1 /****************************************************************************
2 * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
35 * lib_trace.c - Tracing/Debugging routines
38 #include <curses.priv.h>
43 MODULE_ID("$Id: lib_trace.c,v 1.50 2002/10/12 15:20:15 tom Exp $")
45 NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */
48 NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = "";
49 NCURSES_EXPORT_VAR(long) _nc_outchars = 0;
51 static FILE *tracefp; /* default to writing to stderr */
54 trace(const unsigned int tracelevel GCC_UNUSED)
56 static bool been_here = FALSE;
57 static char my_name[] = "trace";
59 if (!been_here && tracelevel) {
62 _nc_tracing = tracelevel;
63 if (_nc_access(my_name, W_OK) < 0
64 || (tracefp = fopen(my_name, "wb")) == 0) {
65 perror("curses: Can't open 'trace' file: ");
68 /* Try to set line-buffered mode, or (failing that) unbuffered,
69 * so that the trace-output gets flushed automatically at the
70 * end of each line. This is useful in case the program dies.
72 #if HAVE_SETVBUF /* ANSI */
73 (void) setvbuf(tracefp, (char *) 0, _IOLBF, 0);
74 #elif HAVE_SETBUF /* POSIX */
75 (void) setbuffer(tracefp, (char *) 0);
77 _tracef("TRACING NCURSES version %s (tracelevel=%#x)",
78 curses_version(), tracelevel);
79 } else if (_nc_tracing != tracelevel) {
80 _nc_tracing = tracelevel;
81 _tracef("tracelevel=%#x", tracelevel);
86 _tracef(const char *fmt,...)
88 static const char Called[] = T_CALLED("");
89 static const char Return[] = T_RETURN("");
94 int doit = _nc_tracing;
97 if (strlen(fmt) >= sizeof(Called) - 1) {
98 if (!strncmp(fmt, Called, sizeof(Called) - 1)) {
101 } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) {
104 if (before || after) {
106 || (doit & TRACE_ICALLS) != 0)
107 doit &= (TRACE_CALLS | TRACE_CCALLS);
116 if (before || after) {
118 for (n = 1; n < level; n++)
119 fputs("+ ", tracefp);
122 vfprintf(tracefp, fmt, ap);
123 fputc('\n', tracefp);
133 /* Trace 'bool' return-values */
134 NCURSES_EXPORT(NCURSES_BOOL)
135 _nc_retrace_bool(NCURSES_BOOL code)
137 T((T_RETURN("%s"), code ? "TRUE" : "FALSE"));
141 /* Trace 'int' return-values */
143 _nc_retrace_int(int code)
145 T((T_RETURN("%d"), code));
149 /* Trace 'unsigned' return-values */
150 NCURSES_EXPORT(unsigned)
151 _nc_retrace_unsigned(unsigned code)
153 T((T_RETURN("%#x"), code));
157 /* Trace 'char*' return-values */
158 NCURSES_EXPORT(char *)
159 _nc_retrace_ptr(char *code)
161 T((T_RETURN("%s"), _nc_visbuf(code)));
165 /* Trace 'SCREEN *' return-values */
166 NCURSES_EXPORT(SCREEN *)
167 _nc_retrace_sp(SCREEN * code)
169 T((T_RETURN("%p"), code));
173 /* Trace 'WINDOW *' return-values */
174 NCURSES_EXPORT(WINDOW *)
175 _nc_retrace_win(WINDOW *code)
177 T((T_RETURN("%p"), code));