Device: Add disk write driver framework

At the moment, no drivers are implemented, so all devices have Access::None.

include/icsneo/disk/nulldiskdriver.h

@@ -0,0 +1,44 @@
+#ifndef __NULLDISKREADDRIVER_H__
+#define __NULLDISKREADDRIVER_H__
+
+#ifdef __cplusplus
+
+#include "icsneo/disk/diskreaddriver.h"
+#include "icsneo/disk/diskwritedriver.h"
+#include <limits>
+
+namespace icsneo {
+
+namespace Disk {
+
+/**
+ * A disk driver which always returns the requested disk as unsupported
+ * 
+ * Used for devices which do not have a disk, or do not provide any means for accessing it
+ */
+class NullDriver : public ReadDriver, public WriteDriver {
+public:
+	optional<uint64_t> readLogicalDisk(Communication& com, device_eventhandler_t report,
+		uint64_t pos, uint8_t* into, uint64_t amount, std::chrono::milliseconds timeout = DefaultTimeout) override;
+	optional<uint64_t> writeLogicalDisk(Communication& com, device_eventhandler_t report, ReadDriver& readDriver,
+		uint64_t pos, const uint8_t* from, uint64_t amount, std::chrono::milliseconds timeout = DefaultTimeout) override;
+	Access getAccess() const override { return Access::None; }
+	std::pair<uint32_t, uint32_t> getBlockSizeBounds() const override {
+		static_assert(SectorSize <= std::numeric_limits<uint32_t>::max(), "Incorrect sector size");
+		static_assert(SectorSize >= std::numeric_limits<uint32_t>::min(), "Incorrect sector size");
+		return { static_cast<uint32_t>(SectorSize), static_cast<uint32_t>(SectorSize) };
+	}
+
+private:
+	optional<uint64_t> readLogicalDiskAligned(Communication& com, device_eventhandler_t report,
+		uint64_t pos, uint8_t* into, uint64_t amount, std::chrono::milliseconds timeout) override;
+	optional<uint64_t> writeLogicalDiskAligned(Communication& com, device_eventhandler_t report,
+		uint64_t pos, const uint8_t* atomicBuf, const uint8_t* from, uint64_t amount, std::chrono::milliseconds timeout) override;
+};
+
+} // namespace Disk
+
+} // namespace icsneo
+
+#endif // __cplusplus
+#endif // __NULLDISKREADDRIVER_H__