start mqtt client (based on paho.mqtt.c), basically works

3rd/paho.mqtt.c/src/Log.h

@@ -0,0 +1,93 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2022 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution. 
+ *
+ * The Eclipse Public License is available at 
+ *    https://www.eclipse.org/legal/epl-2.0/
+ * and the Eclipse Distribution License is available at 
+ *   http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    Ian Craggs - initial API and implementation and/or initial documentation
+ *    Ian Craggs - updates for the async client
+ *******************************************************************************/
+
+#if !defined(LOG_H)
+#define LOG_H
+
+#if defined(_WIN32)
+	#include <windows.h>
+	#define thread_id_type DWORD
+#else
+	#include <pthread.h>
+	#define thread_id_type pthread_t
+#endif
+
+/*BE
+map LOG_LEVELS
+{
+	"TRACE_MAXIMUM" 1
+	"TRACE_MEDIUM" 2
+	"TRACE_MINIMUM" 3
+	"TRACE_PROTOCOL" 4
+
+	"ERROR" 5
+	"SEVERE" 6
+	"FATAL" 7
+}
+BE*/
+
+enum LOG_LEVELS {
+	INVALID_LEVEL = -1,
+	TRACE_MAXIMUM = 1,
+	TRACE_MEDIUM,
+	TRACE_MINIMUM,
+	TRACE_PROTOCOL,
+	LOG_ERROR,
+	LOG_SEVERE,
+	LOG_FATAL,
+};
+
+
+/*BE
+def trace_settings_type
+{
+   n32 map LOG_LEVELS "trace_level"
+   n32 dec "max_trace_entries"
+   n32 dec "trace_output_level"
+}
+BE*/
+typedef struct
+{
+	enum LOG_LEVELS trace_level;	/**< trace level */
+	int max_trace_entries;		/**< max no of entries in the trace buffer */
+	enum LOG_LEVELS trace_output_level;		/**< trace level to output to destination */
+} trace_settings_type;
+
+extern trace_settings_type trace_settings;
+
+#define LOG_PROTOCOL TRACE_PROTOCOL
+#define TRACE_MAX TRACE_MAXIMUM
+#define TRACE_MIN TRACE_MINIMUM
+#define TRACE_MED TRACE_MEDIUM
+
+typedef struct
+{
+	const char* name;
+	const char* value;
+} Log_nameValue;
+
+int Log_initialize(Log_nameValue*);
+void Log_terminate(void);
+
+void Log(enum LOG_LEVELS, int, const char *, ...);
+void Log_stackTrace(enum LOG_LEVELS, int, thread_id_type, int, const char*, int, int*);
+
+typedef void Log_traceCallback(enum LOG_LEVELS level, const char *message);
+void Log_setTraceCallback(Log_traceCallback* callback);
+void Log_setTraceLevel(enum LOG_LEVELS level);
+
+#endif