uclibc-ng/libc/stdlib/malloc/calloc.c

/* calloc for uClibc
 *
 * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Library General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program 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 Library General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this program; see the file COPYING.LIB.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>
#include <string.h>
#include <errno.h>


void * calloc(size_t nmemb, size_t lsize)
{
	void *result;
	size_t size=lsize * nmemb;

	/* guard vs integer overflow, but allow nmemb
	 * to fall through and call malloc(0) */
	if (nmemb && lsize != (size / nmemb)) {
		__set_errno(ENOMEM);
		return NULL;
	}
	if ((result=malloc(size)) != NULL) {
		memset(result, 0, size);
	}
	return result;
}