static boolean
history_forward (hex_t hex)
{
unsigned int current = hex->history_current;
int i, j;
if (hex->history_current == hex->history_size)
return FALSE;
i = hex->history[current][0];
j = hex->history[current][1];
hex->end_of_game_p = hex->history[current][2];
CELL (hex,i,j).player = hex->player;
SWITCH_PLAYER (hex);
hex->history_current++;
return TRUE;
}
static boolean
history_backward (hex_t hex)
{
unsigned int current;
int i, j;
if (hex->history_current == 0)
return FALSE;
hex->history_current--;
current = hex->history_current;
i = hex->history[current][0];
j = hex->history[current][1];
hex->end_of_game_p = 0;
CELL(hex,i,j).player = 0;
SWITCH_PLAYER (hex);
return TRUE;
}
hex_status_t
hex_move (hex_t hex, uint i, uint j)
{
hex_status_t status;
unsigned int current;
status = hex_move_1 (hex, hex->player, i, j);
if (status == HEX_SUCCESS)
{
SWITCH_PLAYER (hex);
/* Truncate the 'future' history */
if (hex->history_current < hex->history_size)
recompute_setting (hex);
current = hex->history_current;
hex->history[current][0] = i;
hex->history[current][1] = j;
hex->history[current][2] = hex->end_of_game_p;
hex->history_current++;
hex_truncate_history (hex);
}
return status;
}
int ai_play(ai* self, int col, int row) {
int i,
move_id = -1,
moves_len = self->moves_len;
future_move *move;
for (i=0; i<moves_len; i++) {
move = (self->moves)[i];
if ((move->col == col) && (move->row == row)) {
move_id = i;
break;
}
}
if (move_id < 0) {
return CANNOT_PLAY_HERE;
}
/* delete all others possible moves */
for (i=0; i<moves_len; i++) {
if (move_id != i) {
free_future_move((self->moves)[i]);
}
}
/* put this move's future moves into current position */
self->moves = move->moves;
self->moves_len = move->moves_len;
/* delete this move */
move->moves = NULL;
free_future_move(move);
put_piece_by_colrow(self->b, col, row, self->current_player_c);
SWITCH_PLAYER(self->current_player_c);
return 0;
}
