/////////////////////////////////////////////////////////////////////
/// <summary>
/// sfen形式の盤情報を読み込み
/// </summary>
/// <param name="notation"></param>
/// <param name="sr"></param>
private static int ReadPosition(SPosition position, string sfen, int index = 0)
{
int file, rank;
int ch;
Piece piece;
int piece_num;
SPosition pos = position;
file = 0;
rank = 0;
if (sfen != string.Empty)
{
pos.BoardClear();
}
// 局面データ
while (index < sfen.Length)
{
ch = sfen[index];
index++;
if (ch == ' ')
{
break;
}
if (ch == '/')
{
// 段の区切り
file = 0;
rank += 1;
if (rank >= Square.NRANK)
{
break;
}
}
else if (ch >= '0' && ch <= '9')
{
// 数字は駒がないところ
file += ch - '0';
}
else
{
piece = Piece.NoPiece;
// なり
if (ch == '+')
{
piece |= Piece.PromotionFlag;
if (index < sfen.Length)
{
ch = sfen[index];
index++;
if (ch == ' ')
{
break;
}
}
else
{
break;
}
}
// 後手
if (ch >= 'a' && ch <= 'z')
{
piece |= Piece.WhiteFlag;
ch = char.ToUpper((char)ch);
}
// charをPiece変換
PieceType pieceType;
if (CharToPieceHashtable.TryGetValue((char)ch, out pieceType))
{
piece |= (Piece)pieceType;
}
else
{
// 不明な文字列
Debug.Print("parse error");
piece = Piece.NoPiece;
}
if (piece.TypeOf() != PieceType.NoPieceType)
{
// 駒がある
if (file < Square.NFILE)
{
pos.SetPiece(file, rank, piece);
file++;
}
}
}
}
// 手番
while (index < sfen.Length)
{
ch = sfen[index];
index++;
if (ch == ' ')
{
break;
}
if (ch == 'w')
{
pos.Turn = PlayerColor.White;
}
else if (ch == 'b')
{
pos.Turn = PlayerColor.Black;
}
}
// 持ち駒
while (index < sfen.Length)
{
ch = sfen[index];
index++;
if (ch == ' ')
{
break;
}
piece_num = 1;
// 枚数
if (ch >= '0' && ch <= '9')
{
piece_num = ch - '0';
if (index < sfen.Length)
{
ch = sfen[index];
index++;
}
else
{
break;
}
if (ch == ' ')
{
break;
}
else if (ch >= '0' && ch <= '9')
{
piece_num = (piece_num * 10) + (ch - '0');
if (index < sfen.Length)
{
ch = sfen[index];
index++;
}
else
{
break;
}
if (ch == ' ')
{
break;
}
}
}
PieceType piece_type;
if (CharToPieceHashtable.TryGetValue(char.ToUpper((char)ch), out piece_type))
{
if (char.IsUpper((char)ch))
{
// 大文字は先手
pos.SetBlackHand(piece_type, piece_num);
}
else
{
// 後手
pos.SetWhiteHand(piece_type, piece_num);
}
}
}
// n手目 (読み飛ばす
while (index < sfen.Length)
{
ch = sfen[index];
index++;
if (ch == ' ')
{
break;
}
}
return(index);
}