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sortix--sortix/libc/fflush.cpp

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
fflush.cpp
Flushes a FILE.
*******************************************************************************/
#include <stdio.h>
#include <errno.h>
extern "C" int fflush(FILE* fp)
{
if ( !fp )
{
int result = 0;
for ( fp = _firstfile; fp; fp = fp->next ) { result |= fflush(fp); }
return result;
}
int mode = fp->flags & (_FILE_LAST_READ | _FILE_LAST_WRITE);
if ( (mode & _FILE_LAST_READ) && fflush_stop_reading(fp) == EOF )
return EOF;
if ( (mode & _FILE_LAST_WRITE) && fflush_stop_writing(fp) == EOF )
return EOF;
fp->flags |= mode;
return 0;
}