gc_n64_usb-v3/tools/memmem.c

/*	gc_n64_usb : Gamecube or N64 controller to USB adapter firmware
	Copyright (C) 2007-2015  Raphael Assenat <raph@raphnet.net>

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 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 General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>

void *memmem(const void *haystack, size_t haystack_len,
		const void *needle, size_t needle_len)
{
	int i;
	if (needle_len > haystack_len)
		return NULL;

	for (i=0; i<haystack_len; i++) {
		if (!memcmp(haystack +i, needle, needle_len))
			return haystack + i;
	}
	return NULL;
}