#include <stdint.h>
#include <stdio.h>

#define BITVAL(code, off) ((code & (1 << off)) >> off)

void decode(uint32_t rawcode) {
  // Lot:3:6
  // bit3->bit3, bit4->bit2, bit5->bit1, bit6->bit0
  uint32_t lot = 0;
  lot          = BITVAL(rawcode, 3) << 3 | BITVAL(rawcode, 4) << 2 | BITVAL(rawcode, 5) << 1 | BITVAL(rawcode, 6) << 0;

  // =(bit1)*2^6+(bit2)*2^5+(bit11)*2^4+(bit10)*2^0+(bit9)*2^1+(bit8)*2^2+(bit7)*2^3

  uint32_t item = 0;
  item          = (BITVAL(rawcode, 1) << 6)  //
         | (BITVAL(rawcode, 2) << 5)         //
         | (BITVAL(rawcode, 11) << 4)        //
         | (BITVAL(rawcode, 10) << 0)        //
         | (BITVAL(rawcode, 9) << 1)         //
         | (BITVAL(rawcode, 8) << 2)         //
         | (BITVAL(rawcode, 7) << 3);

  printf(" item-lot: %d-%d\n", item, lot);
}
int main(int argc, char const *argv[]) {
  decode(0x48C1);  // 0x48C1 100 1000 1100 0001 ,expect24-1
  decode(0x443B);  // 0x443B 100 0100 0011 1011 ,expect65-14
  decode(0x45c1);  // 0x443B 100 0100 0011 1011 ,expect65-14

  return 0;
}