Added rascsi filter to limit logging to a particular device (#978)

* Support for ID and LUN parameter for the -L option in rascsi

* Added DeviceLogger class

* Removed dupiicate code

* Fixed SonarQube issues

* Added unit tests, improved code sharing

* Fixed regression (#979)

cpp/devices/device_logger.cpp

@@ -0,0 +1,75 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2022 Uwe Seimet
+//
+//---------------------------------------------------------------------------
+
+#include "shared/log.h"
+#include "device_logger.h"
+
+using namespace std;
+
+void DeviceLogger::Trace(const string& message) const
+{
+	if (const string m = GetLogMessage(message); !m.empty()) {
+		LOGTRACE("%s", m.c_str())
+	}
+}
+
+void DeviceLogger::Debug(const string& message) const
+{
+	if (const string m = GetLogMessage(message); !m.empty()) {
+		LOGDEBUG("%s", m.c_str())
+	}
+}
+
+void DeviceLogger::Info(const string& message) const
+{
+	if (const string m = GetLogMessage(message); !m.empty()) {
+		LOGINFO("%s", m.c_str())
+	}
+}
+
+void DeviceLogger::Warn(const string& message) const
+{
+	if (const string m = GetLogMessage(message); !m.empty()) {
+		LOGWARN("%s", m.c_str())
+	}
+}
+
+void DeviceLogger::Error(const string& message) const
+{
+	if (const string m = GetLogMessage(message); !m.empty()) {
+		LOGERROR("%s", m.c_str())
+	}
+}
+
+string DeviceLogger::GetLogMessage(const string& message) const
+{
+	if (log_device_id == -1 || (log_device_id == id && (log_device_lun == -1 || log_device_lun == lun)))
+	{
+		if (lun == -1) {
+			return "(ID " + to_string(id) + ") - " + message;
+		}
+		else {
+			return "(ID:LUN " + to_string(id) + ":" + to_string(lun) + ") - " + message;
+		}
+	}
+
+	return "";
+}
+
+void DeviceLogger::SetIdAndLun(int i, int l)
+{
+	id = i;
+	lun = l;
+}
+
+void DeviceLogger::SetLogIdAndLun(int i, int l)
+{
+	log_device_id = i;
+	log_device_lun = l;
+}