istgstf.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 84 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
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*  ========================================================================
*
* Description:
*
****************************************************************************/

#ifdef __SW_FH
#include "iost.h"
#else
#include "variety.h"
#include <iostream>
#include <streambu>
#endif
#include "lock.h"

namespace std {


  // Extract characters from our streambuf and store them into the
  // specified streambuf.

  istream &istream::get( streambuf &tgt_sb, char delim ) {
    streambuf *src_sb;
    int        c;
    int        offset;

    __lock_it( __i_lock );
    if( !ipfx( 1 ) ) {
        __last_read_length = 0;
        return( *this );
    }
    offset = 0;
    src_sb = rdbuf();
    __lock_it( __lock_first( src_sb->__b_lock, tgt_sb.__b_lock ) );
    __lock_it( __lock_second( src_sb->__b_lock, tgt_sb.__b_lock ) );
    for( ;; ) {
        c = src_sb->speekc();
        if( c == EOF ) {
            if( offset == 0 ) {
                setstate( ios::eofbit );
            }
            break;
        }
        if( c == delim ) {
            break;
        }
        ++offset;
        if( tgt_sb.sputc( c ) == EOF ) {
            setstate( ios::failbit );
            break;
        }
        src_sb->sbumpc();
    }
    __last_read_length = offset;
    isfx();
    return( *this );
  }

}