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/*
* Copyright 2014-2015 Anton Khirnov <anton@khirnov.net>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef BRILL_DATA_INTERNAL_H
#define BRILL_DATA_INTERNAL_H
#include <stddef.h>
#include "brill_data.h"
#define MAX(x, y) ((x) > (y) ? (x) : (y))
#define SQR(x) ((x) * (x))
#define ARRAY_ELEMS(x) (sizeof(x) / sizeof(x[0]))
#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
#define REQ_ALIGNMENT(x) (32 / sizeof(x))
/*
* small number to avoid r=0 singularities
*/
#define EPS 1E-08
/* a set of basis functions */
typedef struct BasisSet {
/* evaluate the idx-th basis function at the specified point*/
double (*eval) (double coord, int idx, double sf);
/* evaluate the first derivative of the idx-th basis function at the specified point*/
double (*eval_diff1)(double coord, int idx, double sf);
/* evaluate the second derivative of the idx-th basis function at the specified point*/
double (*eval_diff2)(double coord, int idx, double sf);
/**
* Get the idx-th collocation point for the specified order.
* idx runs from 0 to order - 1 (inclusive)
*/
double (*colloc_point)(int order, int idx, double sf);
} BasisSet;
typedef struct QFunc {
double (*q)(const BDContext *bd, double rho, double z);
double (*dq_rho)(const BDContext *bd, double rho, double z);
double (*dq_z)(const BDContext *bd, double rho, double z);
double (*d2q_rho)(const BDContext *bd, double rho, double z);
double (*d2q_z)(const BDContext *bd, double rho, double z);
double (*d2q_rho_z)(const BDContext *bd, double rho, double z);
} QFunc;
typedef struct BDPriv {
const BasisSet *basis[2];
const QFunc *q_func;
int nb_colloc_points[2];
int nb_coeffs[2];
double *coeffs;
ptrdiff_t coeffs_stride;
} BDPriv;
#define NB_COEFFS(s) (s->nb_coeffs[0] * s->nb_coeffs[1])
#define NB_COLLOC_POINTS(s) (s->nb_colloc_points[0] * s->nb_colloc_points[1])
extern const BasisSet bdi_sb_even_basis;
extern const QFunc bdi_q_func_gundlach;
extern const QFunc bdi_q_func_eppley;
int bdi_solve(BDContext *bd);
void bdi_log(const BDContext *bd, int level, const char *fmt, ...);
void bdi_log_default_callback(const BDContext *bd, int level,
const char *fmt, va_list vl);
#endif // BRILL_DATA_INTERNAL_H
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