X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fpiece.cpp;h=a9adf57366e7ae5b731718524fa942399d048db5;hb=fad595f5b6b343708fc0b4d8ab15ab73040f84c1;hp=a4c2220daccfd3ae7c5bc077a8105d81fe3f938a;hpb=5dc23121215039938a9ef4e59ae934312774571c;p=stockfish

diff --git a/src/piece.cpp b/src/piece.cpp
index a4c2220d..a9adf573 100644
--- a/src/piece.cpp
+++ b/src/piece.cpp
@@ -1,95 +1,39 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008 Marco Costalba
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
-  
+
   Stockfish is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
-  
+
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
-////
-//// Includes
-////
-
-#include <cstring>
+#include <string>
 
 #include "piece.h"
 
+static const std::string PieceChars(" pnbrqk PNBRQK");
 
-////
-//// Constants and variables
-////
-
-const int SlidingArray[18] = {
-  0, 0, 0, 1, 2, 3, 0, 0, 0, 0, 0, 1, 2, 3, 0, 0, 0, 0
-};
-
-const SquareDelta Directions[16][16] = {
-  {DELTA_ZERO},
-  {DELTA_NW, DELTA_NE, DELTA_ZERO},
-  {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
-   DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
-  {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, 
-   DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, 
-   DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-  {DELTA_ZERO},
-  {DELTA_ZERO},
-  {DELTA_SW, DELTA_SE, DELTA_ZERO},
-  {DELTA_SSW, DELTA_SSE, DELTA_SWW, DELTA_SEE,
-   DELTA_NWW, DELTA_NEE, DELTA_NNW, DELTA_NNE, DELTA_ZERO},
-  {DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, 
-   DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-  {DELTA_S, DELTA_E, DELTA_W, DELTA_N, 
-   DELTA_SE, DELTA_SW, DELTA_NE, DELTA_NW, DELTA_ZERO},
-};   
-
-const SquareDelta PawnPush[2] = {
-  DELTA_N, DELTA_S
-};
 
+/// Translating piece types to/from English piece letters
 
-////
-//// Functions
-////
+char piece_type_to_char(PieceType pt, bool upcase) {
 
-/// Translating piece types to/from English piece letters:
-
-static const char PieceChars[] = " pnbrqk";
-
-char piece_type_to_char(PieceType pt, bool upcase = false) {
-  return upcase? toupper(PieceChars[pt]) : PieceChars[pt];
+  return PieceChars[pt + (upcase ? 7 : 0)];
 }
 
 PieceType piece_type_from_char(char c) {
-  const char *ch = strchr(PieceChars, tolower(c));
-  return ch? PieceType(ch - PieceChars) : NO_PIECE_TYPE;
-}
 
+  size_t idx = PieceChars.find(c);
 
-/// piece_is_ok() and piece_type_is_ok(), for debugging:
-
-bool piece_is_ok(Piece pc) {
-  return
-    piece_type_is_ok(type_of_piece(pc)) &&
-    color_is_ok(color_of_piece(pc));
-}
-
-bool piece_type_is_ok(PieceType pc) {
-  return pc >= PAWN && pc <= KING;
+  return idx != std::string::npos ? PieceType(idx % 7) : PIECE_TYPE_NONE;
 }