overhauled physics engine

external/sdpa/sdpa_tool.cpp

@@ -0,0 +1,71 @@
+/* -------------------------------------------------------------
+
+This file is a component of SDPA
+Copyright (C) 2004-2013 SDPA Project
+
+This program 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.
+
+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.
+
+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
+
+------------------------------------------------------------- */
+/*-----------------------------------------
+  sdpa_tool.cpp
+-----------------------------------------*/
+
+#include "sdpa_tool.h"
+#include <sys/time.h>
+#include <time.h>
+
+#include <unistd.h>
+#ifndef CLK_TCK
+#define  CLK_TCK  sysconf(_SC_CLK_TCK)
+#endif
+
+namespace sdpa {
+
+// These are constant.
+// Do Not Change .
+int IZERO =  0;
+int IONE  =  1;
+int IMONE = -1;
+double DZERO =  0.0;
+double DONE  =  1.0;
+double DMONE = -1.0;
+
+double Time::rGetUseTime()
+{
+  #if PROCESS_TIME
+  struct tms TIME;
+  times(&TIME);
+  return (double)TIME.tms_utime/(double)CLK_TCK;
+  #else
+  return 0.0;
+  #endif
+}
+
+void Time::rSetTimeVal(struct timeval& targetVal)
+{
+  static struct timezone tz;
+  gettimeofday(&targetVal,&tz);
+}
+
+double Time::rGetRealTime(const struct timeval& start,
+			   const struct timeval& end)
+{
+  const long int second = end.tv_sec - start.tv_sec;
+  const long int usecond = end.tv_usec - start.tv_usec;
+  return ((double)second) + ((double)usecond)*(1.0e-6);
+}
+
+} // end of namespace 'sdpa'
+