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/* $OpenBSD: lib_trace.c,v 1.2 1997/12/03 05:21:36 millert Exp $ */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
* lib_trace.c - Tracing/Debugging routines
*/
#ifndef TRACE
#define TRACE /* turn on internal defs for this module */
#endif
#include <curses.priv.h>
MODULE_ID("Id: lib_trace.c,v 1.24 1997/11/30 00:47:42 tom Exp $")
#include <ctype.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
unsigned _nc_tracing = 0;
const char *_nc_tputs_trace = "";
long _nc_outchars;
int _nc_optimize_enable = OPTIMIZE_ALL;
static FILE * tracefp; /* default to writing to stderr */
void trace(const unsigned int tracelevel)
{
static bool been_here = FALSE;
_nc_tracing = tracelevel;
if (! been_here && tracelevel) {
been_here = TRUE;
if ((tracefp = fopen("trace", "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);
}
}
const char *_nc_visbuf2(int bufnum, const char *buf)
/* visibilize a given string */
{
char *vbuf;
char *tp;
int c;
if (buf == 0)
return("(null)");
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);
}
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;
}
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