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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/>.
*/
#include <errno.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "brill_data.h"
#include "internal.h"
static int brill_init_check_options(BDContext *bd)
{
BDPriv *s = bd->priv;
switch (bd->q_func_type) {
case BD_Q_FUNC_GUNDLACH:
s->q_func = &bdi_q_func_gundlach;
break;
case BD_Q_FUNC_EPPLEY:
if (bd->eppley_n < 4) {
bdi_log(bd, 0, "Invalid n: %d < 4\n", bd->eppley_n);
return -EINVAL;
}
s->q_func = &bdi_q_func_eppley;
break;
default:
bdi_log(bd, 0, "Unknown q function type: %d\n", bd->q_func_type);
return -EINVAL;
}
s->basis[0] = &bdi_sb_even_basis;
s->basis[1] = &bdi_sb_even_basis;
s->nb_colloc_points[0] = bd->nb_coeffs[0];
s->nb_colloc_points[1] = bd->nb_coeffs[1];
s->nb_coeffs[0] = bd->nb_coeffs[0];
s->nb_coeffs[1] = bd->nb_coeffs[1];
return 0;
}
int bd_solve(BDContext *bd)
{
BDPriv *s = bd->priv;
int ret;
if (bd->psi_minus1_coeffs) {
bdi_log(bd, 0, "Solve called multiple times on the same context.\n");
return -EINVAL;
}
ret = brill_init_check_options(bd);
if (ret < 0)
return ret;
ret = bdi_solve(bd);
if (ret < 0)
return ret;
bd->psi_minus1_coeffs = s->coeffs;
bd->stride = s->nb_coeffs[0];
return 0;
}
BDContext *bd_context_alloc(void)
{
BDContext *bd = calloc(1, sizeof(*bd));
if (!bd)
return NULL;
bd->q_func_type = BD_Q_FUNC_GUNDLACH;
bd->amplitude = 1.0;
bd->eppley_n = 5;
bd->nb_coeffs[0] = 80;
bd->nb_coeffs[1] = 80;
bd->basis_scale_factor[0] = 3.0;
bd->basis_scale_factor[1] = 3.0;
bd->log_callback = bdi_log_default_callback;
bd->priv = calloc(1, sizeof(BDPriv));
if (!bd->priv) {
free(bd);
return NULL;
}
return bd;
}
void bd_context_free(BDContext **pbd)
{
BDContext *bd = *pbd;
BDPriv *s;
if (!bd)
return;
s = bd->priv;
free(s->coeffs);
free(bd->priv);
free(bd);
*pbd = NULL;
}
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