#ifndef _KLOTSKI_H_
#define _KLOTSKI_H_

#include <cstdint>

#define B_space 0x0
#define B_fill  0x7
#define B_1x2   0x1
#define B_2x1   0x2
#define B_1x1   0x3
#define B_2x2   0x4

#define C_1x1 uint64_t(0x3)
#define C_1x2 uint64_t(0x39)
#define C_2x1 uint64_t(0x7002)
#define C_2x2 uint64_t(0x3F03C)

#define F_1x1 uint64_t(0x7)
#define F_1x2 uint64_t(0x3F)
#define F_2x1 uint64_t(0x7007)
#define F_2x2 uint64_t(0x3F03F)

uint64_t compact_code(uint64_t code);
uint64_t extract_code(uint64_t code);

#endif

/*

  uint64_t -> 0000 + [xxx] * 20

  2x2  2x1  1x2  1x1
  # #   #   # #  #
  # #   #

  00 01 02 03
  04 05 06 07
  08 09 10 11
  12 13 14 15
  16 17 18 19

  x1 (%4) => 0 1 2 3
  x3 (%4) => 0 3 2 1

*/

/*
======================================================

 1x1 -> 011 000 000 000 -> 0000 0000 0011 -> 0x3

 1x2 -> 001 111 000 000 -> 0000 0011 1001 -> 0x39

 2x1 -> 010 000 000 000 -> 0000 0000 0010 -> 0x7002
        111 000 000 000 -> 0000 0000 0111

 2x2 -> 100 111 000 000 -> 0000 0011 1100 -> 0x3F03C
        111 111 000 000 -> 0000 0011 1111

======================================================

 1x1 -> 111 000 000 000 -> 0000 0000 0111 -> 0x7

 1x2 -> 111 111 000 000 -> 0000 0011 1111 -> 0x3F

 2x1 -> 111 000 000 000 -> 0000 0000 0111 -> 0x7007
        111 000 000 000 -> 0000 0000 0111

 2x2 -> 111 111 000 000 -> 0000 0011 1111 -> 0x3F03F
        111 111 000 000 -> 0000 0011 1111

======================================================
*/