# HG changeset patch
# User jwe
# Date 1143722930 0
# Node ID 8272a8f03b80f7fe4ef9731ec199a51a830d293a
# Parent  bd39bbda9bd9369755d8dcfdc3c01c69345a02d0
[project @ 2006-03-30 12:48:50 by jwe]

diff --git a/src/ChangeLog b/src/ChangeLog
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2006-03-30  David Bateman  <dbateman@free.fr>
+
+	* DLD-FUNCTIONS/fftw_wisdom.cc: Don't attempt to save wisdom to
+	an empty filename or invalid filename.
+
 2006-03-28  John W. Eaton  <jwe@octave.org>
 
 	* DLD-FUNCTIONS/matrix_type.cc: Update copyright notice and FSF
diff --git a/src/DLD-FUNCTIONS/fftw_wisdom.cc b/src/DLD-FUNCTIONS/fftw_wisdom.cc
--- a/src/DLD-FUNCTIONS/fftw_wisdom.cc
+++ b/src/DLD-FUNCTIONS/fftw_wisdom.cc
@@ -108,18 +108,28 @@
 	    overwrite = true;
 	}
 
+      std::string str = args(0).string_value ();
       std::string wisdom = octave_env::make_absolute
-	(Vload_path_dir_path.find_first_of (args(0).string_value ()),
-	 octave_env::getcwd ());
+	(Vload_path_dir_path.find_first_of (str), octave_env::getcwd ());
 
       // XXX FIXME XXX -- should probably protect FILE* resources with
       // auto_ptr or similar...
 
       if (wisdom.empty () || overwrite)
 	{
-	  FILE *ofile = fopen (wisdom.c_str (), "wb");
-	  fftw_export_wisdom_to_file (ofile);
-	  fclose (ofile);
+	  if (str.empty ())
+	    error ("fftw_wisdom: can not save to file");
+	  else
+	    {
+	      FILE *ofile = fopen (str.c_str (), "wb");
+	      if (! ofile)
+		error ("fftw_wisdom: can not save to file %s", str.c_str());
+	      else
+		{
+		  fftw_export_wisdom_to_file (ofile);
+		  fclose (ofile);
+		}
+	    }
 	}
       else
 	{