Add sanity check in MMPLD writer for running on little endian system

The MMPLD file format (version 1.2) is little endian only. The MMPLD writer uses simple byte writes without conversions so we have to make sure that we are running on a little endian system. Signed-off-by: Christoph Niethammer <[email protected]>
ls1mardyn · Dec 8, 2023 · 88516aa · 88516aa
1 parent cab9130
commit 88516aa
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/src/io/MmpldWriter.cpp b/src/io/MmpldWriter.cpp
@@ -13,7 +13,6 @@
 #include <endian.h>
 #endif
 
-
 #include <fstream>
 #include <sstream>
 #include <vector>
@@ -27,8 +26,9 @@
 #include "particleContainer/ParticleContainer.h"
 #include "parallel/DomainDecompBase.h"
 #include "Simulation.h"
-#include "utils/Logger.h"
 #include "utils/FileUtils.h"
+#include "utils/Logger.h"
+#include "utils/mardyn_assert.h"
 
 
 // default version to use for mmpld format writing. possible values: 100 or 102
@@ -142,6 +142,11 @@ void MmpldWriter::readXML(XMLfileUnits& xmlconfig)
 void MmpldWriter::init(ParticleContainer *particleContainer,
 						DomainDecompBase *domainDecomp, Domain *domain)
 {
+	if ( (htole32(1) != 1) || (htole64(1.0) != 1.0) ) {
+		Log::global_log->error() << "[MMPLD Writer] The MMPLD Writer currently only supports running on little endian systems." << std::endl;
+		mardyn_exit(1);
+	}
+
 	// only executed once
 	this->PrepareWriteControl();