cstreams.c
Click here to get the file
Size
1.9 kB
-
File type
text/plain
File contents
/*ident "@(#)cls4:lib/stream/cstreams.c 1.3" */
/*******************************************************************************
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THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of AT&T and UNIX System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>
#include <new.h>
#include "streamdefs.h"
int Iostream_init::stdstatus = 0 ;
int Iostream_init::initcount = 0 ;
istream_withassign cin ;
ostream_withassign cout ;
ostream_withassign cerr ;
ostream_withassign clog ;
// The value of Iostream_init::stdstatus describes the
// The std stream variables
// 0 means istream::stdin, ostream::stdout, ostream::stderr, and
// ostream::stdlog are unitialized
// 1 means they are initialized to filebufs
// 2 means they are initialized to stdiobufs
Iostream_init::Iostream_init()
{
++initcount ;
if ( initcount > 1 ) return ;
// Be careful. Initialization occurs before constructors
// of the standard streams are called.
new (&cin) istream_withassign ;
new (&cout) ostream_withassign ;
new (&cerr) ostream_withassign ;
new (&clog) ostream_withassign ;
cin = new filebuf(0) ;
cout = new filebuf(1) ;
cerr = new filebuf(2) ;
clog = new filebuf(2) ;
cin.setf(~0L,ios::skipws) ;
cerr.setf(~0L,ios::unitbuf) ;
cin.tie(&cout) ;
cerr.tie(&cout) ;
clog.tie(&cout) ;
stdstatus = 1 ;
}
Iostream_init::~Iostream_init()
{
--initcount ;
if ( initcount > 0 ) return ;
cout.flush() ;
cerr.flush() ;
clog.flush() ;
}