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#include <stdint.h>
enum E_RESULT { A_OK, A_ILLEGAL, A_OVERFLOW,
PTN_VALID, PTN_INVALID, W_NONE, W_DRAW, W_DRAGON,
W_ROAD_WHITE, W_ROAD_BLACK, W_FLAT_WHITE, W_FLAT_BLACK };
// -------------------------------------------------------------------
// State management
enum COLOUR { C_WHITE, C_BLACK };
enum STONE_VARIANT { STONE_FLAT, STONE_STANDING, STONE_CAPSTONE };
enum MOVE_DIRECTION { M_UP, M_DOWN, M_LEFT, M_RIGHT };
typedef uint8_t data_t;
typedef uint16_t colour_stack_t;
uint8_t board_size;
data_t celldat[36];
colour_stack_t colours[36];
enum COLOUR current_colour;
uint8_t white_flats, black_flats, white_caps, black_caps, turn;
void reset_state(const uint8_t new_board_size);
void next_turn(void);
enum E_RESULT
try_place(const int8_t location, const enum COLOUR colour,
const enum STONE_VARIANT stone);
enum E_RESULT
try_move(const int8_t location, const enum MOVE_DIRECTION direction,
const uint8_t steps, const uint8_t drops[5]);
enum E_RESULT
check_win(void);
// -------------------------------------------------------------------
// PTN related
enum E_RESULT
parse_place(const uint8_t board_size, char *ptn,
uint8_t *out_location, enum STONE_VARIANT *out_stone);
enum E_RESULT
parse_move(const uint8_t board_size, char *ptn,
uint8_t *out_location, enum MOVE_DIRECTION *out_direction,
uint8_t *out_steps, uint8_t out_drops[5]);
void
generate_place(const uint8_t board_size, const uint8_t in_location,
const enum STONE_VARIANT in_stone, char out_ptn[4]);
void
generate_move(const uint8_t board_size, const uint8_t in_location,
const enum MOVE_DIRECTION in_direction,
const uint8_t in_steps, const uint8_t in_drops[5],
char out_ptn[10]);
// -------------------------------------------------------------------
// Game driver
enum E_RESULT
do_ptn(char *ptn);
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