1 files changed, 44 insertions, 0 deletions
diff --git a/llvm/lib/Object/DXContainer.cpp b/llvm/lib/Object/DXContainer.cpp
new file mode 100644
index 0000000..e1aea562
--- /dev/null
+++ b/llvm/lib/Object/DXContainer.cpp
@@ -0,0 +1,44 @@
+//===- DXContainer.cpp - DXContainer object file implementation -----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/DXContainer.h"
+#include "llvm/BinaryFormat/DXContainer.h"
+#include "llvm/Object/Error.h"
+
+using namespace llvm;
+using namespace llvm::object;
+
+static Error parseFailed(const Twine &Msg) {
+  return make_error<GenericBinaryError>(Msg.str(), object_error::parse_failed);
+}
+
+template <typename T>
+static Error readStruct(StringRef Buffer, const char *P, T &Struct) {
+  // Don't read before the beginning or past the end of the file
+  if (P < Buffer.begin() || P + sizeof(T) > Buffer.end())
+    return parseFailed("Reading structure out of file bounds");
+
+  memcpy(&Struct, P, sizeof(T));
+  // DXContainer is always BigEndian
+  if (sys::IsBigEndianHost)
+    Struct.byteSwap();
+  return Error::success();
+}
+
+DXContainer::DXContainer(MemoryBufferRef O) : Data(O) {}
+
+Error DXContainer::parseHeader() {
+  return readStruct(Data.getBuffer(), Data.getBuffer().data(), Header);
+}
+
+Expected<DXContainer> DXContainer::create(MemoryBufferRef Object) {
+  DXContainer Container(Object);
+  if (Error Err = Container.parseHeader())
+    return std::move(Err);
+  return Container;
+}