Add SmartCreate functor alongside SmartCopy (#825)

* created source files

* initial work to create SmartCreate

* Reorganized ParticleCreation and added SmartCreate.H

* add missing files

* added possibility to modify weight in SmartCreate

* bugfixing

* bugfixing

* bugfixing

* added comments and SmartCreateMode

* fixed comments

* removed template option

* removed unused includes

1 files changed, 52 insertions, 0 deletions

diff --git a/Source/Particles/ParticleCreation/SmartUtils.cpp b/Source/Particles/ParticleCreation/SmartUtils.cpp
new file mode 100644
index 000000000..eeff136a7
--- /dev/null
+++ b/Source/Particles/ParticleCreation/SmartUtils.cpp
@@ -0,0 +1,52 @@
+/* Copyright 2019-2020 Andrew Myers, Axel Huebl,
+ * Maxence Thevenet
+ *
+ * This file is part of WarpX.
+ *
+ * License: BSD-3-Clause-LBNL
+ */
+#include "SmartUtils.H"
+
+PolicyVec getPolicies (const NameMap& names) noexcept
+{
+    PolicyVec policies;
+    policies.resize(names.size());
+    for (const auto& kv : names)
+    {
+        policies[kv.second] = initialization_policies[kv.first];
+    }
+    return policies;
+}
+
+SmartCopyTag getSmartCopyTag (const NameMap& src, const NameMap& dst) noexcept
+{
+    SmartCopyTag tag;
+
+    // we use the fact that maps are sorted
+    auto i_src = src.begin();
+    auto i_dst = dst.begin();
+    while ( (i_src != src.end()) and (i_dst != dst.end()) )
+    {
+        if (i_src->first < i_dst->first)
+        {
+            // names are not the same and src is lower
+            ++i_src;
+        }
+        else if (i_src->first > i_dst->first)
+        {
+            // names are not the same and dst is lower
+            ++i_dst;
+        }
+        else
+        {
+            // name is in both...
+            tag.common_names.push_back(i_src->first);
+            tag.src_comps.push_back(i_src->second);
+            tag.dst_comps.push_back(i_dst->second);
+            ++i_src;
+            ++i_dst;
+        }
+    }
+
+    return tag;
+}