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29 * @Id: curs_trace.3x,v 1.13 2015/07/20 22:54:44 tom Exp @
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36 <TITLE>curs_trace
3x
</TITLE>
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href=
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38 <meta http-equiv=
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41 <H1 class=
"no-header">curs_trace
3x
</H1>
43 <STRONG><A HREF=
"curs_trace.3x.html">curs_trace(
3x)
</A></STRONG> <STRONG><A HREF=
"curs_trace.3x.html">curs_trace(
3x)
</A></STRONG>
49 <H2><a name=
"h2-NAME">NAME
</a></H2><PRE>
50 <STRONG>_tracef
</STRONG>,
<STRONG>_tracedump
</STRONG>,
<STRONG>_traceattr
</STRONG>,
<STRONG>_traceattr2
</STRONG>,
51 <STRONG>_nc_tracebits
</STRONG>,
<STRONG>_tracecchar_t
</STRONG>,
<STRONG>_tracecchar_t2
</STRONG>,
<STRONG>_tracechar
</STRONG>,
52 <STRONG>_tracechtype
</STRONG>,
<STRONG>_tracechtype2
</STRONG>,
<STRONG>_tracemouse
</STRONG>,
<STRONG>trace
</STRONG> -
<STRONG>curses
</STRONG>
57 <H2><a name=
"h2-SYNOPSIS">SYNOPSIS
</a></H2><PRE>
58 <STRONG>#include
</STRONG> <STRONG><curses.h
></STRONG>
60 <STRONG>void
</STRONG> <STRONG>_tracef(const
</STRONG> <STRONG>char
</STRONG> <STRONG>*
</STRONG><EM>format
</EM><STRONG>,
</STRONG> <STRONG>...);
</STRONG>
61 <STRONG>void
</STRONG> <STRONG>_tracedump(const
</STRONG> <STRONG>char
</STRONG> <STRONG>*
</STRONG><EM>label
</EM><STRONG>,
</STRONG> <STRONG>WINDOW
</STRONG> <STRONG>*
</STRONG><EM>win
</EM><STRONG>);
</STRONG>
62 <STRONG>char
</STRONG> <STRONG>*_traceattr(attr_t
</STRONG> <EM>attr
</EM><STRONG>);
</STRONG>
63 <STRONG>char
</STRONG> <STRONG>*_traceattr2(int
</STRONG> <EM>buffer
</EM><STRONG>,
</STRONG> <STRONG>chtype
</STRONG> <EM>ch
</EM><STRONG>);
</STRONG>
64 <STRONG>char
</STRONG> <STRONG>*_nc_tracebits(void);
</STRONG>
65 <STRONG>char
</STRONG> <STRONG>*
</STRONG> <STRONG>_tracecchar_t(const
</STRONG> <STRONG>cchar_t
</STRONG> <STRONG>*
</STRONG><EM>string
</EM><STRONG>);
</STRONG>
66 <STRONG>char
</STRONG> <STRONG>*
</STRONG> <STRONG>_tracecchar_t2(int
</STRONG> <EM>buffer
</EM><STRONG>,
</STRONG> <STRONG>const
</STRONG> <STRONG>cchar_t
</STRONG> <STRONG>*
</STRONG><EM>string
</EM><STRONG>);
</STRONG>
67 <STRONG>char
</STRONG> <STRONG>*_tracechar(int
</STRONG> <EM>ch
</EM><STRONG>);
</STRONG>
68 <STRONG>char
</STRONG> <STRONG>*_tracechtype(chtype
</STRONG> <EM>ch
</EM><STRONG>);
</STRONG>
69 <STRONG>char
</STRONG> <STRONG>*_tracechtype2(int
</STRONG> <EM>buffer
</EM><STRONG>,
</STRONG> <STRONG>chtype
</STRONG> <EM>ch
</EM><STRONG>);
</STRONG>
70 <STRONG>char
</STRONG> <STRONG>*_tracemouse(const
</STRONG> <STRONG>MEVENT
</STRONG> <STRONG>*
</STRONG><EM>event
</EM><STRONG>);
</STRONG>
71 <STRONG>void
</STRONG> <STRONG>trace(const
</STRONG> <STRONG>unsigned
</STRONG> <STRONG>int
</STRONG> <EM>param
</EM><STRONG>);
</STRONG>
75 <H2><a name=
"h2-DESCRIPTION">DESCRIPTION
</a></H2><PRE>
76 The
<STRONG>trace
</STRONG> routines are used for debugging the ncurses li-
77 braries, as well as applications which use the ncurses li-
78 braries. These functions are normally available only with
79 the debugging library e.g.,
<EM>libncurses
</EM><STRONG>_
</STRONG><EM>g.a
</EM>, but may be
80 compiled into any model (shared, static, profile) by
81 defining the symbol
<STRONG>TRACE
</STRONG>. Additionally, some functions
82 are only available with the wide-character configuration
85 The principal parts of this interface are
87 <STRONG>o
</STRONG> <STRONG>trace
</STRONG>, which selectively enables different tracing
90 <STRONG>o
</STRONG> <STRONG>_tracef
</STRONG>, which writes formatted data to the
<EM>trace
</EM>
93 Calling
<STRONG>trace
</STRONG> with a nonzero parameter opens the file
94 <STRONG>trace
</STRONG> in the current directory for output. The parameter
95 is formed by OR'ing values from the list of
<STRONG>TRACE_
</STRONG><EM>xxx
</EM> def-
96 initions in
<STRONG><curses.h
></STRONG>. These include:
98 <STRONG>TRACE_DISABLE
</STRONG>
101 <STRONG>TRACE_TIMES
</STRONG>
102 trace user and system times of updates.
