doasku

0 #ifndef DOASKU_REF_HPP

1 #define DOASKU_REF_HPP

2

3 #include <array>

4 #include <cstdint>

5 #include <utility>

6 #include <vector>

7

8 class ref

9 {

10 public:

11 using change_t = std::tuple<uint8_t, uint16_t>;

12 using changes_t = std::vector<change_t>;

13

14 uint16_t get(uint8_t field) const { return m_value.at(field); }

15 uint16_t get_ref(uint8_t value) const { return m_ref.at(value); }

16 uint16_t get_value(uint8_t field) const { return m_res.at(field); }

17

18 void clear(uint8_t field, uint8_t value);

19 void set(uint8_t field, uint8_t value);

20

21 changes_t get_hidden_singles() const;

22 changes_t get_naked_singles() const;

23

24 auto get_hidden_pairs() const { return get_hidden(2); }

25 auto get_hidden_triplets() const { return get_hidden(3); }

26 auto get_hidden_quads() const { return get_hidden(4); }

27

28 auto get_naked_pairs() const { return get_naked(2); }

29 auto get_naked_triplets() const { return get_naked(3); }

30 auto get_naked_quads() const { return get_naked(4); }

31

32 auto get_pointing_row() const { return get_pointing(0x7, 0); }

33 auto get_pointing_col() const { return get_pointing(0x49, 1); }

34

35 private:

36 changes_t get_naked(uint8_t number) const;

37 changes_t get_hidden(uint8_t number) const;

38 changes_t get_pointing(uint16_t mask, size_t seen) const;

39

40 bool get_hidden(changes_t& res,

41 uint8_t orig,

42 uint8_t number,

43 uint8_t first,

44 uint16_t val,

45 uint16_t mask) const;

46

47 bool get_naked(changes_t& res,

48 uint8_t orig,

49 uint8_t number,

50 uint8_t first,

51 uint16_t val) const;

52

53 static constexpr const std::int64_t mask_field = (1U << 9U) - 1;

54 static constexpr const std::int64_t mask_value = 0x201008040201;

55

56 std::array<uint16_t, 9> m_value = {mask_field,

57 mask_field,

58 mask_field,

59 mask_field,

60 mask_field,

61 mask_field,

62 mask_field,

63 mask_field,

64 mask_field};

65

66 std::array<uint16_t, 9> m_ref = {mask_field,

67 mask_field,

68 mask_field,

69 mask_field,

70 mask_field,

71 mask_field,

72 mask_field,

73 mask_field,

74 mask_field};

75

76 std::array<uint16_t, 9> m_res = {0};

77

78 mutable std::array<uint16_t, 4> m_seen_hidden = {0};

79 mutable std::array<uint16_t, 4> m_seen_naked = {0};

80 mutable std::array<uint16_t, 2> m_seen_point = {0};

81 };

82

83 #endif