Reorganizing the code

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

src/sat/sat_iff3_finder.h

@@ -0,0 +1,48 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    sat_iff3_finder.h
+
+Abstract:
+
+    Find constraints of the form   x = l1 = l2
+    That is, search for clauses of the form
+      ~x \/ l1  \/ ~l2
+      ~x \/ ~l1 \/ l2
+       x \/ l1  \/ l2
+       x \/ ~l1 \/ ~l2
+       
+    The basic idea is to sort the watch lists.
+    
+    This information can be used to propagate equivalences
+    during probing (and search).
+
+Author:
+
+    Leonardo de Moura (leonardo) 2011-06-04.
+
+Revision History:
+
+--*/
+#ifndef _SAT_IFF3_FINDER_H_
+#define _SAT_IFF3_FINDER_H_
+
+#include"sat_types.h"
+
+namespace sat {
+    
+    class iff3_finder {
+        solver & s;
+        void sort_watches();
+        void mk_eq(literal l1, literal l2);
+    public:
+        iff3_finder(solver & s);
+        
+        void operator()();
+    };
+
+};
+
+#endif