ostream1.cpp

C标准库源代码

/***
* ostream1.cpp - definitions for ostream class non-core member functions
*
*       Copyright (c) 1991-1997, Microsoft Corporation.  All rights reserved.
*
*Purpose:
*       Contains the non-core member function definitions for ostream class.
*
*******************************************************************************/

#include <cruntime.h>
#include <internal.h>
#include <iostream.h>
#pragma hdrstop

ostream& ostream::seekp(streampos _strmp)
{
    lockbuf();

    if (bp->seekpos(_strmp, ios::out)==EOF)
        clear(state | failbit);

    unlockbuf();
    return(*this);
}

ostream& ostream::seekp(streamoff _strmf, seek_dir _sd)
{
    lockbuf();

    if (bp->seekoff(_strmf, _sd, ios::out)==EOF)
        clear(state | failbit);

    unlockbuf();
    return(*this);
}

streampos ostream::tellp()
{
    streampos retval;
    lockbuf();

    if ((retval=bp->seekoff(streamoff(0), ios::cur, ios::out))==EOF)
        clear(state | failbit);

    unlockbuf();
    return(retval);
}

ostream& ostream::operator<<(streambuf * instm)
{
    int c;
    if (opfx())
        {
        while ((c=instm->sbumpc())!=EOF)
            if (bp->sputc(c) == EOF)
                {
                state |= failbit;
                break;
                }
        osfx();
        }
    return *this;
}