Reorganizing source code. Created util dir

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

src/util/stream_buffer.h

@@ -0,0 +1,46 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    stream_buffer.h
+
+Abstract:
+
+    Simple stream buffer interface.
+    In the future we should be able to read different kinds of stream (e.g., compressed files used
+    in the SAT competitions).
+
+Author:
+
+    Leonardo de Moura (leonardo) 2006-10-02.
+
+Revision History:
+
+--*/
+#ifndef _STREAM_BUFFER_H_
+#define _STREAM_BUFFER_H_
+
+#include<iostream>
+
+class stream_buffer {
+    std::istream & m_stream;
+    int            m_val;
+public:
+    
+    stream_buffer(std::istream & s):
+        m_stream(s) {
+        m_val = m_stream.get();
+    }
+
+    int  operator *() const { 
+        return m_val;
+    }
+
+    void operator ++() { 
+        m_val = m_stream.get();
+    }
+};
+
+#endif /* _STREAM_BUFFER_H_ */
+