Fix roundings with lround()

src/playlist/playlistdelegates.cpp

@@ -21,6 +21,8 @@
 
 #include "config.h"
 
+#include <cmath>
+
 #include <QtGlobal>
 #include <QApplication>
 #include <QObject>
@@ -539,7 +541,7 @@ QString RatingItemDelegate::displayText(const QVariant &value, const QLocale&) c
   if (value.isNull() || value.toDouble() <= 0) return QString();
 
   // Round to the nearest 0.5
-  const double rating = double(int(value.toDouble() * RatingPainter::kStarCount * 2 + 0.5)) / 2;
+  const double rating = double(lround(value.toDouble() * RatingPainter::kStarCount * 2)) / 2;
 
   return QString::number(rating, 'f', 1);
 

src/playlist/playlistfilterparser.cpp

@@ -21,6 +21,7 @@
 #include "config.h"
 
 #include <algorithm>
+#include <cmath>
 
 #include <QList>
 #include <QMap>
@@ -180,7 +181,7 @@ class RatingComparatorDecorator : public SearchTermComparator {
  public:
   explicit RatingComparatorDecorator(SearchTermComparator *cmp) : cmp_(cmp) {}
   bool Matches(const QString &element) const override {
-    return cmp_->Matches(QString::number(static_cast<int>(element.toDouble() * 10.0 + 0.5)));
+    return cmp_->Matches(QString::number(lround(element.toDouble() * 10.0)));
   }
  private:
   QScopedPointer<SearchTermComparator> cmp_;

src/widgets/ratingwidget.cpp

@@ -20,6 +20,8 @@
 
 #include "ratingwidget.h"
 
+#include <cmath>
+
 #include <QStyleOptionFrame>
 #include <QStylePainter>
 #include <QIcon>
@@ -91,7 +93,7 @@ double RatingPainter::RatingForPos(const QPoint pos, const QRect rect) {
   if (raw > 1) return 1;
 
   // Round to the nearest 0.1
-  return double(int(raw * kStarCount * 2 + 0.5)) / (kStarCount * 2);
+  return double(lround(raw * kStarCount * 2)) / (kStarCount * 2);
 
 }
 
@@ -103,7 +105,7 @@ void RatingPainter::Paint(QPainter *painter, const QRect rect, double rating) co
   rating *= kStarCount;
 
   // Draw the stars
-  const int star = qBound(0, int(rating * 2.0 + 0.5), kStarCount * 2);
+  const int star = qBound(0, static_cast<int>(lround(rating * 2.0)), kStarCount * 2);
   painter->drawPixmap(QRect(pos, size), stars_[star], QRect(QPoint(0, 0), size));
 
 }