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CentOS 7.0 - man page for _tracef (centos section 3x)

curs_trace(3X)											       curs_trace(3X)

_tracef, _tracedump, _traceattr, _traceattr2, _nc_tracebits, _tracecchar_t, _tracecchar_t2, _tracechar, _tracechtype, _tracechtype2, _tracemouse, trace - curses debugging routines
#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);
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 fea- tures, 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 parame- ter 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 re- fresh. 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 spe- cific 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
Routines which return a value are designed to be used as parameters to the _tracef routine.
These functions are not part of the XSI interface. Some other curses implementations are known to have simi- lar, undocumented features, but they are not compatible with ncurses.
curses(3X). curs_trace(3X)

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