1 /****************************************************************************
2 * Copyright (c) 1998,1999,2000,2001 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 1.48 2001/10/20 20:35:25 tom Exp $")
45 NCURSES_EXPORT_VAR(unsigned)
46 _nc_tracing = 0; /* always define this */
49 NCURSES_EXPORT_VAR(const char *)
51 NCURSES_EXPORT_VAR(long)
54 static FILE *tracefp; /* default to writing to stderr */
57 trace(const unsigned int tracelevel GCC_UNUSED)
59 static bool been_here = FALSE;
60 static char my_name[] = "trace";
62 if (!been_here && tracelevel) {
65 _nc_tracing = tracelevel;
66 if (_nc_access(my_name, W_OK) < 0
67 || (tracefp = fopen(my_name, "wb")) == 0) {
68 perror("curses: Can't open 'trace' file: ");
71 /* Try to set line-buffered mode, or (failing that) unbuffered,
72 * so that the trace-output gets flushed automatically at the
73 * end of each line. This is useful in case the program dies.
75 #if HAVE_SETVBUF /* ANSI */
76 (void) setvbuf(tracefp, (char *) 0, _IOLBF, 0);
77 #elif HAVE_SETBUF /* POSIX */
78 (void) setbuffer(tracefp, (char *) 0);
80 _tracef("TRACING NCURSES version %s (tracelevel=%#x)",
81 curses_version(), tracelevel);
82 } else if (_nc_tracing != tracelevel) {
83 _nc_tracing = tracelevel;
84 _tracef("tracelevel=%#x", tracelevel);
89 _tracef(const char *fmt,...)
91 static const char Called[] = T_CALLED("");
92 static const char Return[] = T_RETURN("");
97 int doit = _nc_tracing;
100 if (strlen(fmt) >= sizeof(Called) - 1) {
101 if (!strncmp(fmt, Called, sizeof(Called) - 1)) {
104 } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) {
107 if (before || after) {
109 || (doit & TRACE_ICALLS) != 0)
110 doit &= (TRACE_CALLS | TRACE_CCALLS);
119 if (before || after) {
121 for (n = 1; n < level; n++)
122 fputs("+ ", tracefp);
125 vfprintf(tracefp, fmt, ap);
126 fputc('\n', tracefp);
136 /* Trace 'int' return-values */
138 _nc_retrace_int(int code)
140 T((T_RETURN("%d"), code));
144 /* Trace 'char*' return-values */
145 NCURSES_EXPORT(char *)
146 _nc_retrace_ptr(char *code)
148 T((T_RETURN("%s"), _nc_visbuf(code)));
152 /* Trace 'SCREEN *' return-values */
153 NCURSES_EXPORT(SCREEN *)
154 _nc_retrace_sp(SCREEN * code)
156 T((T_RETURN("%p"), code));
160 /* Trace 'WINDOW *' return-values */
161 NCURSES_EXPORT(WINDOW *)
162 _nc_retrace_win(WINDOW *code)
164 T((T_RETURN("%p"), code));