1 files changed, 23 insertions, 0 deletions
diff --git a/utils/swap_pod.h b/utils/swap_pod.h
new file mode 100755
index 00000000..bb9a830d
--- /dev/null
+++ b/utils/swap_pod.h
@@ -0,0 +1,23 @@
+#ifndef SWAP_POD_H
+#define SWAP_POD_H
+
+//for swapping objects of the same concrete type where just swapping their bytes will work.  will at least work on plain old data.
+
+#include <algorithm> // not used, but people who use this will want to bring std::swap in anyway
+#include <cstring>
+
+template <class T>
+inline void swap_pod(T &a,T &b) {
+  using namespace std;
+  const unsigned s=sizeof(T);
+  char tmp[s];
+  void *pt=(void*)tmp;
+  void *pa=(void*)&a;
+  void *pb=(void*)&b;
+  memcpy(pt,pa,s);
+  memcpy(pa,pb,s);
+  memcpy(pb,pt,s);
+}
+
+
+#endif