Moved from wb (wb_error)

src/lib/co/src/co_error.h

+#ifndef co_error_h
+#define co_error_h
+
+#include "pwr.h"
+#include "co_status.h"
+
+class co_error : public co_status
+{
+ public:
+  co_error() {};
+  co_error( pwr_tStatus sts) : co_status(sts) {}
+};
+
+class co_error_str : public co_error
+{
+  string m_error_str;
+    
+ public:
+  co_error_str(string str) : m_error_str(str) {} 
+  co_error_str( pwr_tStatus sts, string str): co_error(sts), m_error_str(str) {}
+  string what() const
+  {
+    string s;
+    if ( m_sts)
+      s = m_error_str + ", " + co_error::what();
+    else
+      s = m_error_str;
+    return s;
+  }
+};
+
+#endif