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Annotation of researchv10no/cmd/cfront/libC/iostream/cstreams.c, revision 1.1.1.1

1.1       root        1: /*ident        "@(#)ctrans:lib/stream/cstreams.c       1.1.4.1" */
                      2: /**************************************************************************
                      3:                         Copyright (c) 1984 AT&T
                      4:                           All Rights Reserved   
                      5: 
                      6:         THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
                      7:         
                      8:         The copyright notice above does not evidence any        
                      9:         actual or intended publication of such source code.
                     10: 
                     11: cstreams.c:
                     12: 
                     13: *****************************************************************************/
                     14: 
                     15: #include <iostream.h>
                     16: #include <fstream.h>
                     17: #include <new.h>
                     18: #include "streamdefs.h"
                     19: 
                     20: int Iostream_init::stdstatus = 0 ;
                     21: int Iostream_init::initcount = 0 ;
                     22: 
                     23: istream_withassign cin ;
                     24: ostream_withassign cout ;
                     25: ostream_withassign cerr ;
                     26: ostream_withassign clog ;
                     27: 
                     28:        // The value of Iostream_init::stdstatus describes the
                     29:        // The std stream variables
                     30: 
                     31:        // 0 means istream::stdin, ostream::stdout, ostream::stderr, and
                     32:        //      ostream::stdlog are unitialized
                     33:        // 1 means they are initialized to filebufs
                     34:        // 2 means they are initialized to stdiobufs
                     35: 
                     36: Iostream_init::Iostream_init() 
                     37: {
                     38:        ++initcount ;
                     39:        if ( initcount > 1 ) return ;
                     40: 
                     41:        // Be careful.  Initialization occurs before constructors
                     42:        // of the standard streams are called.
                     43:        new (&cin) istream_withassign ;
                     44:        new (&cout) ostream_withassign ;
                     45:        new (&cerr) ostream_withassign ;
                     46:        new (&clog) ostream_withassign ;
                     47:        cin = new filebuf(0) ;
                     48:        cout = new filebuf(1) ;
                     49:        cerr = new filebuf(2) ;
                     50:        clog = new filebuf(2) ;
                     51: 
                     52:        cin.setf(~0L,ios::skipws) ;
                     53:        cerr.setf(~0L,ios::unitbuf) ;
                     54:        cin.tie(&cout) ;
                     55:        cerr.tie(&cout) ;
                     56:        clog.tie(&cout) ;
                     57:        stdstatus = 1 ;
                     58:        }
                     59: 
                     60: Iostream_init::~Iostream_init()
                     61: {
                     62:        --initcount ;
                     63:        if ( initcount > 0 ) return ;
                     64:        cout.flush() ;
                     65:        cerr.flush() ;
                     66:        clog.flush() ;
                     67:        }

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