nodetrace.h

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/* -*-	Mode:C++; c-basic-offset:8; tab-width:8 -*- */
/*
 */

#ifndef ns_nodetrace_h
#define ns_nodetrace_h

#include <math.h> //floor
#include "tcp.h"

class NodeTrace : public TclObject {
public:
	virtual int command(int argc, const char*const* argv);
	NodeTrace();
        ~NodeTrace();
        static int get_seqno(Packet *p);
        static void format (int tt, char* nodeaddress, Packet *p);
	static void dump();
	static inline char* buffer() { return wrk_ ; }

	static inline Tcl_Channel channel() { return channel_; }
	static inline void channel(Tcl_Channel ch) {channel_ = ch; }


	void flush(Tcl_Channel channel) { Tcl_Flush(channel); }

	//Default rounding is to 6 digits after decimal
#define PRECISION 1.0E+6
	//According to freeBSD /usr/include/float.h 15 is the number of digits 
	// in a double.  We can specify all of them, because we're rounding to
	// 6 digits after the decimal and and %g removes trailing zeros.
#define TIME_FORMAT "%.15g"
	// annoying way of tackling sprintf rounding platform 
	// differences :
	// use round(Scheduler::instance().clock()) instead of 
	// Scheduler::instance().clock().
	
	static double round (double x, double precision=PRECISION) {
		return (double)floor(x*precision + 0.5)/precision;
	}

	static inline bool tagged() { return tagged_; }
	static inline void tagged(bool tag) { tagged_ = tag; }

        static NodeTrace& instance();  //returns the ref to this object
        static int trace_on_;  // 1/0 == trace is on/off
	
protected:
	static Tcl_Channel channel_;
	static char *wrk_;
	static bool tagged_;
        static NodeTrace *instance__; //Self referential static instance
                                      // (like stat collector)
};

#endif // NodeTrace