1 files changed, 92 insertions, 0 deletions
diff --git a/Source/Diagnostics/ReducedDiags/ReducedDiags.cpp b/Source/Diagnostics/ReducedDiags/ReducedDiags.cpp
new file mode 100644
index 000000000..81831aa79
--- /dev/null
+++ b/Source/Diagnostics/ReducedDiags/ReducedDiags.cpp
@@ -0,0 +1,92 @@
+/* Copyright 2019-2020 Maxence Thevenet, Yinjian Zhao
+ *
+ * This file is part of WarpX.
+ *
+ * License: BSD-3-Clause-LBNL
+ */
+
+#include "ReducedDiags.H"
+#include "WarpX.H"
+#include "AMReX_ParmParse.H"
+#include "AMReX_Utility.H"
+#include <iomanip>
+
+using namespace amrex;
+
+// constructor
+ReducedDiags::ReducedDiags (std::string rd_name)
+{
+
+    m_rd_name = rd_name;
+
+    ParmParse pp(m_rd_name);
+
+    // read path
+    pp.query("path", m_path);
+
+    // read extension
+    pp.query("extension", m_extension);
+
+    // creater folder
+    if (!UtilCreateDirectory(m_path, 0755))
+    { CreateDirectoryFailed(m_path); }
+
+    // check if it is a restart run
+    std::string restart_chkfile = "";
+    ParmParse pp_amr("amr");
+    pp_amr.query("restart", restart_chkfile);
+    m_IsNotRestart = restart_chkfile.empty();
+
+    // replace / create output file
+    if ( m_IsNotRestart ) // not a restart
+    {
+        std::ofstream ofs;
+        ofs.open(m_path+m_rd_name+"."+m_extension, std::ios::trunc);
+        ofs.close();
+    }
+
+    // read reduced diags frequency
+    pp.query("frequency", m_freq);
+
+    // read separator
+    pp.query("separator", m_sep);
+
+}
+// end constructor
+
+// write to file function
+void ReducedDiags::WriteToFile (int step) const
+{
+
+    // open file
+    std::ofstream ofs;
+    ofs.open(m_path + m_rd_name + "." + m_extension,
+        std::ofstream::out | std::ofstream::app);
+
+    // write step
+    ofs << step+1;
+
+    ofs << m_sep;
+
+    // set precision
+    ofs << std::fixed << std::setprecision(14) << std::scientific;
+
+    // write time
+    ofs << WarpX::GetInstance().gett_new(0);
+
+    // loop over data size and write
+    for (int i = 0; i < m_data.size(); ++i)
+    {
+        ofs << m_sep;
+        ofs << m_data[i];
+    }
+    // end loop over data size
+
+    // end line
+    ofs << std::endl;
+
+    // close file
+    ofs.close();
+
+}
+// end ReducedDiags::WriteToFile