void memsetEX(unsigned char *dst,unsigned char val,unsigned char len);
void memcpyEX(unsigned char *dst,unsigned char *src,unsigned char len);
unsigned char memcmpEX(unsigned char *dst,unsigned char *src,unsigned char len);
unsigned char strlenEX(char* s);
void strcpyEX(char *dst,char *src);
void strcatEX(char *dst,char *src);
unsigned char strcmpEX(char *dst,char *src);
char* strchrEX(char* str, char c);
char* itoaEX(int num,char* str,int radix);