adding support for different windows compiler

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 7dfb130..5ae5525 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -2,8 +2,10 @@
  * backend.c -- Common back end for X and Windows NT versions of\r
  * XBoard $Id: backend.c,v 2.6 2003/11/28 09:37:36 mann Exp $\r
  *\r
- * Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.\r
- * Enhancements Copyright 1992-2001 Free Software Foundation, Inc.\r
+ * Copyright 1991 by Digital Equipment Corporation, Maynard,\r
+ * Massachusetts.  Enhancements Copyright\r
+ * 1992-2001,2002,2003,2004,2005,2006,2007,2008,2009 Free Software\r
+ * Foundation, Inc.\r
  *\r
  * The following terms apply to Digital Equipment Corporation's copyright\r
  * interest in XBoard:\r
@@ -27,25 +29,25 @@
  * SOFTWARE.\r
  * ------------------------------------------------------------------------\r
  *\r
- * The following terms apply to the enhanced version of XBoard distributed\r
- * by the Free Software Foundation:\r
+ * The following terms apply to the enhanced version of XBoard\r
+ * distributed by the Free Software Foundation:\r
  * ------------------------------------------------------------------------\r
- * This program is free software; you can redistribute it and/or modify\r
+ *\r
+ * GNU XBoard is free software: you can redistribute it and/or modify\r
  * it under the terms of the GNU General Public License as published by\r
- * the Free Software Foundation; either version 2 of the License, or\r
- * (at your option) any later version.\r
+ * the Free Software Foundation, either version 3 of the License, or (at\r
+ * your option) any later version.\r
  *\r
- * This program is distributed in the hope that it will be useful,\r
- * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
- * GNU General Public License for more details.\r
+ * GNU XBoard is distributed in the hope that it will be useful, but\r
+ * WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
+ * General Public License for more details.\r
  *\r
  * You should have received a copy of the GNU General Public License\r
- * along with this program; if not, write to the Free Software\r
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\r
- * ------------------------------------------------------------------------\r
+ * along with this program. If not, see http://www.gnu.org/licenses/.  *\r
  *\r
- * See the file ChangeLog for a revision history.  */\r
+ *------------------------------------------------------------------------\r
+ ** See the file ChangeLog for a revision history.  */\r
 \r
 /* [AS] Also useful here for debugging */\r
 #ifdef WIN32\r
@@ -5994,6 +5996,8 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
                                                        EP_NONE, castlingRights[m-1]) != MT_CHECK)\r
                                        hisPerpetual = 0; // the opponent did not always check\r
                                }\r
+                               if(appData.debugMode) fprintf(debugFP, "XQ perpetual test, our=%d, his=%d\n",\r
+                                                                       ourPerpetual, hisPerpetual);\r
                                if(ourPerpetual && !hisPerpetual) { // we are actively checking him: forfeit\r
                                    GameEnds( WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins, \r
                                           "Xboard adjudication: perpetual checking", GE_XBOARD );\r
@@ -6001,8 +6005,19 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
                                }\r
                                if(hisPerpetual && !ourPerpetual)   // he is checking us, but did not repeat yet\r
                                    break; // (or we would have caught him before). Abort repetition-checking loop.\r
-                               // if neither of us is checking all the time, or both are, it is draw\r
-                               // (illegal-chase forfeits not implemented yet!)\r
+                               // Now check for perpetual chases\r
+                               if(!ourPerpetual && !hisPerpetual) { // no perpetual check, test for chase\r
+                                   hisPerpetual = PerpetualChase(k, forwardMostMove);\r
+                                   ourPerpetual = PerpetualChase(k+1, forwardMostMove);\r
+                                   if(ourPerpetual && !hisPerpetual) { // we are actively checking him: forfeit\r
+                                       GameEnds( WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins, \r
+                                                     "Xboard adjudication: perpetual chasing", GE_XBOARD );\r
+                                       return;\r
+                                   }\r
+                                   if(hisPerpetual && !ourPerpetual)   // he is chasing us, but did not repeat yet\r
+                                       break; // Abort repetition-checking loop.\r
+                               }\r
+                               // if neither of us is checking or chasing all the time, or both are, it is draw\r
                             }\r
                              GameEnds( GameIsDrawn, "Xboard adjudication: repetition draw", GE_XBOARD );\r
                              return;\r
@@ -12884,6 +12899,11 @@ DisplayBothClocks()
    you have neither ftime nor gettimeofday.\r
 */\r
 \r
+/* VS 2008 requires the #include outside of the function */\r
+#if !HAVE_GETTIMEOFDAY && HAVE_FTIME\r
+#include <sys/timeb.h>\r
+#endif\r
+\r
 /* Get the current time as a TimeMark */\r
 void\r
 GetTimeMark(tm)\r