New continuation strategy

eo/src/eoPeriodicContinue.h

@@ -0,0 +1,63 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+// "eoFreqContinue.h"
+
+// (c) OPAC Team, LIFL, Feb. 2006
+
+/* This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Lesser General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+   
+   Contact: cahon@lifl.fr  
+*/
+
+#ifndef __eoPeriodicContinue_h
+#define __eoPeriodicContinue_h
+
+#include <eoContinue.h>
+#include <eoPop.h>
+
+template <class EOT> class eoPeriodicContinue: public eoContinue <EOT> {
+
+public:
+  
+  /** Constructor. The period is given in parameter. */  
+  eoPeriodicContinue (unsigned __period, unsigned __init_counter = 0);
+
+  /** It returns 'true' only if the current number of generations modulo
+      the period doen't equal to zero. */  
+  bool operator () (const eoPop <EOT> & pop);
+    
+private:
+
+  unsigned period;
+  
+  unsigned counter;
+
+};
+
+template <class EOT> 
+eoPeriodicContinue <EOT> :: eoPeriodicContinue (unsigned __period, unsigned __init_counter
+						) : period (__period),
+						    counter (__init_counter) {
+
+}
+
+template <class EOT> 
+bool eoPeriodicContinue <EOT> :: operator () (const eoPop <EOT> & __pop) {
+    
+  return ((++ counter) % period) != 0 ;
+}
+
+#endif
+