static void
test_fen_basic(void)
{
struct position *position;
struct position *next;
move move;
char str[FEN_BUFFER_LENGTH + MOVE_STR_BUFFER_LENGTH];
static const char *empty_fen = "8/8/8/8/8/8/8/8 w - - 0 1";
unsigned hm, fm;
int ep_index;
enum player turn;
position = position_allocate();
next = position_allocate();
assert(position_print_fen_full(position, str, 0, 1, 0, white)
== str + strlen(empty_fen));
assert(strcmp(empty_fen, str) == 0);
assert(NULL != position_read_fen_full(position, start_position_fen,
&ep_index, &fm, &hm, &turn));
assert(ep_index == 0);
assert(hm == 0 && fm == 1 && turn == white);
assert(position_print_fen_full(position, str, 0, 1, 0, white)
== str + strlen(start_position_fen));
assert(strcmp(str, start_position_fen) == 0);
move = create_move_t(str_to_index("e2", white),
str_to_index("e4", white),
mt_pawn_double_push, pawn, 0, false);
setup_registers();
make_move(next, position, move);
assert(position_piece_at(next, str_to_index("e2", black)) == nonpiece);
assert(position_piece_at(next, str_to_index("e4", black)) == pawn);
position_destroy(position);
position_destroy(next);
}
static char*
FEN_print_board(const struct position *pos, char *str, enum player turn)
{
int empty_count;
for (int rank = rank_8; ; rank += RSOUTH) {
empty_count = 0;
for (int file = file_a; is_valid_file(file); file += EAST) {
int i = ind(rank, file);
if (turn == black)
i = flip_i(i);
enum piece p = position_piece_at(pos, i);
enum player player = position_player_at(pos, i);
if (p != nonpiece) {
if (empty_count > 0) {
*str++ = '0' + (char)empty_count;
empty_count = 0;
}
if (turn == black)
player = opponent_of(player);
*str++ = square_to_char(p, player);
}
else {
++empty_count;
}
}
if (empty_count > 0)
*str++ = '0' + empty_count;
if (rank == rank_1)
return str;
else
*str++ = '/';
}
}