praat/external/gsl/gsl_fft__real_unpack.c

/* fft/real_unpack.c
 * 
 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough
 * 
 * This program 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 3 of the License, or (at
 * your option) any later version.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include "gsl_fft__complex_internal.h"

int
FUNCTION(gsl_fft_real,unpack) (const BASE real_coefficient[],
                               BASE complex_coefficient[],
                               const size_t stride, const size_t n)
{
  size_t i;

  if (n == 0)
    {
      GSL_ERROR ("length n must be positive integer", GSL_EDOM);
    }

  for (i = 0; i < n; i++)
    {
      REAL(complex_coefficient,stride,i) = real_coefficient[i * stride];
      IMAG(complex_coefficient,stride,i) = 0.0;
    }

  return 0;

}