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/* ****************************************************************************
 * stdio/read.c -- Read from a stream.
 * Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
 *
 * This file is part of libcarrot.
 * libcarrot 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 3.0 of the License,
 * or (at your option) any later version.
 *
 * libcarrot 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 libcarrot; if not, see <http://www.gnu.org/licenses/>.
 * ************************************************************************* */
#include "stdio.h"

/**
 *	fread:
 *	Read from a FILE stream.
 *
 *	@arg	ptr		the reception buffer.
 *	@arg	size	the size of an element.
 *	@arg	nmemb	the number of elements to receive.
 *	@arg	stream	the stream.
 *	@return			the number of received elements.
 */

size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
	long rd;

	/* check if we can read */
	if (!stream->read) return (0);

	/* read */
	rd = (*stream->read)(stream->cookie, ptr, size * nmemb);
	if (rd < 0) return (0);

	/* update offset and return */
	stream->offset += rd;
	return (rd / size);
}