104 <STRONG>TRACE_TPUTS
</STRONG>
107 <STRONG>TRACE_UPDATE
</STRONG>
108 trace update actions, old
& new screens.
110 <STRONG>TRACE_MOVE
</STRONG>
111 trace cursor movement and scrolling.
113 <STRONG>TRACE_CHARPUT
</STRONG>
114 trace all character outputs.
116 <STRONG>TRACE_ORDINARY
</STRONG>
117 trace all update actions. The old and new screen
118 contents are written to the trace file for each re-
121 <STRONG>TRACE_CALLS
</STRONG>
122 trace all curses calls. The parameters for each call
123 are traced, as well as return values.
125 <STRONG>TRACE_VIRTPUT
</STRONG>
126 trace virtual character puts, i.e., calls to
<STRONG>addch
</STRONG>.
128 <STRONG>TRACE_IEVENT
</STRONG>
129 trace low-level input processing, including timeouts.
131 <STRONG>TRACE_BITS
</STRONG>
132 trace state of TTY control bits.
134 <STRONG>TRACE_ICALLS
</STRONG>
135 trace internal/nested calls.
137 <STRONG>TRACE_CCALLS
</STRONG>
138 trace per-character calls.
140 <STRONG>TRACE_DATABASE
</STRONG>
141 trace read/write of terminfo/termcap data.
143 <STRONG>TRACE_ATTRS
</STRONG>
144 trace changes to video attributes and colors.
146 <STRONG>TRACE_MAXIMUM
</STRONG>
147 maximum trace level, enables all of the separate
150 Some tracing features are enabled whenever the
<STRONG>trace
</STRONG> pa-
151 rameter is nonzero. Some features overlap. The specific
152 names are used as a guideline.
154 The other functions either return a pointer to a string-
155 area (allocated by the corresponding function), or return
156 no value (such as
<STRONG>_tracedump
</STRONG>, which implements the screen
157 dump for
<STRONG>TRACE_UPDATE
</STRONG>). The caller should not free these
158 strings, since the allocation is reused on successive
159 calls. To work around the problem of a single string-area
160 per function, some use a buffer-number parameter, telling
161 the library to allocate additional string-areas.
163 These functions check the
<STRONG>NCURSES_TRACE
</STRONG> environment vari-
164 able, to set the tracing feature as if
<STRONG>trace
</STRONG> was called:
166 filter, initscr, new_prescr, newterm, nofilter,
167 restartterm, ripoffline, setupterm, slk_init, tge-
168 tent, use_env, use_extended_names, use_tioctl
172 <H2><a name=
"h2-RETURN-VALUE">RETURN VALUE
</a></H2><PRE>
173 Routines which return a value are designed to be used as
174 parameters to the
<STRONG>_tracef
</STRONG> routine.
178 <H2><a name=
"h2-PORTABILITY">PORTABILITY
</a></H2><PRE>
179 These functions are not part of the XSI interface. Some
180 other curses implementations are known to have similar,
181 undocumented features, but they are not compatible with
186 <H2><a name=
"h2-SEE-ALSO">SEE ALSO
</a></H2><PRE>
187 <STRONG><A HREF=
"ncurses.3x.html">curses(
3x)
</A></STRONG>.
191 <STRONG><A HREF=
"curs_trace.3x.html">curs_trace(
3x)
</A></STRONG>
195 <li><a href=
"#h2-NAME">NAME
</a></li>
196 <li><a href=
"#h2-SYNOPSIS">SYNOPSIS
</a></li>
197 <li><a href=
"#h2-DESCRIPTION">DESCRIPTION
</a></li>
198 <li><a href=
"#h2-RETURN-VALUE">RETURN VALUE
</a></li>
199 <li><a href=
"#h2-PORTABILITY">PORTABILITY
</a></li>
200 <li><a href=
"#h2-SEE-ALSO">SEE ALSO
</a></li>