create a more generic class for monitoring to any ostream (useful for output to clog or cerr, for example), the stdout monitor now inherits from it

eo/src/utils/eoOStreamMonitor.cpp

@@ -0,0 +1,62 @@
+#ifdef _MSC_VER
+// to avoid long name warnings
+#pragma warning(disable:4786)
+#endif 
+
+#include <iostream>
+#include <fstream>
+#include <stdexcept>
+#include <iomanip>
+#include <ios>
+
+#include <utils/eoOStreamMonitor.h>
+#include <utils/compatibility.h>
+#include <utils/eoParam.h>
+#include <eoLogger.h>
+
+//using namespace std;
+
+eoMonitor& eoOStreamMonitor::operator()(void)
+{
+    if (!out) {
+        std::string str = "eoOStreamMonitor: Could not write to the ooutput stream";
+      throw std::runtime_error(str);
+    }
+
+    if (firsttime) {
+
+      if (verbose) {
+        eo::log << eo::progress << "First Generation" << std::endl;
+
+      } else { // else verbose
+          for (iterator it = vec.begin (); it != vec.end (); ++it) {
+              out << (*it)->longName ();
+              out << delim << std::left << std::setfill(fill) << std::setw(width);
+	      }
+          out << std::endl;
+	  } // else verbose
+
+      firsttime = false;
+    } // if firstime
+
+    // ok, now the real saving. write out
+    if (verbose) {
+        for (iterator it = vec.begin (); it != vec.end (); ++it) {
+            // name: value
+            out << (*it)->longName () << ": " << (*it)->getValue () << std::endl;
+        } // for it in vec
+
+        eo::log << eo::progress << "End of Generation" << std::endl;
+
+    } else { // else verbose
+        for (iterator it = vec.begin (); it != vec.end (); ++it) {
+            // value only
+            out << (*it)->getValue ();
+            out << delim << std::left << std::setfill(fill) << std::setw(width);
+        } // for it in vec
+
+        out << std::endl;
+    } // if verbose
+
+  return *this;
+}