/*******************************************************************************

	Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.

	This file is part of LibMaxsi.

	LibMaxsi 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.

	LibMaxsi 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 LibMaxsi. 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;
	}
	if ( !fp->write_func ) { errno = EBADF; return EOF; }
	if ( !fp->bufferused ) { return 0; }
	size_t written = fp->write_func(fp->buffer, 1, fp->bufferused, fp->user);
	if ( written < fp->bufferused ) { return EOF; }
	fp->bufferused = 0;
	return 0;
}