#include  <stdio.h>
#include  "aplinks.h"


int chain_chk(int sec_num,
				unsigned char *fat_buffer[], unsigned char *data_buffer[])
{
	if(sec_num == 0){
		return 0;
	}
	
	while(sec_num != 0xff0){
		if(data_buffer[sec_num - 2] == NULL){
			return -1;
		}
		sec_num = get_fat(sec_num, fat_buffer);
	}
	
	return 0;
}