Codechange: use the fmt library for simpler debug formats

src/debug.h

@@ -12,6 +12,7 @@
 
 #include "cpu.h"
 #include <chrono>
+#include "3rdparty/fmt/format.h"
 
 /* Debugging messages policy:
  * These should be the severities used for direct DEBUG() calls
@@ -27,6 +28,16 @@
  * 6.. - extremely detailed spamming
  */
 
+void debug_print(const char *dbg, const char *buf);
+
+/**
+ * Ouptut a line of debugging information.
+ * @param name The category of debug information.
+ * @param level The maximum debug level this message should be shown at. When the debug level for this category is set lower, then the message will not be shown.
+ * @param format_string The formatting string of the message.
+ */
+#define Debug(name, level, format_string, ...) if ((level) == 0 || _debug_ ## name ## _level >= (level)) debug_print(#name, fmt::format(FMT_STRING(format_string), ## __VA_ARGS__).c_str())
+
 /**
  * Output a line of debugging information.
  * @param name Category