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Annotation of researchv10no/cmd/cfront/libC/oiostream/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                      6:         THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T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: static char cinbuf[STREAMBUFSIZE];
                     24: static char coutbuf[STREAMBUFSIZE];
                     25: 
                     26: istream_withassign cin ;
                     27: ostream_withassign cout ;
                     28: ostream_withassign cerr ;
                     29: ostream_withassign clog ;
                     30: 
                     31:        // The value of Iostream_init::stdstatus describes the
                     32:        // The std stream variables
                     33: 
                     34:        // 0 means istream::stdin, ostream::stdout, ostream::stderr, and
                     35:        //      ostream::stdlog are unitialized
                     36:        // 1 means they are initialized to filebufs
                     37:        // 2 means they are initialized to stdiobufs
                     38: 
                     39: Iostream_init::Iostream_init() 
                     40: {
                     41:        ++initcount ;
                     42:        if ( initcount > 1 ) return ;
                     43: 
                     44:        // Be careful.  Initialization occurs before constructors
                     45:        // of the standard streams are called.
                     46:        new (&cin) istream_withassign ;
                     47:        new (&cout) ostream_withassign ;
                     48:        new (&cerr) ostream_withassign ;
                     49:        new (&clog) ostream_withassign ;
                     50:        cin = new filebuf(0,cinbuf,sizeof(cinbuf)) ;
                     51:        cout = new filebuf(1,coutbuf,sizeof(coutbuf)) ;
                     52:        cerr = new filebuf(2,0,0) ;
                     53:        clog = new filebuf(2) ;
                     54: 
                     55:        cin.setf(ios::skipws,ios::skipws) ;
                     56:        cin.tie(&cout) ;
                     57:        cerr.tie(&cout) ;
                     58:        clog.tie(&cout) ;
                     59:        stdstatus = 1 ;
                     60:        }
                     61: 
                     62: Iostream_init::~Iostream_init()
                     63: {
                     64:        --initcount ;
                     65:        if ( initcount > 0 ) return ;
                     66:        cout.flush() ;
                     67:        cerr.flush() ;
                     68:        clog.flush() ;
                     69:        }

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