1 files changed, 28 insertions, 0 deletions
diff --git a/src/base/platform/win/StreamConvert.cpp b/src/base/platform/win/StreamConvert.cpp
new file mode 100644
index 00000000..f7a0537c
--- /dev/null
+++ b/src/base/platform/win/StreamConvert.cpp
@@ -0,0 +1,28 @@
+#include "cru/base/platform/win/StreamConvert.h"
+#include "BrigdeComStream.h"
+#include "Win32FileStreamPrivate.h"
+#include "cru/base/Exception.h"
+#include "cru/base/io/MemoryStream.h"
+#include "cru/base/io/OpenFileFlag.h"
+#include "cru/base/platform/win/ComAutoInit.h"
+#include "cru/base/platform/win/Exception.h"
+#include "cru/base/platform/win/Win32FileStream.h"
+
+#include <shlwapi.h>
+#include <winnt.h>
+
+namespace cru::platform::win {
+IStream* ConvertStreamToComStream(io::Stream* stream) {
+  static ComAutoInit com_auto_init;
+
+  if (auto memory_stream = dynamic_cast<io::MemoryStream*>(stream)) {
+    return SHCreateMemStream(
+        reinterpret_cast<const BYTE*>(memory_stream->GetBuffer()),
+        memory_stream->GetSize());
+  } else if (auto file_stream = dynamic_cast<Win32FileStream*>(stream)) {
+    return file_stream->GetPrivate_()->stream_;
+  } else {
+    return new BridgeComStream(stream);
+  }
+}
+}  // namespace cru::platform::win