int fd) 
	: buf(fd) 
{
	init(&buf) ;
	}

fstreambase::fstreambase(int fd, char* p, int l)
	: buf(fd,p,l) 
{
	init(&buf) ;
	}

inline void fstreambase::verify(int ok)
{
	if ( ok ) clear(0) ;
	else 	  setstate(ios::failbit) ;
	}

void fstreambase::setbuf(char* p, int len) 
{
	verify(buf.setbuf(p,len) != 0 ) ;
	}

void fstreambase::open(const char* name, int mode, int prot)
{
	verify(buf.open(name,mode,prot) != 0 ) ;
	}

void fstreambase::attach(int fd ) 
{
	verify(buf.attach(fd) != 0 ) ;
	}

int fstreambase::detach() 
{
	return(buf.detach()) ;
	}

void fstreambase::close() 
{
	verify(buf.close() != (filebuf*)0 ) ;
	}

fstreambase::~fstreambase() { }

ifstream::ifstream() { }
ifstream::ifstream(const char* name, int mode, int prot)
	: fstreambase(name,mode|ios_input,prot) { }
ifstream::ifstream(int fd) : fstreambase(fd) { }
ifstream::ifstream(int fd, char* p, int l) : fstreambase(fd,p,l) { }
ifstream::~ifstream() { }

void ifstream::open(const char* name, int mode, int prot)
{
	verify(rdbuf()->open(name,mode|ios_input,prot) != (filebuf*)0 ) ;
	}

ofstream::ofstream() { }
ofstream::ofstream(const char* name, int mode, int prot)
	: fstreambase(name,mode|ios_output,prot) { }
ofstream::ofstream(int fd) : fstreambase(fd) { }
ofstream::ofstream(int fd, char* p, int l) : fstreambase(fd,p,l) { }
ofstream::~ofstream() { }
void ofstream::open(const char* name, int mode, int prot)
{
	verify(rdbuf()->open(name,mode|ios_output,prot) != (filebuf*)0 ) ;
	}

fstream::fstream() { }
fstream::fstream(const char* name, int mode, int prot)
	: fstreambase(name,mode,prot) { }
fstream::fstream(int fd) : fstreambase(fd) { }
fstream::fstream(int fd, char* p, int l) : fstreambase(fd,p,l) { }
fstream::~fstream() { }
void fstream::open(const char* name, int mode, int prot)
{
	verify(rdbuf()->open(name,mode,prot) != (filebuf*)0 ) ;
	}
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