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/* $OpenBSD: lib_trace.c,v 1.1 1999/01/18 19:10:23 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
/*
* lib_trace.c - Tracing/Debugging routines
*/
#include <curses.priv.h>
#include <tic.h>
MODULE_ID("$From: lib_trace.c,v 1.30 1998/10/03 23:41:42 tom Exp $")
#include <ctype.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
unsigned _nc_tracing = 0; /* always define this */
#ifdef TRACE
const char *_nc_tputs_trace = "";
long _nc_outchars;
static FILE * tracefp; /* default to writing to stderr */
#endif
void trace(const unsigned int tracelevel GCC_UNUSED)
{
#ifdef TRACE
static bool been_here = FALSE;
static char my_name[] = "trace";
_nc_tracing = tracelevel;
if (! been_here && tracelevel) {
been_here = TRUE;
if (_nc_access(my_name, W_OK) < 0
|| (tracefp = fopen(my_name, "w")) == 0) {
perror("curses: Can't open 'trace' file: ");
exit(EXIT_FAILURE);
}
/* Try to set line-buffered mode, or (failing that) unbuffered,
* so that the trace-output gets flushed automatically at the
* end of each line. This is useful in case the program dies.
*/
#if HAVE_SETVBUF /* ANSI */
(void) setvbuf(tracefp, (char *)0, _IOLBF, 0);
#elif HAVE_SETBUF /* POSIX */
(void) setbuffer(tracefp, (char *)0);
#endif
_tracef("TRACING NCURSES version %s (%d)",
NCURSES_VERSION, NCURSES_VERSION_PATCH);
}
#endif
}
const char *_nc_visbuf2(int bufnum, const char *buf)
/* visibilize a given string */
{
char *vbuf;
char *tp;
int c;
if (buf == 0)
return("(null)");
if (buf == CANCELLED_STRING)
return("(cancelled)");
tp = vbuf = _nc_trace_buf(bufnum, (strlen(buf) * 4) + 5);
*tp++ = '"';
while ((c = *buf++) != '\0') {
if (c == '"') {
*tp++ = '\\'; *tp++ = '"';
} else if (is7bits(c) && (isgraph(c) || c == ' ')) {
*tp++ = c;
} else if (c == '\n') {
*tp++ = '\\'; *tp++ = 'n';
} else if (c == '\r') {
*tp++ = '\\'; *tp++ = 'r';
} else if (c == '\b') {
*tp++ = '\\'; *tp++ = 'b';
} else if (c == '\033') {
*tp++ = '\\'; *tp++ = 'e';
} else if (is7bits(c) && iscntrl(c)) {
*tp++ = '\\'; *tp++ = '^'; *tp++ = '@' + c;
} else {
sprintf(tp, "\\%03o", c & 0xff);
tp += strlen(tp);
}
}
*tp++ = '"';
*tp++ = '\0';
return(vbuf);
}
const char *_nc_visbuf(const char *buf)
{
return _nc_visbuf2(0, buf);
}
#ifdef TRACE
void
_tracef(const char *fmt, ...)
{
static const char Called[] = T_CALLED("");
static const char Return[] = T_RETURN("");
static int level;
va_list ap;
bool before = FALSE;
bool after = FALSE;
int doit = _nc_tracing;
int save_err = errno;
if (strlen(fmt) >= sizeof(Called) - 1) {
if (!strncmp(fmt, Called, sizeof(Called)-1)) {
before = TRUE;
level++;
} else if (!strncmp(fmt, Return, sizeof(Return)-1)) {
after = TRUE;
}
if (before || after) {
if ((level <= 1)
|| (doit & TRACE_ICALLS) != 0)
doit &= (TRACE_CALLS|TRACE_CCALLS);
else
doit = 0;
}
}
if (doit != 0) {
if (tracefp == 0)
tracefp = stderr;
if (before || after) {
int n;
for (n = 1; n < level; n++)
fputs("+ ", tracefp);
}
va_start(ap, fmt);
vfprintf(tracefp, fmt, ap);
fputc('\n', tracefp);
va_end(ap);
fflush(tracefp);
}
if (after && level)
level--;
errno = save_err;
}
/* Trace 'int' return-values */
int _nc_retrace_int(int code)
{
T((T_RETURN("%d"), code));
return code;
}
/* Trace 'char*' return-values */
char * _nc_retrace_ptr(char * code)
{
T((T_RETURN("%s"), _nc_visbuf(code)));
return code;
}
/* Trace 'WINDOW *' return-values */
WINDOW *_nc_retrace_win(WINDOW *code)
{
T((T_RETURN("%p"), code));
return code;
}
#endif /* TRACE */
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