lib/libcurses/ctrace.c

   1 /*      $NetBSD: ctrace.c,v 1.20 2009/01/17 15:25:36 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)ctrace.c    8.2 (Berkeley) 10/5/93";
  36 #else
  37 __RCSID("$NetBSD: ctrace.c,v 1.20 2009/01/17 15:25:36 christos Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #ifdef DEBUG
  42 #include <stdarg.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45
  46 #include <sys/time.h>
  47 #include <string.h>
  48
  49 #include "curses.h"
  50 #include "curses_private.h"
  51
  52 static FILE *tracefp = NULL;            /* Curses debugging file descriptor. */
  53
  54 static int tracemask;   /* Areas of trace output we want. */
  55
  56 static int init_done = 0;
  57
  58 void
  59 __CTRACE_init()
  60 {
  61         char *tf, *tm;
  62
  63         tm = getenv("CURSES_TRACE_MASK");
  64         if (tm == NULL)
  65                 tracemask = __CTRACE_ALL;
  66         else {
  67                 tracemask = (int) strtol(tm, NULL, 0);
  68         }
  69         if (tracemask < 0)
  70                 tracemask = (0 - tracemask) ^ __CTRACE_ALL;
  71         if (tracemask == 0)
  72                 return;
  73
  74         tf = getenv("CURSES_TRACE_FILE");
  75
  76         if ((tf != NULL) && !strcmp( tf, "<none>"))
  77                 tf = NULL;
  78
  79         if (tf != NULL)
  80                 tracefp = fopen(tf, "w");
  81
  82         init_done = 1;
  83         __CTRACE(__CTRACE_ALL, "Trace mask: 0x%08x\n", tracemask);
  84 }
  85
  86 void
  87 __CTRACE(int area, const char *fmt,...)
  88 {
  89         struct timeval tv;
  90         static int seencr = 1;
  91         va_list ap;
  92
  93         if (!init_done)
  94                 __CTRACE_init();
  95         if (tracefp == NULL || !(tracemask & area)) {
  96                 return;
  97         }
  98         gettimeofday(&tv, NULL);
  99         if (seencr && (tracemask & __CTRACE_TSTAMP)) {
 100                 gettimeofday(&tv, NULL);
 101                 (void) fprintf(tracefp, "%llu.%06lu: ",
 102                     (long long)tv.tv_sec, (long)tv.tv_usec);
 103         }
 104         va_start(ap, fmt);
 105         (void) vfprintf(tracefp, fmt, ap);
 106         seencr = (strchr(fmt, '\n') != NULL);
 107         va_end(ap);
 108         (void) fflush(tracefp);
 109 }
 110 #else
 111 /* this kills the empty translation unit message from lint... */
 112 void
 113 __cursesi_make_lint_shut_up_if_debug_not_defined(void);
 114
 115 void
 116 __cursesi_make_lint_shut_up_if_debug_not_defined(void)
 117 {
 118         return;
 119 }
 120 #endif