1 /****************************************************************************
2 * Copyright (c) 1998-2004,2005 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 *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 ****************************************************************************/
36 * lib_trace.c - Tracing/Debugging routines
38 * The _tracef() function is originally from pcurses (by Pavel Curtis) in 1982.
39 * pcurses allowed one to enable/disable tracing using traceon() and traceoff()
40 * functions. ncurses provides a trace() function which allows one to
41 * selectively enable or disable several tracing features.
44 #include <curses.priv.h>
49 MODULE_ID("$Id: lib_trace.c,v 1.59 2006/08/19 12:05:25 tom Exp $")
51 NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */
54 NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = "";
55 NCURSES_EXPORT_VAR(long) _nc_outchars = 0;
57 static FILE *tracefp = 0; /* default to writing to stderr */
60 trace(const unsigned int tracelevel)
62 static bool been_here = FALSE;
63 static char my_name[PATH_MAX];
65 if ((tracefp == 0) && tracelevel) {
66 const char *mode = been_here ? "ab" : "wb";
68 if (*my_name == '\0') {
69 if (getcwd(my_name, sizeof(my_name) - 10) == 0) {
70 perror("curses: Can't get working directory");
73 strcat(my_name, "/trace");
77 _nc_tracing = tracelevel;
78 if (_nc_access(my_name, W_OK) < 0
79 || (tracefp = fopen(my_name, mode)) == 0) {
80 perror("curses: Can't open 'trace' file");
83 /* Try to set line-buffered mode, or (failing that) unbuffered,
84 * so that the trace-output gets flushed automatically at the
85 * end of each line. This is useful in case the program dies.
87 #if HAVE_SETVBUF /* ANSI */
88 (void) setvbuf(tracefp, (char *) 0, _IOLBF, 0);
89 #elif HAVE_SETBUF /* POSIX */
90 (void) setbuffer(tracefp, (char *) 0);
92 _tracef("TRACING NCURSES version %s.%d (tracelevel=%#x)",
94 NCURSES_VERSION_PATCH,
96 } else if (tracelevel == 0) {
101 _nc_tracing = tracelevel;
102 } else if (_nc_tracing != tracelevel) {
103 _nc_tracing = tracelevel;
104 _tracef("tracelevel=%#x", tracelevel);
109 _tracef(const char *fmt,...)
111 static const char Called[] = T_CALLED("");
112 static const char Return[] = T_RETURN("");
117 unsigned doit = _nc_tracing;
118 int save_err = errno;
120 if (strlen(fmt) >= sizeof(Called) - 1) {
121 if (!strncmp(fmt, Called, sizeof(Called) - 1)) {
124 } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) {
127 if (before || after) {
129 || (doit & TRACE_ICALLS) != 0)
130 doit &= (TRACE_CALLS | TRACE_CCALLS);
139 if (before || after) {
141 for (n = 1; n < level; n++)
142 fputs("+ ", tracefp);
145 vfprintf(tracefp, fmt, ap);
146 fputc('\n', tracefp);
156 /* Trace 'bool' return-values */
157 NCURSES_EXPORT(NCURSES_BOOL)
158 _nc_retrace_bool(NCURSES_BOOL code)
160 T((T_RETURN("%s"), code ? "TRUE" : "FALSE"));
164 /* Trace 'int' return-values */
166 _nc_retrace_int(int code)
168 T((T_RETURN("%d"), code));
172 /* Trace 'unsigned' return-values */
173 NCURSES_EXPORT(unsigned)
174 _nc_retrace_unsigned(unsigned code)
176 T((T_RETURN("%#x"), code));
180 /* Trace 'char*' return-values */
181 NCURSES_EXPORT(char *)
182 _nc_retrace_ptr(char *code)
184 T((T_RETURN("%s"), _nc_visbuf(code)));
188 /* Trace 'const char*' return-values */
189 NCURSES_EXPORT(const char *)
190 _nc_retrace_cptr(const char *code)
192 T((T_RETURN("%s"), _nc_visbuf(code)));
196 /* Trace 'NCURSES_CONST void*' return-values */
197 NCURSES_EXPORT(NCURSES_CONST void *)
198 _nc_retrace_cvoid_ptr(NCURSES_CONST void *code)
200 T((T_RETURN("%p"), code));
204 /* Trace 'void*' return-values */
205 NCURSES_EXPORT(void *)
206 _nc_retrace_void_ptr(void *code)
208 T((T_RETURN("%p"), code));
212 /* Trace 'SCREEN *' return-values */
213 NCURSES_EXPORT(SCREEN *)
214 _nc_retrace_sp(SCREEN *code)
216 T((T_RETURN("%p"), code));
220 /* Trace 'WINDOW *' return-values */
221 NCURSES_EXPORT(WINDOW *)
222 _nc_retrace_win(WINDOW *code)
224 T((T_RETURN("%p"), code));