#ifndef _TRUNC_H_
#define _TRUNC_H_

#include "hmac.h"

#define TO_LITTLE_ENDIAN64(x)   (x & 0xFF00000000000000ul)>>(7*8) |\
                                (x & 0x00FF000000000000ul)>>(5*8) |\
                                (x & 0x0000FF0000000000ul)>>(3*8) |\
                                (x & 0x000000FF00000000ul)>>(1*8) |\
                                (x & 0x00000000FF000000ul)<<(1*8) |\
                                (x & 0x0000000000FF0000ul)<<(3*8) |\
                                (x & 0x000000000000FF00ul)<<(5*8) |\
                                (x & 0x00000000000000FFul)<<(7*8) 

int32_t get_otp(uint8_t* hmac, uint8_t digits);
int32_t get_otp_from_cnt(uint64_t cnt, uint8_t digits, uint8_t* secret, uint8_t sec_len);

#endif