Add bootloader extension

include/icsneo/device/extensions/bootloader/bytesview.h

@@ -0,0 +1,48 @@
+#ifndef __BOOTLOADER_BYTESVIEW_H_
+#define __BOOTLOADER_BYTESVIEW_H_
+
+#ifdef __cplusplus
+
+#include <cstdint>
+#include <cstddef>
+
+namespace icsneo {
+
+namespace Bootloader {
+
+class BytesView {
+private:
+	const uint8_t* ptr = nullptr;
+	size_t length = 0;
+public:
+	BytesView() = default;
+	BytesView(const uint8_t* buf, size_t size) : ptr(buf), length(size) {}
+
+	const uint8_t* begin() const {
+		return ptr;
+	}
+
+	const uint8_t* end() const {
+		return ptr + length;
+	}
+
+	const uint8_t* data() const {
+		return ptr;
+	}
+
+	size_t size() const {
+		return length;
+	}
+
+	const uint8_t& operator[](size_t index) const {
+		return ptr[index];
+	}
+};
+
+} // namespace Bootloader
+
+} // namespace icsneo
+
+#endif // __cplusplus
+
+#endif // __BOOTLOADER_BYTESVIEW_H_