X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=book.c;h=b57407358cc993113c69e4f35d615e7416accb5e;hb=04886e8f191744d287b126d97cf198694ffab97d;hp=314019f3018100905cb3d21cf71e05693b1f1350;hpb=fcd47eab73ab2998ab3709f8f3cd444058cb20c9;p=xboard.git

diff --git a/book.c b/book.c
index 314019f..b574073 100644
--- a/book.c
+++ b/book.c
@@ -11,24 +11,27 @@
  * The following terms apply to the enhanced version of XBoard distributed
  * by the Free Software Foundation:
  * ------------------------------------------------------------------------
- * This program is free software; you can redistribute it and/or modify
+ *
+ * GNU XBoard 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 2 of the License, or
- * (at your option) any later version.
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
  *
- * This program 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.
+ * GNU XBoard 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * along with this program. If not, see http://www.gnu.org/licenses/.  *
+ *
  * ------------------------------------------------------------------------
  */
 
 #include <stdio.h>
 #include <string.h>
+#include <time.h>
+#include <stdlib.h>
 
 #include "common.h"
 #include "backend.h"
@@ -62,8 +65,6 @@ entry_t entry_none = {
 };
 
 char *promote_pieces=" nbrqac=";
-extern char castlingRights[][BOARD_SIZE];
-extern char epStatus[];
 
 uint64 Random64[781] = {
    U64(0x9D39247E33776D41), U64(0x2AF7398005AAA5C7), U64(0x44DB015024623547), U64(0x9C15F73E62A76AE2),
@@ -272,8 +273,7 @@ uint64 *RandomTurn      =Random64+780;
 
 uint64 hash(int moveNr)
 {
-    char c;
-    int p, r, f, i, p_enc, squareNr, pieceGroup;
+    int r, f, p_enc, squareNr, pieceGroup;
     uint64 key=0, Zobrist;
 
     for(f=BOARD_LEFT; f<BOARD_RGHT; f++){
@@ -310,16 +310,16 @@ uint64 hash(int moveNr)
     }
     // Holdings not implemented yet!
 
-    if(castlingRights[moveNr][2] >= 0) {
-	if(castlingRights[moveNr][0] >= 0) key^=RandomCastle[0];
-	if(castlingRights[moveNr][1] >= 0) key^=RandomCastle[1];
+    if(boards[moveNr][CASTLING][2] != NoRights) {
+	if(boards[moveNr][CASTLING][0] != NoRights) key^=RandomCastle[0];
+	if(boards[moveNr][CASTLING][1] != NoRights) key^=RandomCastle[1];
     }
-    if(castlingRights[moveNr][5] >= 0) {
-	if(castlingRights[moveNr][3] >= 0) key^=RandomCastle[2];
-	if(castlingRights[moveNr][4] >= 0) key^=RandomCastle[3];
+    if(boards[moveNr][CASTLING][5] != NoRights) {
+	if(boards[moveNr][CASTLING][3] != NoRights) key^=RandomCastle[2];
+	if(boards[moveNr][CASTLING][4] != NoRights) key^=RandomCastle[3];
     }
 
-    f = epStatus[moveNr];
+    f = boards[moveNr][EP_STATUS];
     if(f >= 0 && f < 8){
         if(!WhiteOnMove(moveNr)){
 	    // the test for neighboring Pawns might not be needed, 
@@ -479,7 +479,10 @@ char *ProbeBook(int moveNr, char *book)
     if(appData.debugMode) fprintf(debugFP, "book key = %08x%08x\n", (unsigned int)(key>>32), (unsigned int)key);
 
     offset=find_key(f, key, &entry);
-    if(entry.key != key) return NULL;
+    if(entry.key != key) {
+	  fclose(f);
+	  return NULL;
+    }
     entries[0] = entry;
     count=1;
     fseek(f, 16*(offset+1), SEEK_SET);
@@ -498,7 +501,6 @@ char *ProbeBook(int moveNr, char *book)
     for(i=0; i<count; i++){
         total_weight += entries[i].weight;
     }
-    srandom( time(0) );
     j = (random() & 0x7FFF) * total_weight >> 15; // create random < total_weight
     total_weight = 0;
     for(i=0; i<count; i++){
@@ -509,5 +511,6 @@ char *ProbeBook(int moveNr, char *book)
     move_to_string(move_s, entries[i].move);
     if(appData.debugMode) fprintf(debugFP, "book move field = %d\n", entries[i].move);
 
+    fclose(f);
     return move_s;
 }