Fix id reference counting

* include/mailutils/locus.h: Add copyleft.
(mu_ident_stat): New proto.
* include/mailutils/types.hin (mu_locus_DEPRECATED): Update commit.
Include link to the wiki article.
* include/mailutils/yyloc.h: Add copyleft.
* libmailutils/locus/ident.c (mu_ident_stat): New function.
* libmailutils/locus/locus.c (mu_locus_point_init)
(mu_locus_point_copy): Don't touch destination unless setting
mu_file member succeeds.
(mu_locus_range_copy): deinitialize dest before assignment.
* libmailutils/stream/logstream.c (_log_write): Use mu_locus_range_copy
to save locus.
(mu_ioctl_logstream_get_locus_deprecated)
(mu_ioctl_logstream_set_locus_deprecated): Include link to the
wiki article.
* libmailutils/tests/linetrack.c (main): Destroy tracker before exiting.
* libmailutils/tests/logstr.c: Make it possible to run selected tests.

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2017 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see
+   <http://www.gnu.org/licenses/>. */
+
 #ifndef _MAILUTILS_LOCUS_H
 #define _MAILUTILS_LOCUS_H
 
@@ -34,6 +51,7 @@ struct mu_linetrack_stat
   
 int mu_ident_ref (char const *name, char const **refname);
 int mu_ident_deref (char const *);
+void mu_ident_stat (mu_stream_t str);
 
 int mu_locus_point_set_file (struct mu_locus_point *pt, const char *filename);
 int mu_locus_point_init (struct mu_locus_point *pt, const char *filename);
@@ -60,9 +78,6 @@ mu_locus_point_same_line (struct mu_locus_point const *a,
   return mu_locus_point_same_file (a, b) && a->mu_line == b->mu_line;
 }
 
-void mu_lrange_debug (struct mu_locus_range const *loc,
-		      char const *fmt, ...);
-
 int mu_linetrack_create (mu_linetrack_t *ret,
 			   char const *file_name, size_t max_lines);
 int mu_linetrack_rebase (mu_linetrack_t trk, struct mu_locus_point const *pt);

@@ -155,7 +155,11 @@ typedef unsigned int mu_debug_level_t;
    <mailutils/locus.h>. 
 
    This definition is provided for backward compatibility.  Authors are
-   urged to switch to the new API as soon as their time permits. */
+   urged to switch to the new API as soon as their time permits.
+
+   Please see http://mailutils.org/wiki/Source_location_API#Deprecated_interface
+   for detailed guidelines.
+*/
 struct mu_locus_DEPRECATED
 {
   char *mu_file;

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2017 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see
+   <http://www.gnu.org/licenses/>. */
+
+#ifndef _MAILUTILS_YYLOC_H
+#define _MAILUTILS_YYLOC_H
+
 void mu_file_print_locus_point (FILE *,
 				struct mu_locus_point const *lpt);
 void mu_file_print_locus_range (FILE *,
@@ -18,8 +38,9 @@ void mu_file_print_locus_range (FILE *,
 	  (Current).end = (Current).beg;			  \
 	}							  \
     } while (0)
+
 #define YY_LOCATION_PRINT(File, Loc)     		        \
   mu_file_print_locus_range (File, &(Loc))
 
-    
+#endif    
   

@@ -23,6 +23,9 @@
 #include <mailutils/errno.h>
 #include <mailutils/diag.h>
 #include <mailutils/list.h>
+#include <mailutils/io.h>
+#include <mailutils/stream.h>
+#include <mailutils/iterator.h>
 
 struct mu_ident_ref
 {
@@ -111,5 +114,39 @@ mu_ident_deref (char const *name)
   return 0;
 }
   
+void
+mu_ident_stat (mu_stream_t str)
+{
+  size_t count, i;
+  mu_iterator_t itr;
+  
+  mu_stream_printf (str, "BEGIN IDENT STAT\n");
 
+  mu_assoc_count (nametab, &count);
+  mu_stream_printf (str, "N=%zu\n", count);
+
+  if (count > 0)
+    {
+      int rc = mu_assoc_get_iterator (nametab, &itr);
+      if (rc)
+	mu_stream_printf (str, "mu_assoc_get_iterator: %s\n",
+			  mu_strerror (rc));
+      else
+	{
+	  i = 0;
+	  for (mu_iterator_first (itr); !mu_iterator_is_done (itr);
+	       mu_iterator_next (itr), i)
+	    {
+	      const char *key;
+	      struct mu_ident_ref *ref;
+	      
+	      mu_iterator_current_kv (itr,
+				      (const void **)&key, (void **)&ref);  
+	      mu_stream_printf (str, "%04zu: %s: %zu\n", i, key, ref->count);
+	    }
+	}
+      mu_iterator_destroy (&itr);
+    }
+  mu_stream_printf (str, "END IDENT STAT\n");
+}
 

