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Small improvment to Position::fen()

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No functional change.
This commit is contained in:
Marco Costalba 2013-12-03 10:09:17 +01:00
parent c7e7d9217b
commit e6c9ce6358
2 changed files with 13 additions and 17 deletions
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28
src/position.cpp
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@ -211,7 +211,7 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
*/
char col, row, token;
size_t p;
size_t idx;
Square sq = SQ_A8;
std::istringstream ss(fenStr);
@ -227,9 +227,9 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
else if (token == '/')
sq -= Square(16);
else if ((p = PieceToChar.find(token)) != string::npos)
else if ((idx = PieceToChar.find(token)) != string::npos)
{
put_piece(sq, color_of(Piece(p)), type_of(Piece(p)));
put_piece(sq, color_of(Piece(idx)), type_of(Piece(idx)));
++sq;
}
}
@ -329,25 +329,21 @@ void Position::set_castling_flag(Color c, Square rfrom) {
const string Position::fen() const {
int emptyCnt;
std::ostringstream ss;
for (Rank rank = RANK_8; rank >= RANK_1; --rank)
{
for (File file = FILE_A; file <= FILE_H; ++file)
{
Square sq = file | rank;
if (empty(sq))
{
int emptyCnt = 1;
for ( ; file < FILE_H && empty(++sq); ++file)
++emptyCnt;
for (emptyCnt = 0; file <= FILE_H && empty(file | rank); ++file)
++emptyCnt;
if (emptyCnt)
ss << emptyCnt;
}
else
ss << PieceToChar[piece_on(sq)];
if (file <= FILE_H)
ss << PieceToChar[piece_on(file | rank)];
}
if (rank > RANK_1)
@ -368,11 +364,11 @@ const string Position::fen() const {
if (can_castle(BLACK_OOO))
ss << (chess960 ? file_to_char(file_of(castling_rook_square(BLACK, QUEEN_SIDE)), true) : 'q');
if (st->castlingFlags == NO_CASTLING)
if (!can_castle(WHITE) && !can_castle(BLACK))
ss << '-';
ss << (ep_square() == SQ_NONE ? " - " : " " + square_to_string(ep_square()) + " ")
<< st->rule50 << " " << 1 + (gamePly - int(sideToMove == BLACK)) / 2;
<< st->rule50 << " " << 1 + (gamePly - int(sideToMove == BLACK)) / 2;
return ss.str();
}

2
src/position.h
View file

@ -81,7 +81,7 @@ public:
static void init();
// Text input/output
void set(const std::string& fen, bool isChess960, Thread* th);
void set(const std::string& fenStr, bool isChess960, Thread* th);
const std::string fen() const;
const std::string pretty(Move m = MOVE_NONE) const;