new file mode 100644
--- /dev/null
+++ b/src/ops.h
@@ -0,0 +1,115 @@
+/*
+
+Copyright (C) 1996 John W. Eaton
+
+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, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_ops_h)
+#define octave_ops_h 1
+
+extern void install_ops (void);
+
+#define INSTALL_UNOP(op, t, f) \
+  octave_value_typeinfo::register_unary_op \
+    (octave_value::op, t::static_type_id (), f);
+
+#define INSTALL_BINOP(op, t1, t2, f) \
+  octave_value_typeinfo::register_binary_op \
+    (octave_value::op, t1::static_type_id (), t2::static_type_id (), f);
+
+#define INSTALL_ASSIGNOP(t1, t2, f) \
+  octave_value_typeinfo::register_assign_op \
+    (t1::static_type_id (), t2::static_type_id (), f);
+
+#define INSTALL_ASSIGNCONV(t1, t2, tr) \
+  octave_value_typeinfo::register_pref_assign_conv \
+    (t1::static_type_id (), t2::static_type_id (), tr::static_type_id ());
+
+#define INSTALL_WIDENOP(t1, t2, f) \
+  octave_value_typeinfo::register_widening_op \
+    (t1::static_type_id (), t2::static_type_id (), f);
+
+#define BOOL_OP1(xt, xn, get_x, yt, yn, get_y) \
+  xt xn = get_x; \
+  yt yn = get_y;
+
+#define BOOL_OP2(x) \
+  int nr = x.rows (); \
+  int nc = x.columns ();
+
+#define BOOL_OP3(test) \
+  Matrix retval (nr, nc); \
+  for (int j = 0; j < nc; j++) \
+    for (int i = 0; i < nr; i++) \
+      retval (i, j) = test; \
+  return retval;
+
+#define SC_MX_BOOL_OP(st, sn, get_s, mt, mn, get_m, test) \
+  do \
+    { \
+      BOOL_OP1 (st, sn, get_s, mt, mn, get_m) \
+      BOOL_OP2 (mn) \
+      BOOL_OP3 (test) \
+    } \
+  while (0)
+
+#define MX_SC_BOOL_OP(mt, mn, get_m, st, sn, get_s, test) \
+  do \
+    { \
+      BOOL_OP1 (mt, mn, get_m, st, sn, get_s) \
+      BOOL_OP2 (mn) \
+      BOOL_OP3 (test) \
+    } \
+  while (0)
+
+#define MX_MX_BOOL_OP(m1t, m1n, get_m1, m2t, m2n, get_m2, test, op, \
+		      empty_result) \
+  do \
+    { \
+      BOOL_OP1 (m1t, m1n, get_m1, m2t, m2n, get_m2) \
+      int m1_nr = m1.rows (); \
+      int m1_nc = m1.cols (); \
+      int m2_nr = m2.rows (); \
+      int m2_nc = m2.cols (); \
+      if (m1_nr != m2_nr || m1_nc != m2_nc) \
+	{ \
+	  gripe_nonconformant ("operator " op, m1_nr, m1_nc, m2_nr, m2_nc); \
+	  return Matrix (); \
+	} \
+      if (m1_nr == 0 || m1_nc == 0) \
+	return empty_result; \
+      BOOL_OP2 (m1n) \
+      BOOL_OP3 (test) \
+    } \
+  while (0)
+
+#define CAST_BINOP_ARGS(t1, t2) \
+  t1 v1 = DYNAMIC_CAST (t1, a1); \
+  t2 v2 = DYNAMIC_CAST (t2, a2);
+
+#define CAST_CONV_ARG(t) \
+  t v = DYNAMIC_CAST (t, a);
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/