[Glacier] Add a basic Array and ArrayView class.

lib/glacier/container/array_view.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace glcr {
+
+template <typename T>
+class ArrayView {
+ public:
+  ArrayView() : data_(nullptr), size_(0) {}
+  ArrayView(const ArrayView&) = default;
+  ArrayView(T* data, uint64_t size) : data_(data), size_(size) {}
+
+  T* RawPtr() { return data_; }
+  const T* RawPtr() const { return data_; }
+
+  uint64_t size() const { return size_; }
+
+  T& operator[](uint64_t index) { return data_[index]; }
+  const T& operator[](uint64_t index) const { return data_[index]; }
+
+ private:
+  T* data_;
+  uint64_t size_;
+};
+
+}  // namespace glcr