From 627590fc42d18e44795c47f2968f298318c5038a Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Fri, 28 Feb 2014 11:36:55 +0100
Subject: Introduce cell_explorer

---
 src/multihistogram.c | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 src/multihistogram.c

(limited to 'src/multihistogram.c')

diff --git a/src/multihistogram.c b/src/multihistogram.c
new file mode 100644
index 00000000..afdb1cdb
--- /dev/null
+++ b/src/multihistogram.c
@@ -0,0 +1,139 @@
+/*
+ * multimultihistogram.c
+ *
+ * MultiHistogram with categories
+ *
+ * Copyright © 2013-2014 Deutsches Elektronen-Synchrotron DESY,
+ *                       a research centre of the Helmholtz Association.
+ *
+ * Authors:
+ *  2013-2014 Thomas White <taw@physics.org>
+ *
+ * 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.
+ *
+ * CrystFEL 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 CrystFEL.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+#include <assert.h>
+
+#include "multihistogram.h"
+
+struct _multihistogram
+{
+	double min;
+	double max;
+
+	int n_bins;
+	double bin_width;
+
+	int *bins[32];
+};
+
+
+void multihistogram_delete_all_values(MultiHistogram *hi)
+{
+	int i;
+
+	for ( i=0; i<32; i++ ) {
+		if ( hi->bins[i] != NULL ) free(hi->bins[i]);
+	}
+
+	for ( i=0; i<32; i++ ) {
+		hi->bins[i] = calloc(hi->n_bins, sizeof(int));
+	}
+}
+
+
+MultiHistogram *multihistogram_new()
+{
+	MultiHistogram *hi;
+	int i;
+
+	hi = malloc(sizeof(struct _multihistogram));
+	if ( hi == NULL ) return NULL;
+
+	hi->max = -INFINITY;
+	hi->min = INFINITY;
+
+	hi->n_bins = 50;
+
+	for ( i=0; i<32; i++ ) hi->bins[i] = NULL;
+
+	return hi;
+}
+
+
+void multihistogram_free(MultiHistogram *hi)
+{
+	int i;
+	for ( i=0; i<32; i++ ) {
+		if ( hi->bins[i] != NULL ) free(hi->bins[i]);
+	}
+	free(hi);
+}
+
+
+void multihistogram_add_value(MultiHistogram *hi, double val, int cat)
+{
+	int i, j;
+
+	j = (val - hi->min) / hi->bin_width;
+
+	/* Tidy up rounding errors */
+	if ( j < 0 ) j = 0;
+	if ( j >= hi->n_bins ) j = hi->n_bins - 1;
+
+	for ( i=0; i<32; i++ ) {
+		if ( cat & 1<<i ) hi->bins[i][j]++;
+	}
+}
+
+
+int *multihistogram_get_data(MultiHistogram *hi, int cat)
+{
+	if ( cat < 0 ) return NULL;
+	if ( cat > 31 ) return NULL;
+	return hi->bins[cat];
+}
+
+
+void multihistogram_set_min(MultiHistogram *hi, double min)
+{
+	hi->min = min;
+	hi->bin_width = (hi->max - hi->min)/hi->n_bins;
+	multihistogram_delete_all_values(hi);
+}
+
+
+void multihistogram_set_max(MultiHistogram *hi, double max)
+{
+	hi->max = max;
+	hi->bin_width = (hi->max - hi->min)/hi->n_bins;
+	multihistogram_delete_all_values(hi);
+}
+
+
+void multihistogram_set_num_bins(MultiHistogram *hi, int n)
+{
+	hi->n_bins = n;
+	hi->bin_width = (hi->max - hi->min)/hi->n_bins;
+	multihistogram_delete_all_values(hi);
+}
-- 
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