re PR libfortran/32456 (IO error message should show Unit/Filename)

2007-06-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/32456
	* io/unit.c (filename_from_unit): Don't use find_unit, instead search
	for unit directly.

From-SVN: r126119

libgfortran/ChangeLog

+2007-06-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libgfortran/32456
+	* io/unit.c (filename_from_unit): Don't use find_unit, instead search
+	for unit directly.
+
 2007-06-24  Adam Nemet  <anemet@caviumnetworks.com>
 
 	PR libfortran/32495

libgfortran/io/unit.c

@@ -690,11 +690,26 @@ update_position (gfc_unit *u)
    must free memory allocated for the filename string.  */
 
 char *
-filename_from_unit (int unit_number)
+filename_from_unit (int n)
 {
   char *filename;
-  gfc_unit *u = NULL;
-  u = find_unit (unit_number);
+  gfc_unit *u;
+  int c;
+
+  /* Find the unit.  */
+  u = unit_root;
+  while (u != NULL)
+    {
+      c = compare (n, u->unit_number);
+      if (c < 0)
+	u = u->left;
+      if (c > 0)
+	u = u->right;
+      if (c == 0)
+	break;
+    }
+
+  /* Get the filename.  */
   if (u != NULL)
     {
       filename = (char *) get_mem (u->file_len + 1);
@@ -703,4 +718,5 @@ filename_from_unit (int unit_number)
     }
   else
     return (char *) NULL;
-}
+}
\ No newline at end of file
+