1 files changed, 38 insertions, 0 deletions
diff --git a/include/bsdiff/memory_file.h b/include/bsdiff/memory_file.h
new file mode 100644
index 0000000..4100fd6
--- /dev/null
+++ b/include/bsdiff/memory_file.h
@@ -0,0 +1,38 @@
+// Copyright 2016 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef _BSDIFF_MEMORY_FILE_H_
+#define _BSDIFF_MEMORY_FILE_H_
+
+#include <memory>
+
+#include "bsdiff/file_interface.h"
+
+namespace bsdiff {
+
+class MemoryFile : public FileInterface {
+ public:
+  // Creates a read only MemoryFile based on the underlying |data| passed.
+  // The MemoryFile will use data starting from |data| with length of |size| as
+  // the file content. Write is not supported.
+  MemoryFile(const uint8_t* data, size_t size);
+
+  ~MemoryFile() = default;
+
+  // FileInterface overrides.
+  bool Read(void* buf, size_t count, size_t* bytes_read) override;
+  bool Write(const void* buf, size_t count, size_t* bytes_written) override;
+  bool Seek(off_t pos) override;
+  bool Close() override;
+  bool GetSize(uint64_t* size) override;
+
+ private:
+  const uint8_t* data_ = nullptr;
+  size_t size_ = 0;
+  off_t offset_ = 0;
+};
+
+}  // namespace bsdiff
+
+#endif  // _BSDIFF_MEMORY_FILE_H_