99 lines
2 KiB
C++
99 lines
2 KiB
C++
/***
|
|
* istream1.cpp - non-core definitions for istream & istream_withassign classes
|
|
*
|
|
* Copyright (c) 1991-2001, 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.
|
|
* 06-14-95 CFW Comment cleanup.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#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
|
|
|
|
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);
|
|
}
|