2 files changed, 26 insertions, 2 deletions
diff --git a/Source/Utils/WarpXUtil.H b/Source/Utils/WarpXUtil.H
index fd6e72dc6..ab28c5446 100644
--- a/Source/Utils/WarpXUtil.H
+++ b/Source/Utils/WarpXUtil.H
@@ -2,6 +2,8 @@
 #include <AMReX_Vector.H>
 #include <AMReX_MultiFab.H>
 
+#include <string>
+
 void ReadBoostedFrameParameters(amrex::Real& gamma_boost, amrex::Real& beta_boost,
                                 amrex::Vector<int>& boost_direction);
 
@@ -9,3 +11,13 @@ void ConvertLabParamsToBoost();
 
 void NullifyMF(amrex::MultiFab& mf, int lev, amrex::Real zmin,
                amrex::Real zmax);
+
+namespace WarpXUtilIO{
+    /**
+     * A helper function to write binary data on disk.
+     * @param[in] filename where to write
+     * @param[in] data Vector containing binary data to write on disk
+     * return true if it succeeds, false otherwise
+     */
+    bool WriteBinaryDataOnFile(std::string filename, const amrex::Vector<char>& data);
+}
diff --git a/Source/Utils/WarpXUtil.cpp b/Source/Utils/WarpXUtil.cpp
index 4b11eb69d..8764a09c6 100644
--- a/Source/Utils/WarpXUtil.cpp
+++ b/Source/Utils/WarpXUtil.cpp
@@ -1,10 +1,11 @@
-#include <cmath>
-
 #include <WarpXUtil.H>
 #include <WarpXConst.H>
 #include <AMReX_ParmParse.H>
 #include <WarpX.H>
 
+#include <cmath>
+#include <fstream>
+
 using namespace amrex;
 
 void ReadBoostedFrameParameters(Real& gamma_boost, Real& beta_boost,
@@ -152,3 +153,14 @@ void NullifyMF(amrex::MultiFab& mf, int lev, amrex::Real zmin, amrex::Real zmax)
         }
     }
 }
+
+namespace WarpXUtilIO{
+    bool WriteBinaryDataOnFile(std::string filename, const amrex::Vector<char>& data)
+    {
+        std::ofstream of{filename, std::ios::binary};
+        of.write(data.data(), data.size());
+        of.close();
+        return  of.good();
+    }
+}
+