struct result_buf {
	unsigned long array[24*1024*1024];
	int len;
};

struct result_buf rbuf;

int read(int fd, void *buf, unsigned long len);
void *malloc(unsigned long);
long strlen(char *);
int open(char *, int flags, long mode);
int printf(char *, ...);
void exit(int);

void str_search(char *h, int hlen, char *n, int nlen)
{
	int i;
	for (i = 0; i < hlen - nlen; ++i) {
		int j;
		for (j = 0; j < nlen; ++j) {
			if (h[i + j] != n[j])
				break;
		}
		if (j == nlen)
			rbuf.array[rbuf.len++] = i;
	}
}

void *read_file(int fd, int *len)
{
	int size = 1500 * 1024 * 1024;
	unsigned char *arr = malloc(size);
	int i;
	for (i = 0; ;) {
		int rd = read(fd, arr + i, size - i);
		if (rd < 0)
			exit(2);
		if (rd == 0)
			break;
		i += rd;
	}

	*len = i;
	return arr;
}

int main(int argc, char **argv)
{
	int i, slen;
	long sum = 0;
	int fd;
	char *buf;
	char *needle = argv[2];

	fd = open(argv[1], 0, 0);
	if (fd == -1)
		return 1;
	buf = read_file(fd, &slen);
	printf("len: %d\n", slen);

	str_search(buf, slen, needle, strlen(needle));

	for (i = 0; i < rbuf.len; ++i)
		sum += rbuf.array[i];
	printf("%ld\n", sum);

	return 0;
}