From 41f29cbf3076db51b96f240d27d432ef31b8aa71 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 14 Apr 2015 16:00:24 +0200
Subject: A major rewrite.

Split the code into multiple files, drop the GSL dependency, introduce
configurable logging, random cleanups.
---
 init.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 init.c

(limited to 'init.c')

diff --git a/init.c b/init.c
new file mode 100644
index 0000000..759088f
--- /dev/null
+++ b/init.c
@@ -0,0 +1,133 @@
+/*
+ * 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;
+    }
+
+    if (!bd->nb_coeffs_z)
+        bd->nb_coeffs_z = bd->nb_coeffs_rho;
+
+    s->basis = &bdi_sb_even_basis;
+
+    s->nb_coeffs = bd->nb_coeffs_rho * bd->nb_coeffs_z;
+
+    s->nb_colloc_points_rho = bd->nb_coeffs_rho + bd->overdet_rho;
+    s->nb_colloc_points_z   = bd->nb_coeffs_z   + bd->overdet_z;
+
+    s->nb_colloc_points     = s->nb_colloc_points_rho * s->nb_colloc_points_z;
+
+    s->colloc_grid_order_rho = s->nb_colloc_points_rho;
+    s->colloc_grid_order_z   = s->nb_colloc_points_z;
+
+    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            = bd->nb_coeffs_rho;
+
+    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_rho = 80;
+    bd->nb_coeffs_z   = 0;
+
+    bd->basis_scale_factor_rho = 3.0;
+    bd->basis_scale_factor_z   = 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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