Grcov report - ipuz-symmetry.c

1

/* ipuz-symmetry.c

2

3

 * Copyright 2023 Jonathan Blandford <jrb@gnome.org>

4

5

 * This library is free software; you can redistribute it and/or

6

 * modify it under the terms of the GNU Lesser General Public

7

 * License as published by the Free Software Foundation; either

8

 * version 2.1 of the License, or (at your option) any later version.

9

10

 * This library is distributed in the hope that it will be useful,

11

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

12

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

13

 * Lesser General Public License for more details.

14

15

 * You should have received a copy of the GNU Lesser General Public

16

 * License along with this library; if not, write to the Free Software

17

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

18

19

 * SPDX-License-Identifier: (LGPL-2.1-or-later OR MIT)

20

*/

21

22

23

#include "libipuz.h"

24

#include <libipuz/ipuz-symmetry.h>

25

26

IPuzCellCoord

27

468

ipuz_symmetry_calculate (IPuzCellCoord      coord,

28

                         guint              puzzle_width,

29

                         guint              puzzle_height,

30

                         IPuzSymmetry       symmetry,

31

                         IPuzSymmetryOffset symmetry_offset)

32

33

468

  IPuzCellCoord mirror_coord = coord;

34

35

  /* We need to be within the puzzle bounds */

36

468

  g_return_val_if_fail (coord.row < puzzle_height && coord.column < puzzle_width, mirror_coord);

37

  /* Symmetry Quarter requires a square grid */

38

468

  if (puzzle_width != puzzle_height)

39

    g_return_val_if_fail (symmetry != IPUZ_SYMMETRY_ROTATIONAL_QUARTER, mirror_coord);

40

41

468

  switch (symmetry)

42

43

    case IPUZ_SYMMETRY_NONE:

44

      break;

45

149

    case IPUZ_SYMMETRY_ROTATIONAL_HALF:

46

149

      mirror_coord.row = puzzle_height - coord.row - 1;

47

149

      mirror_coord.column = puzzle_width - coord.column - 1;

48

149

      break;

49

307

    case IPUZ_SYMMETRY_ROTATIONAL_QUARTER:

50

      /* Nested switch statements. Fun! */

51

      switch (symmetry_offset)

52

53

5

        case IPUZ_SYMMETRY_OFFSET_OPPOSITE:

54

5

          mirror_coord.row = puzzle_height - coord.row - 1;

55

5

          mirror_coord.column = puzzle_width - coord.column - 1;

56

5

          break;

57

151

        case IPUZ_SYMMETRY_OFFSET_CW_ADJACENT:

58

151

          mirror_coord.row = coord.column;

59

151

          mirror_coord.column = puzzle_width - coord.row - 1;

60

151

          break;

61

151

        case IPUZ_SYMMETRY_OFFSET_CCW_ADJACENT:

62

151

          mirror_coord.row = puzzle_height - coord.column - 1;

63

151

          mirror_coord.column = coord.row;

64

151

          break;

65

        default:

66

          g_assert_not_reached ();

67

68

307

      break;

69

4

    case IPUZ_SYMMETRY_HORIZONTAL:

70

4

      mirror_coord.column = puzzle_width - coord.column - 1;

71

4

      break;

72

4

    case IPUZ_SYMMETRY_VERTICAL:

73

4

      mirror_coord.row = puzzle_height - coord.row - 1;

74

4

      break;

75

4

    case IPUZ_SYMMETRY_MIRRORED:

76

      switch (symmetry_offset)

77

78

        case IPUZ_SYMMETRY_OFFSET_OPPOSITE:

79

          mirror_coord.row = puzzle_height - coord.row - 1;

80

          mirror_coord.column = puzzle_width - coord.column - 1;

81

          break;

82

2

        case IPUZ_SYMMETRY_OFFSET_CW_ADJACENT:

83

2

          mirror_coord.column = puzzle_width - coord.column - 1;

84

2

          break;

85

2

        case IPUZ_SYMMETRY_OFFSET_CCW_ADJACENT:

86

2

          mirror_coord.row = puzzle_height - coord.row - 1;

87

2

          break;

88

        default:

89

          g_assert_not_reached ();

90

91

4

      break;

92

    default:

93

      g_assert_not_reached ();

94

95

96

468

  return mirror_coord;

97