bluestein.h

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00001 /*
00002  *  This file is part of libfftpack.
00003  *
00004  *  libfftpack is free software; you can redistribute it and/or modify
00005  *  it under the terms of the GNU General Public License as published by
00006  *  the Free Software Foundation; either version 2 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  libfftpack is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU General Public License
00015  *  along with libfftpack; if not, write to the Free Software
00016  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00017  */
00018 
00019 /*
00020  *  libfftpack is being developed at the Max-Planck-Institut fuer Astrophysik
00021  *  and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
00022  *  (DLR).
00023  */
00024 
00025 /*! \file bluestein.h
00026  *  Interface for the Bluestein algorithm
00027  *
00028  *  Copyright (C) 2005 Max-Planck-Society
00029  *  \author Martin Reinecke
00030  */
00031 
00032 #ifndef PLANCK_BLUESTEIN_H
00033 #define PLANCK_BLUESTEIN_H
00034 
00035 #include "c_utils.h"
00036 
00037 #ifdef __cplusplus
00038 extern "C" {
00039 #endif
00040 
00041 size_t prime_factor_sum (size_t n);
00042 
00043 void bluestein_i (size_t n, double **tstorage, size_t *worksize);
00044 void bluestein (size_t n, double *data, double *tstorage, int isign);
00045 
00046 #ifdef __cplusplus
00047 }
00048 #endif
00049 
00050 #endif

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