NAME    [Toc]    [Back]

       _tracef,    _tracedump,	  _traceattr,	 _traceattr2,	_nc_tracebits,
       _tracechar, _tracechtype, _tracechtype2, _tracemouse,  trace  -	curses
       debugging routines

SYNOPSIS    [Toc]    [Back]

       #include <curses.h>
       void _tracef(const char *format, ...);
       void _tracedump(const char *label, WINDOW *win);
       char *_traceattr(attr_t attr);
       char *_traceattr2(int buffer, chtype ch);
       char *_nc_tracebits(void);
       char *_tracechar(const unsigned char ch);
       char *_tracechtype(chtype ch);
       char *_tracechtype2(int buffer, chtype ch);
       char *_tracemouse(const MEVENT *event);
       void trace(const unsigned int param);

DESCRIPTION    [Toc]    [Back]

       The  trace  routines  are  used for debugging the ncurses libraries, as
       well as applications which use the ncurses libraries.  These  functions
       are  normally available only with the debugging library libncurses_g.a,
       but may be compiled into any model (shared, static, profile) by	defining
 the symbol TRACE.

       The  principal  parts  of  this	interface  are the trace routine which
       selectively enables different tracing features, and the _tracef routine
       which writes formatted data to the trace file.

       Calling trace with a nonzero parameter opens the file trace in the current
 directory for output.  The parameter is formed  by	OR'ing	values
       from the list of TRACE_xxx definitions in <curses.h>.  These include:

       TRACE_DISABLE
	    turn off tracing.

       TRACE_TIMES
	    trace user and system times of updates.

       TRACE_TPUTS
	    trace tputs calls.

       TRACE_UPDATE
	    trace update actions, old & new screens.

       TRACE_MOVE
	    trace cursor movement and scrolling.

       TRACE_CHARPUT
	    trace all character outputs.

       TRACE_ORDINARY
	    trace  all	update	actions.   The old and new screen contents are
	    written to the trace file for each refresh.

       TRACE_CALLS
	    trace all curses calls.  The parameters for each call are  traced,
	    as well as return values.

       TRACE_VIRTPUT
	    trace virtual character puts, i.e., calls to addch.

       TRACE_IEVENT
	    trace low-level input processing, including timeouts.

       TRACE_BITS
	    trace state of TTY control bits.

       TRACE_ICALLS
	    trace internal/nested calls.

       TRACE_CCALLS
	    trace per-character calls.

       TRACE_DATABASE
	    trace read/write of terminfo/termcap data.

       TRACE_ATTRS
	    trace changes to video attributes and colors.

       TRACE_MAXIMUM
	    maximum trace level, enables all of the separate trace features.

	    Some  tracing features are enabled whenever the trace parameter is
	    nonzero.  Some features overlap.  The specific names are used as a
	    guideline.

RETURN VALUE    [Toc]    [Back]

       Routines  which return a value are designed to be used as parameters to
       the _tracef routine.

PORTABILITY    [Toc]    [Back]

       These functions are not part of the XSI interface.  Some  other	curses
       implementations	are  known to have similar, undocumented features, but
       they are not compatible with ncurses.

SEE ALSO    [Toc]    [Back]

       curses(3X).



								curs_trace(3X)