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curs_trace

Section: Miscellaneous Library Functions (3X)
Updated:
Index Return to Main Contents
 

NAME

_tracef, _tracedump, _traceattr, _traceattr2, _nc_tracebits, _tracecchar_t, _tracecchar_t2, _tracechar, _tracechtype, _tracechtype2, _tracemouse, trace - curses debugging routines  

SYNOPSIS

#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 * _tracecchar_t(const cchar_t *string);
char * _tracecchar_t2(int buffer, const cchar_t *string);
char *_tracechar(int ch);
char *_tracechtype(chtype ch);
char *_tracechtype2(int buffer, chtype ch);
char *_tracemouse(const MEVENT *event);
void trace(const unsigned int param);  

DESCRIPTION

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. Additionally, some functions are only available with the wide-character configuration of the libraries.

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.

These functions check the NCURSES_TRACE environment variable, to set the tracing feature as if trace was called:

filter, initscr, new_prescr, newterm, nofilter, ripoffline, setupterm, slk_init, tgetent

 

RETURN VALUE

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

PORTABILITY

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

curses(3X).


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
PORTABILITY
SEE ALSO


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