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/*
* Determines whether a given number of points N is allowed by the
* Fast Fourier Transform algorithm of fftw, i.e. if
*
* N = 2*p and N >= 4
*
*/
/*
* Copyright (c) 1999-2001 Eric Gourgoulhon
*
* This file is part of LORENE.
*
* LORENE 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 of the License, or
* (at your option) any later version.
*
* LORENE 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 LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
char admissible_fft_C[] = "$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFTW3/admissible_fft.C,v 1.2 2014/10/13 08:53:18 j_novak Exp $" ;
/*
* $Id: admissible_fft.C,v 1.2 2014/10/13 08:53:18 j_novak Exp $
* $Log: admissible_fft.C,v $
* Revision 1.2 2014/10/13 08:53:18 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.1 2004/12/21 17:06:02 j_novak
* Added all files for using fftw3.
*
* Revision 1.1.1.1 2001/11/20 15:19:29 e_gourgoulhon
* LORENE
*
* Revision 1.1 1999/11/24 16:06:52 eric
* Initial revision
*
*
* $Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFTW3/admissible_fft.C,v 1.2 2014/10/13 08:53:18 j_novak Exp $
*
*/
namespace Lorene {
bool admissible_fft(int n) {
if (n < 4) {
return false ;
}
// Division by 2
//--------------
int reste = n % 2 ;
if (reste != 0) {
return false ;
}
return true ;
}
}
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