external/bsd/nvi/dist/common/trace.c

   1 /*      $NetBSD: trace.c,v 1.4 2014/01/26 21:43:45 christos Exp $       */
   2 /*-
   3  * Copyright (c) 1996
   4  *      Rob Zimmermann.  All rights reserved.
   5  * Copyright (c) 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 static const char sccsid[] = "Id: trace.c,v 8.4 1997/08/03 15:04:23 bostic Exp  (Berkeley) Date: 1997/08/03 15:04:23 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: trace.c,v 1.4 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/queue.h>
  23
  24 #include <bitstring.h>
  25 #include <stdio.h>
  26
  27 #ifdef __STDC__
  28 #include <stdarg.h>
  29 #else
  30 #include <varargs.h>
  31 #endif
  32
  33 #include "common.h"
  34
  35 #ifdef TRACE
  36
  37 static FILE *tfp;
  38
  39 /*
  40  * vtrace_end --
  41  *      End tracing.
  42  *
  43  * PUBLIC: void vtrace_end __P((void));
  44  */
  45 void
  46 vtrace_end(void)
  47 {
  48         if (tfp != NULL && tfp != stderr)
  49                 (void)fclose(tfp);
  50 }
  51
  52 /*
  53  * vtrace_init --
  54  *      Initialize tracing.
  55  *
  56  * PUBLIC: void vtrace_init __P((const char *));
  57  */
  58 void
  59 vtrace_init(const char *name)
  60 {
  61         if (name == NULL || (tfp = fopen(name, "w")) == NULL)
  62                 tfp = stderr;
  63         vtrace("\n=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\nTRACE\n");
  64 }
  65
  66 /*
  67  * vtrace --
  68  *      Debugging trace routine.
  69  *
  70  * PUBLIC: void vtrace __P((const char *, ...));
  71  */
  72 void
  73 vtrace(const char *fmt, ...)
  74 {
  75         va_list ap;
  76
  77         if (tfp == NULL)
  78                 vtrace_init(NULL);
  79
  80         va_start(ap, fmt);
  81         (void)vfprintf(tfp, fmt, ap);
  82         va_end(ap);
  83
  84         (void)fflush(tfp);
  85 }
  86 #endif