guide34/html/fpt_8h_source.html

 /*

  * Copyright (c) 2002, 2017 Jens Keiner, Stefan Kunis, Daniel Potts

  *

  * 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 2 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.

  */


 #ifndef _FPT_H_

 #define _FPT_H_


 typedef struct fpt_step_

 {

   bool stable;

   int Ns;

   int ts;

   double **a11,**a12,**a21,**a22;

   double *g;

 } fpt_step;


 typedef struct fpt_data_

 {

   fpt_step **steps;

   int k_start;

   double *alphaN;

   double *betaN;

   double *gammaN;

   double alpha_0;

   double beta_0;

   double gamma_m1;

   /* Data for direct transform. */

   double *alpha;

   double *beta;

   double *gamma;

 } fpt_data;


 typedef struct fpt_set_s_

 {

   unsigned int flags;

   int M;

   int N;

   int t;

   fpt_data *dpt;

   double **xcvecs;

   double *xc;

   double _Complex *temp;

   double _Complex *work;

   double _Complex *result;

   double _Complex *vec3;

   double _Complex *vec4;

   double _Complex *z;

   fftw_plan *plans_dct3;

   fftw_plan *plans_dct2;

   fftw_r2r_kind *kinds;

   fftw_r2r_kind *kindsr;

   int *lengths;

   /* Data for slow transforms. */

   double *xc_slow;

 } fpt_set_s;


 #endif /*_FPT_H_*/

fpt_step_
Holds data for a single multiplication step in the cascade summation.
Definition: fpt.c:61

fpt_set_s_::xc
double * xc
Array for Chebychev-nodes.
Definition: fpt.c:105

fpt_data_::alpha
double * alpha
< TODO Add comment here.
Definition: fpt.h:50

fpt_step_::stable
bool stable
Indicates if the values contained represent a fast or a slow stabilized step.
Definition: fpt.c:63

fpt_data_::alphaN
double * alphaN
TODO Add comment here.
Definition: fpt.c:79

fpt_set_s_::M
int M
The number of DPT transforms.
Definition: fpt.c:97

fpt_set_s_::lengths
int * lengths
Transform lengths for fftw library.
Definition: fpt.c:121

fpt_data_::alpha_0
double alpha_0
TODO Add comment here.
Definition: fpt.c:82

fpt_set_s_::t
int t
The exponent of N.
Definition: fpt.c:100

fpt_data_::beta
double * beta
TODO Add comment here.
Definition: fpt.h:51

fpt_set_s_
Holds data for a set of cascade summations.
Definition: fpt.c:94

fpt_set_s_::kinds
fftw_r2r_kind * kinds
Transform kinds for fftw library.
Definition: fpt.c:116

fpt_set_s_::dpt
fpt_data * dpt
The DPT transform data.
Definition: fpt.c:101

fpt_set_s_::plans_dct3
fftw_plan * plans_dct3
Transform plans for the fftw library.
Definition: fpt.c:112

fpt_data_::gammaN
double * gammaN
TODO Add comment here.
Definition: fpt.c:81

fpt_set_s_::N
int N
The transform length.
Definition: fpt.c:98

fpt_data_
Holds data for a single cascade summation.
Definition: fpt.c:75

fpt_set_s_::plans_dct2
fftw_plan * plans_dct2
Transform plans for the fftw library.
Definition: fpt.c:114

fpt_set_s
struct fpt_set_s_ fpt_set_s
Holds data for a set of cascade summations.

fpt_step_::Ns
int Ns
TODO Add comment here.
Definition: fpt.c:66

fpt_data_::beta_0
double beta_0
TODO Add comment here.
Definition: fpt.c:83

fpt_step_::a22
double ** a22
The matrix components.
Definition: fpt.c:68

fpt_data_::steps
fpt_step ** steps
The cascade summation steps.
Definition: fpt.c:77

fpt_set_s_::flags
unsigned int flags
The flags.
Definition: fpt.h:60

fpt_data_::gamma_m1
double gamma_m1
TODO Add comment here.
Definition: fpt.c:84

fpt_data_::k_start
int k_start
TODO Add comment here.
Definition: fpt.c:78

fpt_step_::ts
int ts
TODO Add comment here.
Definition: fpt.c:67

fpt_data_::betaN
double * betaN
TODO Add comment here.
Definition: fpt.c:80

fpt_data
struct fpt_data_ fpt_data
Holds data for a single cascade summation.

fpt_step
struct fpt_step_ fpt_step
Holds data for a single multiplication step in the cascade summation.

fpt_set_s_::xcvecs
double ** xcvecs
Array of pointers to arrays containing the Chebyshev nodes.
Definition: fpt.c:102

fpt_data_::gamma
double * gamma
TODO Add comment here.
Definition: fpt.h:52

fpt_set_s_::kindsr
fftw_r2r_kind * kindsr
Transform kinds for fftw library.
Definition: fpt.c:118