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/*
* Copyright 2016 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/>.
*/
#include <math.h>
#include <stddef.h>
#include <string.h>
#include "brill_data.h"
#include "internal.h"
#define GRID(arr) (arr[i * nb_coords_rho + j])
/* φφ components */
#define COMP phiphi
#define DIFF 0
#define DO_EVAL val = SQR(rrho) * psi4
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 3
#define DO_EVAL val = 4 * SQR(rrho) * psi3 * GRID(psi[3])
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 6
#define DO_EVAL val = 4 * SQR(rrho) * (GRID(psi[6]) * psi3 + 3 * psi2 * SQR(GRID(psi[3])))
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 1
#define DO_EVAL val = 2 * rrho * psi4 + 4 * SQR(rrho) * psi3 * GRID(psi[1])
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 4
#define DO_EVAL val = 8 * rrho * psi3 * GRID(psi[3]) +\
12 * SQR(rrho) * psi2 * GRID(psi[3]) * GRID(psi[1]) +\
4 * SQR(rrho) * psi3 * GRID(psi[4])
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 2
#define DO_EVAL val = 4 * SQR(rrho) * psi3 * GRID(psi[2]) +\
12 * SQR(rrho * ppsi * GRID(psi[1])) +\
16 * rrho * psi3 * GRID(psi[1]) + 2 * psi4
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#undef COMP
/* ρρ components */
#define COMP rhorho
#define DIFF 0
#define DO_EVAL val = base
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 3
#define DO_EVAL val = 2 * base * dqz
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 6
#define DO_EVAL val = 4 * SQR(dqz) * base + 2 * base * dq2z
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 1
#define DO_EVAL val = 2 * base * dqrho
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 4
#define DO_EVAL val = 4 * base * dqrho * dqz + 2 * base * dq2rho_z
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#define DIFF 2
#define DO_EVAL val = 4 * SQR(dqrho) * base + 2 * base * dq2rho
#include "eval_metric_template.c"
#undef DIFF
#undef DO_EVAL
#undef COMP
typedef void (*EvalMetricFunc)(const BDContext *bd, double *out, ptrdiff_t out_stride,
int nb_coords_rho, const double *rho,
int nb_coords_z, const double *z,
double *psi[9], double *q[9]);
static const EvalMetricFunc eval_metric_phiphi[9] = {
[0] = eval_metric_phiphi_0,
[1] = eval_metric_phiphi_1,
[2] = eval_metric_phiphi_2,
[3] = eval_metric_phiphi_3,
[4] = eval_metric_phiphi_4,
[6] = eval_metric_phiphi_6,
};
static const EvalMetricFunc eval_metric_rhorho[9] = {
[0] = eval_metric_rhorho_0,
[1] = eval_metric_rhorho_1,
[2] = eval_metric_rhorho_2,
[3] = eval_metric_rhorho_3,
[4] = eval_metric_rhorho_4,
[6] = eval_metric_rhorho_6,
};
void bdi_eval_metric(const BDContext *bd,
const double *rho, int nb_coords_rho,
const double *z, int nb_coords_z,
enum BDMetricComponent comp,
const unsigned int diff_order[2],
double *psi[9], double *q[9],
double *out, ptrdiff_t out_stride)
{
int diff_idx = diff_order[0] * 3 + diff_order[1];
const EvalMetricFunc *functab;
if (comp != BD_METRIC_COMPONENT_RHORHO &&
comp != BD_METRIC_COMPONENT_ZZ &&
comp != BD_METRIC_COMPONENT_PHIPHI) {
memset(out, 0, out_stride * nb_coords_z * sizeof(*out));
return;
}
functab = (comp == BD_METRIC_COMPONENT_PHIPHI) ?
eval_metric_phiphi : eval_metric_rhorho;
functab[diff_idx](bd, out, out_stride, nb_coords_rho, rho,
nb_coords_z, z, psi, q);
}
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