@@ -20,6 +20,7 @@
 #include <mailutils/types.h>
 #include <mailutils/locus.h>
 #include <mailutils/error.h>
+#include <mailutils/errno.h>
 
 int
 mu_locus_point_set_file (struct mu_locus_point *pt, const char *filename)
@@ -38,9 +39,13 @@ mu_locus_point_set_file (struct mu_locus_point *pt, const char *filename)
 int
 mu_locus_point_init (struct mu_locus_point *pt, const char *filename)
 {
+  int rc = mu_locus_point_set_file (pt, filename);
+  if (rc == 0)
+    {
       pt->mu_line = 0;
       pt->mu_col = 0;
-  return mu_locus_point_set_file (pt, filename);
+    }
+  return rc;
 }
 
 void
@@ -54,9 +59,13 @@ int
 mu_locus_point_copy (struct mu_locus_point *dest,
 		     struct mu_locus_point const *src)
 {
+  int rc = mu_locus_point_set_file (dest, src->mu_file);
+  if (rc == 0)
+    {
       dest->mu_col = src->mu_col;
       dest->mu_line = src->mu_line;
-  return mu_locus_point_set_file (dest, src->mu_file);
+    }
+  return rc;
 }
 
 int
@@ -66,6 +75,9 @@ mu_locus_range_copy (struct mu_locus_range *dest,
   int rc;
   struct mu_locus_range tmp = MU_LOCUS_RANGE_INITIALIZER;
 
+  if (!dest)
+    return MU_ERR_OUT_PTR_NULL;
+    
   rc = mu_locus_point_copy (&tmp.beg, &src->beg);
   if (rc == 0)
     {
@@ -73,8 +85,11 @@ mu_locus_range_copy (struct mu_locus_range *dest,
       if (rc)
 	mu_locus_point_deinit (&tmp.beg);
       else
+	{
+	  mu_locus_range_deinit (dest);
 	  *dest = tmp;
 	}
+    }
   return rc;
 }
 

@@ -258,11 +258,7 @@ _log_write (struct _mu_stream *str, const char *buf, size_t size,
     severity = MU_LOG_EMERG;
 
   if (save_locus)
-    {
-      sp->locrange = loc;
-      mu_ident_ref (sp->locrange.beg.mu_file, &sp->locrange.beg.mu_file);
-      mu_ident_ref (sp->locrange.end.mu_file, &sp->locrange.end.mu_file);
-    }
+    mu_locus_range_copy (&sp->locrange, &loc);
   
   if (severity < sp->threshold)
     rc = 0;
@@ -649,6 +645,8 @@ mu_log_stream_create (mu_stream_t *pstr, mu_stream_t transport)
   return 0;
 }
 
+static char wiki_url[] = "http://mailutils.org/wiki/Source_location_API#Deprecated_interface";
+
 int
 mu_ioctl_logstream_get_locus_deprecated (void)
 {
@@ -656,6 +654,7 @@ mu_ioctl_logstream_get_locus_deprecated (void)
   if (!warned)
     {
       mu_error (_("the program uses MU_IOCTL_LOGSTREAM_GET_LOCUS, which is deprecated"));
+      mu_error (_("please see %s, for detailed guidelines"), wiki_url);
       warned = 1;
     }
   return MU_IOCTL_LOGSTREAM_GET_LOCUS_DEPRECATED;
@@ -668,6 +667,7 @@ mu_ioctl_logstream_set_locus_deprecated (void)
   if (!warned)
     {
       mu_error (_("program uses MU_IOCTL_LOGSTREAM_SET_LOCUS, which is deprecated"));
+      mu_error (_("please see %s, for detailed guidelines"), wiki_url);
       warned = 1;
     }
   return MU_IOCTL_LOGSTREAM_SET_LOCUS_DEPRECATED;

@@ -59,6 +59,7 @@ main (int argc, char **argv)
 	}
       mu_locus_range_deinit (&lr);
     }
+  mu_linetrack_destroy (&trk);
   return 0;
 }
 

@@ -629,6 +629,7 @@ struct testcase
 {
   char const *id;
   void (*handler) (mu_stream_t);
+  int enabled;
 };
 
 struct testcase testcases[] = {
@@ -689,18 +690,38 @@ main (int argc, char **argv)
   mu_stream_t log;
   struct testcase *tp;
   int i;
+  int ena = 0;
   
   mu_set_program_name (argv[0]);
   mu_stdstream_setup (MU_STDSTREAM_RESET_NONE);
 
+  if (argc > 1)
+    {
+      ena = 1;
+      for (i = 1; i < argc; i++)
+	{
+	  char *p;
+	  int n = strtol (argv[i], &p, 10);
+	  if (! (*p == 0 && n >= 0) )
+	    {
+	      mu_error ("erroneous argument %s\n", argv[i]);
+	      return 1;
+	    }
+	  testcases[n].enabled = ena;
+	}
+    }
+
   log = create_log ();
 
   for (i = 0, tp = testcases; tp->id; tp++, i++)
     {
+      if (tp->enabled == ena)
+	{
 	  mu_stream_printf (log, "%02d. %s\n", i, tp->id);
 	  tp->handler (log);
 	  log_reset (log);
 	}
+    }
   
   return 0;
 }