Merge pull request #3157 from JasonRuonanWang/MgardPlus

MgardPlus: check for empty mesh file
ornladios · Apr 4, 2022 · c285239 · c285239
2 parents 6313d31 + d4a52b2
commit c285239
Showing 1 changed file with 11 additions and 8 deletions.
diff --git a/source/adios2/operator/compress/CompressMGARDPlus.cpp b/source/adios2/operator/compress/CompressMGARDPlus.cpp
@@ -31,14 +31,17 @@ size_t CompressMGARDPlus::Operate(const char *dataIn, const Dims &blockStart,
 {
 
     // Read ADIOS2 files from here
-    adios2::core::ADIOS adios("C++");
-    auto &io = adios.DeclareIO("SubIO");
-    auto *engine = &io.Open(m_Parameters["MeshFile"], adios2::Mode::Read);
-    auto var = io.InquireVariable<float>(m_Parameters["MeshVariable"]);
-    std::vector<float> data(std::accumulate(var->m_Shape.begin(),
-                                            var->m_Shape.end(), sizeof(float),
-                                            std::multiplies<size_t>()));
-    engine->Get(*var, data);
+    if (!m_Parameters["MeshFile"].empty())
+    {
+        adios2::core::ADIOS adios("C++");
+        auto &io = adios.DeclareIO("SubIO");
+        auto *engine = &io.Open(m_Parameters["MeshFile"], adios2::Mode::Read);
+        auto var = io.InquireVariable<float>(m_Parameters["MeshVariable"]);
+        std::vector<float> data(
+            std::accumulate(var->m_Shape.begin(), var->m_Shape.end(),
+                            sizeof(float), std::multiplies<size_t>()));
+        engine->Get(*var, data);
+    }
     // Read ADIOS2 files end, use data for your algorithm
 
     size_t bufferOutOffset = 0;