#include "NodeLinkCommon.h"
#include "MathHelper.h"


/**
 * 数据编码
 * 
 * @author lxz (041820 14:21:27)
 * 
 * @param slave 
 * @param dst 
 * @param src 
 * @param len 
 * 
 * @return int 
 */
int nodelink_decode(unsigned char *dst, unsigned char *src, int len) { 
    int i;
    if (len > 0) {
        i=len-1;
        if (mh_crc8_calc(src, len) == 0) {
            while(i--)
            {
              dst[i]=src[i];
            }
            return len - 1;
        }
    }
    return 0;
}
/**
 * 数据编码
 * 
 * @author lxz (041820 14:22:05)
 * 
 * @param id 
 * @param dst 
 * @param src 
 * @param len 
 * 
 * @return int 
 */
int nodelink_encode(unsigned char *dst, unsigned char *src, int len) {
    int res = 0;
    unsigned char crc = 0;
    crc = mh_crc8_calc(src, len);
    res = len + 1;
    dst[len] = crc;
    while (len--) {
        dst[len] = src[len];
    }
    return res;
}