Fix to discard NaN, Inf and -Inf values from chart.

This correction adds test to several append funtions to test that NaN, Inf
and -Inf values are not added to chart. This solution follows the QPainterPath
behaviour.

Task-number: QTRD-1893

Reviewed-by: Miikka Heikkinen

1 files changed, 26 insertions, 0 deletions

diff --git a/src/charthelpers_p.h b/src/charthelpers_p.h
new file mode 100644
index 00000000..63e5cfaf
--- /dev/null
+++ b/src/charthelpers_p.h
@@ -0,0 +1,26 @@
+#ifndef CHARTHELPERS_P_H
+#define CHARTHELPERS_P_H
+
+#include <qnumeric.h>
+#include <QPointF>
+
+static inline bool isValidValue(qreal value)
+{
+    if (qIsNaN(value) || qIsInf(value)) {
+        qWarning("Ignored NaN, Inf, or -Inf value.");
+        return false;
+    }
+    return true;
+}
+
+static inline bool isValidValue(qreal x, qreal y)
+{
+    return (isValidValue(x) && isValidValue(y));
+}
+
+static inline bool isValidValue(const QPointF point)
+{
+    return (isValidValue(point.x()) && isValidValue(point.y()));
+}
+
+#endif // CHARTHELPERS_P_H