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/***
* istream1.cxx - non-core definitions for istream & istream_withassign classes
*
* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Definitions of non-core member functions for istream and
* istream_withassign classes.
* [AT&T C++]
*
*Revision History:
* 09-23-91 KRS Created. Split off from istream.cxx for granularity.
* 10-07-91 KRS Increment x_gcount in get(sb).
* 10-24-91 KRS Fix istream_withassign::operator=() functions.
* 11-20-91 KRS Make operator= inline.
* 03-30-92 KRS Add multithread locking.
*
*******************************************************************************/
#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>
#include <iostream.h>
#pragma hdrstop
istream& istream::operator>>(streambuf* _sbuf)
{
int c;
if (ipfx(0))
{
while ((c=bp->sbumpc())!=EOF)
{
if (_sbuf->sputc(c)==EOF)
{
state |= ios::failbit;
}
}
isfx();
}
return *this;
}
// unformatted input functions
istream& istream::get( streambuf& sbuf, char delim)
{
int c;
if (ipfx(1)) // resets x_gcount
{
while ((c = bp->sgetc())!=delim)
{
if (c==EOF) // stop if EOF encountered
{
state |= ios::eofbit;
break;
}
bp->stossc(); // advance get pointer
x_gcount++; // and increment count
// store c into sbuf // UNDONE: is this what they meant???
if (sbuf.sputc(c)==EOF)
state |= ios::failbit;
}
isfx();
}
return *this;
}
istream& istream::seekg(streampos _strmp)
{
lockbuf();
if (bp->seekpos(_strmp, ios::in)==EOF)
{
clear(state | failbit);
}
unlockbuf();
return(*this);
}
istream& istream::seekg(streamoff _strmf, seek_dir _sd)
{
lockbuf();
if (bp->seekoff(_strmf, _sd, ios::in)==EOF)
clear(state | failbit);
unlockbuf();
return(*this);
}
streampos istream::tellg()
{
streampos retval;
lockbuf();
if ((retval=bp->seekoff(streamoff(0), ios::cur, ios::in))==EOF)
clear(state | failbit);
unlockbuf();
return(retval);
}
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