1 files changed, 54 insertions, 0 deletions
diff --git a/include/tak.h b/include/tak.h
new file mode 100644
index 0000000..5a7f2fa
--- /dev/null
+++ b/include/tak.h
@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+/* 16 bits arranged as follows:
+
+   MSB  : capstone or standing stone
+   14-11: number of stones in the cell, 0x0-0xA valid, 0xF means empty
+   0-10 : stack, LSB is top
+
+*/
+typedef uint16_t cell_t;
+
+#define CELL_EMPTY_VALUE   0b0111100000000000
+#define CELL_MASK_CAPSTAND 0b1000000000000000
+#define CELL_MASK_COUNT    CELL_EMPTY_VALUE
+#define CELL_MASK_STACK    0b0000011111111111
+#define CELL_MASK_NOTSTACK 0b1111100000000000
+
+#define CELL_COUNT_MAX     0b0101000000000000
+#define CELL_COUNT_INC     0b0000100000000000
+#define CELL_COUNT_SHIFT   11
+
+#define CELL_IS_EMPTY(x)     ((x) == CELL_EMPTY_VALUE)
+#define CELL_IS_CAPSTAND(x)  ((x) & CELL_MASK_CAPSTAND)
+#define CELL_TOP_IS_BLACK(x) ((x) & 1)
+#define CELL_TOP_IS_WHITE(x) (~(CELL_TOP_IS_BLACK(x)))
+
+#define CELL_SET_TOP_BLACK(x) ((x) |= 0x0001)
+#define CELL_SET_TOP_WHITE(x) ((x) &= 0xFFFE)
+#define CELL_SET_CAPSTAND(x)  ((x) |= CELL_MASK_CAPSTAND)
+
+#define CELL_GET_COUNT(x)    ((uint8_t)(((x) & CELL_MASK_COUNT) >> CELL_COUNT_SHIFT))
+#define CELL_GET_STACK(x)    ((x) & CELL_MASK_STACK)
+#define CELL_GET_NOTSTACK(x) ((x) & CELL_MASK_NOTSTACK)
+
+enum ACTION_RESULT { A_OK, A_ILLEGAL, A_OVERFLOW };
+
+typedef cell_t* board_t;
+typedef uint64_t bit_board_t; // 8x8 board is exactly 8 bytes :)
+
+#define BITBOARD_SET(bb,location) ((bb) |= 1ULL << (location))
+#define BITBOARD_RST(bb,location) ((bb) &= ~(1ULL << (location)))
+
+enum STONE_VARIANT { STONE_FLAT, STONE_STANDING, STONE_CAPSTONE };
+#define STONE_IS_CAPSTAND(s) ((s == STONE_CAPSTONE) || (s == STONE_STANDING))
+
+// Taking actions
+enum ACTION_RESULT try_place_stone(board_t board, bit_board_t *capstand,
+                                   const uint8_t location, const uint8_t colour,
+                                   const enum STONE_VARIANT stone);
+
+// enum ACTION_RESULT move_stack(board_t *board, bit_board *capstand, uint8_t source, uint);
+
+// Querying things