--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/DLD-FUNCTIONS/__dsearchn__.cc	Fri Aug 24 08:27:29 2007 +0000
@@ -0,0 +1,108 @@
+/*
+
+Copyright (C) 2007 David Bateman <dbateman@free.fr>
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+Octave 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
+
+*/
+
+#include <iostream>
+#include <fstream>
+#include <cmath>
+#include <string>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "oct.h"
+
+DEFUN_DLD (__dsearchn__, args, ,
+	"-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {[@var{idx}, @var{d}] =} dsearch (@var{x}, @var{xi})\n\
+Internal function for dsearchn.\n\
+@end deftypefn")
+{
+  int nargin = args.length();
+  octave_value_list retval;
+
+  if (nargin != 2)
+    {
+      print_usage ();
+      return retval;
+    }
+
+  Matrix x = args(0).matrix_value().transpose ();
+  Matrix xi = args(1).matrix_value().transpose ();
+
+  if (! error_state)
+    {
+      if (x.rows() != xi.rows() || x.columns() < 1)
+	error ("__dsearch__: dimensional mismatch.");
+      else
+	{
+	  octave_idx_type n = x.rows();
+	  octave_idx_type nx = x.columns();
+	  octave_idx_type nxi = xi.columns();
+
+	  ColumnVector idx (nxi);
+	  double *pidx = idx.fortran_vec ();
+	  ColumnVector dist (nxi);
+	  double *pdist = dist.fortran_vec ();
+
+#define DIST(dd, y, yi, m) \
+  dd = 0.; \
+  for (octave_idx_type k = 0; k < m; k++) \
+   { \
+     double yd = y[k] - yi[k]; \
+     dd += yd * yd; \
+   } \
+  dd = sqrt (dd);
+
+	  const double *pxi = xi.fortran_vec ();
+	  for (octave_idx_type i = 0; i < nxi; i++)
+	    {
+	      double d0;
+	      const double *px = x.fortran_vec ();
+	      DIST(d0, px, pxi, n);
+	      *pidx = 1.;
+	      for (octave_idx_type j = 1; j < nx; j++)
+		{
+		  px += n;
+		  double d;
+		  DIST (d, px, pxi, n);
+		  if (d < d0)
+		    {
+		      d0 = d;
+		      *pidx = static_cast<double>(j + 1);
+		    }
+		  OCTAVE_QUIT;
+ 		}
+
+	      *pdist++ = d0; 
+	      pidx++;
+	      pxi += n;
+	    }
+
+	  retval(1) = dist;
+	  retval(0) = idx;
+	}
+    }
+
+  return retval;
+}