// tc-ifft.cc -*- C++ -*- /* Copyright (C) 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifdef __GNUG__ #pragma implementation #endif #include "Matrix.h" #include "tree-const.h" #include "user-prefs.h" #include "gripes.h" #include "error.h" #ifdef WITH_DLD tree_constant * builtin_ifft_2 (tree_constant *args, int nargin, int nargout) { tree_constant *retval = new tree_constant [2]; retval[0] = ifft (args[1]); return retval; } #endif tree_constant ifft (tree_constant& a) { tree_constant retval; tree_constant tmp = a.make_numeric ();; if (tmp.rows () == 0 || tmp.columns () == 0) { int flag = user_pref.propagate_empty_matrices; if (flag != 0) { if (flag < 0) gripe_empty_arg ("ifft", 0); Matrix m; retval = tree_constant (m); } else gripe_empty_arg ("ifft", 1); return retval; } switch (tmp.const_type ()) { case tree_constant_rep::matrix_constant: { Matrix m = tmp.matrix_value (); ComplexMatrix mifft = m.ifourier (); retval = tree_constant (mifft); } break; case tree_constant_rep::complex_matrix_constant: { ComplexMatrix m = tmp.complex_matrix_value (); ComplexMatrix mifft = m.ifourier (); retval = tree_constant (mifft); } break; case tree_constant_rep::scalar_constant: case tree_constant_rep::complex_scalar_constant: error ("ifft: invalid scalar arguement"); break; default: panic_impossible (); break; } return retval; } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; page-delimiter: "^/\\*" *** ;;; End: *** */